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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/2310.05669">arXiv:2310.05669</a> <span> [<a href="https://arxiv.org/pdf/2310.05669">pdf</a>, <a href="https://arxiv.org/format/2310.05669">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> <p class="title is-5 mathjax"> Transverse Emittance Reduction in Muon Beams by Ionization Cooling </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=The+MICE+Collaboration"> The MICE Collaboration</a>, <a href="/search/physics?searchtype=author&query=Bogomilov%2C+M">M. Bogomilov</a>, <a href="/search/physics?searchtype=author&query=Tsenov%2C+R">R. Tsenov</a>, <a href="/search/physics?searchtype=author&query=Vankova-Kirilova%2C+G">G. Vankova-Kirilova</a>, <a href="/search/physics?searchtype=author&query=Song%2C+Y+P">Y. P. Song</a>, <a href="/search/physics?searchtype=author&query=Tang%2C+J+Y">J. Y. Tang</a>, <a href="/search/physics?searchtype=author&query=Li%2C+Z+H">Z. H. Li</a>, <a href="/search/physics?searchtype=author&query=Bertoni%2C+R">R. Bertoni</a>, <a href="/search/physics?searchtype=author&query=Bonesini%2C+M">M. Bonesini</a>, <a href="/search/physics?searchtype=author&query=Chignoli%2C+F">F. Chignoli</a>, <a href="/search/physics?searchtype=author&query=Mazza%2C+R">R. Mazza</a>, <a href="/search/physics?searchtype=author&query=de+Bari%2C+A">A. de Bari</a>, <a href="/search/physics?searchtype=author&query=Orestano%2C+D">D. Orestano</a>, <a href="/search/physics?searchtype=author&query=Tortora%2C+L">L. Tortora</a>, <a href="/search/physics?searchtype=author&query=Kuno%2C+Y">Y. Kuno</a>, <a href="/search/physics?searchtype=author&query=Sakamoto%2C+H">H. Sakamoto</a>, <a href="/search/physics?searchtype=author&query=Sato%2C+A">A. Sato</a>, <a href="/search/physics?searchtype=author&query=Ishimoto%2C+S">S. Ishimoto</a>, <a href="/search/physics?searchtype=author&query=Chung%2C+M">M. Chung</a>, <a href="/search/physics?searchtype=author&query=Sung%2C+C+K">C. K. Sung</a>, <a href="/search/physics?searchtype=author&query=Filthaut%2C+F">F. Filthaut</a>, <a href="/search/physics?searchtype=author&query=Fedorov%2C+M">M. Fedorov</a>, <a href="/search/physics?searchtype=author&query=Jokovic%2C+D">D. Jokovic</a>, <a href="/search/physics?searchtype=author&query=Maletic%2C+D">D. Maletic</a>, <a href="/search/physics?searchtype=author&query=Savic%2C+M">M. Savic</a> , et al. (112 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="2310.05669v2-abstract-short" style="display: inline;"> Accelerated muon beams have been considered for next-generation studies of high-energy lepton-antilepton collisions and neutrino oscillations. However, high-brightness muon beams have not yet been produced. The main challenge for muon acceleration and storage stems from the large phase-space volume occupied by the beam, derived from the muon production mechanism through the decay of pions from pro… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.05669v2-abstract-full').style.display = 'inline'; document.getElementById('2310.05669v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.05669v2-abstract-full" style="display: none;"> Accelerated muon beams have been considered for next-generation studies of high-energy lepton-antilepton collisions and neutrino oscillations. However, high-brightness muon beams have not yet been produced. The main challenge for muon acceleration and storage stems from the large phase-space volume occupied by the beam, derived from the muon production mechanism through the decay of pions from proton collisions. Ionization cooling is the technique proposed to decrease the muon beam phase-space volume. Here we demonstrate a clear signal of ionization cooling through the observation of transverse emittance reduction in beams that traverse lithium hydride or liquid hydrogen absorbers in the Muon Ionization Cooling Experiment (MICE). The measurement is well reproduced by the simulation of the experiment and the theoretical model. The results shown here represent a substantial advance towards the realization of muon-based facilities that could operate at the energy and intensity frontiers. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.05669v2-abstract-full').style.display = 'none'; document.getElementById('2310.05669v2-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> 13 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">23 pages and 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> STFC-P-2023-004 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2209.10251">arXiv:2209.10251</a> <span> [<a href="https://arxiv.org/pdf/2209.10251">pdf</a>, <a href="https://arxiv.org/format/2209.10251">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/10.1103/PhysRevD.106.092003">10.1103/PhysRevD.106.092003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Multiple Coulomb Scattering of muons in Lithium Hydride </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Bogomilov%2C+M">M. Bogomilov</a>, <a href="/search/physics?searchtype=author&query=Tsenov%2C+R">R. Tsenov</a>, <a href="/search/physics?searchtype=author&query=Vankova-Kirilova%2C+G">G. Vankova-Kirilova</a>, <a href="/search/physics?searchtype=author&query=Song%2C+Y+P">Y. P. Song</a>, <a href="/search/physics?searchtype=author&query=Tang%2C+J+Y">J. Y. Tang</a>, <a href="/search/physics?searchtype=author&query=Li%2C+Z+H">Z. H. Li</a>, <a href="/search/physics?searchtype=author&query=Bertoni%2C+R">R. Bertoni</a>, <a href="/search/physics?searchtype=author&query=Bonesini%2C+M">M. Bonesini</a>, <a href="/search/physics?searchtype=author&query=Chignoli%2C+F">F. Chignoli</a>, <a href="/search/physics?searchtype=author&query=Mazza%2C+R">R. Mazza</a>, <a href="/search/physics?searchtype=author&query=Palladino%2C+V">V. Palladino</a>, <a href="/search/physics?searchtype=author&query=de+Bari%2C+A">A. de Bari</a>, <a href="/search/physics?searchtype=author&query=Orestano%2C+D">D. Orestano</a>, <a href="/search/physics?searchtype=author&query=Tortora%2C+L">L. Tortora</a>, <a href="/search/physics?searchtype=author&query=Kuno%2C+Y">Y. Kuno</a>, <a href="/search/physics?searchtype=author&query=Sakamoto%2C+H">H. Sakamoto</a>, <a href="/search/physics?searchtype=author&query=Sato%2C+A">A. Sato</a>, <a href="/search/physics?searchtype=author&query=Ishimoto%2C+S">S. Ishimoto</a>, <a href="/search/physics?searchtype=author&query=Chung%2C+M">M. Chung</a>, <a href="/search/physics?searchtype=author&query=Sung%2C+C+K">C. K. Sung</a>, <a