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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/2403.15144">arXiv:2403.15144</a> <span> [<a href="https://arxiv.org/pdf/2403.15144">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> </div> </div> <p class="title is-5 mathjax"> Dynamic Interface Printing </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Vidler%2C+C">Callum Vidler</a>, <a href="/search/physics?searchtype=author&query=Halwes%2C+M">Michael Halwes</a>, <a href="/search/physics?searchtype=author&query=Kolesnik%2C+K">Kirill Kolesnik</a>, <a href="/search/physics?searchtype=author&query=Segeritz%2C+P">Philipp Segeritz</a>, <a href="/search/physics?searchtype=author&query=Mail%2C+M">Matthew Mail</a>, <a href="/search/physics?searchtype=author&query=Barlow%2C+A+J">Anders J. Barlow</a>, <a href="/search/physics?searchtype=author&query=Koehl%2C+E+M">Emmanuelle M. Koehl</a>, <a href="/search/physics?searchtype=author&query=Ramakrishnan%2C+A">Anand Ramakrishnan</a>, <a href="/search/physics?searchtype=author&query=Scott%2C+D+J">Daniel J. Scott</a>, <a href="/search/physics?searchtype=author&query=Heath%2C+D+E">Daniel E. Heath</a>, <a href="/search/physics?searchtype=author&query=Crozier%2C+K+B">Kenneth B. Crozier</a>, <a href="/search/physics?searchtype=author&query=Collins%2C+D+J">David J. Collins</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="2403.15144v2-abstract-short" style="display: inline;"> Additive manufacturing is an expanding multidisciplinary field encompassing applications including medical devices, aerospace components, microfabrication strategies, and artificial organs. Among additive manufacturing approaches, light-based printing technologies, including two-photon polymerization, projection micro stereolithography, and volumetric printing, have garnered significant attention… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.15144v2-abstract-full').style.display = 'inline'; document.getElementById('2403.15144v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2403.15144v2-abstract-full" style="display: none;"> Additive manufacturing is an expanding multidisciplinary field encompassing applications including medical devices, aerospace components, microfabrication strategies, and artificial organs. Among additive manufacturing approaches, light-based printing technologies, including two-photon polymerization, projection micro stereolithography, and volumetric printing, have garnered significant attention due to their speed, resolution and/or potential applications for biofabrication. In this study, we introduce dynamic interface printing (DIP), a new 3D printing approach that leverages an acoustically modulated, constrained air-liquid boundary to rapidly generate cm-scale three-dimensional structures within tens of seconds. Distinct from volumetric approaches, this process eliminates the need for intricate feedback systems, specialized chemistry, or complex optics while maintaining rapid printing speeds. We demonstrate the versatility of this technique across a broad array of materials and intricate geometries, including those that would be impossible to print via conventional layer-by-layer methods. In doing so, we demonstrate the rapid fabrication of complex structures in-situ, overprinting, structural parallelisation, and biofabrication utility. Moreover, we showcase that the formation of surface waves at this boundary enables enhanced mass transport, material flexibility, and permits three-dimensional particle patterning. We therefore anticipate that this approach will be invaluable for applications where high resolution, scalable throughput, and biocompatible printing is required. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.15144v2-abstract-full').style.display = 'none'; document.getElementById('2403.15144v2-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 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 March, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">63 Pages, 4 Figures, 18 Supplementary 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/2305.10515">arXiv:2305.10515</a> <span> [<a href="https://arxiv.org/pdf/2305.10515">pdf</a>, <a href="https://arxiv.org/format/2305.10515">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/19/05/P05065">10.1088/1748-0221/19/05/P05065 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The LHCb upgrade I </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=LHCb+collaboration"> LHCb collaboration</a>, <a href="/search/physics?searchtype=author&query=Aaij%2C+R">R. Aaij</a>, <a href="/search/physics?searchtype=author&query=Abdelmotteleb%2C+A+S+W">A. S. W. Abdelmotteleb</a>, <a href="/search/physics?searchtype=author&query=Beteta%2C+C+A">C. Abellan Beteta</a>, <a href="/search/physics?searchtype=author&query=Abudin%C3%A9n%2C+F">F. Abudin茅n</a>, <a href="/search/physics?searchtype=author&query=Achard%2C+C">C. Achard</a>, <a href="/search/physics?searchtype=author&query=Ackernley%2C+T">T. Ackernley</a>, <a href="/search/physics?searchtype=author&query=Adeva%2C+B">B. Adeva</a>, <a href="/search/physics?searchtype=author&query=Adinolfi%2C+M">M. Adinolfi</a>, <a href="/search/physics?searchtype=author&query=Adlarson%2C+P">P. Adlarson</a>, <a href="/search/physics?searchtype=author&query=Afsharnia%2C+H">H. Afsharnia</a>, <a href="/search/physics?searchtype=author&query=Agapopoulou%2C+C">C. Agapopoulou</a>, <a href="/search/physics?searchtype=author&query=Aidala%2C+C+A">C. A. Aidala</a>, <a href="/search/physics?searchtype=author&query=Ajaltouni%2C+Z">Z. Ajaltouni</a>, <a href="/search/physics?searchtype=author&query=Akar%2C+S">S. Akar</a>, <a href="/search/physics?searchtype=author&query=Akiba%2C+K">K. Akiba</a>, <a href="/search/physics?searchtype=author&query=Albicocco%2C+P">P. Albicocco</a>, <a href="/search/physics?searchtype=author&query=Albrecht%2C+J">J. Albrecht</a>, <a href="/search/physics?searchtype=author&query=Alessio%2C+F">F. Alessio</a>, <a href="/search/physics?searchtype=author&query=Alexander%2C+M">M. Alexander</a>, <a href="/search/physics?searchtype=author&query=Albero%2C+A+A">A. Alfonso Albero</a>, <a href="/search/physics?searchtype=author&query=Aliouche%2C+Z">Z. Aliouche</a>, <a href="/search/physics?searchtype=author&query=Cartelle%2C+P+A">P. Alvarez Cartelle</a>, <a href="/search/physics?searchtype=author&query=Amalric%2C+R">R. Amalric</a>, <a href="/search/physics?searchtype=author&query=Amato%2C+S">S. Amato</a> , et al. (1298 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="2305.10515v2-abstract-short" style="display: inline;"> The LHCb upgrade represents a major change of the experiment. The detectors have been almost completely renewed to allow running at an instantaneous luminosity five times larger than that of the previous running periods. Readout of all detectors into an all-software trigger is central to the new design, facilitating the reconstruction of events at the maximum LHC interaction rate, and their select… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.10515v2-abstract-full').style.display = 'inline'; document.getElementById('2305.10515v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.10515v2-abstract-full" style="display: none;"> The LHCb upgrade represents a major change of the experiment. The detectors have been almost completely renewed to allow running at an instantaneous luminosity five times larger than that of the previous running periods. Readout of all detectors into an all-software trigger is central to the new design, facilitating the reconstruction of events at the maximum LHC interaction rate, and their selection in real time. The experiment's tracking system has been completely upgraded with a new pixel vertex detector, a silicon tracker upstream of the dipole magnet and three scintillating fibre tracking stations downstream of the magnet. The whole photon detection system of the RICH detectors has been renewed and the readout electronics of the calorimeter and muon systems have been fully overhauled. The first stage of the all-software trigger is implemented on a GPU farm. The output of the trigger provides a combination of totally reconstructed physics objects, such as tracks and vertices, ready for final analysis, and of entire events which need further offline reprocessing. This scheme required a complete revision of the computing model and rewriting of the experiment's software. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.10515v2-abstract-full').style.display = 'none'; document.getElementById('2305.10515v2-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 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">All figures and tables, along with any supplementary material and additional information, are available at http://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-DP-2022-002.html (LHCb public pages)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> LHCb-DP-2022-002 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 19 (2024) P05065 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2301.00460">arXiv:2301.00460</a> <span> [<a href="https://arxiv.org/pdf/2301.00460">pdf</a>, <a href="https://arxiv.org/format/2301.00460">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> First Measurement of Neutron Birefringence in Polarized $^{129}$Xe and $^{131}$Xe Nuclei </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Lu%2C+H">H. Lu</a>, <a href="/search/physics?searchtype=author&query=Barlow%2C+M+J">M. J. Barlow</a>, <a href="/search/physics?searchtype=author&query=Basler%2C+D">D. Basler</a>, <a href="/search/physics?searchtype=author&query=Gutfreund%2C+P">P. Gutfreund</a>, <a href="/search/physics?searchtype=author&query=Holderer%2C+O">O. Holderer</a>, <a href="/search/physics?searchtype=author&query=Ioffe%2C+A">A. Ioffe</a>, <a href="/search/physics?searchtype=author&query=Pasini%2C+S">S. Pasini</a>, <a href="/search/physics?searchtype=author&query=Pistel%2C+P">P. Pistel</a>, <a href="/search/physics?searchtype=author&query=Salhi%2C+Z">Z. Salhi</a>, <a href="/search/physics?searchtype=author&query=Zhernenkov%2C+K">K. Zhernenkov</a>, <a href="/search/physics?searchtype=author&query=Goodson%2C+B+M">B. M. Goodson</a>, <a href="/search/physics?searchtype=author&query=Snow%2C+W+M">W. M. Snow</a>, <a href="/search/physics?searchtype=author&query=Babcock%2C+E">E. Babcock</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="2301.00460v1-abstract-short" style="display: inline;"> We present the first measurements of polarized neutron birefringence in transmission through nuclear-polarized $^{129}$Xe and $^{131}$Xe gas and determine the neutron incoherent scattering lengths $b_i(^{129}Xe)=0.186\pm(0.021)_{stat.}\pm(0.004)_{syst.}\space\text{ fm}$ and $b_i(^{131}Xe)=2.09\pm(0.29)_{stat.}\pm(0.12)_{syst.}\space\text{ fm}$ for the first time. These results determine the essent… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.00460v1-abstract-full').style.display = 'inline'; document.getElementById('2301.00460v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2301.00460v1-abstract-full" style="display: none;"> We present the first measurements of polarized neutron birefringence in transmission through nuclear-polarized $^{129}$Xe and $^{131}$Xe gas and determine the neutron incoherent scattering lengths $b_i(^{129}Xe)=0.186\pm(0.021)_{stat.}\pm(0.004)_{syst.}\space\text{ fm}$ and $b_i(^{131}Xe)=2.09\pm(0.29)_{stat.}\pm(0.12)_{syst.}\space\text{ fm}$ for the first time. These results determine the essential parameter needed for interpretation of spin-dependent neutron-scattering studies on polarized xenon ensembles, with possible future applications ranging from tests of time-reversal violation to mode-entangled neutron scattering experiments on nuclear-polarized systems. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.00460v1-abstract-full').style.display = 'none'; document.getElementById('2301.00460v1-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> 1 January, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 3 figures, submitted to PRL</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2201.08097">arXiv:2201.08097</a> <span> [<a href="https://arxiv.org/pdf/2201.08097">pdf</a>, <a href="https://arxiv.org/format/2201.08097">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="Nuclear Experiment">nucl-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.nucengdes.2021.111629">10.1016/j.nucengdes.2021.111629 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Calculations of neutron fluxes and isotope conversion rates in a thorium-fuelled MYRRHA reactor, using GEANT4 and MCNPX, Nuclear Engineering and Design </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rummana%2C+A">Asiya Rummana</a>, <a href="/search/physics?searchtype=author&query=Barlow%2C+R+J">Roger John Barlow</a>, <a href="/search/physics?searchtype=author&query=Saad%2C+S+M">Syed Mohammad Saad</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="2201.08097v1-abstract-short" style="display: inline;"> Neutronics calculations have been performed of the MYRRHA ADS Reactor with a thorium-based fuel mixture, using the simulation programs MCNPX (Waters, 2002) and Geant4 (Agostinelli, 2003). Thorium is often considered for ADS systems, and this is the first evaluation of the possibilities for thorium based fuels using a reactor design which has been developed in detail. It also extends the applicatio… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.08097v1-abstract-full').style.display = 'inline'; document.getElementById('2201.08097v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2201.08097v1-abstract-full" style="display: none;"> Neutronics calculations have been performed of the MYRRHA ADS Reactor with a thorium-based fuel mixture, using the simulation programs MCNPX (Waters, 2002) and Geant4 (Agostinelli, 2003). Thorium is often considered for ADS systems, and this is the first evaluation of the possibilities for thorium based fuels using a reactor design which has been developed in detail. It also extends the application of the widely-used Geant4 program to the geometry of MYRRHA and to thorium. An asymptotic 232Th/233U mixture is considered, together with the standard MOX fuel and a possible 232Th/MOX starter. Neutron fluxes and spectra are calculated at several regions in the core: fuel cells, IPS cells and the two (Mo and Ac) isotope production cells. These are then used for simple calculations of the fuel evolution and of the potential for the incineration of minor actinide waste. Results from the two programs agree and support each other and show that the thorium fuel is viable, and has good evolution/breeding properties, and that minor actinide incineration, though it will not take place on a significant scale, will be demonstrable. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.08097v1-abstract-full').style.display = 'none'; document.getElementById('2201.08097v1-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 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nuclear Engineering and Design, Volume 388, 2022, 111629, ISSN 0029-5493 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2105.03076">arXiv:2105.03076</a> <span> [<a href="https://arxiv.org/pdf/2105.03076">pdf</a>, <a href="https://arxiv.org/format/2105.03076">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Two-Orders-of-Magnitude Improvement in the Total Spin Angular Momentum of 131Xe Nuclei Using Spin Exchange Optical Pumping </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Molway%2C+M+J">Michael J. Molway</a>, <a href="/search/physics?searchtype=author&query=Bales-Shaffer%2C+L">Liana Bales-Shaffer</a>, <a href="/search/physics?searchtype=author&query=Ranta%2C+K">Kaili Ranta</a>, <a href="/search/physics?searchtype=author&query=Basler%2C+D">Dustin Basler</a>, <a href="/search/physics?searchtype=author&query=Murphy%2C+M">Megan Murphy</a>, <a href="/search/physics?searchtype=author&query=Kidd%2C+B+E">Bryce E. Kidd</a>, <a href="/search/physics?searchtype=author&query=Gafar%2C+A+T">Abdulbasit Tobi Gafar</a>, <a