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</div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2411.10108">arXiv:2411.10108</a> <span> [<a href="https://arxiv.org/pdf/2411.10108">pdf</a>, <a href="https://arxiv.org/format/2411.10108">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atmospheric and Oceanic Physics">physics.ao-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Artificial Intelligence">cs.AI</span> </div> </div> <p class="title is-5 mathjax"> Identifying Key Drivers of Heatwaves: A Novel Spatio-Temporal Framework for Extreme Event Detection </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=P%C3%A9rez-Aracil%2C+J">J. P茅rez-Aracil</a>, <a href="/search/physics?searchtype=author&query=Pel%C3%A1ez-Rodr%C3%ADguez%2C+C">C. Pel谩ez-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=McAdam%2C+R">Ronan McAdam</a>, <a href="/search/physics?searchtype=author&query=Squintu%2C+A">Antonello Squintu</a>, <a href="/search/physics?searchtype=author&query=Marina%2C+C+M">Cosmin M. Marina</a>, <a href="/search/physics?searchtype=author&query=Lorente-Ramos%2C+E">Eugenio Lorente-Ramos</a>, <a href="/search/physics?searchtype=author&query=Luther%2C+N">Niklas Luther</a>, <a href="/search/physics?searchtype=author&query=Torralba%2C+V">Veronica Torralba</a>, <a href="/search/physics?searchtype=author&query=Scoccimarro%2C+E">Enrico Scoccimarro</a>, <a href="/search/physics?searchtype=author&query=Cavicchia%2C+L">Leone Cavicchia</a>, <a href="/search/physics?searchtype=author&query=Giuliani%2C+M">Matteo Giuliani</a>, <a href="/search/physics?searchtype=author&query=Zorita%2C+E">Eduardo Zorita</a>, <a href="/search/physics?searchtype=author&query=Hansen%2C+F">Felicitas Hansen</a>, <a href="/search/physics?searchtype=author&query=Barriopedro%2C+D">David Barriopedro</a>, <a href="/search/physics?searchtype=author&query=Garcia-Herrera%2C+R">Ricardo Garcia-Herrera</a>, <a href="/search/physics?searchtype=author&query=Guti%C3%A9rrez%2C+P+A">Pedro A. Guti茅rrez</a>, <a href="/search/physics?searchtype=author&query=Luterbacher%2C+J">J眉rg Luterbacher</a>, <a href="/search/physics?searchtype=author&query=Xoplaki%2C+E">Elena Xoplaki</a>, <a href="/search/physics?searchtype=author&query=Castelletti%2C+A">Andrea Castelletti</a>, <a href="/search/physics?searchtype=author&query=Salcedo-Sanz%2C+S">S. Salcedo-Sanz</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2411.10108v1-abstract-short" style="display: inline;"> Heatwaves (HWs) are extreme atmospheric events that produce significant societal and environmental impacts. Predicting these extreme events remains challenging, as their complex interactions with large-scale atmospheric and climatic variables are difficult to capture with traditional statistical and dynamical models. This work presents a general method for driver identification in extreme climate… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.10108v1-abstract-full').style.display = 'inline'; document.getElementById('2411.10108v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2411.10108v1-abstract-full" style="display: none;"> Heatwaves (HWs) are extreme atmospheric events that produce significant societal and environmental impacts. Predicting these extreme events remains challenging, as their complex interactions with large-scale atmospheric and climatic variables are difficult to capture with traditional statistical and dynamical models. This work presents a general method for driver identification in extreme climate events. A novel framework (STCO-FS) is proposed to identify key immediate (short-term) HW drivers by combining clustering algorithms with an ensemble evolutionary algorithm. The framework analyzes spatio-temporal data, reduces dimensionality by grouping similar geographical nodes for each variable, and develops driver selection in spatial and temporal domains, identifying the best time lags between predictive variables and HW occurrences. The proposed method has been applied to analyze HWs in the Adda river basin in Italy. The approach effectively identifies significant variables influencing HWs in this region. This research can potentially enhance our understanding of HW drivers and predictability. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.10108v1-abstract-full').style.display = 'none'; document.getElementById('2411.10108v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">28 pages, 10 figures, 4 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2405.06434">arXiv:2405.06434</a> <span> [<a href="https://arxiv.org/pdf/2405.06434">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Image and Video Processing">eess.IV</span> </div> </div> <p class="title is-5 mathjax"> Photonic Neuromorphic Accelerator for Convolutional Neural Networks based on an Integrated Reconfigurable Mesh </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Tsirigotis%2C+A">Aris Tsirigotis</a>, <a href="/search/physics?searchtype=author&query=Sarantoglou%2C+G">Gerge Sarantoglou</a>, <a href="/search/physics?searchtype=author&query=Deligiannidis%2C+S">Stavros Deligiannidis</a>, <a href="/search/physics?searchtype=author&query=Sanchez%2C+E">Erica Sanchez</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+A">Ana Gutierrez</a>, <a href="/search/physics?searchtype=author&query=Bogris%2C+A">Adonis Bogris</a>, <a href="/search/physics?searchtype=author&query=Capmany%2C+J">Jose Capmany</a>, <a href="/search/physics?searchtype=author&query=Mesaritakis%2C+C">Charis Mesaritakis</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2405.06434v1-abstract-short" style="display: inline;"> In this work, we present and experimentally validate a passive photonic-integrated neuromorphic accelerator that uses a hardware-friendly optical spectrum slicing technique through a reconfigurable silicon photonic mesh. The proposed scheme acts as an analogue convolutional engine, enabling information preprocessing in the optical domain, dimensionality reduction and extraction of spatio-temporal… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.06434v1-abstract-full').style.display = 'inline'; document.getElementById('2405.06434v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.06434v1-abstract-full" style="display: none;"> In this work, we present and experimentally validate a passive photonic-integrated neuromorphic accelerator that uses a hardware-friendly optical spectrum slicing technique through a reconfigurable silicon photonic mesh. The proposed scheme acts as an analogue convolutional engine, enabling information preprocessing in the optical domain, dimensionality reduction and extraction of spatio-temporal features. Numerical results demonstrate that utilizing only 7 passive photonic nodes, critical modules of a digital convolutional neural network can be replaced. As a result, a 98.6% accuracy on the MNIST dataset was achieved, with a power consumption reduction of at least 26% compared to digital CNNs. Experimental results confirm these findings, achieving 97.7% accuracy with only 3 passive nodes. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.06434v1-abstract-full').style.display = 'none'; document.getElementById('2405.06434v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">18 pages, 10 figures, submitted to Optica Open</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2404.16049">arXiv:2404.16049</a> <span> [<a href="https://arxiv.org/pdf/2404.16049">pdf</a>, <a href="https://arxiv.org/format/2404.16049">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computer Vision and Pattern Recognition">cs.CV</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Machine Learning">cs.LG</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Image and Video Processing">eess.IV</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Signal Processing">eess.SP</span> </div> </div> <p class="title is-5 mathjax"> Exploring the limitations of blood pressure estimation using the photoplethysmography signal </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Dias%2C+F+M">Felipe M. Dias</a>, <a href="/search/physics?searchtype=author&query=Cardenas%2C+D+A+C">Diego A. C. Cardenas</a>, <a href="/search/physics?searchtype=author&query=Toledo%2C+M+A+F">Marcelo A. F. Toledo</a>, <a href="/search/physics?searchtype=author&query=Oliveira%2C+F+A+C">Filipe A. C. Oliveira</a>, <a href="/search/physics?searchtype=author&query=Ribeiro%2C+E">Estela Ribeiro</a>, <a href="/search/physics?searchtype=author&query=Krieger%2C+J+E">Jose E. Krieger</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+M+A">Marco A. Gutierrez</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2404.16049v1-abstract-short" style="display: inline;"> Hypertension, a leading contributor to cardiovascular morbidity, underscores the need for accurate and continuous blood pressure (BP) monitoring. Photoplethysmography (PPG) presents a promising approach to this end. However, the precision of BP estimates derived from PPG signals has been the subject of ongoing debate, necessitating a comprehensive evaluation of their effectiveness and constraints.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.16049v1-abstract-full').style.display = 'inline'; document.getElementById('2404.16049v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.16049v1-abstract-full" style="display: none;"> Hypertension, a leading contributor to cardiovascular morbidity, underscores the need for accurate and continuous blood pressure (BP) monitoring. Photoplethysmography (PPG) presents a promising approach to this end. However, the precision of BP estimates derived from PPG signals has been the subject of ongoing debate, necessitating a comprehensive evaluation of their effectiveness and constraints. We developed a calibration-based Siamese ResNet model for BP estimation, using a signal input paired with a reference BP reading. We compared the use of normalized PPG (N-PPG) against the normalized Invasive Arterial Blood Pressure (N-IABP) signals as input. The N-IABP signals do not directly present systolic and diastolic values but theoretically provide a more accurate BP measure than PPG signals since it is a direct pressure sensor inside the body. Our strategy establishes a critical benchmark for PPG performance, realistically calibrating expectations for PPG's BP estimation capabilities. Nonetheless, we compared the performance of our models using different signal-filtering conditions to evaluate the impact of filtering on the results. We evaluated our method using the AAMI and the BHS standards employing the VitalDB dataset. The N-IABP signals meet with AAMI standards for both Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP), with errors of 1.29+-6.33mmHg for systolic pressure and 1.17+-5.78mmHg for systolic and diastolic pressure respectively for the raw N-IABP signal. In contrast, N-PPG signals, in their best setup, exhibited inferior performance than N-IABP, presenting 1.49+-11.82mmHg and 0.89+-7.27mmHg for systolic and diastolic pressure respectively. Our findings highlight the potential and limitations of employing PPG for BP estimation, showing that these signals contain information correlated to BP but may not be sufficient for predicting it accurately. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.16049v1-abstract-full').style.display = 'none'; document.getElementById('2404.16049v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">17 pages, 7 figures, 3 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2309.08440">arXiv:2309.08440</a> <span> [<a href="https://arxiv.org/pdf/2309.08440">pdf</a>, <a href="https://arxiv.org/format/2309.08440">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Soft Condensed Matter">cond-mat.soft</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Fluid Dynamics">physics.flu-dyn</span> </div> </div> <p class="title is-5 mathjax"> Beware of CaBER: Filament thinning rheometry does not always give `the' relaxation time of polymer solutions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Gaillard%2C+A">Antoine Gaillard</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+M+A+H">Miguel Angel Herrada Gutierrez</a>, <a href="/search/physics?searchtype=author&query=Deblais%2C+A">Antoine Deblais</a>, <a href="/search/physics?searchtype=author&query=Eggers%2C+J">Jens Eggers</a>, <a href="/search/physics?searchtype=author&query=Bonn%2C+D">Daniel Bonn</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2309.08440v4-abstract-short" style="display: inline;"> The viscoelastic relaxation time of a polymer solution is often measured using Capillary Breakup Extensional Rheometry (CaBER) where a droplet is placed between two plates which are pulled apart to form a thinning filament. For a slow plate retraction protocol, required to avoid inertio-capillary oscillations for low-viscosity liquids, we show experimentally that the CaBER relaxation time $蟿_e$ in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.08440v4-abstract-full').style.display = 'inline'; document.getElementById('2309.08440v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2309.08440v4-abstract-full" style="display: none;"> The viscoelastic relaxation time of a polymer solution is often measured using Capillary Breakup Extensional Rheometry (CaBER) where a droplet is placed between two plates which are pulled apart to form a thinning filament. For a slow plate retraction protocol, required to avoid inertio-capillary oscillations for low-viscosity liquids, we show experimentally that the CaBER relaxation time $蟿_e$ inferred from the exponential thinning regime is in fact an apparent relaxation time that may increase significantly when increasing the plate diameter and the droplet volume. Similarly, we observe that $蟿_e$ increases with the plate diameter for the classical step-strain plate separation protocol of a commercial (Haake) CaBER device and increases with the nozzle diameter for a Dripping-onto-Substrate (DoS) method. This dependence on the flow history before the formation of the viscoelastic filament is in contradiction with polymer models such as Oldroyd-B that predict a filament thinning rate $1/3蟿$ ($蟿$ being the model's relaxation time) which is a material property independent of geometrical factors. We show that this is not due to artefacts such as solvent evaporation or polymer degradation and that it can only be rationalised by finite extensibility effects (FENE-P model) for a dilute polymer solution in a viscous solvent, but not for semi-dilute solutions in a low-viscosity solvent. