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<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/2406.11937">arXiv:2406.11937</a> <span> [<a href="https://arxiv.org/pdf/2406.11937">pdf</a>, <a href="https://arxiv.org/format/2406.11937">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> <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/10.1088/1748-0221/19/11/P11025">10.1088/1748-0221/19/11/P11025 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Using graph neural networks to reconstruct charged pion showers in the CMS High Granularity Calorimeter </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Aamir%2C+M">M. Aamir</a>, <a href="/search/physics?searchtype=author&query=Adamov%2C+G">G. Adamov</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+T">T. Adams</a>, <a href="/search/physics?searchtype=author&query=Adloff%2C+C">C. Adloff</a>, <a href="/search/physics?searchtype=author&query=Afanasiev%2C+S">S. Afanasiev</a>, <a href="/search/physics?searchtype=author&query=Agrawal%2C+C">C. Agrawal</a>, <a href="/search/physics?searchtype=author&query=Agrawal%2C+C">C. Agrawal</a>, <a href="/search/physics?searchtype=author&query=Ahmad%2C+A">A. Ahmad</a>, <a href="/search/physics?searchtype=author&query=Ahmed%2C+H+A">H. A. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Akbar%2C+S">S. Akbar</a>, <a href="/search/physics?searchtype=author&query=Akchurin%2C+N">N. Akchurin</a>, <a href="/search/physics?searchtype=author&query=Akgul%2C+B">B. Akgul</a>, <a href="/search/physics?searchtype=author&query=Akgun%2C+B">B. Akgun</a>, <a href="/search/physics?searchtype=author&query=Akpinar%2C+R+O">R. O. Akpinar</a>, <a href="/search/physics?searchtype=author&query=Aktas%2C+E">E. Aktas</a>, <a href="/search/physics?searchtype=author&query=Kadhim%2C+A+A">A. Al Kadhim</a>, <a href="/search/physics?searchtype=author&query=Alexakhin%2C+V">V. Alexakhin</a>, <a href="/search/physics?searchtype=author&query=Alimena%2C+J">J. Alimena</a>, <a href="/search/physics?searchtype=author&query=Alison%2C+J">J. Alison</a>, <a href="/search/physics?searchtype=author&query=Alpana%2C+A">A. Alpana</a>, <a href="/search/physics?searchtype=author&query=Alshehri%2C+W">W. Alshehri</a>, <a href="/search/physics?searchtype=author&query=Dominguez%2C+P+A">P. Alvarez Dominguez</a>, <a href="/search/physics?searchtype=author&query=Alyari%2C+M">M. Alyari</a>, <a href="/search/physics?searchtype=author&query=Amendola%2C+C">C. Amendola</a>, <a href="/search/physics?searchtype=author&query=Amir%2C+R+B">R. B. Amir</a> , et al. (550 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="2406.11937v3-abstract-short" style="display: inline;"> A novel method to reconstruct the energy of hadronic showers in the CMS High Granularity Calorimeter (HGCAL) is presented. The HGCAL is a sampling calorimeter with very fine transverse and longitudinal granularity. The active media are silicon sensors and scintillator tiles readout by SiPMs and the absorbers are a combination of lead and Cu/CuW in the electromagnetic section, and steel in the hadr… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.11937v3-abstract-full').style.display = 'inline'; document.getElementById('2406.11937v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.11937v3-abstract-full" style="display: none;"> A novel method to reconstruct the energy of hadronic showers in the CMS High Granularity Calorimeter (HGCAL) is presented. The HGCAL is a sampling calorimeter with very fine transverse and longitudinal granularity. The active media are silicon sensors and scintillator tiles readout by SiPMs and the absorbers are a combination of lead and Cu/CuW in the electromagnetic section, and steel in the hadronic section. The shower reconstruction method is based on graph neural networks and it makes use of a dynamic reduction network architecture. It is shown that the algorithm is able to capture and mitigate the main effects that normally hinder the reconstruction of hadronic showers using classical reconstruction methods, by compensating for fluctuations in the multiplicity, energy, and spatial distributions of the shower's constituents. The performance of the algorithm is evaluated using test beam data collected in 2018 prototype of the CMS HGCAL accompanied by a section of the CALICE AHCAL prototype. The capability of the method to mitigate the impact of energy leakage from the calorimeter is also demonstrated. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.11937v3-abstract-full').style.display = 'none'; document.getElementById('2406.11937v3-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 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 19 (2024) P11025 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2211.04740">arXiv:2211.04740</a> <span> [<a href="https://arxiv.org/pdf/2211.04740">pdf</a>, <a href="https://arxiv.org/format/2211.04740">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 the CMS High Granularity Calorimeter prototype to charged pion beams of 20$-$300 GeV/c </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Acar%2C+B">B. Acar</a>, <a href="/search/physics?searchtype=author&query=Adamov%2C+G">G. Adamov</a>, <a href="/search/physics?searchtype=author&query=Adloff%2C+C">C. Adloff</a>, <a href="/search/physics?searchtype=author&query=Afanasiev%2C+S">S. Afanasiev</a>, <a href="/search/physics?searchtype=author&query=Akchurin%2C+N">N. Akchurin</a>, <a