href="/search/physics?searchtype=author&query=Porter%2C+J">Justin Porter</a>, <a href="/search/physics?searchtype=author&query=Albin%2C+K">Kierstyn Albin</a>, <a href="/search/physics?searchtype=author&query=Goodson%2C+B+M">Boyd M. Goodson</a>, <a href="/search/physics?searchtype=author&query=Chekmenev%2C+E+Y">Eduard Y. Chekmenev</a>, <a href="/search/physics?searchtype=author&query=Rosen%2C+M+S">Matthew S. Rosen</a>, <a href="/search/physics?searchtype=author&query=Snow%2C+W+M">W. Michael Snow</a>, <a href="/search/physics?searchtype=author&query=Ball%2C+J">James Ball</a>, <a href="/search/physics?searchtype=author&query=Sparling%2C+E">Eleanor Sparling</a>, <a href="/search/physics?searchtype=author&query=Prince%2C+M">Mia Prince</a>, <a href="/search/physics?searchtype=author&query=Cocking%2C+D">Daniel Cocking</a>, <a href="/search/physics?searchtype=author&query=Barlow%2C+M+J">Michael J. Barlow</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="2105.03076v1-abstract-short" style="display: inline;"> We report on hyperpolarization of quadrupolar (I=3/2) 131Xe via spin-exchange optical pumping. Observations of the 131Xe polarization dynamics show that the effective alkali-metal/131Xe spin-exchange cross-sections are large enough to compete with 131Xe spin relaxation. 131Xe polarization up to 7.6 p/m 1.5 percent was achieved in ca. 8.5EE20 spins--a ca. 100-fold improvement in the total spin angu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.03076v1-abstract-full').style.display = 'inline'; document.getElementById('2105.03076v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2105.03076v1-abstract-full" style="display: none;"> We report on hyperpolarization of quadrupolar (I=3/2) 131Xe via spin-exchange optical pumping. Observations of the 131Xe polarization dynamics show that the effective alkali-metal/131Xe spin-exchange cross-sections are large enough to compete with 131Xe spin relaxation. 131Xe polarization up to 7.6 p/m 1.5 percent was achieved in ca. 8.5EE20 spins--a ca. 100-fold improvement in the total spin angular momentum--enabling applications including measurement of spin-dependent neutron-131Xe s-wave scattering and sensitive searches for time-reversal violation in neutron-131Xe interactions beyond the Standard Model. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.03076v1-abstract-full').style.display = 'none'; document.getElementById('2105.03076v1-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> 7 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">6 page main document plus 23 page Supplemental Information (SI) document</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2005.14272">arXiv:2005.14272</a> <span> [<a href="https://arxiv.org/pdf/2005.14272">pdf</a>, <a href="https://arxiv.org/format/2005.14272">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="Nuclear Experiment">nucl-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.2020.164807">10.1016/j.nima.2020.164807 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The GlueX Beamline and Detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Adhikari%2C+S">S. Adhikari</a>, <a href="/search/physics?searchtype=author&query=Akondi%2C+C+S">C. S. Akondi</a>, <a href="/search/physics?searchtype=author&query=Ghoul%2C+H+A">H. Al Ghoul</a>, <a href="/search/physics?searchtype=author&query=Ali%2C+A">A. Ali</a>, <a href="/search/physics?searchtype=author&query=Amaryan%2C+M">M. Amaryan</a>, <a href="/search/physics?searchtype=author&query=Anassontzis%2C+E+G">E. G. Anassontzis</a>, <a href="/search/physics?searchtype=author&query=Austregesilo%2C+A">A. Austregesilo</a>, <a href="/search/physics?searchtype=author&query=Barbosa%2C+F">F. Barbosa</a>, <a href="/search/physics?searchtype=author&query=Barlow%2C+J">J. Barlow</a>, <a href="/search/physics?searchtype=author&query=Barnes%2C+A">A. Barnes</a>, <a href="/search/physics?searchtype=author&query=Barriga%2C+E">E. Barriga</a>, <a href="/search/physics?searchtype=author&query=Barsotti%2C+R">R. Barsotti</a>, <a href="/search/physics?searchtype=author&query=Beattie%2C+T+D">T. D. Beattie</a>, <a href="/search/physics?searchtype=author&query=Benesch%2C+J">J. Benesch</a>, <a href="/search/physics?searchtype=author&query=Berdnikov%2C+V+V">V. V. Berdnikov</a>, <a href="/search/physics?searchtype=author&query=Biallas%2C+G">G. Biallas</a>, <a href="/search/physics?searchtype=author&query=Black%2C+T">T. Black</a>, <a href="/search/physics?searchtype=author&query=Boeglin%2C+W">W. Boeglin</a>, <a href="/search/physics?searchtype=author&query=Brindza%2C+P">P. Brindza</a>, <a href="/search/physics?searchtype=author&query=Briscoe%2C+W+J">W. J. Briscoe</a>, <a href="/search/physics?searchtype=author&query=Britton%2C+T">T. Britton</a>, <a href="/search/physics?searchtype=author&query=Brock%2C+J">J. Brock</a>, <a href="/search/physics?searchtype=author&query=Brooks%2C+W+K">W. K. Brooks</a>, <a href="/search/physics?searchtype=author&query=Cannon%2C+B+E">B. E. Cannon</a>, <a href="/search/physics?searchtype=author&query=Carlin%2C+C">C. Carlin</a> , et al. (165 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="2005.14272v2-abstract-short" style="display: inline;"> The GlueX experiment at Jefferson Lab has been designed to study photoproduction reactions with a 9-GeV linearly polarized photon beam. The energy and arrival time of beam photons are tagged using a scintillator hodoscope and a scintillating fiber array. The photon flux is determined using a pair spectrometer, while the linear polarization of the photon beam is determined using a polarimeter based… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.14272v2-abstract-full').style.display = 'inline'; document.getElementById('2005.14272v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2005.14272v2-abstract-full" style="display: none;"> The GlueX experiment at Jefferson Lab has been designed to study photoproduction reactions with a 9-GeV linearly polarized photon beam. The energy and arrival time of beam photons are tagged using a scintillator hodoscope and a scintillating fiber array. The photon flux is determined using a pair spectrometer, while the linear polarization of the photon beam is determined using a polarimeter based on triplet photoproduction. Charged-particle tracks from interactions in the central target are analyzed in a solenoidal field using a central straw-tube drift chamber and six packages of planar chambers with cathode strips and drift wires. Electromagnetic showers are reconstructed in a cylindrical scintillating fiber calorimeter inside the magnet and a lead-glass array downstream. Charged particle identification is achieved by measuring energy loss in the wire chambers and using the flight time of particles between the target and detectors outside the magnet. The signals from all detectors are recorded with flash ADCs and/or pipeline TDCs into memories allowing trigger decisions with a latency of 3.3 $渭$s. The detector operates routinely at trigger rates of 40 kHz and data rates of 600 megabytes per second. We describe the photon beam, the GlueX detector components, electronics, data-acquisition and monitoring systems, and the performance of the experiment during the first three years of operation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.14272v2-abstract-full').style.display = 'none'; document.getElementById('2005.14272v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">Accepted by Nuclear Instruments and Methods A, 78 pages, 54 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLAB-PHY-20-3195 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nucl. Instrum. & Meth. A987, 164807 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2004.10339">arXiv:2004.10339</a> <span> [<a href="https://arxiv.org/pdf/2004.10339">pdf</a>, <a href="https://arxiv.org/format/2004.10339">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="Nuclear Experiment">nucl-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.2020.164356">10.1016/j.nima.2020.164356 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The