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What is Needed for BiSCO to Work in a Dipole Insert for 20 Tesla Hybrid Accelerator Magnets BiSCO 在 20 特斯拉混合加速器磁铁偶极子插件中发挥作用的必要条件
arXiv - PHYS - Accelerator Physics Pub Date : 2024-06-21 DOI: arxiv-2406.15278
E. BarziFermi National Accelerator LaboratoryOhio State University
{"title":"What is Needed for BiSCO to Work in a Dipole Insert for 20 Tesla Hybrid Accelerator Magnets","authors":"E. BarziFermi National Accelerator LaboratoryOhio State University","doi":"arxiv-2406.15278","DOIUrl":"https://doi.org/arxiv-2406.15278","url":null,"abstract":"A major focus of the global HEP community is on high field superconducting\u0000magnets made of High Temperature Superconductors (HTS) for future Energy\u0000Frontier Programs. Within the U.S. Magnet Development Program (US MDP), a key\u0000task is that of developing HTS inserts producing fields larger than 5 T within\u000015 T outserts made of Nb$_3$Sn to generate 20 T+ for future accelerators.\u0000Bi$_2$Sr$_2$CaCu$_2$O$_8$$_-$$_x$ (BiSCO) is the only high T c superconductor\u0000available as an isotropic round multifilamentary wire, which is ideal for\u0000producing the flat cables (i.e., Rutherford type cables) that are used in\u0000accelerator magnets. Significant progress in the development and\u0000industrialization of BiSCO wires has been made over the last decade. However,\u0000several challenges remain for this HTS to be used successfully in hybrid\u0000magnets. The following is required to improve performance, lower costs and\u0000simplify the processing of BiSCO accelerator magnets: (1) The development and\u0000design, in collaboration with industry, of BiSCO wires that are adequate for\u0000Rutherford cabling; (2) The development of insulation processes and materials\u0000that prevent leaks when heat treated in highly corrosive oxygen; (3) Control of\u0000stresses and strains; and (4) Integration of high pressure heat treatment with\u0000a new approach that will lower costs and simplify processing.","PeriodicalId":501318,"journal":{"name":"arXiv - PHYS - Accelerator Physics","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141526850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fermilab Booster Beam Emittances from Quadrupole Modes Measured by BPMs 用 BPM 测量的费米实验室助推器四极模式光束幅射
arXiv - PHYS - Accelerator Physics Pub Date : 2024-06-21 DOI: arxiv-2406.15238
C. Y. TanFermi National Accelerator Laboratory, M. BalcewiczFermi National Accelerator Laboratory
{"title":"Fermilab Booster Beam Emittances from Quadrupole Modes Measured by BPMs","authors":"C. Y. TanFermi National Accelerator Laboratory, M. BalcewiczFermi National Accelerator Laboratory","doi":"arxiv-2406.15238","DOIUrl":"https://doi.org/arxiv-2406.15238","url":null,"abstract":"The measurement of beam emittances by extracting the quadrupole mode signal\u0000from a 4 plate beam position monitor (BPM) was published at least 40 years ago.\u0000Unfortunately, in practice, this method suffers from poor signal to noise ratio\u0000and requires a lot of tuning to extract out the emittances. In this paper, an\u0000improved method where multiple BPMs are used together with better mathematical\u0000analysis is described. The BPM derived emittances are then compared with those\u0000measured by the Ion Profile Monitor (IPM). Surprisingly, the BPM measured\u0000emittances behave very well and are more realistic than those measured by the\u0000IPM.","PeriodicalId":501318,"journal":{"name":"arXiv - PHYS - Accelerator Physics","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141526851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Observation of a Synchro-betatron Instability in Fermilab Booster 费米实验室助推器中的同步-重子不稳定性观测
arXiv - PHYS - Accelerator Physics Pub Date : 2024-06-20 DOI: arxiv-2406.14672
M. BalcewiczFermi National Accelerator Laboratory, J. EldredFermi National Accelerator Laboratory
{"title":"Observation of a Synchro-betatron Instability in Fermilab Booster","authors":"M. BalcewiczFermi National Accelerator Laboratory, J. EldredFermi National Accelerator Laboratory","doi":"arxiv-2406.14672","DOIUrl":"https://doi.org/arxiv-2406.14672","url":null,"abstract":"In preparation for PIP-II, there has been interest in running the Fermilab\u0000Booster at a higher current more indicative of the PIP-II era operation. In\u0000July 2023, an experiment was performed to study collective instabilities over\u0000the transition crossing at the Fermilab Booster. Over the transition crossing,\u0000the synchrotron tune becomes small and synchro-betatron instabilities become\u0000possible. During the experiment, an intensity threshold was observed, above\u0000which a dipole instability with losses concentrated in the tail of the bunch.\u0000These losses are consistent with the Convective Instability.","PeriodicalId":501318,"journal":{"name":"arXiv - PHYS - Accelerator Physics","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141526854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Efficient algorithms for dynamic aperture and momentum acceptance calculation 动态孔径和动量接受计算的高效算法