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.08440v4-abstract-full').style.display = 'none'; document.getElementById('2309.08440v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 September, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">21 pages, 7 figures, presented at the ICR 2023 in Athens</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2306.14919">arXiv:2306.14919</a> <span> [<a href="https://arxiv.org/pdf/2306.14919">pdf</a>, <a href="https://arxiv.org/format/2306.14919">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Machine Learning">cs.LG</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantitative Methods">q-bio.QM</span> </div> </div> <p class="title is-5 mathjax"> Beyond Chemical Language: A Multimodal Approach to Enhance Molecular Property Prediction </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Soares%2C+E">Eduardo Soares</a>, <a href="/search/physics?searchtype=author&query=Brazil%2C+E+V">Emilio Vital Brazil</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+K+F+A">Karen Fiorela Aquino Gutierrez</a>, <a href="/search/physics?searchtype=author&query=Cerqueira%2C+R">Renato Cerqueira</a>, <a href="/search/physics?searchtype=author&query=Sanders%2C+D">Dan Sanders</a>, <a href="/search/physics?searchtype=author&query=Schmidt%2C+K">Kristin Schmidt</a>, <a href="/search/physics?searchtype=author&query=Zubarev%2C+D">Dmitry Zubarev</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2306.14919v1-abstract-short" style="display: inline;"> We present a novel multimodal language model approach for predicting molecular properties by combining chemical language representation with physicochemical features. Our approach, MULTIMODAL-MOLFORMER, utilizes a causal multistage feature selection method that identifies physicochemical features based on their direct causal effect on a specific target property. These causal features are then inte… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.14919v1-abstract-full').style.display = 'inline'; document.getElementById('2306.14919v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.14919v1-abstract-full" style="display: none;"> We present a novel multimodal language model approach for predicting molecular properties by combining chemical language representation with physicochemical features. Our approach, MULTIMODAL-MOLFORMER, utilizes a causal multistage feature selection method that identifies physicochemical features based on their direct causal effect on a specific target property. These causal features are then integrated with the vector space generated by molecular embeddings from MOLFORMER. In particular, we employ Mordred descriptors as physicochemical features and identify the Markov blanket of the target property, which theoretically contains the most relevant features for accurate prediction. Our results demonstrate a superior performance of our proposed approach compared to existing state-of-the-art algorithms, including the chemical language-based MOLFORMER and graph neural networks, in predicting complex tasks such as biodegradability and PFAS toxicity estimation. Moreover, we demonstrate the effectiveness of our feature selection method in reducing the dimensionality of the Mordred feature space while maintaining or improving the model's performance. Our approach opens up promising avenues for future research in molecular property prediction by harnessing the synergistic potential of both chemical language and physicochemical features, leading to enhanced performance and advancements in the field. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.14919v1-abstract-full').style.display = 'none'; document.getElementById('2306.14919v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">14 pages, 6 Figures, 5 tables. Submited to NEURIPS 2023, Under review</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">ACM Class:</span> J.2; I.2.1 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2305.06646">arXiv:2305.06646</a> <span> [<a href="https://arxiv.org/pdf/2305.06646">pdf</a>, <a href="https://arxiv.org/format/2305.06646">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Numerical Analysis">math.NA</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computer Vision and Pattern Recognition">cs.CV</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optimization and Control">math.OC</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Data Analysis, Statistics and Probability">physics.data-an</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1361-6420/acd5f8">10.1088/1361-6420/acd5f8 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Object based Bayesian full-waveform inversion for shear elastography </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Carpio%2C+A">Ana Carpio</a>, <a href="/search/physics?searchtype=author&query=Cebrian%2C+E">Elena Cebrian</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+A">Andrea Gutierrez</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2305.06646v1-abstract-short" style="display: inline;"> We develop a computational framework to quantify uncertainty in shear elastography imaging of anomalies in tissues. We adopt a Bayesian inference formulation. Given the observed data, a forward model and their uncertainties, we find the posterior probability of parameter fields representing the geometry of the anomalies and their shear moduli. To construct a prior probability, we exploit the topol… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.06646v1-abstract-full').style.display = 'inline'; document.getElementById('2305.06646v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.06646v1-abstract-full" style="display: none;"> We develop a computational framework to quantify uncertainty in shear elastography imaging of anomalies in tissues. We adopt a Bayesian inference formulation. Given the observed data, a forward model and their uncertainties, we find the posterior probability of parameter fields representing the geometry of the anomalies and their shear moduli. To construct a prior probability, we exploit the topological energies of associated objective functions. We demonstrate the approach on synthetic two dimensional tests with smooth and irregular shapes. Sampling the posterior distribution by Markov Chain Monte Carlo (MCMC) techniques we obtain statistical information on the shear moduli and the geometrical properties of the anomalies. General affine-invariant ensemble MCMC samplers are adequate for shapes characterized by parameter sets of low to moderate dimension. However, MCMC methods are computationally expensive. For simple shapes, we devise a fast optimization scheme to calculate the maximum a posteriori (MAP) estimate representing the most likely parameter values. Then, we approximate the posterior distribution by a Gaussian distribution found by linearization about the MAP point to capture the main mode at a low computational cost. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.06646v1-abstract-full').style.display = 'none'; document.getElementById('2305.06646v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Inverse Problems 39(7) 075007 2023 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2302.13740">arXiv:2302.13740</a> <span> [<a href="https://arxiv.org/pdf/2302.13740">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Physics Education">physics.ed-ph</span> </div> </div> <p class="title is-5 mathjax"> A-BASE-DE-PROS: una implementaci贸n pr谩ctica de los Objetivos de Desarrollo Sostenible en la Universidad Polit茅cnica de Madrid </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Almendros%2C+P">Patricia Almendros</a>, <a href="/search/physics?searchtype=author&query=Otegui%2C+S">Silvia Otegui</a>, <a href="/search/physics?searchtype=author&query=Nares%2C+A">Alejandro Nares</a>, <a href="/search/physics?searchtype=author&query=del+Fresno%2C+L">Laura del Fresno</a>, <a href="/search/physics?searchtype=author&query=Ablanque%2C+J">Javier Ablanque</a>, <a href="/search/physics?searchtype=author&query=Blanco%2C+I">Irene Blanco</a>, <a href="/search/physics?searchtype=author&query=Ferrer%2C+J+R">Juan Ram贸n Ferrer</a>, <a href="/search/physics?searchtype=author&query=Benito%2C+S">Sonia Benito</a>, <a href="/search/physics?searchtype=author&query=Lopez%2C+C">Carmen Lopez</a>, <a href="/search/physics?searchtype=author&query=Garc%C3%ADa%2C+S">Sonia Garc铆a</a>, <a href="/search/physics?searchtype=author&query=Fern%C3%A1ndez%2C+L">Le贸n Fern谩ndez</a>, <a href="/search/physics?searchtype=author&query=Zubelzu%2C+S">Sergio Zubelzu</a>, <a href="/search/physics?searchtype=author&query=S%C3%A1nchez%2C+R">Ra煤l S谩nchez</a>, <a href="/search/physics?searchtype=author&query=Esteve%2C+P">Paloma Esteve</a>, <a href="/search/physics?searchtype=author&query=Benito%2C+R+M">Rosa Mar铆a Benito</a>, <a href="/search/physics?searchtype=author&query=Losada%2C+J+C">Juan Carlos Losada</a>, <a href="/search/physics?searchtype=author&query=Saa%2C+A">Antonio Saa</a>, <a href="/search/physics?searchtype=author&query=Gasc%C3%B3%2C+G">Gabriel Gasc贸</a>, <a href="/search/physics?searchtype=author&query=M%C3%A9ndez%2C+A+M">Ana M. M茅ndez</a>, <a href="/search/physics?searchtype=author&query=Montoya%2C+M">M贸nica Montoya</a>, <a href="/search/physics?searchtype=author&query=de+Francisco%2C+M">Marina de Francisco</a>, <a href="/search/physics?searchtype=author&query=Ruiz%2C+J">Jes煤s Ruiz</a>, <a href="/search/physics?searchtype=author&query=Seoanez%2C+S">Samuel Seoanez</a>, <a href="/search/physics?searchtype=author&query=Castilla%2C+S">Sara Castilla</a>, <a href="/search/physics?searchtype=author&query=Fuente%2C+D">D谩maris Fuente</a> , et al. (24 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2302.13740v1-abstract-short" style="display: inline;"> The influence of the Sustainable Development Goals (SDGs) has been widely spread over the last years, establishing new public and privat policies. Education has also been experiencing this change by aligning with the previous goals. In this chapter, we briefly summarize the main activities conducted under the Grant APS22.2003 'Service-based learning of the SDGs related to a responsible production… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.13740v1-abstract-full').style.display = 'inline'; document.getElementById('2302.13740v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2302.13740v1-abstract-full" style="display: none;"> The influence of the Sustainable Development Goals (SDGs) has been widely spread over the last years, establishing new public and privat policies. Education has also been experiencing this change by aligning with the previous goals. In this chapter, we briefly summarize the main activities conducted under the Grant APS22.2003 'Service-based learning of the SDGs related to a responsible production and consumption (A-BASE-DE-PROS)', which uses the SDG 12 as a guide line to raise the awareness of the importance of the 2030 Agenda among undergraduate and secondary-school students. In general, the service-based learning has increased the knowledge of the SDGs among the students. Furthermore, most of the (university and secondary) students found the service-learning <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.13740v1-abstract-full').style.display = 'none'; document.getElementById('2302.13740v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, in Spanish language, 8 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2203.14959">arXiv:2203.14959</a> <span> [<a href="https://arxiv.org/pdf/2203.14959">pdf</a>, <a href="https://arxiv.org/format/2203.14959">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Applications">stat.AP</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atmospheric and Oceanic Physics">physics.ao-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Data Analysis, Statistics and Probability">physics.data-an</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.renene.2022.04.065">10.1016/j.renene.2022.04.065 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Benchmarks for Solar Radiation Time Series Forecasting </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Voyant%2C+C">Cyril Voyant</a>, <a href="/search/physics?searchtype=author&query=Notton%2C+G">Gilles Notton</a>, <a href="/search/physics?searchtype=author&query=Duchaud%2C+J">Jean-Laurent Duchaud</a>, <a href="/search/physics?searchtype=author&query=Guti%C3%A9rrez%2C+L+A+G">Luis Antonio Garc铆a Guti茅rrez</a>, <a href="/search/physics?searchtype=author&query=Bright%2C+J+M">Jamie M. Bright</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+D">Dazhi Yang</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2203.14959v1-abstract-short" style="display: inline;"> With an ever-increasing share of intermittent renewable energy in the world's energy mix,there is an increasing need for advanced solar power forecasting models to optimize the operation and control of solar power plants. In order to justify the need for more elaborate forecast modeling, one must compare the performance of advanced models with naive reference methods. On this point, a rigorous for… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.14959v1-abstract-full').style.display = 'inline'; document.getElementById('2203.14959v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2203.14959v1-abstract-full" style="display: none;"> With an ever-increasing share of intermittent renewable energy in the world's energy mix,there is an increasing need for advanced solar power forecasting models to optimize the operation and control of solar power plants. In order to justify the need for more elaborate forecast modeling, one must compare the performance of advanced models with naive reference methods. On this point, a rigorous formalism using statistical tools, variational calculation and quantification of noise in the measurement is studied and five naive reference forecasting methods are considered, among which there is a newly proposed approach called ARTU (a particular autoregressive model of order two). These methods do not require any training phase nor demand any (or almost no) historical data. Additionally, motivated by the well-known benefits of ensemble forecasting, a combination of these models is considered, and then validated using data from multiple sites with diverse climatological characteristics, based on various error metrics, among which some are rarely used in the field of solar energy. The most appropriate benchmarking method depends on the salient features of the variable being forecast (e.g., seasonality, cyclicity, or conditional heteoroscedasity) as well as the forecast horizon. Hence, to ensure a fair benchmarking, forecasters should endeavor to discover the most appropriate naive reference method for their setup by testing all available options. Among the methods proposed in this paper, the combination and ARTU statistically offer the best results for the proposed study conditions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.14959v1-abstract-full').style.display = 'none'; document.getElementById('2203.14959v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">32 pages, 9 Tables and 4 Figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2203.12037">arXiv:2203.12037</a> <span> [<a href="https://arxiv.org/pdf/2203.12037">pdf</a>, <a href="https://arxiv.org/format/2203.12037">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2022.166716">10.1016/j.nima.2022.166716 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Quality Control of Mass-Produced GEM Detectors for the CMS GE1/1 Muon Upgrade </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Abbas%2C+M">M. Abbas</a>, <a href="/search/physics?searchtype=author&query=Abbrescia%2C+M">M. Abbrescia</a>, <a href="/search/physics?searchtype=author&query=Abdalla%2C+H">H. Abdalla</a>, <a href="/search/physics?searchtype=author&query=Abdelalim%2C+A">A. Abdelalim</a>, <a href="/search/physics?searchtype=author&query=AbuZeid%2C+S">S. AbuZeid</a>, <a href="/search/physics?searchtype=author&query=Agapitos%2C+A">A. Agapitos</a>, <a href="/search/physics?searchtype=author&query=Ahmad%2C+A">A. Ahmad</a>, <a href="/search/physics?searchtype=author&query=Ahmed%2C+A">A. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Ahmed%2C+W">W. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Aim%C3%A8%2C+C">C. Aim猫</a>, <a href="/search/physics?searchtype=author&query=Aruta%2C+C">C. Aruta</a>, <a href="/search/physics?searchtype=author&query=Asghar%2C+I">I. Asghar</a>, <a href="/search/physics?searchtype=author&query=Aspell%2C+P">P. Aspell</a>, <a href="/search/physics?searchtype=author&query=Avila%2C+C">C. Avila</a>, <a href="/search/physics?searchtype=author&query=Babbar%2C+J">J. Babbar</a>, <a href="/search/physics?searchtype=author&query=Ban%2C+Y">Y. Ban</a>, <a href="/search/physics?searchtype=author&query=Band%2C+R">R. Band</a>, <a href="/search/physics?