href="/search/physics?searchtype=author&query=Akg%C3%BCn%2C+B">B. Akg眉n</a>, <a href="/search/physics?searchtype=author&query=Alhusseini%2C+M">M. Alhusseini</a>, <a href="/search/physics?searchtype=author&query=Alison%2C+J">J. Alison</a>, <a href="/search/physics?searchtype=author&query=de+Almeida%2C+J+P+F+d+s+S">J. P. Figueiredo de sa Sousa de Almeida</a>, <a href="/search/physics?searchtype=author&query=de+Almeida%2C+P+G+D">P. G. Dias de Almeida</a>, <a href="/search/physics?searchtype=author&query=Alpana%2C+A">A. Alpana</a>, <a href="/search/physics?searchtype=author&query=Alyari%2C+M">M. Alyari</a>, <a href="/search/physics?searchtype=author&query=Andreev%2C+I">I. Andreev</a>, <a href="/search/physics?searchtype=author&query=Aras%2C+U">U. Aras</a>, <a href="/search/physics?searchtype=author&query=Aspell%2C+P">P. Aspell</a>, <a href="/search/physics?searchtype=author&query=Atakisi%2C+I+O">I. O. Atakisi</a>, <a href="/search/physics?searchtype=author&query=Bach%2C+O">O. Bach</a>, <a href="/search/physics?searchtype=author&query=Baden%2C+A">A. Baden</a>, <a href="/search/physics?searchtype=author&query=Bakas%2C+G">G. Bakas</a>, <a href="/search/physics?searchtype=author&query=Bakshi%2C+A">A. Bakshi</a>, <a href="/search/physics?searchtype=author&query=Banerjee%2C+S">S. Banerjee</a>, <a href="/search/physics?searchtype=author&query=DeBarbaro%2C+P">P. DeBarbaro</a>, <a href="/search/physics?searchtype=author&query=Bargassa%2C+P">P. Bargassa</a>, <a href="/search/physics?searchtype=author&query=Barney%2C+D">D. Barney</a>, <a href="/search/physics?searchtype=author&query=Beaudette%2C+F">F. Beaudette</a> , et al. (435 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="2211.04740v2-abstract-short" style="display: inline;"> The upgrade of the CMS experiment for the high luminosity operation of the LHC comprises the replacement of the current endcap calorimeter by a high granularity sampling calorimeter (HGCAL). The electromagnetic section of the HGCAL is based on silicon sensors interspersed between lead and copper (or copper tungsten) absorbers. The hadronic section uses layers of stainless steel as an absorbing med… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.04740v2-abstract-full').style.display = 'inline'; document.getElementById('2211.04740v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2211.04740v2-abstract-full" style="display: none;"> The upgrade of the CMS experiment for the high luminosity operation of the LHC comprises the replacement of the current endcap calorimeter by a high granularity sampling calorimeter (HGCAL). The electromagnetic section of the HGCAL is based on silicon sensors interspersed between lead and copper (or copper tungsten) absorbers. The hadronic section uses layers of stainless steel as an absorbing medium and silicon sensors as an active medium in the regions of high radiation exposure, and scintillator tiles directly readout by silicon photomultipliers in the remaining regions. As part of the development of the detector and its readout electronic components, a section of a silicon-based HGCAL prototype detector along with a section of the CALICE AHCAL prototype was exposed to muons, electrons and charged pions in beam test experiments at the H2 beamline at the CERN SPS in October 2018. The AHCAL uses the same technology as foreseen for the HGCAL but with much finer longitudinal segmentation. The performance of the calorimeters in terms of energy response and resolution, longitudinal and transverse shower profiles is studied using negatively charged pions, and is compared to GEANT4 predictions. This is the first report summarizing results of hadronic showers measured by the HGCAL prototype using beam test data. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.04740v2-abstract-full').style.display = 'none'; document.getElementById('2211.04740v2-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 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 November, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">Accepted for publication by JINST</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/2111.06855">arXiv:2111.06855</a> <span> [<a href="https://arxiv.org/pdf/2111.06855">pdf</a>, <a href="https://arxiv.org/format/2111.06855">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/10.1088/1748-0221/17/05/P05022">10.1088/1748-0221/17/05/P05022 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Response of a CMS HGCAL silicon-pad electromagnetic calorimeter prototype to 20-300 GeV positrons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Acar%2C+B">B. Acar</a>, <a href="/search/physics?searchtype=author&query=Adamov%2C+G">G. Adamov</a>, <a href="/search/physics?searchtype=author&query=Adloff%2C+C">C. Adloff</a>, <a href="/search/physics?searchtype=author&query=Afanasiev%2C+S">S. Afanasiev</a>, <a href="/search/physics?searchtype=author&query=Akchurin%2C+N">N. Akchurin</a>, <a href="/search/physics?searchtype=author&query=Akg%C3%BCn%2C+B">B. Akg眉n</a>, <a href="/search/physics?searchtype=author&query=Khan%2C+F+A">F. Alam Khan</a>, <a href="/search/physics?searchtype=author&query=Alhusseini%2C+M">M. Alhusseini</a>, <a href="/search/physics?searchtype=author&query=Alison%2C+J">J. Alison</a>, <a href="/search/physics?searchtype=author&query=Alpana%2C+A">A. Alpana</a>, <a href="/search/physics?searchtype=author&query=Altopp%2C+G">G. Altopp</a>, <a href="/search/physics?searchtype=author&query=Alyari%2C+M">M. Alyari</a>, <a