href="/search/physics?searchtype=author&query=Filthaut%2C+F">F. Filthaut</a>, <a href="/search/physics?searchtype=author&query=Fedorov%2C+M">M. Fedorov</a>, <a href="/search/physics?searchtype=author&query=Jokovic%2C+D">D. Jokovic</a>, <a href="/search/physics?searchtype=author&query=Maletic%2C+D">D. Maletic</a>, <a href="/search/physics?searchtype=author&query=Savic%2C+M">M. Savic</a> , et al. (112 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="2209.10251v1-abstract-short" style="display: inline;"> Multiple Coulomb Scattering (MCS) is a well known phenomenon occurring when charged particles traverse materials. Measurements of muons traversing low $Z$ materials made in the MuScat experiment showed that theoretical models and simulation codes, such as GEANT4 (v7.0), over-estimated the scattering. The Muon Ionization Cooling Experiment (MICE) measured the cooling of a muon beam traversing a liq… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.10251v1-abstract-full').style.display = 'inline'; document.getElementById('2209.10251v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2209.10251v1-abstract-full" style="display: none;"> Multiple Coulomb Scattering (MCS) is a well known phenomenon occurring when charged particles traverse materials. Measurements of muons traversing low $Z$ materials made in the MuScat experiment showed that theoretical models and simulation codes, such as GEANT4 (v7.0), over-estimated the scattering. The Muon Ionization Cooling Experiment (MICE) measured the cooling of a muon beam traversing a liquid hydrogen or lithium hydride (LiH) energy absorber as part of a programme to develop muon accelerator facilities, such as a Neutrino Factory or a Muon Collider. The energy loss and MCS that occur in the absorber material are competing effects that alter the performance of the cooling channel. Therefore measurements of MCS are required in order to validate the simulations used to predict the cooling performance in future accelerator facilities. We report measurements made in the MICE apparatus of MCS using a LiH absorber and muons within the momentum range 160 to 245 MeV/c. The measured RMS scattering width is about 9% smaller than that predicted by the approximate formula proposed by the Particle Data Group. Data at 172, 200 and 240 MeV/c are compared to the GEANT4 (v9.6) default scattering model. These measurements show agreement with this more recent GEANT4 (v9.6) version over the range of incident muon momenta. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.10251v1-abstract-full').style.display = 'none'; document.getElementById('2209.10251v1-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> 21 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">20 pages, 14 figures, journal</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> RAL-P-2022-001 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2106.05813">arXiv:2106.05813</a> <span> [<a href="https://arxiv.org/pdf/2106.05813">pdf</a>, <a href="https://arxiv.org/format/2106.05813">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/10.1088/1748-0221/16/08/P08046">10.1088/1748-0221/16/08/P08046 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Performance of the MICE diagnostic system </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=The+MICE+collaboration"> The MICE collaboration</a>, <a href="/search/physics?searchtype=author&query=Bogomilov%2C+M">M. Bogomilov</a>, <a href="/search/physics?searchtype=author&query=Tsenov%2C+R">R. Tsenov</a>, <a href="/search/physics?searchtype=author&query=Vankova-Kirilova%2C+G">G. Vankova-Kirilova</a>, <a href="/search/physics?searchtype=author&query=Song%2C+Y+P">Y. P. Song</a>, <a href="/search/physics?searchtype=author&query=Tang%2C+J+Y">J. Y. Tang</a>, <a href="/search/physics?searchtype=author&query=Li%2C+Z+H">Z. H. Li</a>, <a href="/search/physics?searchtype=author&query=Bertoni%2C+R">R. Bertoni</a>, <a href="/search/physics?searchtype=author&query=Bonesini%2C+M">M. Bonesini</a>, <a href="/search/physics?searchtype=author&query=Chignoli%2C+F">F. Chignoli</a>, <a href="/search/physics?searchtype=author&query=Mazza%2C+R">R. Mazza</a>, <a href="/search/physics?searchtype=author&query=Palladino%2C+V">V. Palladino</a>, <a href="/search/physics?searchtype=author&query=de+Bari%2C+A">A. de Bari</a>, <a href="/search/physics?searchtype=author&query=Orestano%2C+D">D. Orestano</a>, <a href="/search/physics?searchtype=author&query=Tortora%2C+L">L. Tortora</a>, <a href="/search/physics?searchtype=author&query=Kuno%2C+Y">Y. Kuno</a>, <a href="/search/physics?searchtype=author&query=Sakamoto%2C+H">H. Sakamoto</a>, <a href="/search/physics?searchtype=author&query=Sato%2C+A">A. Sato</a>, <a href="/search/physics?searchtype=author&query=Ishimoto%2C+S">S. Ishimoto</a>, <a href="/search/physics?searchtype=author&query=Chung%2C+M">M. Chung</a>, <a href="/search/physics?searchtype=author&query=Sung%2C+C+K">C. K. Sung</a>, <a href="/search/physics?searchtype=author&query=Filthaut%2C+F">F. Filthaut</a>, <a href="/search/physics?searchtype=author&query=Fedorov%2C+M">M. Fedorov</a>, <a href="/search/physics?searchtype=author&query=Jokovic%2C+D">D. Jokovic</a>, <a href="/search/physics?searchtype=author&query=Maletic%2C+D">D. Maletic</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="2106.05813v2-abstract-short" style="display: inline;"> Muon beams of low emittance provide the basis for the intense, well-characterised neutrino beams of a neutrino factory and for multi-TeV lepton-antilepton collisions at a muon collider. The international Muon Ionization Cooling Experiment (MICE) has demonstrated the principle of ionization cooling, the technique by which it is proposed to reduce the phase-space volume occupied by the muon beam at… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.05813v2-abstract-full').style.display = 'inline'; document.getElementById('2106.05813v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2106.05813v2-abstract-full" style="display: none;"> Muon beams of low emittance provide the basis for the intense, well-characterised neutrino beams of a neutrino factory and for multi-TeV lepton-antilepton collisions at a muon collider. The international Muon Ionization Cooling Experiment (MICE) has demonstrated the principle of ionization cooling, the technique by which it is proposed to reduce the phase-space volume occupied by the muon beam at such facilities. This paper documents the performance of the detectors used in MICE to measure the muon-beam parameters, and the physical properties of the liquid hydrogen energy absorber during running. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.05813v2-abstract-full').style.display = 'none'; document.getElementById('2106.05813v2-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 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 June, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 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">27 pages, 18 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> RAL-P-2021-001 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> 2021 JINST 16 P08046 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2101.10623">arXiv:2101.10623</a> <span> [<a href="https://arxiv.org/pdf/2101.10623">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 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/10.1088/1748-0221/16/03/P03035">10.1088/1748-0221/16/03/P03035 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Optimization of Design Parameters for SPPC Longitudinal Dynamics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Zhang%2C+L+H">L. H. Zhang</a>, <a href="/search/physics?searchtype=author&query=Tang%2C+J+Y">J. Y. Tang</a>, <a href="/search/physics?searchtype=author&query=Hong%2C+Y">Y. Hong</a>, <a href="/search/physics?searchtype=author&query=Chen%2C+Y+K">Y. K. Chen</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+L+J">L. J. Wang</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="2101.10623v2-abstract-short" style="display: inline;"> As the second stage of the CEPC-SPPC project, SPPC (Super Proton-Proton Collider) aims at exploring new physics beyond the Standard Model. The key design goal for the SPPC accelerator complex is to reach 75 TeV in center of mass energy with a circumference of 100 km for the collider and an injector chain of four accelerators in cascade to support the collider. As an important part of the SPPC conc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.10623v2-abstract-full').style.display = 'inline'; document.getElementById('2101.10623v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2101.10623v2-abstract-full" style="display: none;"> As the second stage of the CEPC-SPPC project, SPPC (Super Proton-Proton Collider) aims at exploring new physics beyond the Standard Model. The key design goal for the SPPC accelerator complex is to reach 75 TeV in center of mass energy with a circumference of 100 km for the collider and an injector chain of four accelerators in cascade to support the collider. As an important part of the SPPC conceptual study, the longitudinal beam dynamics was studied systematically, which includes the dynamics in the collider and its complex injector chain. First, the bunch filling scheme of the SPPC complex was designed on the basis of various constraints such as the technical challenges of the kicker magnets, limited extraction energy per injection and so on. Next, the study on the longitudinal dynamics in the collider focused on the RF scheme to meet the requirements for luminosity and mitigate relevant instabilities. A higher harmonic RF system (800 MHz) together with the basic RF system (400 MHz) to form a dual-harmonic RF system was employed to mitigate collective instabilities and increase the luminosity by producing shorter bunches. In addition, the longitudinal matchings between the bunches in the different accelerator stages were studied, with special attention to the space charge effects and the beam loading effect in the two lower energy rings (p-RCS and MSS), which result in an optimization of the RF schemes. A set of self-consistent beam and RF parameters for the SPPC complex was obtained. The collider and the three proton synchrotrons of the injector chain have unprecedented features, thus this study demonstrates how a future proton-proton collider complex looks like. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.10623v2-abstract-full').style.display = 'none'; document.getElementById('2101.10623v2-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 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 January, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">24 pages, 13 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/1907.08562">arXiv:1907.08562</a> <span> [<a href="https://arxiv.org/pdf/1907.08562">pdf</a>, <a href="https://arxiv.org/format/1907.08562">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> <p class="title is-5 mathjax"> First demonstration of ionization cooling by the Muon Ionization Cooling Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Bogomilov%2C+M">M. Bogomilov</a>, <a href="/search/physics?searchtype=author&query=Tsenov%2C+R">R. Tsenov</a>, <a href="/search/physics?searchtype=author&query=Vankova-Kirilova%2C+G">G. Vankova-Kirilova</a>, <a href="/search/physics?searchtype=author&query=Song%2C+Y+P">Y. P. Song</a>, <a href="/search/physics?searchtype=author&query=Tang%2C+J+Y">J. Y. Tang</a>, <a href="/search/physics?searchtype=author&query=Li%2C+Z+H">Z. H. Li</a>, <a href="/search/physics?searchtype=author&query=Bertoni%2C+R">R. Bertoni</a>, <a href="/search/physics?searchtype=author&query=Bonesini%2C+M">M. Bonesini</a>, <a href="/search/physics?searchtype=author&query=Chignoli%2C+F">F. Chignoli</a>, <a href="/search/physics?searchtype=author&query=Mazza%2C+R">R. Mazza</a>, <a href="/search/physics?searchtype=author&query=Palladino%2C+V">V. Palladino</a>, <a href="/search/physics?searchtype=author&query=de+Bari%2C+A">A. de Bari</a>, <a href="/search/physics?searchtype=author&query=Orestano%2C+D">D. Orestano</a>, <a href="/search/physics?searchtype=author&query=Tortora%2C+L">L. Tortora</a>, <a href="/search/physics?searchtype=author&query=Kuno%2C+Y">Y. Kuno</a>, <a href="/search/physics?searchtype=author&query=Sakamoto%2C+H">H. Sakamoto</a>, <a href="/search/physics?searchtype=author&query=Sato%2C+A">A. Sato</a>, <a href="/search/physics?searchtype=author&query=Ishimoto%2C+S">S. Ishimoto</a>, <a href="/search/physics?searchtype=author&query=Chung%2C+M">M. Chung</a>, <a href="/search/physics?searchtype=author&query=Sung%2C+C+K">C. K. Sung</a>, <a href="/search/physics?searchtype=author&query=Filthaut%2C+F">F. Filthaut</a>, <a href="/search/physics?searchtype=author&query=Jokovic%2C+D">D. Jokovic</a>, <a href="/search/physics?searchtype=author&query=Maletic%2C+D">D. Maletic</a>, <a href="/search/physics?searchtype=author&query=Savic%2C+M">M. Savic</a>, <a