CLAS12 Backward Angle Neutron Detector (BAND) </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Segarra%2C+E+P">E. P. Segarra</a>, <a href="/search/physics?searchtype=author&query=Hauenstein%2C+F">F. Hauenstein</a>, <a href="/search/physics?searchtype=author&query=Schmidt%2C+A">A. Schmidt</a>, <a href="/search/physics?searchtype=author&query=Beck%2C+A">A. Beck</a>, <a href="/search/physics?searchtype=author&query=Beck%2C+S+M">S. May-Tal Beck</a>, <a href="/search/physics?searchtype=author&query=Cruz-Torres%2C+R">R. Cruz-Torres</a>, <a href="/search/physics?searchtype=author&query=Denniston%2C+A">A. Denniston</a>, <a href="/search/physics?searchtype=author&query=Hrnjic%2C+A">A. Hrnjic</a>, <a href="/search/physics?searchtype=author&query=Kutz%2C+T">T. Kutz</a>, <a href="/search/physics?searchtype=author&query=Nambrath%2C+A">A. Nambrath</a>, <a href="/search/physics?searchtype=author&query=Pybus%2C+J+R">J. R. Pybus</a>, <a href="/search/physics?searchtype=author&query=Pryce%2C+K">K. Pryce</a>, <a href="/search/physics?searchtype=author&query=Fogler%2C+C">C. Fogler</a>, <a href="/search/physics?searchtype=author&query=Hartlove%2C+T">T. Hartlove</a>, <a href="/search/physics?searchtype=author&query=Weinstein%2C+L+B">L. B. Weinstein</a>, <a href="/search/physics?searchtype=author&query=Vega%2C+J">J. Vega</a>, <a href="/search/physics?searchtype=author&query=Ungerer%2C+M">M. Ungerer</a>, <a href="/search/physics?searchtype=author&query=Hakobyan%2C+H">H. Hakobyan</a>, <a href="/search/physics?searchtype=author&query=Brooks%2C+W+K">W. K. Brooks</a>, <a href="/search/physics?searchtype=author&query=Piasetzky%2C+E">E. Piasetzky</a>, <a href="/search/physics?searchtype=author&query=Cohen%2C+E">E. Cohen</a>, <a href="/search/physics?searchtype=author&query=Duer%2C+M">M. Duer</a>, <a href="/search/physics?searchtype=author&query=Korover%2C+I">I. Korover</a>, <a href="/search/physics?searchtype=author&query=Barlow%2C+J">J. Barlow</a>, <a href="/search/physics?searchtype=author&query=Barriga%2C+E">E. Barriga</a> , et al. (3 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="2004.10339v2-abstract-short" style="display: inline;"> The Backward Angle Neutron Detector (BAND) of CLAS12 detects neutrons emitted at backward angles of $155^\circ$ to $175^\circ$, with momenta between $200$ and $600$ MeV/c. It is positioned 3 meters upstream of the target, consists of $18$ rows and $5$ layers of $7.2$ cm by $7.2$ cm scintillator bars, and read out on both ends by PMTs to measure time and energy deposition in the scintillator layers… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.10339v2-abstract-full').style.display = 'inline'; document.getElementById('2004.10339v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2004.10339v2-abstract-full" style="display: none;"> The Backward Angle Neutron Detector (BAND) of CLAS12 detects neutrons emitted at backward angles of $155^\circ$ to $175^\circ$, with momenta between $200$ and $600$ MeV/c. It is positioned 3 meters upstream of the target, consists of $18$ rows and $5$ layers of $7.2$ cm by $7.2$ cm scintillator bars, and read out on both ends by PMTs to measure time and energy deposition in the scintillator layers. Between the target and BAND there is a 2 cm thick lead wall followed by a 2 cm veto layer to suppress gammas and reject charged particles. This paper discusses the component-selection tests and the detector assembly. Timing calibrations (including offsets and time-walk) were performed using a novel pulsed-laser calibration system, resulting in time resolutions better than $250$ ps (150 ps) for energy depositions above 2 MeVee (5 MeVee). Cosmic rays and a variety of radioactive sources were used to calibration the energy response of the detector. Scintillator bar attenuation lengths were measured. The time resolution results in a neutron momentum reconstruction resolution, $未p/p < 1.5$\% for neutron momentum $200\le p\le 600$ MeV/c. Final performance of the BAND with CLAS12 is shown, including electron-neutral particle timing spectra and a discussion of the off-time neutral contamination as a function of energy deposition threshold. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.10339v2-abstract-full').style.display = 'none'; document.getElementById('2004.10339v2-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 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 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">17 pages, 25 figures, 3 tables. Accepted for publication in NIM-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/1905.12362">arXiv:1905.12362</a> <span> [<a href="https://arxiv.org/pdf/1905.12362">pdf</a>, <a href="https://arxiv.org/format/1905.12362">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Data Analysis, Statistics and Probability">physics.data-an</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/10.23730/CYRSP-2020-005.149">10.23730/CYRSP-2020-005.149 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Practical Statistics for Particle Physics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Barlow%2C+R+J">Roger John Barlow</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="1905.12362v2-abstract-short" style="display: inline;"> This is the write-up of a set of lectures given at the Asia Europe Pacific School of High Energy Physics in Quy Nhon, Vietnam in September 2018, to an audience of PhD students in all branches of particle physics They cover the different meanings of 'probability', particularly frequentist and Bayesian, the binomial, Poisson and Gaussian distributions, hypothesis testing, estimation, errors (includi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.12362v2-abstract-full').style.display = 'inline'; document.getElementById('1905.12362v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.12362v2-abstract-full" style="display: none;"> This is the write-up of a set of lectures given at the Asia Europe Pacific School of High Energy Physics in Quy Nhon, Vietnam in September 2018, to an audience of PhD students in all branches of particle physics They cover the different meanings of 'probability', particularly frequentist and Bayesian, the binomial, Poisson and Gaussian distributions, hypothesis testing, estimation, errors (including asymmetric and systematic errors) and goodness of fit. Several different methods used in setting upper limits are explained, followed by a discussion on why 5 sigma are conventionally required for a 'discovery'. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.12362v2-abstract-full').style.display = 'none'; document.getElementById('1905.12362v2-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 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-2020-0005 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1712.06991">arXiv:1712.06991</a> <span> [<a href="https://arxiv.org/pdf/1712.06991">pdf</a>, <a href="https://arxiv.org/format/1712.06991">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> </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/10.23732/CYRCP-2018-002">10.23732/CYRCP-2018-002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Status of MERLIN </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rafique%2C+H">Haroon Rafique</a>, <a href="/search/physics?searchtype=author&query=Appleby%2C+R+B">Robert B Appleby</a>, <a href="/search/physics?searchtype=author&query=Barlow%2C+R+J">Roger J Barlow</a>, <a href="/search/physics?searchtype=author&query=Molson%2C+J+G">James G Molson</a>, <a href="/search/physics?searchtype=author&query=Tygier%2C+S">Sam Tygier</a>, <a href="/search/physics?searchtype=author&query=Valloni%2C+A">Alessandra Valloni</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="1712.06991v2-abstract-short" style="display: inline;"> MERLIN is an accelerator physics library written in C++ which can be used for a range of accelerator tracking simulations, including collimation in hadron colliders. Recently MERLIN has been upgraded to provide a robust tool for HL-LHC collimation, including the treatment of composite materials, and a hollow electron lens process. We describe the features of MERLIN used in collimation simulations. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1712.06991v2-abstract-full" style="display: none;"> MERLIN is an accelerator physics library written in C++ which can be used for a range of accelerator tracking simulations, including collimation in hadron colliders. Recently MERLIN has been upgraded to provide a robust tool for HL-LHC collimation, including the treatment of composite materials, and a hollow electron lens process. We describe the features of MERLIN used in collimation simulations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1712.06991v2-abstract-full').style.display = 'none'; document.getElementById('1712.06991v2-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 March, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 December, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Proceedings of "Tracking Collimation" ICFA Workshop, CERN Yellow Reports: Conference Proceedings, Vol 2 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1701.03701">arXiv:1701.03701</a> <span> [<a href="https://arxiv.org/pdf/1701.03701">pdf</a>, <a href="https://arxiv.org/ps/1701.03701">ps</a>, <a href="https://arxiv.org/format/1701.03701">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Data Analysis, Statistics and Probability">physics.data-an</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"> Combining Experiments with Systematic Errors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Barlow%2C+R+J">Roger John Barlow</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="1701.03701v2-abstract-short" style="display: inline;"> We consider fits to two or more datasets for which results from the sa me experiment share a common systematic uncertainty in addition to their individ ual statistical errors. This is important in extracting the maximum information from a set of similar bu t different experiments (or the same experiment under different conditions) an alysing similar but different datasets, as happens at the LHC an… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1701.03701v2-abstract-full').style.display = 'inline'; document.getElementById('1701.03701v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1701.03701v2-abstract-full" style="display: none;"> We consider fits to two or more datasets for which results from the sa me experiment share a common systematic uncertainty in addition to their individ ual statistical errors. This is important in extracting the maximum information from a set of similar bu t different experiments (or the same experiment under different conditions) an alysing similar but different datasets, as happens at the LHC and other particle colliders. There are two techniques in use: using the full matrix and using extra paramneters, and we show, for a completely general fit, that for an addit ive uncertainty they are in principle equivalent even though in practice the det ails differ. For a multiplicative error the matrix fit is equivalent to the extra parameter fit if the factor is applied to the data points but not if it is applied to the function: the former leads to biassed estimates and the latter avoids them. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1701.03701v2-abstract-full').style.display = 'none'; document.getElementById('1701.03701v2-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 September, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 January, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2017. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1604.07327">arXiv:1604.07327</a> <span> [<a href="https://arxiv.org/pdf/1604.07327">pdf</a>, <a href="https://arxiv.org/format/1604.07327">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epjc/s10052-016-4363-7">10.1140/epjc/s10052-016-4363-7 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Practical Pomeron for High Energy Proton Collimation </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Appleby%2C+R+B">R. B. Appleby</a>, <a href="/search/physics?searchtype=author&query=Barlow%2C+R+J">R. J. Barlow</a>, <a href="/search/physics?searchtype=author&query=Molson%2C+J+G">J. G Molson</a>, <a href="/search/physics?searchtype=author&query=Serluca%2C+M">M. Serluca</a>, <a href="/search/physics?searchtype=author&query=Toader%2C+A">A. Toader</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="1604.07327v1-abstract-short" style="display: inline;"> We present a model which describes proton scattering data from ISR to Tevatron energies, and which can be applied to collimation n high energy accelerators, such as the LHC and FCC. Collimators remove beam halo particles, so that they do not impinge on vulnerable regions of the machine, such as the superconducting magnets and the experimental areas. In simulating the effect of the collimator jaws… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1604.07327v1-abstract-full').style.display = 'inline'; document.getElementById('1604.07327v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1604.07327v1-abstract-full" style="display: none;"> We present a model which describes proton scattering data from ISR to Tevatron energies, and which can be applied to collimation n high energy accelerators, such as the LHC and FCC. Collimators remove beam halo particles, so that they do not impinge on vulnerable regions of the machine, such as the superconducting magnets and the experimental areas. In simulating the effect of the collimator jaws it is crucial to model the scattering of protons at small momentum transfer~$t$,as these protons can subsequently survive several turns of the ring before being lost. At high energies these soft processes are well described by Pomeron exchange models. We study the behaviour of elastic and single-diffractive dissociation cross sections over a wide range of energy, and show that the model can be used as a global description of the wide variety of high energy elastic and diffractive data presently available. In particular it models low mass diffraction dissociation, where a rich resonance structure is present, and thus predicts the differential and integrated cross sections in the kinematical range appropriate to the LHC.We incorporate the physics of this model into the beam tracking code MERLIN and use it to simulate the resulting loss maps of the beam halo lost in the collimators in the LHC. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1604.07327v1-abstract-full').style.display = 'none'; document.getElementById('1604.07327v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 April, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">23 pages, 25 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/1310.0804">arXiv:1310.0804</a> <span> [<a href="https://arxiv.org/pdf/1310.0804">pdf</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> </div> </div> <p class="title is-5 mathjax"> Accelerator system for the PRISM based muon to electron conversion experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Alekou%2C+A">A. Alekou</a>, <a href="/search/physics?searchtype=author&query=Appleby%2C+R">R. Appleby</a>, <a href="/search/physics?searchtype=author&query=Aslaninejad%2C+M">M. Aslaninejad</a>, <a href="/search/physics?searchtype=author&query=Barlow%2C+R+J">R. J. Barlow</a>, <a href="/search/physics?searchtype=author&query=Hock%2C+R+C+K+M">R. Chudzinski K. M. Hock</a>, <a href="/search/physics?searchtype=author&query=Garland%2C+J">J. Garland</a>, <a href="/search/physics?searchtype=author&query=Jenner%2C+L+J">L. J. Jenner</a>, <a href="/search/physics?searchtype=author&query=Kelliher%2C+D+J">D. J. Kelliher</a>, <a href="/search/physics?searchtype=author&query=Kuno%2C+Y">Y. Kuno</a>, <a href="/search/physics?searchtype=author&query=Kurup%2C+A">A. Kurup</a>, <a href="/search/physics?searchtype=author&query=Lagrange%2C+J">J-B. Lagrange</a>, <a href="/search/physics?searchtype=author&query=Lancaster%2C+M">M. Lancaster</a>, <a href="/search/physics?searchtype=author&query=Machida%2C+S">S. Machida</a>, <a