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">L. Benussi</a>, <a href="/search/physics?searchtype=author&query=Beyrouthy%2C+T">T. Beyrouthy</a>, <a href="/search/physics?searchtype=author&query=Bhatnagar%2C+V">V. Bhatnagar</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+M">M. Bianco</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">S. Bianco</a>, <a href="/search/physics?searchtype=author&query=Black%2C+K">K. Black</a>, <a href="/search/physics?searchtype=author&query=Borgonovi%2C+L">L. Borgonovi</a> , et al. (157 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2203.12037v1-abstract-short" style="display: inline;"> The series of upgrades to the Large Hadron Collider, culminating in the High Luminosity Large Hadron Collider, will enable a significant expansion of the physics program of the CMS experiment. However, the accelerator upgrades will also make the experimental conditions more challenging, with implications for detector operations, triggering, and data analysis. The luminosity of the proton-proton co… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.12037v1-abstract-full').style.display = 'inline'; document.getElementById('2203.12037v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2203.12037v1-abstract-full" style="display: none;"> The series of upgrades to the Large Hadron Collider, culminating in the High Luminosity Large Hadron Collider, will enable a significant expansion of the physics program of the CMS experiment. However, the accelerator upgrades will also make the experimental conditions more challenging, with implications for detector operations, triggering, and data analysis. The luminosity of the proton-proton collisions is expected to exceed $2-3\times10^{34}$~cm$^{-2}$s$^{-1}$ for Run 3 (starting in 2022), and it will be at least $5\times10^{34}$~cm$^{-2}$s$^{-1}$ when the High Luminosity Large Hadron Collider is completed for Run 4. These conditions will affect muon triggering, identification, and measurement, which are critical capabilities of the experiment. To address these challenges, additional muon detectors are being installed in the CMS endcaps, based on Gas Electron Multiplier technology. For this purpose, 161 large triple-Gas Electron Multiplier detectors have been constructed and tested. Installation of these devices began in 2019 with the GE1/1 station and will be followed by two additional stations, GE2/1 and ME0, to be installed in 2023 and 2026, respectively. The assembly and quality control of the GE1/1 detectors were distributed across several production sites around the world. We motivate and discuss the quality control procedures that were developed to standardize the performance of the detectors, and we present the final results of the production. Out of 161 detectors produced, 156 detectors passed all tests, and 144 detectors are now installed in the CMS experiment. The various visual inspections, gas tightness tests, intrinsic noise rate characterizations, and effective gas gain and response uniformity tests allowed the project to achieve this high success rate. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.12037v1-abstract-full').style.display = 'none'; document.getElementById('2203.12037v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">45 pages, 39 figures, submitted to Nuclear Instruments and Methods in Physics Research Section A</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2107.09364">arXiv:2107.09364</a> <span> [<a href="https://arxiv.org/pdf/2107.09364">pdf</a>, <a href="https://arxiv.org/format/2107.09364">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/16/11/P11014">10.1088/1748-0221/16/11/P11014 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Performance of a Triple-GEM Demonstrator in $pp$ Collisions at the CMS Detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Abbas%2C+M">M. Abbas</a>, <a href="/search/physics?searchtype=author&query=Abbrescia%2C+M">M. Abbrescia</a>, <a href="/search/physics?searchtype=author&query=Abdalla%2C+H">H. Abdalla</a>, <a href="/search/physics?searchtype=author&query=Abdelalim%2C+A">A. Abdelalim</a>, <a href="/search/physics?searchtype=author&query=AbuZeid%2C+S">S. AbuZeid</a>, <a href="/search/physics?searchtype=author&query=Agapitos%2C+A">A. Agapitos</a>, <a href="/search/physics?searchtype=author&query=Ahmad%2C+A">A. Ahmad</a>, <a href="/search/physics?searchtype=author&query=Ahmed%2C+A">A. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Ahmed%2C+W">W. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Aim%C3%A8%2C+C">C. Aim猫</a>, <a href="/search/physics?searchtype=author&query=Aruta%2C+C">C. Aruta</a>, <a href="/search/physics?searchtype=author&query=Asghar%2C+I">I. Asghar</a>, <a href="/search/physics?searchtype=author&query=Aspell%2C+P">P. Aspell</a>, <a href="/search/physics?searchtype=author&query=Avila%2C+C">C. Avila</a>, <a href="/search/physics?searchtype=author&query=Babbar%2C+J">J. Babbar</a>, <a href="/search/physics?searchtype=author&query=Ban%2C+Y">Y. Ban</a>, <a href="/search/physics?searchtype=author&query=Band%2C+R">R. Band</a>, <a href="/search/physics?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">L. Benussi</a>, <a href="/search/physics?searchtype=author&query=Bhatnagar%2C+V">V. Bhatnagar</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+M">M. Bianco</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">S. Bianco</a>, <a href="/search/physics?searchtype=author&query=Black%2C+K">K. Black</a>, <a href="/search/physics?searchtype=author&query=Borgonovi%2C+L">L. Borgonovi</a>, <a href="/search/physics?searchtype=author&query=Bouhali%2C+O">O. Bouhali</a> , et al. (156 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2107.09364v2-abstract-short" style="display: inline;"> After the Phase-2 high-luminosity upgrade to the Large Hadron Collider (LHC), the collision rate and therefore the background rate will significantly increase, particularly in the high $畏$ region. To improve both the tracking and triggering of muons, the Compact Muon Solenoid (CMS) Collaboration plans to install triple-layer Gas Electron Multiplier (GEM) detectors in the CMS muon endcaps. Demonstr… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.09364v2-abstract-full').style.display = 'inline'; document.getElementById('2107.09364v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2107.09364v2-abstract-full" style="display: none;"> After the Phase-2 high-luminosity upgrade to the Large Hadron Collider (LHC), the collision rate and therefore the background rate will significantly increase, particularly in the high $畏$ region. To improve both the tracking and triggering of muons, the Compact Muon Solenoid (CMS) Collaboration plans to install triple-layer Gas Electron Multiplier (GEM) detectors in the CMS muon endcaps. Demonstrator GEM detectors were installed in CMS during 2017 to gain operational experience and perform a preliminary investigation of detector performance. We present the results of triple-GEM detector performance studies performed in situ during normal CMS and LHC operations in 2018. The distribution of cluster size and the efficiency to reconstruct high $p_T$ muons in proton--proton collisions are presented as well as the measurement of the environmental background rate to produce hits in the GEM detector. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.09364v2-abstract-full').style.display = 'none'; document.getElementById('2107.09364v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 July, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 5 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2107.08152">arXiv:2107.08152</a> <span> [<a href="https://arxiv.org/pdf/2107.08152">pdf</a>, <a href="https://arxiv.org/format/2107.08152">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/s10751-016-1382-6">10.1007/s10751-016-1382-6 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Limit on the Electric Charge of Antihydrogen </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Capra%2C+A">A. Capra</a>, <a href="/search/physics?searchtype=author&query=Amole%2C+C">C. Amole</a>, <a href="/search/physics?searchtype=author&query=Ashkezari%2C+M+D">M. D. Ashkezari</a>, <a href="/search/physics?searchtype=author&query=Baquero-Ruiz%2C+M">M. Baquero-Ruiz</a>, <a href="/search/physics?searchtype=author&query=Bertsche%2C+W">W. Bertsche</a>, <a href="/search/physics?searchtype=author&query=Butler%2C+E">E. Butler</a>, <a href="/search/physics?searchtype=author&query=Cesar%2C+C+L">C. L. Cesar</a>, <a href="/search/physics?searchtype=author&query=Charlton%2C+M">M. Charlton</a>, <a href="/search/physics?searchtype=author&query=Eriksson%2C+S">S. Eriksson</a>, <a href="/search/physics?searchtype=author&query=Fajans%2C+J">J. Fajans</a>, <a href="/search/physics?searchtype=author&query=Friesen%2C+T">T. Friesen</a>, <a href="/search/physics?searchtype=author&query=Fujiwara%2C+M+C">M. C. Fujiwara</a>, <a href="/search/physics?searchtype=author&query=Gill%2C+D+R">D. R. Gill</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+A">A. Gutierrez</a>, <a href="/search/physics?searchtype=author&query=Hangst%2C+J+S">J. S. Hangst</a>, <a href="/search/physics?searchtype=author&query=Hardy%2C+W+N">W. N. Hardy</a>, <a href="/search/physics?searchtype=author&query=Hayden%2C+M+E">M. E. Hayden</a>, <a href="/search/physics?searchtype=author&query=Isaac%2C+C+A">C. A. Isaac</a>, <a href="/search/physics?searchtype=author&query=Jonsell%2C+S">S. Jonsell</a>, <a href="/search/physics?searchtype=author&query=Kurchaninov%2C+L+.">L . Kurchaninov</a>, <a href="/search/physics?searchtype=author&query=Little%2C+A">A. Little</a>, <a href="/search/physics?searchtype=author&query=McKenna%2C+J+T+K">J. T. K. McKenna</a>, <a href="/search/physics?searchtype=author&query=Menary%2C+S">S. Menary</a>, <a href="/search/physics?searchtype=author&query=Napoli%2C+S+C">S. C. Napoli</a>, <a href="/search/physics?searchtype=author&query=Nolan%2C+P">P. Nolan</a> , et al. (15 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2107.08152v1-abstract-short" style="display: inline;"> The ALPHA collaboration has successfully demonstrated the production and the confinement of cold antihydrogen, $\overline{\mathrm{H}}$. An analysis of trapping data allowed a stringent limit to be placed on the electric charge of the simplest antiatom. Charge neutrality of matter is known to a very high precision, hence a neutrality limit of $\overline{\mathrm{H}}$ provides a test of CPT invarianc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.08152v1-abstract-full').style.display = 'inline'; document.getElementById('2107.08152v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2107.08152v1-abstract-full" style="display: none;"> The ALPHA collaboration has successfully demonstrated the production and the confinement of cold antihydrogen, $\overline{\mathrm{H}}$. An analysis of trapping data allowed a stringent limit to be placed on the electric charge of the simplest antiatom. Charge neutrality of matter is known to a very high precision, hence a neutrality limit of $\overline{\mathrm{H}}$ provides a test of CPT invariance. The experimental technique is based on the measurement of the deflection of putatively charged $\overline{\mathrm{H}}$ in an electric field. The tendency for trapped $\overline{\mathrm{H}}$ atoms to be displaced by electrostatic fields is measured and compared to the results of a detailed simulation of $\overline{\mathrm{H}}$ dynamics in the trap. An extensive survey of the systematic errors is performed, with particular attention to those due to the silicon vertex detector, which is the device used to determine the $\overline{\mathrm{H}}$ annihilation position. The limit obtained on the charge of the $\overline{\mathrm{H}}$ atom is \mbox{$ Q = (-1.3\pm1.8\pm0.4)\times10^{-8}$}, representing the first precision measurement with $\overline{\mathrm{H}}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.08152v1-abstract-full').style.display = 'none'; document.getElementById('2107.08152v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 July, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Hyperfine Interact 238, 9 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2107.03621">arXiv:2107.03621</a> <span> [<a href="https://arxiv.org/pdf/2107.03621">pdf</a>, <a href="https://arxiv.org/format/2107.03621">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/16/12/P12026">10.1088/1748-0221/16/12/P12026 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Modeling the triple-GEM detector response to background particles for the CMS Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Abbas%2C+M">M. Abbas</a>, <a href="/search/physics?searchtype=author&query=Abbrescia%2C+M">M. Abbrescia</a>, <a href="/search/physics?searchtype=author&query=Abdalla%2C+H">H. Abdalla</a>, <a href="/search/physics?searchtype=author&query=Abdelalim%2C+A">A. Abdelalim</a>, <a href="/search/physics?searchtype=author&query=AbuZeid%2C+S">S. AbuZeid</a>, <a href="/search/physics?searchtype=author&query=Agapitos%2C+A">A. Agapitos</a>, <a href="/search/physics?searchtype=author&query=Ahmad%2C+A">A. Ahmad</a>, <a href="/search/physics?searchtype=author&query=Ahmed%2C+A">A. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Ahmed%2C+W">W. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Aim%C3%A8%2C+C">C. Aim猫</a>, <a href="/search/physics?searchtype=author&query=Aruta%2C+C">C. Aruta</a>, <a href="/search/physics?searchtype=author&query=Asghar%2C+I">I. Asghar</a>, <a href="/search/physics?searchtype=author&query=Aspell%2C+P">P. Aspell</a>, <a href="/search/physics?searchtype=author&query=Avila%2C+C">C. Avila</a>, <a href="/search/physics?searchtype=author&query=Azhgirey%2C+I">I. Azhgirey</a>, <a href="/search/physics?searchtype=author&query=Babbar%2C+J">J. Babbar</a>, <a href="/search/physics?searchtype=author&query=Ban%2C+Y">Y. Ban</a>, <a href="/search/physics?searchtype=author&query=Band%2C+R">R. Band</a>, <a href="/search/physics?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">L. Benussi</a>, <a href="/search/physics?searchtype=author&query=Bhatnagar%2C+V">V. Bhatnagar</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+M">M. Bianco</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">S. Bianco</a>, <a href="/search/physics?searchtype=author&query=Black%2C+K">K. Black</a>, <a href="/search/physics?searchtype=author&query=Borgonovi%2C+L">L. Borgonovi</a> , et al. (164 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2107.03621v1-abstract-short" style="display: inline;"> An estimate of environmental background hit rate on triple-GEM chambers is performed using Monte Carlo (MC) simulation and compared to data taken by test chambers installed in the CMS experiment (GE1/1) during Run-2 at the Large Hadron Collider (LHC). The hit rate is measured using data collected with proton-proton collisions at 13 TeV and a luminosity of 1.5$\times10^{34}$ cm$^{-2}$ s$^{-1}$. The… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.03621v1-abstract-full').style.display = 'inline'; document.getElementById('2107.03621v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2107.03621v1-abstract-full" style="display: none;"> An estimate of environmental background hit rate on triple-GEM chambers is performed using Monte Carlo (MC) simulation and compared to data taken by test chambers installed in the CMS experiment (GE1/1) during Run-2 at the Large Hadron Collider (LHC). The hit rate is measured using data collected with proton-proton collisions at 13 TeV and a luminosity of 1.5$\times10^{34}$ cm$^{-2}$ s$^{-1}$. The simulation framework uses a combination of the FLUKA and Geant4 packages to obtain the hit rate. FLUKA provides the radiation environment around the GE1/1 chambers, which is comprised of the particle flux with momentum direction and energy spectra ranging from $10^{-11}$ to $10^{4}$ MeV for neutrons, $10^{-3}$ to $10^{4}$ MeV for $纬$'s, $10^{-2}$ to $10^{4}$ MeV for $e^{\pm}$, and $10^{-1}$ to $10^{4}$ MeV for charged hadrons. Geant4 provides an estimate of detector response (sensitivity) based on an accurate description of detector geometry, material composition and interaction of particles with the various detector layers. The MC simulated hit rate is estimated as a function of the perpendicular distance from the beam line and agrees with data within the assigned uncertainties of 10-14.5%. This simulation framework can be used to obtain a reliable estimate of background rates expected at the High Luminosity LHC. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.03621v1-abstract-full').style.display = 'none'; document.getElementById('2107.03621v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 July, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">16 pages, 9 figures, 6 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2009.09505">arXiv:2009.09505</a> <span> [<a href="https://arxiv.org/pdf/2009.09505">pdf</a>, <a href="https://arxiv.org/format/2009.09505">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/15/12/P12019">10.1088/1748-0221/15/12/P12019 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Interstrip Capacitances of the Readout Board used in Large Triple-GEM Detectors for the CMS Muon Upgrade </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Abbas%2C+M">M. Abbas</a>, <a href="/search/physics?searchtype=author&query=Abbrescia%2C+M">M. Abbrescia</a>, <a href="/search/physics?searchtype=author&query=Abdalla%2C+H">H. Abdalla</a>, <a href="/search/physics?searchtype=author&query=Abdelalim%2C+A">A. Abdelalim</a>, <a href="/search/physics?searchtype=author&query=AbuZeid%2C+S">S. AbuZeid</a>, <a href="/search/physics?searchtype=author&query=Agapitos%2C+A">A. Agapitos</a>, <a href="/search/physics?searchtype=author&query=Ahmad%2C+A">A. Ahmad</a>, <a href="/search/physics?searchtype=author&query=Ahmed%2C+A">A. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Ahmed%2C+W">W. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Aim%C3%A8%2C+C">C. Aim猫</a>, <a href="/search/physics?searchtype=author&query=Aruta%2C+C">C. Aruta</a>, <a href="/search/physics?searchtype=author&query=Asghar%2C+I">I. Asghar</a>, <a href="/search/physics?searchtype=author&query=Aspell%2C+P">P. Aspell</a>, <a href="/search/physics?searchtype=author&query=Avila%2C+C">C. Avila</a>, <a href="/search/physics?searchtype=author&query=Babbar%2C+J">J. Babbar</a>, <a href="/search/physics?searchtype=author&query=Ban%2C+Y">Y. Ban</a>, <a href="/search/physics?searchtype=author&query=Band%2C+R">R. Band</a>, <a href="/search/physics?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">L. Benussi</a>, <a href="/search/physics?searchtype=author&query=Bhatnagar%2C+V">V. Bhatnagar</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+M">M. Bianco</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">S. Bianco</a>, <a href="/search/physics?searchtype=author&query=Black%2C+K">K. Black</a>, <a href="/search/physics?searchtype=author&query=Borgonovi%2C+L">L. Borgonovi</a>, <a href="/search/physics?searchtype=author&query=Bouhali%2C+O">O. Bouhali</a> , et al. (156 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2009.09505v1-abstract-short" style="display: inline;"> We present analytical calculations, Finite Element Analysis modeling, and physical measurements of the interstrip capacitances for different potential strip geometries and dimensions of the readout boards for the GE2/1 triple-Gas Electron Multiplier detector in the CMS muon system upgrade. The main goal of the study is to find configurations that minimize the interstrip capacitances and consequent… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.09505v1-abstract-full').style.display = 'inline'; document.getElementById('2009.09505v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2009.09505v1-abstract-full" style="display: none;"> We present analytical calculations, Finite Element Analysis modeling, and physical measurements of the interstrip capacitances for different potential strip geometries and dimensions of the readout boards for the GE2/1 triple-Gas Electron Multiplier detector in the CMS muon system upgrade. The main goal of the study is to find configurations that minimize the interstrip capacitances and consequently maximize the signal-to-noise ratio for the detector. We find agreement at the 1.5--4.8% level between the two methods of calculations and on the average at the 17% level between calculations and measurements. A configuration with halved strip lengths and doubled strip widths results in a measured 27--29% reduction over the original configuration while leaving the total number of strips unchanged. We have now adopted this design modification for all eight module types of the GE2/1 detector and will produce the final detector with this new strip design. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.09505v1-abstract-full').style.display = 'none'; document.getElementById('2009.09505v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 September, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">22 pages, 14 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> 2020 JINST 15 P12019 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1907.13228">arXiv:1907.13228</a> <span> [<a href="https://arxiv.org/pdf/1907.13228">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Dual-Drive Directional Couplers for Programmable Integrated Photonics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Lopez%2C+D+P">Daniel Perez Lopez</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+A+M">Ana M. Gutierrez</a>, <a href="/search/physics?searchtype=author&query=Sanchez%2C+E">Erica Sanchez</a>, <a href="/search/physics?searchtype=author&query=Dasmahapatra%2C+P">Prometheus Dasmahapatra</a>, <a href="/search/physics?searchtype=author&query=Capmany%2C+J">Jose Capmany</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1907.13228v1-abstract-short" style="display: inline;"> A novel class of photonic integrated circuits employs large-scale integration of combined beam splitters and waveguides loaded with phase actuators to provide complex linear processing functionalities that can be reconfigured dynamically. Here, we propose and experimentally demonstrate a thermally-actuated Dual-Drive Directional Coupler (DD-DC) design, integrated in a silicon nitride platform, fun… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.13228v1-abstract-full').style.display = 'inline'; document.getElementById('1907.13228v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1907.13228v1-abstract-full" style="display: none;"> A novel class of photonic integrated circuits employs large-scale integration of combined beam splitters and waveguides loaded with phase actuators to provide complex linear processing functionalities that can be reconfigured dynamically. Here, we propose and experimentally demonstrate a thermally-actuated Dual-Drive Directional Coupler (DD-DC) design, integrated in a silicon nitride platform, functioning both as a standalone optical component providing arbitrary optical beam splitting and common phase as well as for its use in waveguide mesh arrangements. We analyze the experimental demonstration of the first integration of a triangular waveguide mesh arrangement, and the first DD-DC based arrangement along with an extended analysis of its performance and scalability. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.13228v1-abstract-full').style.display = 'none'; document.getElementById('1907.13228v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1608.07537">arXiv:1608.07537</a> <span> [<a href="https://arxiv.org/pdf/1608.07537">pdf</a>, <a href="https://arxiv.org/format/1608.07537">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.5170/CERN-2016-004">10.5170/CERN-2016-004 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Updated baseline for a staged Compact Linear Collider </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=CLIC%2C+T">The CLIC</a>, <a href="/search/physics?searchtype=author&query=collaborations%2C+C">CLICdp collaborations</a>, <a href="/search/physics?searchtype=author&query=%3A"> :</a>, <a href="/search/physics?searchtype=author&query=Boland%2C+M+J">M. J. Boland</a>, <a href="/search/physics?searchtype=author&query=Felzmann%2C+U">U. Felzmann</a>, <a href="/search/physics?searchtype=author&query=Giansiracusa%2C+P+J">P. J. Giansiracusa</a>, <a href="/search/physics?searchtype=author&query=Lucas%2C+T+G">T. G. Lucas</a>, <a href="/search/physics?searchtype=author&query=Rassool%2C+R+P">R. P. Rassool</a>, <a href="/search/physics?searchtype=author&query=Balazs%2C+C">C. Balazs</a>, <a href="/search/physics?searchtype=author&query=Charles%2C+T+K">T. K. Charles</a>, <a href="/search/physics?searchtype=author&query=Afanaciev%2C+K">K. Afanaciev</a>, <a href="/search/physics?searchtype=author&query=Emeliantchik%2C+I">I. Emeliantchik</a>, <a href="/search/physics?searchtype=author&query=Ignatenko%2C+A">A. Ignatenko</a>, <a href="/search/physics?searchtype=author&query=Makarenko%2C+V">V. Makarenko</a>, <a href="/search/physics?searchtype=author&query=Shumeiko%2C+N">N. Shumeiko</a>, <a href="/search/physics?searchtype=author&query=Patapenka%2C+A">A. Patapenka</a>, <a href="/search/physics?searchtype=author&query=Zhuk%2C+I">I. Zhuk</a>, <a href="/search/physics?searchtype=author&query=Hoffman%2C+A+C+A">A. C. Abusleme Hoffman</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+M+A+D">M. A. Diaz Gutierrez</a>, <a href="/search/physics?searchtype=author&query=Gonzalez%2C+M+V">M. Vogel Gonzalez</a>, <a href="/search/physics?searchtype=author&query=Chi%2C+Y">Y. Chi</a>, <a href="/search/physics?searchtype=author&query=He%2C+X">X. He</a>, <a href="/search/physics?searchtype=author&query=Pei%2C+G">G. Pei</a>, <a href="/search/physics?searchtype=author&query=Pei%2C+S">S. Pei</a>, <a href="/search/physics?searchtype=author&query=Shu%2C+G">G. Shu</a> , et al. (493 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1608.07537v3-abstract-short" style="display: inline;"> The Compact Linear Collider (CLIC) is a multi-TeV high-luminosity linear e+e- collider under development. For an optimal exploitation of its physics potential, CLIC is foreseen to be built and operated in a staged approach with three centre-of-mass energy stages ranging from a few hundred GeV up to 3 TeV. The first stage will focus on precision Standard Model physics, in particular Higgs and top-q… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1608.07537v3-abstract-full').style.display = 'inline'; document.getElementById('1608.07537v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1608.07537v3-abstract-full" style="display: none;"> The Compact Linear Collider (CLIC) is a multi-TeV high-luminosity linear e+e- collider under development. For an optimal exploitation of its physics potential, CLIC is foreseen to be built and operated in a staged approach with three centre-of-mass energy stages ranging from a few hundred GeV up to 3 TeV. The first stage will focus on precision Standard Model physics, in particular Higgs and top-quark measurements. Subsequent stages will focus on measurements of rare Higgs processes, as well as searches for new physics processes and precision measurements of new states, e.g. states previously discovered at LHC or at CLIC itself. In the 2012 CLIC Conceptual Design Report, a fully optimised 3 TeV collider was presented, while the proposed lower energy stages were not studied to the same level of detail. This report presents an updated baseline staging scenario for CLIC. The scenario is the result of a comprehensive study addressing the performance, cost and power of the CLIC accelerator complex as a function of centre-of-mass energy and it targets optimal physics output based on the current physics landscape. The optimised staging scenario foresees three main centre-of-mass energy stages at 380 GeV, 1.5 TeV and 3 TeV for a full CLIC programme spanning 22 years. For the first stage, an alternative to the CLIC drive beam scheme is presented in which the main linac power is produced using X-band klystrons. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1608.07537v3-abstract-full').style.display = 'none'; document.getElementById('1608.07537v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 March, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 August, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">57 pages, 27 figures, 12 tables, published as CERN Yellow Report. Updated version: Minor layout changes for print version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-2016-004 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1512.08529">arXiv:1512.08529</a> <span> [<a href="https://arxiv.org/pdf/1512.08529">pdf</a>, <a href="https://arxiv.org/ps/1512.08529">ps</a>, <a href="https://arxiv.org/format/1512.08529">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> A novel application of Fiber Bragg Grating (FBG) sensors in MPGD </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Abbaneo%2C+D">D. Abbaneo</a>, <a href="/search/physics?searchtype=author&query=Abbas%2C+M">M. Abbas</a>, <a href="/search/physics?searchtype=author&query=Abbrescia%2C+M">M. Abbrescia</a>, <a href="/search/physics?searchtype=author&query=Abdelalim%2C+A+A">A. A. Abdelalim</a>, <a href="/search/physics?searchtype=author&query=Akl%2C+M+A">M. Abi Akl</a>, <a href="/search/physics?searchtype=author&query=Aboamer%2C+O">O. Aboamer</a>, <a href="/search/physics?searchtype=author&query=Acosta%2C+D">D. Acosta</a>, <a href="/search/physics?searchtype=author&query=Ahmad%2C+A">A. Ahmad</a>, <a href="/search/physics?searchtype=author&query=Ahmed%2C+W">W. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Ahmed%2C+W">W. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Aleksandrov%2C+A">A. Aleksandrov</a>, <a href="/search/physics?searchtype=author&query=Aly%2C+R">R. Aly</a>, <a href="/search/physics?searchtype=author&query=Altieri%2C+P">P. Altieri</a>, <a href="/search/physics?searchtype=author&query=Asawatangtrakuldee%2C+C">C. Asawatangtrakuldee</a>, <a href="/search/physics?searchtype=author&query=Aspell%2C+P">P. Aspell</a>, <a href="/search/physics?searchtype=author&query=Assran%2C+Y">Y. Assran</a>, <a href="/search/physics?searchtype=author&query=Awan%2C+I">I. Awan</a>, <a href="/search/physics?searchtype=author&query=Bally%2C+S">S. Bally</a>, <a href="/search/physics?searchtype=author&query=Ban%2C+Y">Y. Ban</a>, <a href="/search/physics?searchtype=author&query=Banerjee%2C+S">S. Banerjee</a>, <a href="/search/physics?searchtype=author&query=Barashko%2C+V">V. Barashko</a>, <a href="/search/physics?searchtype=author&query=Barria%2C+P">P. Barria</a>, <a href="/search/physics?searchtype=author&query=Bencze%2C+G">G. Bencze</a>, <a href="/search/physics?searchtype=author&query=Beni%2C+N">N. Beni</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">L. Benussi</a> , et al. (133 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1512.08529v1-abstract-short" style="display: inline;"> We present a novel application of Fiber Bragg Grating (FBG) sensors in the construction and characterisation of Micro Pattern Gaseous Detector (MPGD), with particular attention to the realisation of the largest triple (Gas electron Multiplier) GEM chambers so far operated, the GE1/1 chambers of the CMS experiment at LHC. The GE1/1 CMS project consists of 144 GEM chambers of about 0.5 m2 active are… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.08529v1-abstract-full').style.display = 'inline'; document.getElementById('1512.08529v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1512.08529v1-abstract-full" style="display: none;"> We present a novel application of Fiber Bragg Grating (FBG) sensors in the construction and characterisation of Micro Pattern Gaseous Detector (MPGD), with particular attention to the realisation of the largest triple (Gas electron Multiplier) GEM chambers so far operated, the GE1/1 chambers of the CMS experiment at LHC. The GE1/1 CMS project consists of 144 GEM chambers of about 0.5 m2 active area each, employing three GEM foils per chamber, to be installed in the forward region of the CMS endcap during the long shutdown of LHC in 2108-2019. The large active area of each GE1/1 chamber consists of GEM foils that are mechanically stretched in order to secure their flatness and the consequent uniform performance of the GE1/1 chamber across its whole active surface. So far FBGs have been used in high energy physics mainly as high precision positioning and re-positioning sensors and as low cost, easy to mount, low space consuming temperature sensors. FBGs are also commonly used for very precise strain measurements in material studies. In this work we present a novel use of FBGs as flatness and mechanical tensioning sensors applied to the wide GEM foils of the GE1/1 chambers. A network of FBG sensors have been used to determine the optimal mechanical tension applied and to characterise the mechanical tension that should be applied to the foils. We discuss the results of the test done on a full-sized GE1/1 final prototype, the studies done to fully characterise the GEM material, how this information was used to define a standard assembly procedure and possible future developments. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.08529v1-abstract-full').style.display = 'none'; document.getElementById('1512.08529v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 December, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 pages, 4 figures, presented by Luigi Benussi at MPGD 2015 (Trieste, Italy). arXiv admin note: text overlap with arXiv:1512.08481</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> INFN-15-10/LNF </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1512.08481">arXiv:1512.08481</a> <span> [<a href="https://arxiv.org/pdf/1512.08481">pdf</a>, <a href="https://arxiv.org/ps/1512.08481">ps</a>, <a href="https://arxiv.org/format/1512.08481">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2016.01.059">10.1016/j.nima.2016.01.059 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Fiber Bragg Grating (FBG) sensors as flatness and mechanical stretching sensors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Abbaneo%2C+D">D. Abbaneo</a>, <a href="/search/physics?searchtype=author&query=Abbas%2C+M">M. Abbas</a>, <a href="/search/physics?searchtype=author&query=Abbrescia%2C+M">M. Abbrescia</a>, <a href="/search/physics?searchtype=author&query=Abdelalim%2C+A+A">A. A. Abdelalim</a>, <a href="/search/physics?searchtype=author&query=Akl%2C+M+A">M. Abi Akl</a>, <a href="/search/physics?searchtype=author&query=Aboamer%2C+O">O. Aboamer</a>, <a href="/search/physics?searchtype=author&query=Acosta%2C+D">D. Acosta</a>, <a href="/search/physics?searchtype=author&query=Ahmad%2C+A">A. Ahmad</a>, <a href="/search/physics?searchtype=author&query=Ahmed%2C+W">W. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Ahmed%2C+W">W. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Aleksandrov%2C+A">A. Aleksandrov</a>, <a href="/search/physics?searchtype=author&query=Aly%2C+R">R. Aly</a>, <a href="/search/physics?searchtype=author&query=Altieri%2C+P">P. Altieri</a>, <a href="/search/physics?searchtype=author&query=Asawatangtrakuldee%2C+C">C. Asawatangtrakuldee</a>, <a href="/search/physics?searchtype=author&query=Aspell%2C+P">P. Aspell</a>, <a href="/search/physics?searchtype=author&query=Assran%2C+Y">Y. Assran</a>, <a href="/search/physics?searchtype=author&query=Awan%2C+I">I. Awan</a>, <a href="/search/physics?searchtype=author&query=Bally%2C+S">S. Bally</a>, <a href="/search/physics?searchtype=author&query=Ban%2C+Y">Y. Ban</a>, <a href="/search/physics?searchtype=author&query=Banerjee%2C+S">S. Banerjee</a>, <a href="/search/physics?searchtype=author&query=Barashko%2C+V">V. Barashko</a>, <a href="/search/physics?searchtype=author&query=Barria%2C+P">P. Barria</a>, <a href="/search/physics?searchtype=author&query=Bencze%2C+G">G. Bencze</a>, <a href="/search/physics?searchtype=author&query=Beni%2C+N">N. Beni</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">L. Benussi</a> , et al. (133 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1512.08481v1-abstract-short" style="display: inline;"> A novel approach which uses Fibre Bragg Grating (FBG) sensors has been utilised to assess and monitor the flatness of Gaseous Electron Multipliers (GEM) foils. The setup layout and preliminary results are presented. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1512.08481v1-abstract-full" style="display: none;"> A novel approach which uses Fibre Bragg Grating (FBG) sensors has been utilised to assess and monitor the flatness of Gaseous Electron Multipliers (GEM) foils. The setup layout and preliminary results are presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.08481v1-abstract-full').style.display = 'none'; document.getElementById('1512.08481v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 December, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Two pages, one figure. Presented by Luigi Benussi (corresponding author) to Elba 2015 conference</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Frascati Preprint INFN-15-09/LNF </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1412.0228">arXiv:1412.0228</a> <span> [<a href="https://arxiv.org/pdf/1412.0228">pdf</a>, <a href="https://arxiv.org/format/1412.0228">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Performance of a Large-Area GEM Detector Prototype for the Upgrade of the CMS Muon Endcap System </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Abbaneo%2C+D">D. Abbaneo</a>, <a href="/search/physics?searchtype=author&query=Abbas%2C+M">M. Abbas</a>, <a href="/search/physics?searchtype=author&query=Abbrescia%2C+M">M. Abbrescia</a>, <a href="/search/physics?searchtype=author&query=Abdelalim%2C+A+A">A. A. Abdelalim</a>, <a href="/search/physics?searchtype=author&query=Akl%2C+M+A">M. Abi Akl</a>, <a href="/search/physics?searchtype=author&query=Ahmed%2C+W">W. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Ahmed%2C+W">W. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Altieri%2C+P">P. Altieri</a>, <a href="/search/physics?searchtype=author&query=Aly%2C+R">R. Aly</a>, <a href="/search/physics?searchtype=author&query=Asawatangtrakuldee%2C+C">C. Asawatangtrakuldee</a>, <a href="/search/physics?searchtype=author&query=Ashfaq%2C+A">A. Ashfaq</a>, <a href="/search/physics?searchtype=author&query=Aspell%2C+P">P. Aspell</a>, <a href="/search/physics?searchtype=author&query=Assran%2C+Y">Y. Assran</a>, <a href="/search/physics?searchtype=author&query=Awan%2C+I">I. Awan</a>, <a href="/search/physics?searchtype=author&query=Bally%2C+S">S. Bally</a>, <a href="/search/physics?searchtype=author&query=Ban%2C+Y">Y. Ban</a>, <a href="/search/physics?searchtype=author&query=Banerjee%2C+S">S. Banerjee</a>, <a href="/search/physics?searchtype=author&query=Barria%2C+P">P. Barria</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">L. Benussi</a>, <a href="/search/physics?searchtype=author&query=Bhopatkar%2C+V">V. Bhopatkar</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">S. Bianco</a>, <a href="/search/physics?searchtype=author&query=Bos%2C+J">J. Bos</a>, <a href="/search/physics?searchtype=author&query=Bouhali%2C+O">O. Bouhali</a>, <a href="/search/physics?searchtype=author&query=Braibant%2C+S">S. Braibant</a>, <a href="/search/physics?searchtype=author&query=Buontempo%2C+S">S. Buontempo</a> , et al. (113 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1412.0228v2-abstract-short" style="display: inline;"> Gas Electron Multiplier (GEM) technology is being considered for the forward muon upgrade of the CMS experiment in Phase 2 of the CERN LHC. Its first implementation is planned for the GE1/1 system in the $1.5 < \mid畏\mid < 2.2$ region of the muon endcap mainly to control muon level-1 trigger rates after the second long LHC shutdown. A GE1/1 triple-GEM detector is read out by 3,072 radial strips wi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1412.0228v2-abstract-full').style.display = 'inline'; document.getElementById('1412.0228v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1412.0228v2-abstract-full" style="display: none;"> Gas Electron Multiplier (GEM) technology is being considered for the forward muon upgrade of the CMS experiment in Phase 2 of the CERN LHC. Its first implementation is planned for the GE1/1 system in the $1.5 < \mid畏\mid < 2.2$ region of the muon endcap mainly to control muon level-1 trigger rates after the second long LHC shutdown. A GE1/1 triple-GEM detector is read out by 3,072 radial strips with 455 $渭$rad pitch arranged in eight $畏$-sectors. We assembled a full-size GE1/1 prototype of 1m length at Florida Tech and tested it in 20-120 GeV hadron beams at Fermilab using Ar/CO$_{2}$ 70:30 and the RD51 scalable readout system. Four small GEM detectors with 2-D readout and an average measured azimuthal resolution of 36 $渭$rad provided precise reference tracks. Construction of this largest GEM detector built to-date is described. Strip cluster parameters, detection efficiency, and spatial resolution are studied with position and high voltage scans. The plateau detection efficiency is [97.1 $\pm$ 0.2 (stat)]\%. The azimuthal resolution is found to be [123.5 $\pm$ 1.6 (stat)] $渭$rad when operating in the center of the efficiency plateau and using full pulse height information. The resolution can be slightly improved by $\sim$ 10 $渭$rad when correcting for the bias due to discrete readout strips. The CMS upgrade design calls for readout electronics with binary hit output. When strip clusters are formed correspondingly without charge-weighting and with fixed hit thresholds, a position resolution of [136.8 $\pm$ 2.5 stat] $渭$rad is measured, consistent with the expected resolution of strip-pitch/$\sqrt{12}$ = 131.3 $渭$rad. Other $畏$-sectors of the detector show similar response and performance. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1412.0228v2-abstract-full').style.display = 'none'; document.getElementById('1412.0228v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 December, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 November, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 32 figures, submitted to Proc. 2014 IEEE Nucl. Sci. Symposium, Seattle, WA, reference added</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1405.0692">arXiv:1405.0692</a> <span> [<a href="https://arxiv.org/pdf/1405.0692">pdf</a>, <a href="https://arxiv.org/ps/1405.0692">ps</a>, <a href="https://arxiv.org/format/1405.0692">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Plasma Physics">physics.plasm-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1367-2630/16/1/013037">10.1088/1367-2630/16/1/013037 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> In situ electromagnetic field diagnostics with an electron plasma in a Penning-Malmberg trap </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Amole%2C+C">C. Amole</a>, <a href="/search/physics?searchtype=author&query=Ashkezari%2C+M+D">M. D. Ashkezari</a>, <a href="/search/physics?searchtype=author&query=Baquero-Ruiz%2C+M">M. Baquero-Ruiz</a>, <a href="/search/physics?searchtype=author&query=Bertsche%2C+W">W. Bertsche</a>, <a href="/search/physics?searchtype=author&query=Butler%2C+E">E. Butler</a>, <a href="/search/physics?searchtype=author&query=Capra%2C+A">A. Capra</a>, <a href="/search/physics?searchtype=author&query=Cesar%2C+C+L">C. L. Cesar</a>, <a href="/search/physics?searchtype=author&query=Charlton%2C+M">M. Charlton</a>, <a href="/search/physics?searchtype=author&query=Deller%2C+A">A. Deller</a>, <a href="/search/physics?searchtype=author&query=Evetts%2C+N">N. Evetts</a>, <a href="/search/physics?searchtype=author&query=Eriksson%2C+S">S. Eriksson</a>, <a href="/search/physics?searchtype=author&query=Fajans%2C+J">J. Fajans</a>, <a href="/search/physics?searchtype=author&query=Friesen%2C+T">T. Friesen</a>, <a href="/search/physics?searchtype=author&query=Fujiwara%2C+M+C">M. C. Fujiwara</a>, <a href="/search/physics?searchtype=author&query=Gill%2C+D+R">D. R. Gill</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+A">A. Gutierrez</a>, <a href="/search/physics?searchtype=author&query=Hangst%2C+J+S">J. S. Hangst</a>, <a href="/search/physics?searchtype=author&query=Hardy%2C+W+N">W. N. Hardy</a>, <a href="/search/physics?searchtype=author&query=Hayden%2C+M+E">M. E. Hayden</a>, <a href="/search/physics?searchtype=author&query=Isaac%2C+C+A">C. A. Isaac</a>, <a href="/search/physics?searchtype=author&query=Jonsell%2C+S">S. Jonsell</a>, <a href="/search/physics?searchtype=author&query=Kurchaninov%2C+L">L. Kurchaninov</a>, <a href="/search/physics?searchtype=author&query=Little%2C+A">A. Little</a>, <a href="/search/physics?searchtype=author&query=Madsen%2C+N">N. Madsen</a>, <a href="/search/physics?searchtype=author&query=McKenna%2C+J+T+K">J. T. K. McKenna</a> , et al. (15 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1405.0692v1-abstract-short" style="display: inline;"> We demonstrate a novel detection method for the cyclotron resonance frequency of an electron plasma in a Penning-Malmberg trap. With this technique, the electron plasma is used as an in situ diagnostic tool for measurement of the static magnetic field and the microwave electric field in the trap. The cyclotron motion of the electron plasma is excited by microwave radiation and the temperature chan… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1405.0692v1-abstract-full').style.display = 'inline'; document.getElementById('1405.0692v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1405.0692v1-abstract-full" style="display: none;"> We demonstrate a novel detection method for the cyclotron resonance frequency of an electron plasma in a Penning-Malmberg trap. With this technique, the electron plasma is used as an in situ diagnostic tool for measurement of the static magnetic field and the microwave electric field in the trap. The cyclotron motion of the electron plasma is excited by microwave radiation and the temperature change of the plasma is measured non-destructively by monitoring the plasma's quadrupole mode frequency. The spatially-resolved microwave electric field strength can be inferred from the plasma temperature change and the magnetic field is found through the cyclotron resonance frequency. These measurements were used extensively in the recently reported demonstration of resonant quantum interactions with antihydrogen. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1405.0692v1-abstract-full').style.display = 'none'; document.getElementById('1405.0692v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 May, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> New J. Phys. 16 013037 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1307.5288">arXiv:1307.5288</a> <span> [<a href="https://arxiv.org/pdf/1307.5288">pdf</a>, <a href="https://arxiv.org/format/1307.5288">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Physics at the CLIC e+e- Linear Collider -- Input to the Snowmass process 2013 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Abramowicz%2C+H">Halina Abramowicz</a>, <a href="/search/physics?searchtype=author&query=Abusleme%2C+A">Angel Abusleme</a>, <a href="/search/physics?searchtype=author&query=Afanaciev%2C+K">Konstatin Afanaciev</a>, <a href="/search/physics?searchtype=author&query=Alexander%2C+G">Gideon Alexander</a>, <a href="/search/physics?searchtype=author&query=Tehrani%2C+N+A">Niloufar Alipour Tehrani</a>, <a href="/search/physics?searchtype=author&query=Alonso%2C+O">Oscar Alonso</a>, <a href="/search/physics?searchtype=author&query=Andersen%2C+K+K">Kristoffer K. Andersen</a>, <a href="/search/physics?searchtype=author&query=Arfaoui%2C+S">Samir Arfaoui</a>, <a href="/search/physics?searchtype=author&query=Balazs%2C+C">Csaba Balazs</a>, <a href="/search/physics?searchtype=author&query=Barklow%2C+T">Tim Barklow</a>, <a href="/search/physics?searchtype=author&query=Battaglia%2C+M">Marco Battaglia</a>, <a href="/search/physics?searchtype=author&query=Benoit%2C+M">Mathieu Benoit</a>, <a href="/search/physics?searchtype=author&query=Bilki%2C+B">Burak Bilki</a>, <a href="/search/physics?searchtype=author&query=Blaising%2C+J">Jean-Jacques Blaising</a>, <a href="/search/physics?searchtype=author&query=Boland%2C+M">Mark Boland</a>, <a href="/search/physics?searchtype=author&query=Boronat%2C+M">Mar莽a Boronat</a>, <a href="/search/physics?searchtype=author&query=Jelisav%C4%8Di%C4%87%2C+I+B">Ivanka Bo啪ovi膰 Jelisav膷i膰</a>, <a href="/search/physics?searchtype=author&query=Burrows%2C+P">Philip Burrows</a>, <a href="/search/physics?searchtype=author&query=Chefdeville%2C+M">Maximilien Chefdeville</a>, <a href="/search/physics?searchtype=author&query=Contino%2C+R">Roberto Contino</a>, <a href="/search/physics?searchtype=author&query=Dannheim%2C+D">Dominik Dannheim</a>, <a href="/search/physics?searchtype=author&query=Demarteau%2C+M">Marcel Demarteau</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+M+A+D">Marco Aurelio Diaz Gutierrez</a>, <a href="/search/physics?searchtype=author&query=Di%C3%A9guez%2C+A">Angel Di茅guez</a>, <a href="/search/physics?searchtype=author&query=Campderros%2C+J+D">Jorge Duarte Campderros</a> , et al. (98 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1307.5288v3-abstract-short" style="display: inline;"> This paper summarizes the physics potential of the CLIC high-energy e+e- linear collider. It provides input to the Snowmass 2013 process for the energy-frontier working groups on The Higgs Boson (HE1), Precision Study of Electroweak Interactions (HE2), Fully Understanding the Top Quark (HE3), as well as The Path Beyond the Standard Model -- New Particles, Forces, and Dimensions (HE4). It is accomp… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1307.5288v3-abstract-full').style.display = 'inline'; document.getElementById('1307.5288v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1307.5288v3-abstract-full" style="display: none;"> This paper summarizes the physics potential of the CLIC high-energy e+e- linear collider. It provides input to the Snowmass 2013 process for the energy-frontier working groups on The Higgs Boson (HE1), Precision Study of Electroweak Interactions (HE2), Fully Understanding the Top Quark (HE3), as well as The Path Beyond the Standard Model -- New Particles, Forces, and Dimensions (HE4). It is accompanied by a paper describing the CLIC accelerator study, submitted to the Frontier Capabilities group of the Snowmass process. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1307.5288v3-abstract-full').style.display = 'none'; document.getElementById('1307.5288v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 September, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 July, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Updated the author list, updated Higgs results and small changes in the text of the Higgs section, updated results on composite Higgs bosons, added and updated references. Final submission for the Snowmass proceedings</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1211.3939">arXiv:1211.3939</a> <span> [<a href="https://arxiv.org/pdf/1211.3939">pdf</a>, <a href="https://arxiv.org/ps/1211.3939">ps</a>, <a href="https://arxiv.org/format/1211.3939">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Beam Test Results for New Full-scale GEM Prototypes for a Future Upgrade of the CMS High-eta Muon System </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Abbaneo%2C+D">D. Abbaneo</a>, <a href="/search/physics?searchtype=author&query=Abbrescia%2C+M">M. Abbrescia</a>, <a href="/search/physics?searchtype=author&query=Armagnaud%2C+C">C. Armagnaud</a>, <a href="/search/physics?searchtype=author&query=Aspell%2C+P">P. Aspell</a>, <a href="/search/physics?searchtype=author&query=Assran%2C+Y">Y. Assran</a>, <a href="/search/physics?searchtype=author&query=Ban%2C+Y">Y. Ban</a>, <a href="/search/physics?searchtype=author&query=Bally%2C+S">S. Bally</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">L. Benussi</a>, <a href="/search/physics?searchtype=author&query=Berzano%2C+U">U. Berzano</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">S. Bianco</a>, <a href="/search/physics?searchtype=author&query=Bos%2C+J">J. Bos</a>, <a href="/search/physics?searchtype=author&query=Bunkowski%2C+K">K. Bunkowski</a>, <a href="/search/physics?searchtype=author&query=Cai%2C+J">J. Cai</a>, <a href="/search/physics?searchtype=author&query=Chatelain%2C+J+P">J. P. Chatelain</a>, <a href="/search/physics?searchtype=author&query=Christiansen%2C+J">J. Christiansen</a>, <a href="/search/physics?searchtype=author&query=Colafranceschi%2C+S">S. Colafranceschi</a>, <a href="/search/physics?searchtype=author&query=Colaleo%2C+A">A. Colaleo</a>, <a href="/search/physics?searchtype=author&query=Garcia%2C+A+C">A. Conde Garcia</a>, <a href="/search/physics?searchtype=author&query=David%2C+E">E. David</a>, <a href="/search/physics?searchtype=author&query=de+Robertis%2C+G">G. de Robertis</a>, <a href="/search/physics?searchtype=author&query=De+Oliveira%2C+R">R. De Oliveira</a>, <a href="/search/physics?searchtype=author&query=Pinto%2C+S+D">S. Duarte Pinto</a>, <a href="/search/physics?searchtype=author&query=Ferry%2C+S">S. Ferry</a>, <a href="/search/physics?searchtype=author&query=Formenti%2C+F">F. Formenti</a>, <a href="/search/physics?searchtype=author&query=Franconi%2C+L">L. Franconi</a> , et al. (34 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1211.3939v1-abstract-short" style="display: inline;"> The CMS GEM collaboration is considering Gas Electron Multipliers (GEMs) for upgrading the CMS forward muon system in the 1.5<|eta|<2.4 endcap region. GEM detectors can provide precision tracking and fast trigger information. They would improve the CMS muon trigger and muon momentum resolution and provide missing redundancy in the high-eta region. Employing a new faster construction and assembly t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.3939v1-abstract-full').style.display = 'inline'; document.getElementById('1211.3939v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1211.3939v1-abstract-full" style="display: none;"> The CMS GEM collaboration is considering Gas Electron Multipliers (GEMs) for upgrading the CMS forward muon system in the 1.5<|eta|<2.4 endcap region. GEM detectors can provide precision tracking and fast trigger information. They would improve the CMS muon trigger and muon momentum resolution and provide missing redundancy in the high-eta region. Employing a new faster construction and assembly technique, we built four full-scale Triple-GEM muon detectors for the inner ring of the first muon endcap station. We plan to install these or further improved versions in CMS during the first long LHC shutdown in 2013/14 for continued testing. These detectors are designed for the stringent rate and resolution requirements in the increasingly hostile environments expected at CMS after the second long LHC shutdown in 2018/19. The new prototypes were studied in muon/pion beams at the CERN SPS. We discuss our experience with constructing the new full-scale production prototypes and present preliminary performance results from the beam test. We also tested smaller Triple-GEM prototypes with zigzag readout strips with 2 mm pitch in these beams and measured a spatial resolution of 73 microns. This readout offers a potential reduction of channel count and consequently electronics cost for this system while maintaining high spatial resolution. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.3939v1-abstract-full').style.display = 'none'; document.getElementById('1211.3939v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 November, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 9 figures, submitted to Proc. 2012 IEEE Nucl. Sci. Symposium, Anaheim, CA</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1201.3944">arXiv:1201.3944</a> <span> [<a href="https://arxiv.org/pdf/1201.3944">pdf</a>, <a href="https://arxiv.org/format/1201.3944">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Plasma Physics">physics.plasm-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1367-2630/14/1/015010.">10.1088/1367-2630/14/1/015010. <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Antihydrogen and mirror-trapped antiproton discrimination: Discriminating between antihydrogen and mirror-trapped antiprotons in a minimum-B trap </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Amole%2C+C">C. Amole</a>, <a href="/search/physics?searchtype=author&query=Andresen%2C+G+B">G. B. Andresen</a>, <a href="/search/physics?searchtype=author&query=Ashkezari%2C+M+D">M. D. Ashkezari</a>, <a href="/search/physics?searchtype=author&query=Baquero-Ruiz%2C+M">M. Baquero-Ruiz</a>, <a href="/search/physics?searchtype=author&query=Bertsche%2C+W">W. Bertsche</a>, <a href="/search/physics?searchtype=author&query=Butler%2C+E">E. Butler</a>, <a href="/search/physics?searchtype=author&query=Cesar%2C+C+L">C. L. Cesar</a>, <a href="/search/physics?searchtype=author&query=Chapman%2C+S">S. Chapman</a>, <a href="/search/physics?searchtype=author&query=Charlton%2C+M">M. Charlton</a>, <a href="/search/physics?searchtype=author&query=Deller%2C+A">A. Deller</a>, <a href="/search/physics?searchtype=author&query=Eriksson%2C+S">S. Eriksson</a>, <a href="/search/physics?searchtype=author&query=Fajans%2C+J">J. Fajans</a>, <a href="/search/physics?searchtype=author&query=Friesen%2C+T">T. Friesen</a>, <a href="/search/physics?searchtype=author&query=Fujiwara%2C+M+C">M. C. Fujiwara</a>, <a href="/search/physics?searchtype=author&query=Gill%2C+D+R">D. R. Gill</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+A">A. Gutierrez</a>, <a href="/search/physics?searchtype=author&query=Hangst%2C+J+S">J. S. Hangst</a>, <a href="/search/physics?searchtype=author&query=Hardy%2C+W+N">W. N. Hardy</a>, <a href="/search/physics?searchtype=author&query=Hayden%2C+M+E">M. E. Hayden</a>, <a href="/search/physics?searchtype=author&query=Humphries%2C+A+J">A. J. Humphries</a>, <a href="/search/physics?searchtype=author&query=Hydomako%2C+R">R. Hydomako</a>, <a href="/search/physics?searchtype=author&query=Kurchaninov%2C+L">L. Kurchaninov</a>, <a href="/search/physics?searchtype=author&query=Jonsell%2C+S">S. Jonsell</a>, <a href="/search/physics?searchtype=author&query=Madsen%2C+N">N. Madsen</a>, <a href="/search/physics?searchtype=author&query=Menary%2C+S">S. Menary</a> , et al. (13 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1201.3944v1-abstract-short" style="display: inline;"> Recently, antihydrogen atoms were trapped at CERN in a magnetic minimum (minimum-B) trap formed by superconducting octupole and mirror magnet coils. The trapped antiatoms were detected by rapidly turning off these magnets, thereby eliminating the magnetic minimum and releasing any antiatoms contained in the trap. Once released, these antiatoms quickly hit the trap wall, whereupon the positrons and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1201.3944v1-abstract-full').style.display = 'inline'; document.getElementById('1201.3944v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1201.3944v1-abstract-full" style="display: none;"> Recently, antihydrogen atoms were trapped at CERN in a magnetic minimum (minimum-B) trap formed by superconducting octupole and mirror magnet coils. The trapped antiatoms were detected by rapidly turning off these magnets, thereby eliminating the magnetic minimum and releasing any antiatoms contained in the trap. Once released, these antiatoms quickly hit the trap wall, whereupon the positrons and antiprotons in the antiatoms annihilated. The antiproton annihilations produce easily detected signals; we used these signals to prove that we trapped antihydrogen. However, our technique could be confounded by mirror-trapped antiprotons, which would produce seemingly-identical annihilation signals upon hitting the trap wall. In this paper, we discuss possible sources of mirror-trapped antiprotons and show that antihydrogen and antiprotons can be readily distinguished, often with the aid of applied electric fields, by analyzing the annihilation locations and times. We further discuss the general properties of antiproton and antihydrogen trajectories in this magnetic geometry, and reconstruct the antihydrogen energy distribution from the measured annihilation time history. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1201.3944v1-abstract-full').style.display = 'none'; document.getElementById('1201.3944v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 January, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">17 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> New J. Phys., 14 015010, 2012 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1111.7249">arXiv:1111.7249</a> <span> [<a href="https://arxiv.org/pdf/1111.7249">pdf</a>, <a href="https://arxiv.org/ps/1111.7249">ps</a>, <a href="https://arxiv.org/format/1111.7249">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1109/NSSMIC.2011.6154312">10.1109/NSSMIC.2011.6154312 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Construction and Performance of Large-Area Triple-GEM Prototypes for Future Upgrades of the CMS Forward Muon System </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Tytgat%2C+M">M. Tytgat</a>, <a href="/search/physics?searchtype=author&query=Marinov%2C+A">A. Marinov</a>, <a href="/search/physics?searchtype=author&query=Zaganidis%2C+N">N. Zaganidis</a>, <a href="/search/physics?searchtype=author&query=Ban%2C+Y">Y. Ban</a>, <a href="/search/physics?searchtype=author&query=Cai%2C+J">J. Cai</a>, <a href="/search/physics?searchtype=author&query=Teng%2C+H">H. Teng</a>, <a href="/search/physics?searchtype=author&query=Mohapatra%2C+A">A. Mohapatra</a>, <a href="/search/physics?searchtype=author&query=Moulik%2C+T">T. Moulik</a>, <a href="/search/physics?searchtype=author&query=Abbrescia%2C+M">M. Abbrescia</a>, <a href="/search/physics?searchtype=author&query=Colaleo%2C+A">A. Colaleo</a>, <a href="/search/physics?searchtype=author&query=de+Robertis%2C+G">G. de Robertis</a>, <a href="/search/physics?searchtype=author&query=Loddo%2C+F">F. Loddo</a>, <a href="/search/physics?searchtype=author&query=Maggi%2C+M">M. Maggi</a>, <a href="/search/physics?searchtype=author&query=Nuzzo%2C+S">S. Nuzzo</a>, <a href="/search/physics?searchtype=author&query=Tupputi%2C+S+A">S. A. Tupputi</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">L. Benussi</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">S. Bianco</a>, <a href="/search/physics?searchtype=author&query=Colafranceschi%2C+S">S. Colafranceschi</a>, <a href="/search/physics?searchtype=author&query=Piccolo%2C+D">D. Piccolo</a>, <a href="/search/physics?searchtype=author&query=Raffone%2C+G">G. Raffone</a>, <a href="/search/physics?searchtype=author&query=Saviano%2C+G">G. Saviano</a>, <a href="/search/physics?searchtype=author&query=Bagliesi%2C+M+G">M. G. Bagliesi</a>, <a href="/search/physics?searchtype=author&query=Cecchi%2C+R">R. Cecchi</a>, <a href="/search/physics?searchtype=author&query=Magazzu%2C+G">G. Magazzu</a>, <a href="/search/physics?searchtype=author&query=Oliveri%2C+E">E. Oliveri</a> , et al. (34 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1111.7249v1-abstract-short" style="display: inline;"> At present, part of the forward RPC muon system of the CMS detector at the CERN LHC remains uninstrumented in the high-畏region. An international collaboration is investigating the possibility of covering the 1.6 < |畏| < 2.4 region of the muon endcaps with large-area triple-GEM detectors. Given their good spatial resolution, high rate capability, and radiation hardness, these micro-pattern gas dete… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1111.7249v1-abstract-full').style.display = 'inline'; document.getElementById('1111.7249v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1111.7249v1-abstract-full" style="display: none;"> At present, part of the forward RPC muon system of the CMS detector at the CERN LHC remains uninstrumented in the high-畏region. An international collaboration is investigating the possibility of covering the 1.6 < |畏| < 2.4 region of the muon endcaps with large-area triple-GEM detectors. Given their good spatial resolution, high rate capability, and radiation hardness, these micro-pattern gas detectors are an appealing option for simultaneously enhancing muon tracking and triggering capabilities in a future upgrade of the CMS detector. A general overview of this feasibility study will be presented. The design and construction of small (10\times10 cm2) and full-size trapezoidal (1\times0.5 m2) triple-GEM prototypes will be described. During detector assembly, different techniques for stretching the GEM foils were tested. Results from measurements with x-rays and from test beam campaigns at the CERN SPS will be shown for the small and large prototypes. Preliminary simulation studies on the expected muon reconstruction and trigger performances of this proposed upgraded muon system will be reported. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1111.7249v1-abstract-full').style.display = 'none'; document.getElementById('1111.7249v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 November, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 25 figures, submitted for publication in conference record of the 2011 IEEE Nuclear Science Symposium, Valencia, Spain</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> RD51-Note-2011-012 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1111.4883">arXiv:1111.4883</a> <span> [<a href="https://arxiv.org/pdf/1111.4883">pdf</a>, <a href="https://arxiv.org/ps/1111.4883">ps</a>, <a href="https://arxiv.org/format/1111.4883">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Test beam results of the GE1/1 prototype for a future upgrade of the CMS high-$畏$ muon system </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Abbaneo%2C+D">D. Abbaneo</a>, <a href="/search/physics?searchtype=author&query=Abbrescia%2C+M">M. Abbrescia</a>, <a href="/search/physics?searchtype=author&query=Armagnaud%2C+C">C. Armagnaud</a>, <a href="/search/physics?searchtype=author&query=Aspell%2C+P">P. Aspell</a>, <a href="/search/physics?searchtype=author&query=Bagliesi%2C+M+G">M. G. Bagliesi</a>, <a href="/search/physics?searchtype=author&query=Ban%2C+Y">Y. Ban</a>, <a href="/search/physics?searchtype=author&query=Bally%2C+S">S. Bally</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">L. Benussi</a>, <a href="/search/physics?searchtype=author&query=Berzano%2C+U">U. Berzano</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">S. Bianco</a>, <a href="/search/physics?searchtype=author&query=Bos%2C+J">J. Bos</a>, <a href="/search/physics?searchtype=author&query=Bunkowski%2C+K">K. Bunkowski</a>, <a href="/search/physics?searchtype=author&query=Cai%2C+J">J. Cai</a>, <a href="/search/physics?searchtype=author&query=Cecchi%2C+R">R. Cecchi</a>, <a href="/search/physics?searchtype=author&query=Chatelain%2C+J+P">J. P. Chatelain</a>, <a href="/search/physics?searchtype=author&query=Christiansen%2C+J">J. Christiansen</a>, <a href="/search/physics?searchtype=author&query=Colafranceschi%2C+S">S. Colafranceschi</a>, <a href="/search/physics?searchtype=author&query=Colaleo%2C+A">A. Colaleo</a>, <a href="/search/physics?searchtype=author&query=Garcia%2C+A+C">A. Conde Garcia</a>, <a href="/search/physics?searchtype=author&query=David%2C+E">E. David</a>, <a href="/search/physics?searchtype=author&query=de+Robertis%2C+G">G. de Robertis</a>, <a href="/search/physics?searchtype=author&query=De+Oliveira%2C+R">R. De Oliveira</a>, <a href="/search/physics?searchtype=author&query=Pinto%2C+S+D">S. Duarte Pinto</a>, <a href="/search/physics?searchtype=author&query=Ferry%2C+S">S. Ferry</a>, <a href="/search/physics?searchtype=author&query=Formenti%2C+F">F. Formenti</a> , et al. (33 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1111.4883v4-abstract-short" style="display: inline;"> Gas Electron Multipliers (GEM) are an interesting technology under consideration for the future upgrade of the forward region of the CMS muon system, specifically in the $1.6<| 畏|<2.4$ endcap region. With a sufficiently fine segmentation GEMs can provide precision tracking as well as fast trigger information. The main objective is to contribute to the improvement of the CMS muon trigger. The const… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1111.4883v4-abstract-full').style.display = 'inline'; document.getElementById('1111.4883v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1111.4883v4-abstract-full" style="display: none;"> Gas Electron Multipliers (GEM) are an interesting technology under consideration for the future upgrade of the forward region of the CMS muon system, specifically in the $1.6<| 畏|<2.4$ endcap region. With a sufficiently fine segmentation GEMs can provide precision tracking as well as fast trigger information. The main objective is to contribute to the improvement of the CMS muon trigger. The construction of large-area GEM detectors is challenging both from the technological and production aspects. In view of the CMS upgrade we have designed and built the largest full-size Triple-GEM muon detector, which is able to meet the stringent requirements given the hostile environment at the high-luminosity LHC. Measurements were performed during several test beam campaigns at the CERN SPS in 2010 and 2011. The main issues under study are efficiency, spatial resolution and timing performance with different inter-electrode gap configurations and gas mixtures. In this paper results of the performance of the prototypes at the beam tests will be discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1111.4883v4-abstract-full').style.display = 'none'; document.getElementById('1111.4883v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 November, 2011; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 November, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2011. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1110.2866">arXiv:1110.2866</a> <span> [<a href="https://arxiv.org/pdf/1110.2866">pdf</a>, <a href="https://arxiv.org/format/1110.2866">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/7/01/P01010">10.1088/1748-0221/7/01/P01010 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Absolute luminosity measurements with the LHCb detector at the LHC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=The+LHCb+Collaboration"> The LHCb Collaboration</a>, <a href="/search/physics?searchtype=author&query=Aaij%2C+R">R. Aaij</a>, <a href="/search/physics?searchtype=author&query=Adeva%2C+B">B. Adeva</a>, <a href="/search/physics?searchtype=author&query=Adinolfi%2C+M">M. Adinolfi</a>, <a href="/search/physics?searchtype=author&query=Adrover%2C+C">C. Adrover</a>, <a href="/search/physics?searchtype=author&query=Affolder%2C+A">A. Affolder</a>, <a href="/search/physics?searchtype=author&query=Ajaltouni%2C+Z">Z. Ajaltouni</a>, <a href="/search/physics?searchtype=author&query=Albrecht%2C+J">J. Albrecht</a>, <a href="/search/physics?searchtype=author&query=Alessio%2C+F">F. Alessio</a>, <a href="/search/physics?searchtype=author&query=Alexander%2C+M">M. Alexander</a>, <a href="/search/physics?searchtype=author&query=Alkhazov%2C+G">G. Alkhazov</a>, <a href="/search/physics?searchtype=author&query=Cartelle%2C+P+A">P. Alvarez Cartelle</a>, <a href="/search/physics?searchtype=author&query=Alves%2C+A+A">A. A. Alves Jr</a>, <a href="/search/physics?searchtype=author&query=Amato%2C+S">S. Amato</a>, <a href="/search/physics?searchtype=author&query=Amhis%2C+Y">Y. Amhis</a>, <a href="/search/physics?searchtype=author&query=Anderson%2C+J">J. Anderson</a>, <a href="/search/physics?searchtype=author&query=Appleby%2C+R+B">R. B. Appleby</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+O+A">O. Aquines Gutierrez</a>, <a href="/search/physics?searchtype=author&query=Archilli%2C+F">F. Archilli</a>, <a href="/search/physics?searchtype=author&query=Arrabito%2C+L">L. Arrabito</a>, <a href="/search/physics?searchtype=author&query=Artamonov%2C+A">A. Artamonov</a>, <a href="/search/physics?searchtype=author&query=Artuso%2C+M">M. Artuso</a>, <a href="/search/physics?searchtype=author&query=Aslanides%2C+E">E. Aslanides</a>, <a href="/search/physics?searchtype=author&query=Auriemma%2C+G">G. Auriemma</a>, <a href="/search/physics?searchtype=author&query=Bachmann%2C+S">S. Bachmann</a> , et al. (549 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1110.2866v2-abstract-short" style="display: inline;"> Absolute luminosity measurements are of general interest for colliding-beam experiments at storage rings. These measurements are necessary to determine the absolute cross-sections of reaction processes and are valuable to quantify the performance of the accelerator. Using data taken in 2010, LHCb has applied two methods to determine the absolute scale of its luminosity measurements for proton-prot… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1110.2866v2-abstract-full').style.display = 'inline'; document.getElementById('1110.2866v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1110.2866v2-abstract-full" style="display: none;"> Absolute luminosity measurements are of general interest for colliding-beam experiments at storage rings. These measurements are necessary to determine the absolute cross-sections of reaction processes and are valuable to quantify the performance of the accelerator. Using data taken in 2010, LHCb has applied two methods to determine the absolute scale of its luminosity measurements for proton-proton collisions at the LHC with a centre-of-mass energy of 7 TeV. In addition to the classic "van der Meer scan" method a novel technique has been developed which makes use of direct imaging of the individual beams using beam-gas and beam-beam interactions. This beam imaging method is made possible by the high resolution of the LHCb vertex detector and the close proximity of the detector to the beams, and allows beam parameters such as positions, angles and widths to be determined. The results of the two methods have comparable precision and are in good agreement. Combining the two methods, an overall precision of 3.5% in the absolute luminosity determination is reached. The techniques used to transport the absolute luminosity calibration to the full 2010 data-taking period are presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1110.2866v2-abstract-full').style.display = 'none'; document.getElementById('1110.2866v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 January, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 October, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">48 pages, 19 figures. Results unchanged, improved clarity of Table 6, 9 and 10 and corresponding explanation in the text</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> LHCb-PAPER-2011-015; CERN-PH-EP-2011-157 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> 2012 JINST 7 P01010 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1104.4982">arXiv:1104.4982</a> <span> [<a href="https://arxiv.org/pdf/1104.4982">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Plasma Physics">physics.plasm-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/nphys2025">10.1038/nphys2025 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Confinement of antihydrogen for 1000 seconds </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=ALPHA+Collaboration"> ALPHA Collaboration</a>, <a href="/search/physics?searchtype=author&query=Andresen%2C+G+B">G. B. Andresen</a>, <a href="/search/physics?searchtype=author&query=Ashkezari%2C+M+D">M. D. Ashkezari</a>, <a href="/search/physics?searchtype=author&query=Baquero-Ruiz%2C+M">M. Baquero-Ruiz</a>, <a href="/search/physics?searchtype=author&query=Bertsche%2C+W">W. Bertsche</a>, <a href="/search/physics?searchtype=author&query=Butler%2C+E">E. Butler</a>, <a href="/search/physics?searchtype=author&query=Cesar%2C+C+L">C. L. Cesar</a>, <a href="/search/physics?searchtype=author&query=Deller%2C+A">A. Deller</a>, <a href="/search/physics?searchtype=author&query=Eriksson%2C+S">S. Eriksson</a>, <a href="/search/physics?searchtype=author&query=Fajans%2C+J">J. Fajans</a>, <a href="/search/physics?searchtype=author&query=Friesen%2C+T">T. Friesen</a>, <a href="/search/physics?searchtype=author&query=Fujiwara%2C+M+C">M. C. Fujiwara</a>, <a href="/search/physics?searchtype=author&query=Gill%2C+D+R">D. R. Gill</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+A">A. Gutierrez</a>, <a href="/search/physics?searchtype=author&query=Hangst%2C+J+S">J. S. Hangst</a>, <a href="/search/physics?searchtype=author&query=Hardy%2C+W+N">W. N. Hardy</a>, <a href="/search/physics?searchtype=author&query=Hayano%2C+R+S">R. S. Hayano</a>, <a href="/search/physics?searchtype=author&query=Hayden%2C+M+E">M. E. Hayden</a>, <a href="/search/physics?searchtype=author&query=Humphries%2C+A+J">A. J. Humphries</a>, <a href="/search/physics?searchtype=author&query=Hydomako%2C+R">R. Hydomako</a>, <a href="/search/physics?searchtype=author&query=Jonsell%2C+S">S. Jonsell</a>, <a href="/search/physics?searchtype=author&query=Kemp%2C+S">S. Kemp</a>, <a href="/search/physics?searchtype=author&query=Kurchaninov%2C+L">L. Kurchaninov</a>, <a href="/search/physics?searchtype=author&query=Madsen%2C+N">N. Madsen</a>, <a href="/search/physics?searchtype=author&query=Menary%2C+S">S. Menary</a> , et al. (14 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1104.4982v1-abstract-short" style="display: inline;"> Atoms made of a particle and an antiparticle are unstable, usually surviving less than a microsecond. Antihydrogen, made entirely of antiparticles, is believed to be stable, and it is this longevity that holds the promise of precision studies of matter-antimatter symmetry. We have recently demonstrated trapping of antihydrogen atoms by releasing them after a confinement time of 172 ms. A critical… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1104.4982v1-abstract-full').style.display = 'inline'; document.getElementById('1104.4982v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1104.4982v1-abstract-full" style="display: none;"> Atoms made of a particle and an antiparticle are unstable, usually surviving less than a microsecond. Antihydrogen, made entirely of antiparticles, is believed to be stable, and it is this longevity that holds the promise of precision studies of matter-antimatter symmetry. We have recently demonstrated trapping of antihydrogen atoms by releasing them after a confinement time of 172 ms. A critical question for future studies is: how long can anti-atoms be trapped? Here we report the observation of anti-atom confinement for 1000 s, extending our earlier results by nearly four orders of magnitude. Our calculations indicate that most of the trapped anti-atoms reach the ground state. Further, we report the first measurement of the energy distribution of trapped antihydrogen which, coupled with detailed comparisons with simulations, provides a key tool for the systematic investigation of trapping dynamics. These advances open up a range of experimental possibilities, including precision studies of CPT symmetry and cooling to temperatures where gravitational effects could become apparent. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1104.4982v1-abstract-full').style.display = 'none'; document.getElementById('1104.4982v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 April, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">30 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> TRI-PP-11-02 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature Phys.7:558-564,2011 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1104.4841">arXiv:1104.4841</a> <span> [<a href="https://arxiv.org/pdf/1104.4841">pdf</a>, <a href="https://arxiv.org/format/1104.4841">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Plasma Physics">physics.plasm-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.106.145001">10.1103/PhysRevLett.106.145001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Centrifugal separation and equilibration dynamics in an electron-antiproton plasma </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Andresen%2C+G+B">G. B. Andresen</a>, <a href="/search/physics?searchtype=author&query=Ashkezari%2C+M+D">M. D. Ashkezari</a>, <a href="/search/physics?searchtype=author&query=Baquero-Ruiz%2C+M">M. Baquero-Ruiz</a>, <a href="/search/physics?searchtype=author&query=Bertsche%2C+W">W. Bertsche</a>, <a href="/search/physics?searchtype=author&query=Bowe%2C+P+D">P. D. Bowe</a>, <a href="/search/physics?searchtype=author&query=Butler%2C+E">E. Butler</a>, <a href="/search/physics?searchtype=author&query=Cesar%2C+C+L">C. L. Cesar</a>, <a href="/search/physics?searchtype=author&query=Chapman%2C+S">S. Chapman</a>, <a href="/search/physics?searchtype=author&query=Charlton%2C+M">M. Charlton</a>, <a href="/search/physics?searchtype=author&query=Deller%2C+A">A. Deller</a>, <a href="/search/physics?searchtype=author&query=Eriksson%2C+S">S. Eriksson</a>, <a href="/search/physics?searchtype=author&query=Fajans%2C+J">J. Fajans</a>, <a href="/search/physics?searchtype=author&query=Friesen%2C+T">T. Friesen</a>, <a href="/search/physics?searchtype=author&query=Fujiwara%2C+M+C">M. C. Fujiwara</a>, <a href="/search/physics?searchtype=author&query=Gill%2C+D+R">D. R. Gill</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+A">A. Gutierrez</a>, <a href="/search/physics?searchtype=author&query=Hangst%2C+J+S">J. S. Hangst</a>, <a href="/search/physics?searchtype=author&query=Hardy%2C+W+N">W. N. Hardy</a>, <a href="/search/physics?searchtype=author&query=Hayden%2C+M+E">M. E. Hayden</a>, <a href="/search/physics?searchtype=author&query=Humphries%2C+A+J">A. J. Humphries</a>, <a href="/search/physics?searchtype=author&query=Hydomako%2C+R">R. Hydomako</a>, <a href="/search/physics?searchtype=author&query=Jonsell%2C+S">S. Jonsell</a>, <a href="/search/physics?searchtype=author&query=Madsen%2C+N">N. Madsen</a>, <a href="/search/physics?searchtype=author&query=Menary%2C+S">S. Menary</a>, <a href="/search/physics?searchtype=author&query=Nolan%2C+P">P. Nolan</a> , et al. (12 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1104.4841v1-abstract-short" style="display: inline;"> Charges in cold, multiple-species, non-neutral plasmas separate radially by mass, forming centrifugally-separated states. Here, we report the first detailed measurements of such states in an electron-antiproton plasma, and the first observations of the separation dynamics in any centrifugally-separated system. While the observed equilibrium states are expected and in agreement with theory, the equ… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1104.4841v1-abstract-full').style.display = 'inline'; document.getElementById('1104.4841v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1104.4841v1-abstract-full" style="display: none;"> Charges in cold, multiple-species, non-neutral plasmas separate radially by mass, forming centrifugally-separated states. Here, we report the first detailed measurements of such states in an electron-antiproton plasma, and the first observations of the separation dynamics in any centrifugally-separated system. While the observed equilibrium states are expected and in agreement with theory, the equilibration time is approximately constant over a wide range of parameters, a surprising and as yet unexplained result. Electron-antiproton plasmas play a crucial role in antihydrogen trapping experiments. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1104.4841v1-abstract-full').style.display = 'none'; document.getElementById('1104.4841v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 April, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett., 106 145001, (2011) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0905.4096">arXiv:0905.4096</a> <span> [<a href="https://arxiv.org/pdf/0905.4096">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Physics and Society">physics.soc-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Statistical Mechanics">cond-mat.stat-mech</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1742-5468/2008/03/P03008">10.1088/1742-5468/2008/03/P03008 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> "Clumpiness" Mixing in Complex Networks </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Estrada%2C+E">Ernesto Estrada</a>, <a href="/search/physics?searchtype=author&query=Hatano%2C+N">Naomichi Hatano</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+A">Amauri Gutierrez</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="0905.4096v1-abstract-short" style="display: inline;"> Three measures of clumpiness of complex networks are introduced. The measures quantify how most central nodes of a network are clumped together. The assortativity coefficient defined in a previous study measures a similar characteristic, but accounts only for the clumpiness of the central nodes that are directly connected to each other. The clumpiness coefficient defined in the present paper als… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0905.4096v1-abstract-full').style.display = 'inline'; document.getElementById('0905.4096v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0905.4096v1-abstract-full" style="display: none;"> Three measures of clumpiness of complex networks are introduced. The measures quantify how most central nodes of a network are clumped together. The assortativity coefficient defined in a previous study measures a similar characteristic, but accounts only for the clumpiness of the central nodes that are directly connected to each other. The clumpiness coefficient defined in the present paper also takes into account the cases where central nodes are separated by a few links. The definition is based on the node degrees and the distances between pairs of nodes. The clumpiness coefficient together with the assortativity coefficient can define four classes of network. Numerical calculations demonstrate that the classification scheme successfully categorizes 30 real-world networks into the four classes: clumped assortative, clumped disassortative, loose assortative and loose disassortative networks. The clumpiness coefficient also differentiates the Erdos-Renyi model from the Barabasi-Albert model, which the assortativity coefficient could not differentiate. In addition, the bounds of the clumpiness coefficient as well as the relationships between the three measures of clumpiness are discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0905.4096v1-abstract-full').style.display = 'none'; document.getElementById('0905.4096v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 May, 2009; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2009. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">47 pages, 11 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. Stat. Mech. Theor. Exp. (2008) P03008 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/physics/0503102">arXiv:physics/0503102</a> <span> [<a href="https://arxiv.org/pdf/physics/0503102">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Physics Education">physics.ed-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="History and Philosophy of Physics">physics.hist-ph</span> </div> </div> <p class="title is-5 mathjax"> La aventura de la fisica </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Chubykalo%2C+A">Andrey Chubykalo</a>, <a href="/search/physics?searchtype=author&query=Dvoeglazov%2C+V">Valeri Dvoeglazov</a>, <a href="/search/physics?searchtype=author&query=Espinoza%2C+A">Augusto Espinoza</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+A">Alejandro Gutierrez</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="physics/0503102v1-abstract-short" style="display: inline;"> Con la intencion de realizar una pequena aportacion en la celebracion del ano 2005, proclamado como Ano Internacional de la Fisica, el cuerpo academico de Particulas, Campos y Astrofisica de la Universidad Autonoma de Zacatecas presenta un pequeno esbozo de los trabajos realizados por Einstein en 1905, asi como un conjunto de ensayos sobre electrodinamica clasica, el grupo de Lorentz, neutrinos… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/0503102v1-abstract-full').style.display = 'inline'; document.getElementById('physics/0503102v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="physics/0503102v1-abstract-full" style="display: none;"> Con la intencion de realizar una pequena aportacion en la celebracion del ano 2005, proclamado como Ano Internacional de la Fisica, el cuerpo academico de Particulas, Campos y Astrofisica de la Universidad Autonoma de Zacatecas presenta un pequeno esbozo de los trabajos realizados por Einstein en 1905, asi como un conjunto de ensayos sobre electrodinamica clasica, el grupo de Lorentz, neutrinos y relatividad general, todos estos relacionados con los temas de investigacion que realizamos. ----- The Astrophysics, Particles and Fields Unit of the Zacatecas University presents a brief essay of the Einstein historical works (1905) and a set of essays on modern development in the classical electrodynamics, the Lorentz group, neutrinos and the general relativity. The aim is to contribute to the special issue of the UAEM Journal, which is dedicated to the International Year of Physics. The corresponding topics of the article are related to the research work of the authors. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/0503102v1-abstract-full').style.display = 'none'; document.getElementById('physics/0503102v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 March, 2005; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2005. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">14 pages, no figures, PDF file, to be published in a special issue of the UAEM Journal (Mexico) dedicated to the International Year of Physics</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Ciencia Ergo Sum (UAEM), v. 13, No. 3 (2006) 271-280 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/physics/9812018">arXiv:physics/9812018</a> <span> [<a href="https://arxiv.org/pdf/physics/9812018">pdf</a>, <a href="https://arxiv.org/ps/physics/9812018">ps</a>, <a href="https://arxiv.org/format/physics/9812018">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1109/23.775501">10.1109/23.775501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Design and Operation of Front-End Electronics for the HERA-B Muon Detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Buchler%2C+M">M. Buchler</a>, <a href="/search/physics?searchtype=author&query=Funk%2C+W">W. Funk</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+A">A. Gutierrez</a>, <a href="/search/physics?searchtype=author&query=Harr%2C+R+F">R. F. Harr</a>, <a href="/search/physics?searchtype=author&query=Karchin%2C+P+E">P. E. Karchin</a>, <a href="/search/physics?searchtype=author&query=Liu%2C+P">P. Liu</a>, <a href="/search/physics?searchtype=author&query=Nam%2C+S">S. Nam</a>, <a href="/search/physics?searchtype=author&query=Shiu%2C+J+G">J. G. Shiu</a>, <a href="/search/physics?searchtype=author&query=Takach%2C+S+F">S. F. Takach</a>, <a href="/search/physics?searchtype=author&query=Atiya%2C+M">M. Atiya</a>, <a href="/search/physics?searchtype=author&query=Padrazo%2C+D">D. Padrazo</a>, <a href="/search/physics?searchtype=author&query=Arefiev%2C+A">A. Arefiev</a>, <a href="/search/physics?searchtype=author&query=Barsuk%2C+S">S. Barsuk</a>, <a href="/search/physics?searchtype=author&query=Khasanov%2C+F">F. Khasanov</a>, <a href="/search/physics?searchtype=author&query=Laptin%2C+L">L. Laptin</a>, <a href="/search/physics?searchtype=author&query=Tchoudakov%2C+V">V. Tchoudakov</a>, <a href="/search/physics?searchtype=author&query=Tichimirov%2C+I">I. Tichimirov</a>, <a href="/search/physics?searchtype=author&query=Titov%2C+M">M. Titov</a>, <a href="/search/physics?searchtype=author&query=Zaitsev%2C+Y">Y. Zaitsev</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="physics/9812018v1-abstract-short" style="display: inline;"> We have implemented a cost-effective design for the readout electronics of both the anode wires and the cathode pads of large area proportional wire chambers for the HERA-B muon system based on the ASD-08 integrated circuit. To control and monitor the large number of readout channels, we have built a distributed control system based on Philips Semiconductors' I2C bus and microcontrollers. To dat… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/9812018v1-abstract-full').style.display = 'inline'; document.getElementById('physics/9812018v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="physics/9812018v1-abstract-full" style="display: none;"> We have implemented a cost-effective design for the readout electronics of both the anode wires and the cathode pads of large area proportional wire chambers for the HERA-B muon system based on the ASD-08 integrated circuit. To control and monitor the large number of readout channels, we have built a distributed control system based on Philips Semiconductors' I2C bus and microcontrollers. To date we have installed about 10800 channels of muon chambers and electronics. The average single channel noise occupancy is less than 10**-5, and the detectors have been operated with target interaction rates as high as 70 MHz. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/9812018v1-abstract-full').style.display = 'none'; document.getElementById('physics/9812018v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 December, 1998; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 1998. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 13 figures; submitted to IEEE Transactions on Nuclear Science; to appear in Conference Record of 1998 IEEE NSS in Toronto</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> IEEE Trans.Nucl.Sci.46:126-132,1999 </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact arXiv</title><desc>Click here to contact arXiv</desc><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 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