href="/search/physics?searchtype=author&query=Jovancevic%2C+N">N. Jovancevic</a> , et al. (110 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="1907.08562v1-abstract-short" style="display: inline;"> High-brightness muon beams of energy comparable to those produced by state-of-the-art electron, proton and ion accelerators have yet to be realised. Such beams have the potential to carry the search for new phenomena in lepton-antilepton collisions to extremely high energy and also to provide uniquely well-characterised neutrino beams. A muon beam may be created through the decay of pions produced… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.08562v1-abstract-full').style.display = 'inline'; document.getElementById('1907.08562v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1907.08562v1-abstract-full" style="display: none;"> High-brightness muon beams of energy comparable to those produced by state-of-the-art electron, proton and ion accelerators have yet to be realised. Such beams have the potential to carry the search for new phenomena in lepton-antilepton collisions to extremely high energy and also to provide uniquely well-characterised neutrino beams. A muon beam may be created through the decay of pions produced in the interaction of a proton beam with a target. To produce a high-brightness beam from such a source requires that the phase space volume occupied by the muons be reduced (cooled). Ionization cooling is the novel technique by which it is proposed to cool the beam. The Muon Ionization Cooling Experiment collaboration has constructed a section of an ionization cooling cell and used it to provide the first demonstration of ionization cooling. We present these ground-breaking measurements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.08562v1-abstract-full').style.display = 'none'; document.getElementById('1907.08562v1-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> 19 July, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2019. </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">19 pages and 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> RAL-P-2019-003 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1811.08189">arXiv:1811.08189</a> <span> [<a href="https://arxiv.org/pdf/1811.08189">pdf</a>, <a href="https://arxiv.org/format/1811.08189">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> </div> </div> <p class="title is-5 mathjax"> Spectra Analysis to Stretching of ADB Structure Metamaterial </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Sun%2C+Q">Q. Sun</a>, <a href="/search/physics?searchtype=author&query=Tang%2C+J+Y">J. Y. Tang</a>, <a href="/search/physics?searchtype=author&query=Lin%2C+J+N">J. N. Lin</a>, <a href="/search/physics?searchtype=author&query=He%2C+M+G">M. G. He</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+Z+P">Z. P. Wang</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="1811.08189v2-abstract-short" style="display: inline;"> Asymmetric-double-bars (ADB) structure is one of the most interesting plasmonic metamaterials that has been broadly investigated. Here we propose to manufacture ADB on top of elastic material, to get direct control to the dimension of ADB elements. To analyze the spectra numerically, simulation by commercial software (COMSOL) are carried out. We successfully modify the characteristic spectra and e… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1811.08189v2-abstract-full').style.display = 'inline'; document.getElementById('1811.08189v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1811.08189v2-abstract-full" style="display: none;"> Asymmetric-double-bars (ADB) structure is one of the most interesting plasmonic metamaterials that has been broadly investigated. Here we propose to manufacture ADB on top of elastic material, to get direct control to the dimension of ADB elements. To analyze the spectra numerically, simulation by commercial software (COMSOL) are carried out. We successfully modify the characteristic spectra and enhance Q-factor of the peak near infrared by introducing angular and amplitude parameters of the stretching of substrate in the simulation. At the mean time, we significantly restrain red shift in the absorption spectra by applying flipped-configuration and substrate etching configuration to ADB structure. Intriguing quadratic functions between stretching ratio and the absorption peak wavelength are obtained when stretching in x and y direction. For other directions, EIT lineshape appears in transmission spectra. These results might contribute to future application of plasmonic metamaterial in laser controlling and sensors. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1811.08189v2-abstract-full').style.display = 'none'; document.getElementById('1811.08189v2-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> 3 December, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 November, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2018. </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 figs and 5 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">MSC Class:</span> 82D80 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1806.09250">arXiv:1806.09250</a> <span> [<a href="https://arxiv.org/pdf/1806.09250">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="Signal Processing">eess.SP</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/TNS.2019.2900480">10.1109/TNS.2019.2900480 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Electronics of Time-of-flight Measurement for Back-n at CSNS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Yu%2C+T">T. Yu</a>, <a href="/search/physics?searchtype=author&query=Cao%2C+P">P. Cao</a>, <a href="/search/physics?searchtype=author&query=Ji%2C+X+Y">X. Y. Ji</a>, <a href="/search/physics?searchtype=author&query=Xie%2C+L+K">L. K. Xie</a>, <a href="/search/physics?searchtype=author&query=Huang%2C+X+R">X. R. Huang</a>, <a href="/search/physics?searchtype=author&query=An%2C+Q">Q. An</a>, <a href="/search/physics?searchtype=author&query=Bai%2C+H+Y">H. Y. Bai</a>, <a href="/search/physics?searchtype=author&query=Bao%2C+J">J. Bao</a>, <a href="/search/physics?searchtype=author&query=Chen%2C+Y+H">Y. H. Chen</a>, <a href="/search/physics?searchtype=author&query=Cheng%2C+P+J">P. J. Cheng</a>, <a href="/search/physics?searchtype=author&query=Cui%2C+Z+Q">Z. Q. Cui</a>, <a href="/search/physics?searchtype=author&query=Fan%2C+R+R">R. R. Fan</a>, <a