href="/search/physics?searchtype=author&query=Mori%2C+Y">Y. Mori</a>, <a href="/search/physics?searchtype=author&query=Muratori%2C+B">B. Muratori</a>, <a href="/search/physics?searchtype=author&query=Ohmori%2C+C">C. Ohmori</a>, <a href="/search/physics?searchtype=author&query=Owen%2C+H">H. Owen</a>, <a href="/search/physics?searchtype=author&query=Pasternak%2C+J">J. Pasternak</a>, <a href="/search/physics?searchtype=author&query=Planche%2C+T">T. Planche</a>, <a href="/search/physics?searchtype=author&query=Prior%2C+C">C. Prior</a>, <a href="/search/physics?searchtype=author&query=Sato%2C+A">A. Sato</a>, <a href="/search/physics?searchtype=author&query=Shi%2C+Y">Y. Shi</a>, <a href="/search/physics?searchtype=author&query=Smith%2C+S">S. Smith</a>, <a href="/search/physics?searchtype=author&query=Uchida%2C+Y">Y. Uchida</a>, <a href="/search/physics?searchtype=author&query=Witte%2C+H">H. Witte</a> , et al. (1 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="1310.0804v1-abstract-short" style="display: inline;"> The next generation of lepton flavor violation experiments need high intensity and high quality muon beams. Production of such beams requires sending a short, high intensity proton pulse to the pion production target, capturing pions and collecting the resulting muons in the large acceptance transport system. The substantial increase of beam quality can be obtained by applying the RF phase rotatio… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1310.0804v1-abstract-full').style.display = 'inline'; document.getElementById('1310.0804v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1310.0804v1-abstract-full" style="display: none;"> The next generation of lepton flavor violation experiments need high intensity and high quality muon beams. Production of such beams requires sending a short, high intensity proton pulse to the pion production target, capturing pions and collecting the resulting muons in the large acceptance transport system. The substantial increase of beam quality can be obtained by applying the RF phase rotation on the muon beam in the dedicated FFAG ring, which was proposed for the PRISM project.This allows to reduce the momentum spread of the beam and to purify from the unwanted components like pions or secondary protons. A PRISM Task Force is addressing the accelerator and detector issues that need to be solved in order to realize the PRISM experiment. The parameters of the required proton beam, the principles of the PRISM experiment and the baseline FFAG design are introduced. The spectrum of alternative designs for the PRISM FFAG ring are shown. Progress on ring main systems like injection and RF are presented. The current status of the study and its future directions are discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1310.0804v1-abstract-full').style.display = 'none'; document.getElementById('1310.0804v1-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 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">Studies performed within the PRISM Task Force initiative</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1110.2866">arXiv:1110.2866</a> <span> [<a href="https://arxiv.org/pdf/1110.2866">pdf</a>, <a href="https://arxiv.org/format/1110.2866">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/7/01/P01010">10.1088/1748-0221/7/01/P01010 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Absolute luminosity measurements with the LHCb detector at the LHC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=The+LHCb+Collaboration"> The LHCb Collaboration</a>, <a href="/search/physics?searchtype=author&query=Aaij%2C+R">R. Aaij</a>, <a href="/search/physics?searchtype=author&query=Adeva%2C+B">B. Adeva</a>, <a href="/search/physics?searchtype=author&query=Adinolfi%2C+M">M. Adinolfi</a>, <a href="/search/physics?searchtype=author&query=Adrover%2C+C">C. Adrover</a>, <a href="/search/physics?searchtype=author&query=Affolder%2C+A">A. Affolder</a>, <a href="/search/physics?searchtype=author&query=Ajaltouni%2C+Z">Z. Ajaltouni</a>, <a href="/search/physics?searchtype=author&query=Albrecht%2C+J">J. Albrecht</a>, <a href="/search/physics?searchtype=author&query=Alessio%2C+F">F. Alessio</a>, <a href="/search/physics?searchtype=author&query=Alexander%2C+M">M. Alexander</a>, <a href="/search/physics?searchtype=author&query=Alkhazov%2C+G">G. Alkhazov</a>, <a href="/search/physics?searchtype=author&query=Cartelle%2C+P+A">P. Alvarez Cartelle</a>, <a href="/search/physics?searchtype=author&query=Alves%2C+A+A">A. A. Alves Jr</a>, <a href="/search/physics?searchtype=author&query=Amato%2C+S">S. Amato</a>, <a href="/search/physics?searchtype=author&query=Amhis%2C+Y">Y. Amhis</a>, <a href="/search/physics?searchtype=author&query=Anderson%2C+J">J. Anderson</a>, <a href="/search/physics?searchtype=author&query=Appleby%2C+R+B">R. B. Appleby</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+O+A">O. Aquines Gutierrez</a>, <a href="/search/physics?searchtype=author&query=Archilli%2C+F">F. Archilli</a>, <a href="/search/physics?searchtype=author&query=Arrabito%2C+L">L. Arrabito</a>, <a href="/search/physics?searchtype=author&query=Artamonov%2C+A">A. Artamonov</a>, <a href="/search/physics?searchtype=author&query=Artuso%2C+M">M. Artuso</a>, <a href="/search/physics?searchtype=author&query=Aslanides%2C+E">E. Aslanides</a>, <a href="/search/physics?searchtype=author&query=Auriemma%2C+G">G. Auriemma</a>, <a href="/search/physics?searchtype=author&query=Bachmann%2C+S">S. Bachmann</a> , et al. (549 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1110.2866v2-abstract-short" style="display: inline;"> Absolute luminosity measurements are of general interest for colliding-beam experiments at storage rings. These measurements are necessary to determine the absolute cross-sections of reaction processes and are valuable to quantify the performance of the accelerator. Using data taken in 2010, LHCb has applied two methods to determine the absolute scale of its luminosity measurements for proton-prot… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1110.2866v2-abstract-full').style.display = 'inline'; document.getElementById('1110.2866v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1110.2866v2-abstract-full" style="display: none;"> Absolute luminosity measurements are of general interest for colliding-beam experiments at storage rings. These measurements are necessary to determine the absolute cross-sections of reaction processes and are valuable to quantify the performance of the accelerator. Using data taken in 2010, LHCb has applied two methods to determine the absolute scale of its luminosity measurements for proton-proton collisions at the LHC with a centre-of-mass energy of 7 TeV. In addition to the classic "van der Meer scan" method a novel technique has been developed which makes use of direct imaging of the individual beams using beam-gas and beam-beam interactions. This beam imaging method is made possible by the high resolution of the LHCb vertex detector and the close proximity of the detector to the beams, and allows beam parameters such as positions, angles and widths to be determined. The results of the two methods have comparable precision and are in good agreement. Combining the two methods, an overall precision of 3.5% in the absolute luminosity determination is reached. The techniques used to transport the absolute luminosity calibration to the full 2010 data-taking period are presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1110.2866v2-abstract-full').style.display = 'none'; document.getElementById('1110.2866v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 January, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 October, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">48 pages, 19 figures. Results unchanged, improved clarity of Table 6, 9 and 10 and corresponding explanation in the text</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> LHCb-PAPER-2011-015; CERN-PH-EP-2011-157 