arXiv - PHYS - Accelerator Physics Pub Date : 2024-06-20 DOI: arxiv-2406.14407
Bernard Riemann, Masamitsu Aiba, Jonas Kallestrup, Andreas Streun
{"title":"Efficient algorithms for dynamic aperture and momentum acceptance calculation","authors":"Bernard Riemann, Masamitsu Aiba, Jonas Kallestrup, Andreas Streun","doi":"arxiv-2406.14407","DOIUrl":"https://doi.org/arxiv-2406.14407","url":null,"abstract":"New algorithms useful for the calculation of dynamic aperture and momentum\u0000acceptance in circular accelerators are developed and presented. The flood-fill\u0000tool from raster graphics inspired us to efficiently compute dynamic apertures\u0000by minimizing required trackings on stable initial coordinates, leading to\u0000several factors of speed-up with respect to standard algorithms. A novel\u0000technique for momentum acceptance calculations, Fast Touschek Tracking, is\u0000developed. Thorough benchmarking using modern accelerator codes shows that the\u0000new technique can provide one or two orders of magnitude faster computation of\u0000local momentum acceptances with only limited loss of accuracy.","PeriodicalId":501318,"journal":{"name":"arXiv - PHYS - Accelerator Physics","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141500558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ionization Profile Monitors for the IOTA Proton Beam 用于 IOTA 质子束的电离轮廓监测器
arXiv - PHYS - Accelerator Physics Pub Date : 2024-06-20 DOI: arxiv-2406.14710
H. PiekarzFermilab, A. RomanovFermilab, R. Thurman-KeupFermilab, V. ShiltsevNorthern Illinois University
{"title":"Ionization Profile Monitors for the IOTA Proton Beam","authors":"H. PiekarzFermilab, A. RomanovFermilab, R. Thurman-KeupFermilab, V. ShiltsevNorthern Illinois University","doi":"arxiv-2406.14710","DOIUrl":"https://doi.org/arxiv-2406.14710","url":null,"abstract":"Ionization profile monitors (IPMs) are widely used in accelerators for\u0000non-destructive and fast diagnostics of high energy particle beams. Two such\u0000monitors - one vertical and one horizontal - are being developed for\u0000installation in the IOTA storage ring at Fermilab. They will be used for\u0000turn-by-turn (microseconds scale) measurements of the 70 MeV/c IOTA proton beam\u0000sizes. In this paper we present the IPMs design (largely following the FNAL\u0000Booster IPMs which employ no external guiding magnetic fields), their\u0000mechanical, vacuum, and electric subsystems and DAQ, and discuss anticipated\u0000effects on the beams circulating in IOTA.","PeriodicalId":501318,"journal":{"name":"arXiv - PHYS - Accelerator Physics","volume":"86 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141526853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of RFSoC-based direct sampling highly multiplexed microwave SQUID readout for future CMB and submillimeter surveys 为未来的 CMB 和亚毫米波测量开发基于 RFSoC 的直接采样高复用微波 SQUID 读取器
arXiv - PHYS - Accelerator Physics Pub Date : 2024-06-19 DOI: arxiv-2406.13156
Chao Liu, Zeeshan Ahmed, Shawn W. Henderson, Ryan Herbst, Larry Ruckman, Thomas Satterthwaite
{"title":"Development of RFSoC-based direct sampling highly multiplexed microwave SQUID readout for future CMB and submillimeter surveys","authors":"Chao Liu, Zeeshan Ahmed, Shawn W. Henderson, Ryan Herbst, Larry Ruckman, Thomas Satterthwaite","doi":"arxiv-2406.13156","DOIUrl":"https://doi.org/arxiv-2406.13156","url":null,"abstract":"The SLAC Microresonator Radio Frequency (SMuRF) electronics is being deployed\u0000as the readout for the Cosmic Microwave Background (CMB) telescopes of the\u0000Simons Observatory (SO). A Radio Frequency System-on-Chip (RFSoC) based readout\u0000of microwave frequency resonator based cryogenic sensors is under development\u0000at SLAC as an upgrade path for SMuRF with simplified RF hardware, a more\u0000compact footprint, and lower total power consumption. The high-speed integrated\u0000data converters and digital data path in RFSoC enable direct RF sampling\u0000without analog up and down conversion for RF frequencies up to 6 GHz. A\u0000comprehensive optimization and characterization study has been performed for\u0000direct RF sampling for microwave SQUID multiplexers, which covers noise level,\u0000RF dynamic range, and linearity using a prototype implementation. The SMuRF\u0000firmware, including the implementation of closed-loop tone tracking, has been\u0000ported to the RFSoC platform and interfaced with the quadrature mixers for\u0000digital up and down conversion in the data converter data path to realize a\u0000full microwave SQUID multiplexer readout. In this paper, a selection of the\u0000performance characterization results of direct RF sampling for microwave SQUID\u0000multiplexer readout will be summarized and compared with science-driven\u0000requirements. Preliminary results demonstrating the read out of cryogenic\u0000sensors using the prototype system will also be presented here. We anticipate\u0000our new RFSoC-based SMuRF system will be an enabling readout for on-going and\u0000future experiments in astronomy and cosmology, which rely on large arrays of\u0000cryogenic sensors to achieve their science goals.","PeriodicalId":501318,"journal":{"name":"arXiv - PHYS - Accelerator Physics","volume":"75 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141526855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Injection Optimization at Particle Accelerators via Reinforcement Learning: From Simulation to Real-World Application 通过强化学习实现粒子加速器的喷射优化：从模拟到实际应用