href="/search/physics?searchtype=author&query=Feng%2C+C+Q">C. Q. Feng</a>, <a href="/search/physics?searchtype=author&query=Gu%2C+M+H">M. H. Gu</a>, <a href="/search/physics?searchtype=author&query=Han%2C+Z+J">Z. J. Han</a>, <a href="/search/physics?searchtype=author&query=He%2C+G+Z">G. Z. He</a>, <a href="/search/physics?searchtype=author&query=He%2C+Y+C">Y. C. He</a>, <a href="/search/physics?searchtype=author&query=He%2C+Y+F">Y. F. He</a>, <a href="/search/physics?searchtype=author&query=Huang%2C+H+X">H. X. Huang</a>, <a href="/search/physics?searchtype=author&query=Huang%2C+W+L">W. L. Huang</a>, <a href="/search/physics?searchtype=author&query=Ji%2C+X+L">X. L. Ji</a>, <a href="/search/physics?searchtype=author&query=Jiang%2C+H+Y">H. Y. Jiang</a>, <a href="/search/physics?searchtype=author&query=Jiang%2C+W">W. Jiang</a>, <a href="/search/physics?searchtype=author&query=Jing%2C+H+Y">H. Y. Jing</a>, <a href="/search/physics?searchtype=author&query=Kang%2C+L">L. Kang</a> , et al. (46 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="1806.09250v1-abstract-short" style="display: inline;"> Back-n is a white neutron experimental facility at China Spallation Neutron Source (CSNS). The time structure of the primary proton beam make it fully applicable to use TOF (time-of-flight) method for neutron energy measuring. We implement the electronics of TOF measurement on the general-purpose readout electronics designed for all of the seven detectors in Back-n. The electronics is based on PXI… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.09250v1-abstract-full').style.display = 'inline'; document.getElementById('1806.09250v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1806.09250v1-abstract-full" style="display: none;"> Back-n is a white neutron experimental facility at China Spallation Neutron Source (CSNS). The time structure of the primary proton beam make it fully applicable to use TOF (time-of-flight) method for neutron energy measuring. We implement the electronics of TOF measurement on the general-purpose readout electronics designed for all of the seven detectors in Back-n. The electronics is based on PXIe (Peripheral Component Interconnect Express eXtensions for Instrumentation) platform, which is composed of FDM (Field Digitizer Modules), TCM (Trigger and Clock Module), and SCM (Signal Conditioning Module). T0 signal synchronous to the CSNS accelerator represents the neutron emission from the target. It is the start of time stamp. The trigger and clock module (TCM) receives, synchronizes and distributes the T0 signal to each FDM based on the PXIe backplane bus. Meantime, detector signals after being conditioned are fed into FDMs for waveform digitizing. First sample point of the signal is the stop of time stamp. According to the start, stop time stamp and the time of signal over threshold, the total TOF can be obtained. FPGA-based (Field Programmable Gate Array) TDC is implemented on TCM to accurately acquire the time interval between the asynchronous T0 signal and the global synchronous clock phase. There is also an FPGA-based TDC on FDM to accurately acquire the time interval between T0 arriving at FDM and the first sample point of the detector signal, the over threshold time of signal is obtained offline. This method for TOF measurement is efficient and not needed for additional modules. Test result shows the accuracy of TOF is sub-nanosecond and can meet the requirement for Back-n at CSNS. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.09250v1-abstract-full').style.display = 'none'; document.getElementById('1806.09250v1-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> 24 June, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2018. </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, 13 figures, 21st IEEE Real Time Conference</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1806.09249">arXiv:1806.09249</a> <span> [<a href="https://arxiv.org/pdf/1806.09249">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="Signal Processing">eess.SP</span> </div> </div> <p class="title is-5 mathjax"> T0 Fan-out for Back-n White Neutron Facility at CSNS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ji%2C+X+Y">X. Y. Ji</a>, <a href="/search/physics?searchtype=author&query=Cao%2C+P">P. Cao</a>, <a href="/search/physics?searchtype=author&query=Yu%2C+T">T. Yu</a>, <a href="/search/physics?searchtype=author&query=Xie%2C+L+K">L. K. Xie</a>, <a href="/search/physics?searchtype=author&query=Huang%2C+X+R">X. R. Huang</a>, <a href="/search/physics?searchtype=author&query=An%2C+Q">Q. An</a>, <a href="/search/physics?searchtype=author&query=Bai%2C+H+Y">H. Y. Bai</a>, <a href="/search/physics?searchtype=author&query=Bao%2C+J">J. Bao</a>, <a href="/search/physics?searchtype=author&query=Chen%2C+Y+H">Y. H. Chen</a>, <a href="/search/physics?searchtype=author&query=Cheng%2C+P+J">P. J. Cheng</a>, <a href="/search/physics?searchtype=author&query=Cui%2C+Z+Q">Z. Q. Cui</a>, <a href="/search/physics?searchtype=author&query=Fan%2C+R+R">R. R. Fan</a>, <a href="/search/physics?searchtype=author&query=Feng%2C+C+Q">C. Q. Feng</a>, <a href="/search/physics?searchtype=author&query=Gu%2C+M+H">M. H. Gu</a>, <a href="/search/physics?searchtype=author&query=Han%2C+Z+J">Z. J. Han</a>, <a href="/search/physics?searchtype=author&query=He%2C+G+Z">G. Z. He</a>, <a href="/search/physics?searchtype=author&query=He%2C+Y+C">Y. C. He</a>, <a href="/search/physics?searchtype=author&query=He%2C+Y+F">Y. F. He</a>, <a href="/search/physics?searchtype=author&query=Huang%2C+H+X">H. X. Huang</a>, <a href="/search/physics?searchtype=author&query=Huang%2C+W+L">W. L. Huang</a>, <a href="/search/physics?searchtype=author&query=Ji%2C+X+L">X. L. Ji</a>, <a href="/search/physics?searchtype=author&query=Jiang%2C+H+Y">H. Y. Jiang</a>, <a href="/search/physics?searchtype=author&query=Jiang%2C+W">W. Jiang</a>, <a href="/search/physics?searchtype=author&query=Jing%2C+H+Y">H. Y. Jing</a>, <a href="/search/physics?searchtype=author&query=Kang%2C+L">L. Kang</a> , et al. (46 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="1806.09249v1-abstract-short" style="display: inline;"> the main physics goal for Back-n white neutron facility at China Spallation Neutron Source (CSNS) is to measure nuclear data. The energy of neutrons is one of the most important parameters for measuring nuclear data. Method of time of flight (TOF) is used to obtain the energy of neutrons. The time when proton bunches hit the thick tungsten