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> 2012 JINST 7 P01010 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1004.4996">arXiv:1004.4996</a> <span> [<a href="https://arxiv.org/pdf/1004.4996">pdf</a>, <a href="https://arxiv.org/ps/1004.4996">ps</a>, <a href="https://arxiv.org/format/1004.4996">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/10.1088/1748-0221/5/05/P05007">10.1088/1748-0221/5/05/P05007 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Study of the interactions of pions in the CALICE silicon-tungsten calorimeter prototype </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Adloff%2C+C">C. Adloff</a>, <a href="/search/physics?searchtype=author&query=Karyotakis%2C+Y">Y. Karyotakis</a>, <a href="/search/physics?searchtype=author&query=Repond%2C+J">J. Repond</a>, <a href="/search/physics?searchtype=author&query=Yu%2C+J">J. Yu</a>, <a href="/search/physics?searchtype=author&query=Eigen%2C+G">G. Eigen</a>, <a href="/search/physics?searchtype=author&query=Mikami%2C+Y">Y. Mikami</a>, <a href="/search/physics?searchtype=author&query=Watson%2C+N+K">N. K. Watson</a>, <a href="/search/physics?searchtype=author&query=Wilson%2C+J+A">J. A. Wilson</a>, <a href="/search/physics?searchtype=author&query=Goto%2C+T">T. Goto</a>, <a href="/search/physics?searchtype=author&query=Mavromanolakis%2C+G">G. Mavromanolakis</a>, <a href="/search/physics?searchtype=author&query=Thomson%2C+M+A">M. A. Thomson</a>, <a href="/search/physics?searchtype=author&query=Ward%2C+D+R">D. R. Ward</a>, <a href="/search/physics?searchtype=author&query=Yan%2C+W">W. Yan</a>, <a href="/search/physics?searchtype=author&query=Benchekroun%2C+D">D. Benchekroun</a>, <a href="/search/physics?searchtype=author&query=Hoummada%2C+A">A. Hoummada</a>, <a href="/search/physics?searchtype=author&query=Khoulaki%2C+Y">Y. Khoulaki</a>, <a href="/search/physics?searchtype=author&query=Apostolakis%2C+J">J. Apostolakis</a>, <a href="/search/physics?searchtype=author&query=Ribon%2C+A">A. Ribon</a>, <a href="/search/physics?searchtype=author&query=Uzhinskiy%2C+V">V. Uzhinskiy</a>, <a href="/search/physics?searchtype=author&query=Benyamna%2C+M">M. Benyamna</a>, <a href="/search/physics?searchtype=author&query=C%C3%A2rloganu%2C+C">C. C芒rloganu</a>, <a href="/search/physics?searchtype=author&query=Fehr%2C+F">F. Fehr</a>, <a href="/search/physics?searchtype=author&query=Gay%2C+P">P. Gay</a>, <a href="/search/physics?searchtype=author&query=Blazey%2C+G+C">G. C. Blazey</a>, <a href="/search/physics?searchtype=author&query=Chakraborty%2C+D">D. Chakraborty</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="1004.4996v1-abstract-short" style="display: inline;"> A prototype silicon-tungsten electromagnetic calorimeter for an ILC detector was tested in 2007 at the CERN SPS test beam. Data were collected with electron and hadron beams in the energy range 8 to 80 GeV. The analysis described here focuses on the interactions of pions in the calorimeter. One of the main objectives of the CALICE program is to validate the Monte Carlo tools available for the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1004.4996v1-abstract-full').style.display = 'inline'; document.getElementById('1004.4996v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1004.4996v1-abstract-full" style="display: none;"> A prototype silicon-tungsten electromagnetic calorimeter for an ILC detector was tested in 2007 at the CERN SPS test beam. Data were collected with electron and hadron beams in the energy range 8 to 80 GeV. The analysis described here focuses on the interactions of pions in the calorimeter. One of the main objectives of the CALICE program is to validate the Monte Carlo tools available for the design of a full-sized detector. The interactions of pions in the Si-W calorimeter are therefore confronted with the predictions of various physical models implemented in the GEANT4 simulation framework. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1004.4996v1-abstract-full').style.display = 'none'; document.getElementById('1004.4996v1-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 April, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2010. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 5:P05007,2010 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1003.2662">arXiv:1003.2662</a> <span> [<a href="https://arxiv.org/pdf/1003.2662">pdf</a>, <a href="https://arxiv.org/format/1003.2662">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/10.1088/1748-0221/5/05/P05004">10.1088/1748-0221/5/05/P05004 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Construction and Commissioning of the CALICE Analog Hadron Calorimeter Prototype </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Adloff%2C+C">C. Adloff</a>, <a href="/search/physics?searchtype=author&query=Karyotakis%2C+Y">Y. Karyotakis</a>, <a href="/search/physics?searchtype=author&query=Repond%2C+J">J. Repond</a>, <a href="/search/physics?searchtype=author&query=Brandt%2C+A">A. Brandt</a>, <a href="/search/physics?searchtype=author&query=Brown%2C+H">H. Brown</a>, <a href="/search/physics?searchtype=author&query=De%2C+K">K. De</a>, <a href="/search/physics?searchtype=author&query=Medina%2C+C">C. Medina</a>, <a href="/search/physics?searchtype=author&query=Smith%2C+J">J. Smith</a>, <a href="/search/physics?searchtype=author&query=Li%2C+J">J. Li</a>, <a href="/search/physics?searchtype=author&query=Sosebee%2C+M">M. Sosebee</a>, <a href="/search/physics?searchtype=author&query=White%2C+A">A. White</a>, <a href="/search/physics?searchtype=author&query=Yu%2C+J">J. Yu</a>, <a href="/search/physics?searchtype=author&query=Buanes%2C+T">T. Buanes</a>, <a href="/search/physics?searchtype=author&query=Eigen%2C+G">G. Eigen</a>, <a href="/search/physics?searchtype=author&query=Mikami%2C+Y">Y. Mikami</a>, <a href="/search/physics?searchtype=author&query=Miller%2C+O">O. Miller</a>, <a href="/search/physics?searchtype=author&query=Watson%2C+N+K">N. K. Watson</a>, <a href="/search/physics?searchtype=author&query=Wilson%2C+J+A">J. A. Wilson</a>, <a href="/search/physics?searchtype=author&query=Goto%2C+T">T. Goto</a>, <a href="/search/physics?searchtype=author&query=Mavromanolakis%2C+G">G. Mavromanolakis</a>, <a href="/search/physics?searchtype=author&query=Thomson%2C+M+A">M. A. Thomson</a>, <a href="/search/physics?searchtype=author&query=Ward%2C+D+R">D. R. Ward</a>, <a href="/search/physics?searchtype=author&query=Yan%2C+W">W. Yan</a>, <a href="/search/physics?searchtype=author&query=Benchekroun%2C+D">D. Benchekroun</a>, <a href="/search/physics?searchtype=author&query=Hoummada%2C+A">A. Hoummada</a> , et al. (205 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="1003.2662v1-abstract-short" style="display: inline;"> An analog hadron calorimeter (AHCAL) prototype of 5.3 nuclear interaction lengths thickness has been constructed by members of the CALICE Collaboration. The AHCAL prototype consists of a 38-layer sandwich structure of steel plates and highly-segmented scintillator tiles that are read out by wavelength-shifting fibers coupled to SiPMs. The signal is amplified and shaped with a custom-designed ASIC.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1003.2662v1-abstract-full').style.display = 'inline'; document.getElementById('1003.2662v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1003.2662v1-abstract-full" style="display: none;"> An analog hadron calorimeter (AHCAL) prototype of 5.3 nuclear interaction lengths thickness has been constructed by members of the CALICE Collaboration. The AHCAL prototype consists of a 38-layer sandwich structure of steel plates and highly-segmented scintillator tiles that are read out by wavelength-shifting fibers coupled to SiPMs. The signal is amplified and shaped with a custom-designed ASIC. A calibration/monitoring system based on LED light was developed to monitor the SiPM gain and to measure the full SiPM response curve in order to correct for non-linearity. Ultimately, the physics goals are the study of hadron shower shapes and testing the concept of particle flow. The technical goal consists of measuring the performance and reliability of 7608 SiPMs. The AHCAL was commissioned in test beams at DESY and CERN. The entire prototype was completed in 2007 and recorded hadron showers, electron showers and muons at different energies and incident angles in test beams at CERN and Fermilab. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1003.2662v1-abstract-full').style.display = 'none'; document.getElementById('1003.2662v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 March, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2010. </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">36 pages, 32 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY 10-032 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 5 (2010) P05004 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0901.0860">arXiv:0901.0860</a> <span> [<a href="https://arxiv.org/pdf/0901.0860">pdf</a>, <a href="https://arxiv.org/ps/0901.0860">ps</a>, <a href="https://arxiv.org/format/0901.0860">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> </div> </div> <p class="title is-5 mathjax"> Computation of Resistive Wakefields </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Toader%2C+A+M">Adina M Toader</a>, <a href="/search/physics?searchtype=author&query=Barlow%2C+R+J">Roger J Barlow</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="0901.0860v1-abstract-short" style="display: inline;"> We evaluate longitudinal resistive wakefields for cylindrical beam pipes numerically and compare the results with existing approximate formul忙. We consider an ultra-relativistic bunch traversing a cylindrical, metallic tube for a model in which the wall conductivity is taken to be first independent and second dependent on frequency, and we show how these can be included simply and efficiently in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0901.0860v1-abstract-full').style.display = 'inline'; document.getElementById('0901.0860v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0901.0860v1-abstract-full" style="display: none;"> We evaluate longitudinal resistive wakefields for cylindrical beam pipes numerically and compare the results with existing approximate formul忙. We consider an ultra-relativistic bunch traversing a cylindrical, metallic tube for a model in which the wall conductivity is taken to be first independent and second dependent on frequency, and we show how these can be included simply and efficiently in particle tracking simulations. We also extend this to higher order modes, and to the transverse wakes. This full treatment can be necessary in the design of modern nano-beam accelerators. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0901.0860v1-abstract-full').style.display = 'none'; document.getElementById('0901.0860v1-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> 7 January, 2009; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2009. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0805.4833">arXiv:0805.4833</a> <span> [<a href="https://arxiv.org/pdf/0805.4833">pdf</a>, <a href="https://arxiv.org/ps/0805.4833">ps</a>, <a href="https://arxiv.org/format/0805.4833">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/10.1088/1748-0221/3/08/P08001">10.1088/1748-0221/3/08/P08001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Design and Electronics Commissioning of the Physics Prototype of a Si-W Electromagnetic Calorimeter for the International Linear Collider </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=CALICE+Collaboration"> CALICE Collaboration</a>, <a href="/search/physics?searchtype=author&query=Repond%2C+J">J. Repond</a>, <a href="/search/physics?searchtype=author&query=Yu%2C+J">J. Yu</a>, <a href="/search/physics?searchtype=author&query=Hawkes%2C+C+M">C. M. Hawkes</a>, <a href="/search/physics?searchtype=author&query=Mikami%2C+Y">Y. Mikami</a>, <a href="/search/physics?searchtype=author&query=Miller%2C+O">O. Miller</a>, <a href="/search/physics?searchtype=author&query=Watson%2C+N+K">N. K. Watson</a>, <a href="/search/physics?searchtype=author&query=Wilson%2C+J+A">J. A. Wilson</a>, <a href="/search/physics?searchtype=author&query=Mavromanolakis%2C+G">G. Mavromanolakis</a>, <a href="/search/physics?searchtype=author&query=Thomson%2C+M+A">M. A. Thomson</a>, <a href="/search/physics?searchtype=author&query=Ward%2C+D+R">D. R. Ward</a>, <a href="/search/physics?searchtype=author&query=Yan%2C+W">W. Yan</a>, <a href="/search/physics?searchtype=author&query=Badaud%2C+F">F. Badaud</a>, <a href="/search/physics?searchtype=author&query=Boumediene%2C+D">D. Boumediene</a>, <a href="/search/physics?searchtype=author&query=Carloganu%2C+C">C. Carloganu</a>, <a href="/search/physics?searchtype=author&query=Cornat%2C+R">R. Cornat</a>, <a href="/search/physics?searchtype=author&query=Gay%2C+P">P. Gay</a>, <a href="/search/physics?searchtype=author&query=Gris%2C+P">Ph. Gris</a>, <a href="/search/physics?searchtype=author&query=Manen%2C+S">S. Manen</a>, <a href="/search/physics?searchtype=author&query=Morisseau%2C+F">F. Morisseau</a>, <a href="/search/physics?searchtype=author&query=Royer%2C+L">L. Royer</a>, <a href="/search/physics?searchtype=author&query=Blazey%2C+G+C">G. C. Blazey</a>, <a href="/search/physics?searchtype=author&query=Chakraborty%2C+D">D. Chakraborty</a>, <a href="/search/physics?searchtype=author&query=Dyshkant%2C+A">A. Dyshkant</a>, <a href="/search/physics?searchtype=author&query=Francis%2C+K">K. Francis</a> , et al. (92 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="0805.4833v2-abstract-short" style="display: inline;"> The CALICE collaboration is studying the design of high performance electromagnetic and hadronic calorimeters for future International Linear Collider detectors. For the electromagnetic calorimeter, the current baseline choice is a high granularity sampling calorimeter with tungsten as absorber and silicon detectors as sensitive material. A ``physics prototype'' has been constructed, consisting… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0805.4833v2-abstract-full').style.display = 'inline'; document.getElementById('0805.4833v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0805.4833v2-abstract-full" style="display: none;"> The CALICE collaboration is studying the design of high performance electromagnetic and hadronic calorimeters for future International Linear Collider detectors. For the electromagnetic calorimeter, the current baseline choice is a high granularity sampling calorimeter with tungsten as absorber and silicon detectors as sensitive material. A ``physics prototype'' has been constructed, consisting of thirty sensitive layers. Each layer has an active area of 18x18 cm2 and a pad size of 1x1 cm2. The absorber thickness totals 24 radiation lengths. It has been exposed in 2006 and 2007 to electron and hadron beams at the DESY and CERN beam test facilities, using a wide range of beam energies and incidence angles. In this paper, the prototype and the data acquisition chain are described and a summary of the data taken in the 2006 beam tests is presented. The methods used to subtract the pedestals and calibrate the detector are detailed. The signal-over-noise ratio has been measured at 7.63 +/- 0.01. Some electronics features have been observed; these lead to coherent noise and crosstalk between pads, and also crosstalk between sensitive and passive areas. The performance achieved in terms of uniformity and stability is presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0805.4833v2-abstract-full').style.display = 'none'; document.getElementById('0805.4833v2-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> 5 August, 2008; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 May, 2008; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2008. </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">Content modified: minor review corrections implemented</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 3:P08001,2008 </p> </li> </ol> <div 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