href="/search/physics?searchtype=author&query=An%2C+S">S. An</a>, <a href="/search/physics?searchtype=author&query=Anagul%2C+S">S. Anagul</a>, <a href="/search/physics?searchtype=author&query=Andreev%2C+I">I. Andreev</a>, <a href="/search/physics?searchtype=author&query=Aspell%2C+P">P. Aspell</a>, <a href="/search/physics?searchtype=author&query=Atakisi%2C+I+O">I. O. Atakisi</a>, <a href="/search/physics?searchtype=author&query=Bach%2C+O">O. Bach</a>, <a href="/search/physics?searchtype=author&query=Baden%2C+A">A. Baden</a>, <a href="/search/physics?searchtype=author&query=Bakas%2C+G">G. Bakas</a>, <a href="/search/physics?searchtype=author&query=Bakshi%2C+A">A. Bakshi</a>, <a href="/search/physics?searchtype=author&query=Bannerjee%2C+S">S. Bannerjee</a>, <a href="/search/physics?searchtype=author&query=Bargassa%2C+P">P. Bargassa</a>, <a href="/search/physics?searchtype=author&query=Barney%2C+D">D. Barney</a>, <a href="/search/physics?searchtype=author&query=Beaudette%2C+F">F. Beaudette</a> , et al. (364 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="2111.06855v3-abstract-short" style="display: inline;"> The Compact Muon Solenoid Collaboration is designing a new high-granularity endcap calorimeter, HGCAL, to be installed later this decade. As part of this development work, a prototype system was built, with an electromagnetic section consisting of 14 double-sided structures, providing 28 sampling layers. Each sampling layer has an hexagonal module, where a multipad large-area silicon sensor is glu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.06855v3-abstract-full').style.display = 'inline'; document.getElementById('2111.06855v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2111.06855v3-abstract-full" style="display: none;"> The Compact Muon Solenoid Collaboration is designing a new high-granularity endcap calorimeter, HGCAL, to be installed later this decade. As part of this development work, a prototype system was built, with an electromagnetic section consisting of 14 double-sided structures, providing 28 sampling layers. Each sampling layer has an hexagonal module, where a multipad large-area silicon sensor is glued between an electronics circuit board and a metal baseplate. The sensor pads of approximately 1 cm$^2$ are wire-bonded to the circuit board and are readout by custom integrated circuits. The prototype was extensively tested with beams at CERN's Super Proton Synchrotron in 2018. Based on the data collected with beams of positrons, with energies ranging from 20 to 300 GeV, measurements of the energy resolution and linearity, the position and angular resolutions, and the shower shapes are presented and compared to a detailed Geant4 simulation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.06855v3-abstract-full').style.display = 'none'; document.getElementById('2111.06855v3-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> 31 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 November, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2021. </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/2107.03621">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/2012.06336">arXiv:2012.06336</a> <span> [<a href="https://arxiv.org/pdf/2012.06336">pdf</a>, <a href="https://arxiv.org/format/2012.06336">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"> Construction and commissioning of CMS CE prototype silicon modules </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Acar%2C+B">B. Acar</a>, <a href="/search/physics?searchtype=author&query=Adamov%2C+G">G. Adamov</a>, <a href="/search/physics?searchtype=author&query=Adloff%2C+C">C. Adloff</a>, <a href="/search/physics?searchtype=author&query=Afanasiev%2C+S">S. Afanasiev</a>, <a href="/search/physics?searchtype=author&query=Akchurin%2C+N">N. Akchurin</a>, <a href="/search/physics?searchtype=author&query=Akg%C3%BCn%2C+B">B. Akg眉n</a>, <a href="/search/physics?searchtype=author&query=Alhusseini%2C+M">M. Alhusseini</a>, <a href="/search/physics?searchtype=author&query=Alison%2C+J">J. Alison</a>, <a href="/search/physics?searchtype=author&query=Altopp%2C+G">G. Altopp</a>, <a href="/search/physics?searchtype=author&query=Alyari%2C+M">M. Alyari</a>, <a href="/search/physics?searchtype=author&query=An%2C+S">S. An</a>, <a href="/search/physics?searchtype=author&query=Anagul%2C+S">S. Anagul</a>, <a href="/search/physics?searchtype=author&query=Andreev%2C+I">I. Andreev</a>, <a href="/search/physics?searchtype=author&query=Andrews%2C+M">M. Andrews</a>, <a href="/search/physics?searchtype=author&query=Aspell%2C+P">P. Aspell</a>, <a href="/search/physics?searchtype=author&query=Atakisi%2C+I+A">I. A. Atakisi</a>, <a href="/search/physics?searchtype=author&query=Bach%2C+O">O. Bach</a>, <a href="/search/physics?searchtype=author&query=Baden%2C+A">A. Baden</a>, <a href="/search/physics?searchtype=author&query=Bakas%2C+G">G. Bakas</a>, <a href="/search/physics?searchtype=author&query=Bakshi%2C+A">A. Bakshi</a>, <a href="/search/physics?searchtype=author&query=Bargassa%2C+P">P. Bargassa</a>, <a href="/search/physics?searchtype=author&query=Barney%2C+D">D. Barney</a>, <a href="/search/physics?searchtype=author&query=Becheva%2C+E">E. Becheva</a>, <a href="/search/physics?searchtype=author&query=Behera%2C+P">P. Behera</a>, <a href="/search/physics?searchtype=author&query=Belloni%2C+A">A. Belloni</a> , et al. (307 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="2012.06336v1-abstract-short" style="display: inline;"> As part of its HL-LHC upgrade program, the CMS Collaboration is developing a High Granularity Calorimeter (CE) to replace the existing endcap calorimeters. The CE is a sampling calorimeter with unprecedented transverse and longitudinal readout for both electromagnetic (CE-E) and hadronic (CE-H) compartments. The calorimeter will be built with $\sim$30,000 hexagonal silicon modules. Prototype modul… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.06336v1-abstract-full').style.display = 'inline'; document.getElementById('2012.06336v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2012.06336v1-abstract-full" style="display: none;"> As part of its HL-LHC upgrade program, the CMS Collaboration is developing a High Granularity Calorimeter (CE) to replace the existing endcap calorimeters. The CE is a sampling calorimeter with unprecedented transverse and longitudinal readout for both electromagnetic (CE-E) and hadronic (CE-H) compartments. The calorimeter will be built with $\sim$30,000 hexagonal silicon modules. Prototype modules have been constructed with 6-inch hexagonal silicon sensors with cell areas of 1.1~$cm^2$, and the SKIROC2-CMS readout ASIC. Beam tests of different sampling configurations were conducted with the prototype modules at DESY and CERN in 2017 and 2018. This paper describes the construction and commissioning of the CE calorimeter prototype, the silicon modules used in the construction, their basic performance, and the methods used for their calibration. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.06336v1-abstract-full').style.display = 'none'; document.getElementById('2012.06336v1-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, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 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">35 pages, submitted to JINST</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2012.03876">arXiv:2012.03876</a> <span> [<a href="https://arxiv.org/pdf/2012.03876">pdf</a>, <a href="https://arxiv.org/format/2012.03876">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/10.1088/1748-0221/16/04/T04001">10.1088/1748-0221/16/04/T04001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The DAQ system of the 12,000 Channel CMS High Granularity Calorimeter Prototype </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Acar%2C+B">B. Acar</a>, <a href="/search/physics?searchtype=author&query=Adamov%2C+G">G. Adamov</a>, <a href="/search/physics?searchtype=author&query=Adloff%2C+C">C. Adloff</a>, <a href="/search/physics?searchtype=author&query=Afanasiev%2C+S">S. Afanasiev</a>, <a href="/search/physics?searchtype=author&query=Akchurin%2C+N">N. Akchurin</a>, <a href="/search/physics?searchtype=author&query=Akg%C3%BCn%2C+B">B. Akg眉n</a>, <a href="/search/physics?searchtype=author&query=Alhusseini%2C+M">M. Alhusseini</a>, <a href="/search/physics?searchtype=author&query=Alison%2C+J">J. Alison</a>, <a href="/search/physics?searchtype=author&query=Altopp%2C+G">G. Altopp</a>, <a href="/search/physics?searchtype=author&query=Alyari%2C+M">M. Alyari</a>, <a href="/search/physics?searchtype=author&query=An%2C+S">S. An</a>, <a href="/search/physics?searchtype=author&query=Anagul%2C+S">S. Anagul</a>, <a href="/search/physics?searchtype=author&query=Andreev%2C+I">I. Andreev</a>, <a href="/search/physics?searchtype=author&query=Andrews%2C+M">M. Andrews</a>, <a href="/search/physics?searchtype=author&query=Aspell%2C+P">P. Aspell</a>, <a href="/search/physics?searchtype=author&query=Atakisi%2C+I+A">I. A. Atakisi</a>, <a href="/search/physics?searchtype=author&query=Bach%2C+O">O. Bach</a>, <a href="/search/physics?searchtype=author&query=Baden%2C+A">A. Baden</a>, <a href="/search/physics?searchtype=author&query=Bakas%2C+G">G. Bakas</a>, <a href="/search/physics?searchtype=author&query=Bakshi%2C+A">A. Bakshi</a>, <a href="/search/physics?searchtype=author&query=Bargassa%2C+P">P. Bargassa</a>, <a href="/search/physics?searchtype=author&query=Barney%2C+D">D. Barney</a>, <a href="/search/physics?searchtype=author&query=Becheva%2C+E">E. Becheva</a>, <a href="/search/physics?searchtype=author&query=Behera%2C+P">P. Behera</a>, <a href="/search/physics?searchtype=author&query=Belloni%2C+A">A. Belloni</a> , et al. (307 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="2012.03876v2-abstract-short" style="display: inline;"> The CMS experiment at the CERN LHC will be upgraded to accommodate the 5-fold increase in the instantaneous luminosity expected at the High-Luminosity LHC (HL-LHC). Concomitant with this increase will be an increase in the number of interactions in each bunch crossing and a significant increase in the total ionising dose and fluence. One part of this upgrade is the replacement of the current endca… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.03876v2-abstract-full').style.display = 'inline'; document.getElementById('2012.03876v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2012.03876v2-abstract-full" style="display: none;"> The CMS experiment at the CERN LHC will be upgraded to accommodate the 5-fold increase in the instantaneous luminosity expected at the High-Luminosity LHC (HL-LHC). Concomitant with this increase will be an increase in the number of interactions in each bunch crossing and a significant increase in the total ionising dose and fluence. One part of this upgrade is the replacement of the current endcap calorimeters with a high granularity sampling calorimeter equipped with silicon sensors, designed to manage the high collision rates. As part of the development of this calorimeter, a series of beam tests have been conducted with different sampling configurations using prototype segmented silicon detectors. In the most recent of these tests, conducted in late 2018 at the CERN SPS, the performance of a prototype calorimeter equipped with ${\approx}12,000\rm{~channels}$ of silicon sensors was studied with beams of high-energy electrons, pions and muons. This paper describes the custom-built scalable data acquisition system that was built with readily available FPGA mezzanines and low-cost Raspberry PI computers. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.03876v2-abstract-full').style.display = 'none'; document.getElementById('2012.03876v2-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, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 December, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2020. </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/1701.05227">arXiv:1701.05227</a> <span> [<a href="https://arxiv.org/pdf/1701.05227">pdf</a>, <a href="https://arxiv.org/format/1701.05227">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/10.1088/1748-0221/12/03/P03007">10.1088/1748-0221/12/03/P03007 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Diamond Detectors for the TOTEM Timing Upgrade </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=TOTEM+Collaboration"> TOTEM Collaboration</a>, <a href="/search/physics?searchtype=author&query=Antchev%2C+G">G. Antchev</a>, <a href="/search/physics?searchtype=author&query=Aspell%2C+P">P. Aspell</a>, <a href="/search/physics?searchtype=author&query=Atanassov%2C+I">I. Atanassov</a>, <a href="/search/physics?searchtype=author&query=Avati%2C+V">V. Avati</a>, <a href="/search/physics?searchtype=author&query=Baechler%2C+J">J. Baechler</a>, <a href="/search/physics?searchtype=author&query=Berardi%2C+V">V. Berardi</a>, <a href="/search/physics?searchtype=author&query=Berretti%2C+M">M. Berretti</a>, <a href="/search/physics?searchtype=author&query=Bossini%2C+E">E. Bossini</a>, <a href="/search/physics?searchtype=author&query=Bottigli%2C+U">U. Bottigli</a>, <a href="/search/physics?searchtype=author&query=Bozzo%2C+M">M. Bozzo</a>, <a href="/search/physics?searchtype=author&query=Broul%C3%ADm%2C+P">P. Broul铆m</a>, <a href="/search/physics?searchtype=author&query=Buzzo%2C+A">A. Buzzo</a>, <a href="/search/physics?searchtype=author&query=Cafagna%2C+F+S">F. S. Cafagna</a>, <a href="/search/physics?searchtype=author&query=Catanesi%2C+M+G">M. G. Catanesi</a>, <a href="/search/physics?searchtype=author&query=Csan%C3%A1d%2C+M">M. Csan谩d</a>, <a href="/search/physics?searchtype=author&query=Cs%C3%B6rg%C5%91%2C+T">T. Cs枚rg艖</a>, <a href="/search/physics?searchtype=author&query=Deile%2C+M">M. Deile</a>, <a href="/search/physics?searchtype=author&query=De+Leonardis%2C+F">F. De Leonardis</a>, <a href="/search/physics?searchtype=author&query=D%27Orazio%2C+A">A. D'Orazio</a>, <a href="/search/physics?searchtype=author&query=Doubek%2C+M">M. Doubek</a>, <a href="/search/physics?searchtype=author&query=Eggert%2C+K">K. Eggert</a>, <a href="/search/physics?searchtype=author&query=Eremin%2C+V">V. Eremin</a>, <a href="/search/physics?searchtype=author&query=Ferro%2C+F">F. Ferro</a>, <a href="/search/physics?searchtype=author&query=Fiergolski%2C+A">A. Fiergolski</a> , et al. (58 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="1701.05227v1-abstract-short" style="display: inline;"> This paper describes the design and the performance of the timing detector developed by the TOTEM Collaboration for the Roman Pots (RPs) to measure the Time-Of-Flight (TOF) of the protons produced in central diffractive interactions at the LHC. The measurement of the TOF of the protons allows the determination of the longitudinal position of the proton interaction vertex and its association with o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1701.05227v1-abstract-full').style.display = 'inline'; document.getElementById('1701.05227v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1701.05227v1-abstract-full" style="display: none;"> This paper describes the design and the performance of the timing detector developed by the TOTEM Collaboration for the Roman Pots (RPs) to measure the Time-Of-Flight (TOF) of the protons produced in central diffractive interactions at the LHC. The measurement of the TOF of the protons allows the determination of the longitudinal position of the proton interaction vertex and its association with one of the vertices reconstructed by the CMS detectors. The TOF detector is based on single crystal Chemical Vapor Deposition (scCVD) diamond plates and is designed to measure the protons TOF with about 50 ps time precision. This upgrade to the TOTEM apparatus will be used in the LHC run 2 and will tag the central diffractive events up to an interaction pileup of about 1. A dedicated fast and low noise electronics for the signal amplification has been developed. The digitization of the diamond signal is performed by sampling the waveform. After introducing the physics studies that will most profit from the addition of these new detectors, we discuss in detail the optimization and the performance of the first TOF detector installed in the LHC in November 2015. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1701.05227v1-abstract-full').style.display = 'none'; document.getElementById('1701.05227v1-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, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2017. </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">26 pages, 18 figures, 2 tables, submitted for publication to JINST</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-PH-EP-2016-317 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 12 (2017) no.03, P03007 </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/1406.0546">arXiv:1406.0546</a> <span> [<a href="https://arxiv.org/pdf/1406.0546">pdf</a>, <a href="https://arxiv.org/ps/1406.0546">ps</a>, <a href="https://arxiv.org/format/1406.0546">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/10.1088/1367-2630/16/10/103041">10.1088/1367-2630/16/10/103041 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> LHC Optics Measurement with Proton Tracks Detected by the Roman Pots of the TOTEM Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=The+TOTEM+Collaboration"> The TOTEM Collaboration</a>, <a href="/search/physics?searchtype=author&query=Antchev%2C+G">G. Antchev</a>, <a href="/search/physics?searchtype=author&query=Aspell%2C+P">P. Aspell</a>, <a href="/search/physics?searchtype=author&query=Atanassov%2C+I">I. Atanassov</a>, <a href="/search/physics?searchtype=author&query=Avati%2C+V">V. Avati</a>, <a href="/search/physics?searchtype=author&query=Baechler%2C+J">J. Baechler</a>, <a href="/search/physics?searchtype=author&query=Berardi%2C+V">V. Berardi</a>, <a href="/search/physics?searchtype=author&query=Berretti%2C+M">M. Berretti</a>, <a href="/search/physics?searchtype=author&query=Bossini%2C+E">E. Bossini</a>, <a href="/search/physics?searchtype=author&query=Bottigli%2C+U">U. Bottigli</a>, <a href="/search/physics?searchtype=author&query=Bozzo%2C+M">M. Bozzo</a>, <a href="/search/physics?searchtype=author&query=Br%C3%BCcken%2C+E">E. Br眉cken</a>, <a href="/search/physics?searchtype=author&query=Buzzo%2C+A">A. Buzzo</a>, <a href="/search/physics?searchtype=author&query=Cafagna%2C+F+S">F. S. Cafagna</a>, <a href="/search/physics?searchtype=author&query=Catanesi%2C+M+G">M. G. Catanesi</a>, <a href="/search/physics?searchtype=author&query=Covault%2C+C">C. Covault</a>, <a href="/search/physics?searchtype=author&query=Csan%C3%A1d%2C+M">M. Csan谩d</a>, <a href="/search/physics?searchtype=author&query=Cs%C3%B6rg%C5%91%2C+T">T. Cs枚rg艖</a>, <a href="/search/physics?searchtype=author&query=Deile%2C+M">M. Deile</a>, <a href="/search/physics?searchtype=author&query=Doubek%2C+M">M. Doubek</a>, <a href="/search/physics?searchtype=author&query=Eggert%2C+K">K. Eggert</a>, <a href="/search/physics?searchtype=author&query=Eremin%2C+V">V. Eremin</a>, <a href="/search/physics?searchtype=author&query=Ferro%2C+F">F. Ferro</a>, <a href="/search/physics?searchtype=author&query=Fiergolski%2C+A">A. Fiergolski</a>, <a href="/search/physics?searchtype=author&query=Garcia%2C+F">F. Garcia</a> , et al. (54 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="1406.0546v1-abstract-short" style="display: inline;"> Precise knowledge of the beam optics at the LHC is crucial to fulfil the physics goals of the TOTEM experiment, where the kinematics of the scattered protons is reconstructed with the near-beam telescopes -- so-called Roman Pots (RP). Before being detected, the protons' trajectories are influenced by the magnetic fields of the accelerator lattice. Thus precise understanding of the proton transport… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1406.0546v1-abstract-full').style.display = 'inline'; document.getElementById('1406.0546v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1406.0546v1-abstract-full" style="display: none;"> Precise knowledge of the beam optics at the LHC is crucial to fulfil the physics goals of the TOTEM experiment, where the kinematics of the scattered protons is reconstructed with the near-beam telescopes -- so-called Roman Pots (RP). Before being detected, the protons' trajectories are influenced by the magnetic fields of the accelerator lattice. Thus precise understanding of the proton transport is of key importance for the experiment. A novel method of optics evaluation is proposed which exploits kinematical distributions of elastically scattered protons observed in the RPs. Theoretical predictions, as well as Monte Carlo studies, show that the residual uncertainty of this optics estimation method is smaller than 0.25 percent. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1406.0546v1-abstract-full').style.display = 'none'; document.getElementById('1406.0546v1-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> 2 June, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 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">20 pages, 11 figures, 5 figures, to be submitted to New J. Phys</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-PH-EP-2014-066 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1310.2908">arXiv:1310.2908</a> <span> [<a href="https://arxiv.org/pdf/1310.2908">pdf</a>, <a href="https://arxiv.org/ps/1310.2908">ps</a>, <a href="https://arxiv.org/format/1310.2908">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/10.1142/S0217751X13300469">10.1142/S0217751X13300469 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Performance of the TOTEM Detectors at the LHC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=TOTEM+Collaboration"> TOTEM