target is considered as the start point of TOF. T0 signal,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.09249v1-abstract-full').style.display = 'inline'; document.getElementById('1806.09249v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1806.09249v1-abstract-full" style="display: none;"> the main physics goal for Back-n white neutron facility at China Spallation Neutron Source (CSNS) is to measure nuclear data. The energy of neutrons is one of the most important parameters for measuring nuclear data. Method of time of flight (TOF) is used to obtain the energy of neutrons. The time when proton bunches hit the thick tungsten target is considered as the start point of TOF. T0 signal, generated from the CSNS accelerator, represents this start time. Besides, the T0 signal is also used as the gate control signal that triggers the readout electronics. Obviously, the timing precision of T0 directly affects the measurement precision of TOF and controls the running or readout electronics. In this paper, the T0 fan-out for Back-n white neutron facility at CSNS is proposed. The T0 signal travelling from the CSNS accelerator is fanned out to the two underground experiment stations respectively over long cables. To guarantee the timing precision, T0 signal is conditioned with good signal edge. Furthermore, techniques of signal pre-emphasizing and equalizing are used to improve signal quality after T0 being transmitted over long cables with about 100 m length. Experiments show that the T0 fan-out works well, the T0 signal transmitted over 100 m remains a good time resolution with a standard deviation of 25 ps. It absolutely meets the required accuracy of the measurement of TOF. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.09249v1-abstract-full').style.display = 'none'; document.getElementById('1806.09249v1-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> 24 June, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2018. </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">3 pages, 6 figures, the 21st IEEE Real Time Conference</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1707.00292">arXiv:1707.00292</a> <span> [<a href="https://arxiv.org/pdf/1707.00292">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> </div> </div> <p class="title is-5 mathjax"> Design of back-streaming white neutron beam line at CSNS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Zhang%2C+L+Y">L. Y. Zhang</a>, <a href="/search/physics?searchtype=author&query=Jing%2C+H+T">H. T. Jing</a>, <a href="/search/physics?searchtype=author&query=Tang%2C+J+Y">J. Y. Tang</a>, <a href="/search/physics?searchtype=author&query=Li%2C+Q">Q. Li</a>, <a href="/search/physics?searchtype=author&query=Ruan%2C+X+C">X. C. Ruan</a>, <a href="/search/physics?searchtype=author&query=Ren%2C+J">J. Ren</a>, <a href="/search/physics?searchtype=author&query=Ning%2C+C+J">C. J. Ning</a>, <a href="/search/physics?searchtype=author&query=Yu%2C+Y+J">Y. J. Yu</a>, <a href="/search/physics?searchtype=author&query=Tan%2C+Z+X">Z. X. Tan</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+P+C">P. C. Wang</a>, <a href="/search/physics?searchtype=author&query=He%2C+Y+C">Y. C. He</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+X+Q">X. Q. Wang</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="1707.00292v2-abstract-short" style="display: inline;"> A white neutron beam line using the back-streaming neutrons from the spallation target at China Spallation Neutron Source (CSNS) is under construction. Different spectrometers mainly for nuclear data measurements to be installed in the so-called Back-n beam line are also under development in phases. The physics design of the beam line includes the overview of the characteristics of the neutron bea… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1707.00292v2-abstract-full').style.display = 'inline'; document.getElementById('1707.00292v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1707.00292v2-abstract-full" style="display: none;"> A white neutron beam line using the back-streaming neutrons from the spallation target at China Spallation Neutron Source (CSNS) is under construction. Different spectrometers mainly for nuclear data measurements to be installed in the so-called Back-n beam line are also under development in phases. The physics design of the beam line includes the overview of the characteristics of the neutron beam including energy spectrum, flux and time structure, and the optimizations of neutron beam spots and in-hall background with the help of a complicated collimation system and a sophisticated neutron dump. The wide neutron energy range of 1 eV~100 MeV is very good to support different applications, especially for nuclear data measurements. At Endstation#2 where is about 80 m from the target, the main properties include neutron flux of 106 n/cm2/s, time resolution of a few per mille over almost the whole energy range, in-hall background about 0.01 /cm2/s for both neutron and gamma. With its completion in late 2017, Back-n will be not only the first high-performance white neutron source in China, but also among the best white neutron sources in the world. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1707.00292v2-abstract-full').style.display = 'none'; document.getElementById('1707.00292v2-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> 13 November, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 July, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">19 pages, 14 figures, 16 references</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1404.4687">arXiv:1404.4687</a> <span> [<a href="https://arxiv.org/pdf/1404.4687">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"> Linear Fringe Field Effects of Quadrupoles </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Zhou%2C+D">D. Zhou</a>, <a href="/search/physics?searchtype=author&query=Tang%2C+J+Y">J. Y. Tang</a>, <a href="/search/physics?searchtype=author&query=Chen%2C+Y">Y. Chen</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+N">N. Wang</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="1404.4687v1-abstract-short" style="display: inline;"> Fringe field becomes important when one requires more accurate modeling of a ring lattice to study the long-term beam dynamics in storage rings and deal with large aperture magnets in high-intensity proton synchrotrons or accumulator rings. In this paper, a simple expression to calculate the tune shifts due to quadrupole fringe fields is derived by using Lie algebra technique. With higher-order te… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.4687v1-abstract-full').style.display = 'inline'; document.getElementById('1404.4687v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1404.4687v1-abstract-full" style="display: none;"> Fringe field becomes important when one requires more accurate modeling of a ring lattice to study the long-term beam dynamics in storage rings and deal with large aperture magnets in high-intensity proton synchrotrons or accumulator rings. In this paper, a simple expression to calculate the tune shifts due to quadrupole fringe fields is derived by using Lie algebra technique. With higher-order terms included, this method is more accurate compared with the linear fringe field model used in SAD code. The method is also applied to a BEPCII lattice. Also based on the Lie algebra technique and an inverse series technique, an equivalent hard-edge model for quadrupoles is proposed, in which the model parameters are derived analytically. The model has the advantages of the direct calculation of the equivalent length and strength of a quadrupole and the easy adaptation when the strength changes. The validity of the model and its simplified version has been checked with a numerical method, and they show very good agreements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.4687v1-abstract-full').style.display = 'none'; document.getElementById('1404.4687v1-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 April, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2014. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1309.7022">arXiv:1309.7022</a> <span> [<a href="https://arxiv.org/pdf/1309.7022">pdf</a>, <a href="https://arxiv.org/format/1309.7022">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div 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.nuclphysb.2014.05.016">10.1016/j.nuclphysb.2014.05.016 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A Very Intense Neutrino Super Beam Experiment for Leptonic CP Violation Discovery based on the European Spallation Source Linac: A Snowmass 2013 White Paper </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Baussan%2C+E">E. Baussan</a>, <a href="/search/physics?searchtype=author&query=Blennow%2C+M">M. Blennow</a>, <a href="/search/physics?searchtype=author&query=Bogomilov%2C+M">M. Bogomilov</a>, <a href="/search/physics?searchtype=author&query=Bouquerel%2C+E">E. Bouquerel</a>, <a href="/search/physics?searchtype=author&query=Cederkall%2C+J">J. Cederkall</a>, <a href="/search/physics?searchtype=author&query=Christiansen%2C+P">P. Christiansen</a>, <a href="/search/physics?searchtype=author&query=Coloma%2C+P">P. Coloma</a>, <a href="/search/physics?searchtype=author&query=Cupial%2C+P">P. Cupial</a>, <a href="/search/physics?searchtype=author&query=Danared%2C+H">H. Danared</a>, <a href="/search/physics?searchtype=author&query=Densham%2C+C">C. Densham</a>, <a href="/search/physics?searchtype=author&query=Dracos%2C+M">M. Dracos</a>, <a href="/search/physics?searchtype=author&query=Ekelof%2C+T">T. Ekelof</a>, <a href="/search/physics?searchtype=author&query=Eshraqi%2C+M">M. Eshraqi</a>, <a href="/search/physics?searchtype=author&query=Martinez%2C+E+F">E. Fernandez Martinez</a>, <a href="/search/physics?searchtype=author&query=Gaudiot%2C+G">G. Gaudiot</a>, <a href="/search/physics?searchtype=author&query=Hall-Wilton%2C+R">R. Hall-Wilton</a>, <a href="/search/physics?searchtype=author&query=Koutchouk%2C+J+-">J. -P. Koutchouk</a>, <a href="/search/physics?searchtype=author&query=Lindroos%2C+M">M. Lindroos</a>, <a href="/search/physics?searchtype=author&query=Matev%2C+R">R. Matev</a>, <a href="/search/physics?searchtype=author&query=McGinnis%2C+D">D. McGinnis</a>, <a href="/search/physics?searchtype=author&query=Mezzetto%2C+M">M. Mezzetto</a>, <a href="/search/physics?searchtype=author&query=Miyamoto%2C+R">R. Miyamoto</a>, <a href="/search/physics?searchtype=author&query=Mosca%2C+L">L. Mosca</a>, <a href="/search/physics?searchtype=author&query=Ohlsson%2C+T">T. Ohlsson</a>, <a href="/search/physics?searchtype=author&query=Ohman%2C+H">H. Ohman</a> , et al. (10 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="1309.7022v3-abstract-short" style="display: inline;"> Very intense neutrino beams and large neutrino detectors will be needed in order to enable the discovery of CP violation in the leptonic sector. We propose to use the proton linac of the European Spallation Source currently under construction in Lund, Sweden to deliver, in parallel with the spallation neutron production, a very intense, cost effective and high performance neutrino beam. The baseli… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1309.7022v3-abstract-full').style.display = 'inline'; document.getElementById('1309.7022v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1309.7022v3-abstract-full" style="display: none;"> Very intense neutrino beams and large neutrino detectors will be needed in order to enable the discovery of CP violation in the leptonic sector. We propose to use the proton linac of the European Spallation Source currently under construction in Lund, Sweden to deliver, in parallel with the spallation neutron production, a very intense, cost effective and high performance neutrino beam. The baseline program for the European Spallation Source linac is that it will be fully operational at 5 MW average power by 2022, producing 2 GeV 2.86 ms long proton pulses at a rate of 14 Hz. Our proposal is to upgrade the linac to 10 MW average power and 28 Hz, producing 14 pulses/s for neutron production and 14 pulses/s for neutrino production. Furthermore, because of the high current required in the pulsed neutrino horn, the length of the pulses used for neutrino production needs to be compressed to a few $渭$s with the aid of an accumulator ring. A long baseline experiment using this Super Beam and a megaton underground Water Cherenkov detector located in existing mines 300-600 km from Lund will make it possible to discover leptonic CP violation at 5 $蟽$ significance level in up to 50% of the leptonic Dirac CP-violating phase range. This experiment could also determine the neutrino mass hierarchy at a significance level of more than 3 $蟽$ if this issue will not already have been settled by other experiments by then. The mass hierarchy performance could be increased by combining the neutrino beam results