Collaboration</a>, <a href="/search/physics?searchtype=author&query=Antchev%2C+G">G. Antchev</a>, <a href="/search/physics?searchtype=author&query=Aspell%2C+P">P. Aspell</a>, <a href="/search/physics?searchtype=author&query=Atanassov%2C+I">I. Atanassov</a>, <a href="/search/physics?searchtype=author&query=Avati%2C+V">V. Avati</a>, <a href="/search/physics?searchtype=author&query=Baechler%2C+J">J. Baechler</a>, <a href="/search/physics?searchtype=author&query=Bagliesi%2C+M+G">M. G. Bagliesi</a>, <a href="/search/physics?searchtype=author&query=Berardi%2C+V">V. Berardi</a>, <a href="/search/physics?searchtype=author&query=Berretti%2C+M">M. Berretti</a>, <a href="/search/physics?searchtype=author&query=Bossini%2C+E">E. Bossini</a>, <a href="/search/physics?searchtype=author&query=Bottigli%2C+U">U. Bottigli</a>, <a href="/search/physics?searchtype=author&query=Bozzo%2C+M">M. Bozzo</a>, <a href="/search/physics?searchtype=author&query=Br%C3%BCcken%2C+E">E. Br眉cken</a>, <a href="/search/physics?searchtype=author&query=Buzzo%2C+A">A. Buzzo</a>, <a href="/search/physics?searchtype=author&query=Cafagna%2C+F+S">F. S. Cafagna</a>, <a href="/search/physics?searchtype=author&query=Catanesi%2C+M+G">M. G. Catanesi</a>, <a href="/search/physics?searchtype=author&query=Cecchi%2C+R">R. Cecchi</a>, <a href="/search/physics?searchtype=author&query=Covault%2C+C">C. Covault</a>, <a href="/search/physics?searchtype=author&query=Csan%C3%A1d%2C+M">M. Csan谩d</a>, <a href="/search/physics?searchtype=author&query=Cs%C3%B6rg%C5%91%2C+T">T. Cs枚rg艖</a>, <a href="/search/physics?searchtype=author&query=Deile%2C+M">M. Deile</a>, <a href="/search/physics?searchtype=author&query=Doubek%2C+M">M. Doubek</a>, <a href="/search/physics?searchtype=author&query=Eggert%2C+K">K. Eggert</a>, <a href="/search/physics?searchtype=author&query=Eremin%2C+V">V. Eremin</a>, <a href="/search/physics?searchtype=author&query=Ferro%2C+F">F. Ferro</a> , et al. (57 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="1310.2908v1-abstract-short" style="display: inline;"> The TOTEM Experiment is designed to measure the total proton-proton cross-section with the luminosity-independent method and to study elastic and diffractive pp scattering at the LHC. To achieve optimum forward coverage for charged particles emitted by the pp collisions in the interaction point IP5, two tracking telescopes, T1 and T2, are installed on each side of the IP in the pseudorapidity regi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1310.2908v1-abstract-full').style.display = 'inline'; document.getElementById('1310.2908v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1310.2908v1-abstract-full" style="display: none;"> The TOTEM Experiment is designed to measure the total proton-proton cross-section with the luminosity-independent method and to study elastic and diffractive pp scattering at the LHC. To achieve optimum forward coverage for charged particles emitted by the pp collisions in the interaction point IP5, two tracking telescopes, T1 and T2, are installed on each side of the IP in the pseudorapidity region 3.1 < = |eta | < = 6.5, and special movable beam-pipe insertions - called Roman Pots (RP) - are placed at distances of +- 147 m and +- 220 m from IP5. This article describes in detail the working of the TOTEM detector to produce physics results in the first three years of operation and data taking at the LHC. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1310.2908v1-abstract-full').style.display = 'none'; document.getElementById('1310.2908v1-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 October, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">40 pages, 31 figures, submitted to Int. J. Mod. Phys. A</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-PH-EP-2013-173 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Int. J. Mod. Phys. A 28, 1330046 (2013) </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/1211.1494">arXiv:1211.1494</a> <span>  </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 GEM Detector System for an Upgrade of the High-eta Muon Endcap Stations GE1/1 + ME1/1 in CMS </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=Aspell%2C+P">P. Aspell</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">S. Bianco</a>, <a href="/search/physics?searchtype=author&query=Hoepfner%2C+K">K. Hoepfner</a>, <a href="/search/physics?searchtype=author&query=Hohlmann%2C+M">M. Hohlmann</a>, <a href="/search/physics?searchtype=author&query=Maggi%2C+M">M. Maggi</a>, <a href="/search/physics?searchtype=author&query=De+Lentdecker%2C+G">G. De Lentdecker</a>, <a href="/search/physics?searchtype=author&query=Safonov%2C+A">A. Safonov</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+A">A. Sharma</a>, <a href="/search/physics?searchtype=author&query=Tytgat%2C+M">M. Tytgat</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="1211.1494v2-abstract-short" style="display: inline;"> Based on the CMS Upgrade R&D Proposal RD10.02, we describe the motivation and main features of the CMS GEM Project for LS2 and propose the addition of a full GE1/12 detector station comprising Gas Electron Multiplier (GEM) chambers to the forward muon system of CMS. The limitations of the currently existing forward muon detector when operating at increasingly high luminosity expected after LS1 are… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.1494v2-abstract-full').style.display = 'inline'; document.getElementById('1211.1494v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1211.1494v2-abstract-full" style="display: none;"> Based on the CMS Upgrade R&D Proposal RD10.02, we describe the motivation and main features of the CMS GEM Project for LS2 and propose the addition of a full GE1/12 detector station comprising Gas Electron Multiplier (GEM) chambers to the forward muon system of CMS. The limitations of the currently existing forward muon detector when operating at increasingly high luminosity expected after LS1 are laid out followed by a brief description of the anticipated performance improvements achievable with a GE1/1 station. The second part describes the detector system followed by an overview of electronics and associated services including a discussion of the schedule and cost of the project. Plans for a precursor demonstrator installation in LS1 are presented. This proposal is intended as a concise follow-up of the detailed document CMS-IN-2012-023. If approved, this is to be followed by a detailed Technical Design Report. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.1494v2-abstract-full').style.display = 'none'; document.getElementById('1211.1494v2-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, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 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">This paper has been withdrawn for rights issue</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1201.4657">arXiv:1201.4657</a> <span> [<a href="https://arxiv.org/pdf/1201.4657">pdf</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"> Infrastructure for Detector Research and Development towards the International Linear Collider </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Aguilar%2C+J">J. Aguilar</a>, <a href="/search/physics?searchtype=author&query=Ambalathankandy%2C+P">P. Ambalathankandy</a>, <a href="/search/physics?searchtype=author&query=Fiutowski%2C+T">T. Fiutowski</a>, <a href="/search/physics?searchtype=author&query=Idzik%2C+M">M. Idzik</a>, <a href="/search/physics?searchtype=author&query=Kulis%2C+S">Sz. Kulis</a>, <a href="/search/physics?searchtype=author&query=Przyborowski%2C+D">D. Przyborowski</a>, <a href="/search/physics?searchtype=author&query=Swientek%2C+K">K. Swientek</a>, <a href="/search/physics?searchtype=author&query=Bamberger%2C+A">A. Bamberger</a>, <a href="/search/physics?searchtype=author&query=K%C3%B6hli%2C+M">M. K枚hli</a>, <a href="/search/physics?searchtype=author&query=Lupberger%2C+M">M. Lupberger</a>, <a href="/search/physics?searchtype=author&query=Renz%2C+U">U. Renz</a>, <a href="/search/physics?searchtype=author&query=Schumacher%2C+M">M. Schumacher</a>, <a href="/search/physics?searchtype=author&query=Zwerger%2C+A">Andreas Zwerger</a>, <a href="/search/physics?searchtype=author&query=Calderone%2C+A">A. Calderone</a>, <a href="/search/physics?searchtype=author&query=Cussans%2C+D+G">D. G. Cussans</a>, <a href="/search/physics?searchtype=author&query=Heath%2C+H+F">H. F. Heath</a>, <a href="/search/physics?searchtype=author&query=Mandry%2C+S">S. Mandry</a>, <a href="/search/physics?searchtype=author&query=Page%2C+R+F">R. F. Page</a>, <a href="/search/physics?searchtype=author&query=Velthuis%2C+J+J">J. J. Velthuis</a>, <a href="/search/physics?searchtype=author&query=Atti%C3%A9%2C+D">D. Atti茅</a>, <a href="/search/physics?searchtype=author&query=Calvet%2C+D">D. Calvet</a>, <a href="/search/physics?searchtype=author&query=Colas%2C+P">P. Colas</a>, <a href="/search/physics?searchtype=author&query=Coppolani%2C+X">X. Coppolani</a>, <a href="/search/physics?searchtype=author&query=Degerli%2C+Y">Y. Degerli</a>, <a href="/search/physics?searchtype=author&query=Delagnes%2C+E">E. Delagnes</a> , et al. (252 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="1201.4657v1-abstract-short" style="display: inline;"> The EUDET-project was launched to create an infrastructure for developing and testing new and advanced detector technologies to be used at a future linear collider. The aim was to make possible experimentation and analysis of data for institutes, which otherwise could not be realized due to lack of resources. The infrastructure comprised an analysis and software network, and instrumentation infras… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1201.4657v1-abstract-full').style.display = 'inline'; document.getElementById('1201.4657v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1201.4657v1-abstract-full" style="display: none;"> The EUDET-project was launched to create an infrastructure for developing and testing new and advanced detector technologies to be used at a future linear collider. The aim was to make possible experimentation and analysis of data for institutes, which otherwise could not be realized due to lack of resources. The infrastructure comprised an analysis and software network, and instrumentation infrastructures for tracking detectors as well as for calorimetry. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1201.4657v1-abstract-full').style.display = 'none'; document.getElementById('1201.4657v1-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> 23 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">54 pages, 48 pictures</span> </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> </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 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