with those obtained from atmospheric neutrinos detected by the same large volume detector. This detector will also be used to measure the proton lifetime, detect cosmological neutrinos and neutrinos from supernova explosions. Results on the sensitivity to leptonic CP violation and the neutrino mass hierarchy are presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1309.7022v3-abstract-full').style.display = 'none'; document.getElementById('1309.7022v3-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 November, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 September, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">28 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nuclear Physics B, Volume 885, August 2014, Pages 127-149 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1012.5460">arXiv:1012.5460</a> <span> [<a href="https://arxiv.org/pdf/1012.5460">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 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/10.3788/HPLPB20112310.2773">10.3788/HPLPB20112310.2773 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Scattering effect in proton beam windows at spallation targets </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Meng%2C+C">C. Meng</a>, <a href="/search/physics?searchtype=author&query=Tang%2C+J+Y">J. Y. Tang</a>, <a href="/search/physics?searchtype=author&query=Jing%2C+H+T">H. T. Jing</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="1012.5460v2-abstract-short" style="display: inline;"> Proton beam window (PBW) is a boundary wall between a high vacuum area in the proton beam line and the helium atmosphere in a helium vessel at a high beam power target. The thermal and mechanical problems of the PBW have been studied in other spallation neutron sources; however, the scattering effect in PBW is seldom reported in literature but it may pose serious problems for the target design if… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1012.5460v2-abstract-full').style.display = 'inline'; document.getElementById('1012.5460v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1012.5460v2-abstract-full" style="display: none;"> Proton beam window (PBW) is a boundary wall between a high vacuum area in the proton beam line and the helium atmosphere in a helium vessel at a high beam power target. The thermal and mechanical problems of the PBW have been studied in other spallation neutron sources; however, the scattering effect in PBW is seldom reported in literature but it may pose serious problems for the target design if not well treated. This paper will report the simulation studies of the scattering effect in PBW. Different materials and different structures of PBW are discussed. Taking CSNS as an example, a thin single-layer aluminum alloy PBW with edge cooling has been chosen for CSNS-I and CSNS-II, and a sandwiched aluminum alloy PBW has been chosen for CSNS-III. Simulations results of the scattering effect in the presence of beam uniformization at target by using non-linear magnets at the different CSNS PBWs are presented. The simulations show that the scattering effect at PBW is very important in the beam loss and the beam distribution at the target. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1012.5460v2-abstract-full').style.display = 'none'; document.getElementById('1012.5460v2-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 September, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 25 December, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 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">8 pages, 6 figures, 6 tables. Appears in High Power Laser and Particle Beams 2011</span> </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact arXiv</title><desc>Click here to contact arXiv</desc><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg> <a href="https://info.arxiv.org/help/contact.html"> Contact</a> </li> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>subscribe to arXiv mailings</title><desc>Click here to subscribe</desc><path d="M476 3.2L12.5 270.6c-18.1 10.4-15.8 35.6 2.2 43.2L121 358.4l287.3-253.2c5.5-4.9 13.3 2.6 8.6 8.3L176 407v80.5c0 23.6 28.5 32.9 42.5 15.8L282 426l124.6 52.2c14.2 6 30.4-2.9 33-18.2l72-432C515 7.8 493.3-6.8 476 3.2z"/></svg> <a href="https://info.arxiv.org/help/subscribe"> Subscribe</a> </li> </ul> </div> </div> </div>   <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/license/index.html">Copyright</a></li> <li><a href="https://info.arxiv.org/help/policies/privacy_policy.html">Privacy Policy</a></li> </ul> </div> <div class="column sorry-app-links"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/web_accessibility.html">Web Accessibility Assistance</a></li> <li> <p class="help"> <a class="a11y-main-link" href="https://status.arxiv.org" target="_blank">arXiv Operational Status <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 512" class="icon filter-dark_grey" role="presentation"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z"/></svg></a><br> Get status notifications via <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/email/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg>email</a> or <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/slack/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512" class="icon filter-black" role="presentation"><path d="M94.12 315.1c0 25.9-21.16 47.06-47.06 47.06S0 341 0 315.1c0-25.9 21.16-47.06 47.06-47.06h47.06v47.06zm23.72 0c0-25.9 21.16-47.06 47.06-47.06s47.06 21.16 47.06 47.06v117.84c0 25.9-21.16 47.06-47.06 47.06s-47.06-21.16-47.06-47.06V315.1zm47.06-188.98c-25.9 0-47.06-21.16-47.06-47.06S139 32 164.9 32s47.06 21.16 47.06 47.06v47.06H164.9zm0 23.72c25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06H47.06C21.16 243.96 0 222.8 0 196.9s21.16-47.06 47.06-47.06H164.9zm188.98 47.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06h-47.06V196.9zm-23.72 0c0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06V79.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06V196.9zM283.1 385.88c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06v-47.06h47.06zm0-23.72c-25.9 0-47.06-21.16-47.06-47.06 0-25.9 21.16-47.06 47.06-47.06h117.84c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06H283.1z"/></svg>slack</a> </p> </li> </ul> </div> </div> </div>  </div> </footer> <script src="https://static.arxiv.org/static/base/1.0.0a5/js/member_acknowledgement.js"></script> </body> </html>

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