arXiv - PHYS - Accelerator Physics Pub Date : 2024-06-18 DOI: arxiv-2406.12735
Awal AwalRWTH Aachen UniversityGSI Helmholtzzentrum für Schwerionenforschung GmbH, Jan HetzelGSI Helmholtzzentrum für Schwerionenforschung GmbH, Ralf GebelGSI Helmholtzzentrum für Schwerionenforschung GmbHForschungszentrum Jülich GmbH, Jörg PretzRWTH Aachen UniversityForschungszentrum Jülich GmbH
{"title":"Injection Optimization at Particle Accelerators via Reinforcement Learning: From Simulation to Real-World Application","authors":"Awal AwalRWTH Aachen UniversityGSI Helmholtzzentrum für Schwerionenforschung GmbH, Jan HetzelGSI Helmholtzzentrum für Schwerionenforschung GmbH, Ralf GebelGSI Helmholtzzentrum für Schwerionenforschung GmbHForschungszentrum Jülich GmbH, Jörg PretzRWTH Aachen UniversityForschungszentrum Jülich GmbH","doi":"arxiv-2406.12735","DOIUrl":"https://doi.org/arxiv-2406.12735","url":null,"abstract":"Optimizing the injection process in particle accelerators is crucial for\u0000enhancing beam quality and operational efficiency. This paper presents a\u0000framework for utilizing Reinforcement Learning (RL) to optimize the injection\u0000process at accelerator facilities. By framing the optimization challenge as an\u0000RL problem, we developed an agent capable of dynamically aligning the beam's\u0000transverse space with desired targets. Our methodology leverages the Soft\u0000Actor-Critic algorithm, enhanced with domain randomization and dense neural\u0000networks, to train the agent in simulated environments with varying dynamics\u0000promoting it to learn a generalized robust policy. The agent was evaluated in\u0000live runs at the Cooler Synchrotron COSY and it has successfully optimized the\u0000beam cross-section reaching human operator level but in notably less time. An\u0000empirical study further validated the importance of each architecture component\u0000in achieving a robust and generalized optimization strategy. The results\u0000demonstrate the potential of RL in automating and improving optimization tasks\u0000at particle acceleration facilities.","PeriodicalId":501318,"journal":{"name":"arXiv - PHYS - Accelerator Physics","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141526857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Characterization of Additive Manufacturing Materials for String Assembly in Cleanroom 用于洁净室串联组装的增材制造材料的特性分析
arXiv - PHYS - Accelerator Physics Pub Date : 2024-06-18 DOI: arxiv-2406.12741
Jacopo BernardiniFermilab, Mattia PariseFermilab, Donato PassarelliFermilab
{"title":"Characterization of Additive Manufacturing Materials for String Assembly in Cleanroom","authors":"Jacopo BernardiniFermilab, Mattia PariseFermilab, Donato PassarelliFermilab","doi":"arxiv-2406.12741","DOIUrl":"https://doi.org/arxiv-2406.12741","url":null,"abstract":"Beamline components, such as superconducting radio frequency cavities and\u0000focusing lenses, need to be assembled together in a string while in a cleanroom\u0000environment. The present contribution identifies and characterizes materials\u0000for additive manufacturing that can be used in a cleanroom. The well known\u0000advantages of additive manufacturing processes would highly benefit the design\u0000and development of tooling needed for the mechanical support and alignment of\u0000string components. Cleanliness, mechanical properties, and leak tightness of\u0000the chosen materials are the main focus of this contribution, which also paves\u0000the way for the integration of such materials in cryomodule assemblies. Results\u0000reported here were obtained in the framework of the PIP-II project at Fermilab.","PeriodicalId":501318,"journal":{"name":"arXiv - PHYS - Accelerator Physics","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141532099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A wireless method to obtain the longitudinal beam impedance from scattering parameters 从散射参数获取纵向光束阻抗的无线方法
arXiv - PHYS - Accelerator Physics Pub Date : 2024-06-14 DOI: arxiv-2406.10105
Antuono Chiara, Zannini Carlo, Mostacci Andrea, Migliorati Mauro
{"title":"A wireless method to obtain the longitudinal beam impedance from scattering parameters","authors":"Antuono Chiara, Zannini Carlo, Mostacci Andrea, Migliorati Mauro","doi":"arxiv-2406.10105","DOIUrl":"https://doi.org/arxiv-2406.10105","url":null,"abstract":"The coaxial wire method is a common and appreciated technique to assess the\u0000beam coupling impedance of an accelerator element from scattering parameters.\u0000Nevertheless, the results obtained from wire measurements could be inaccurate\u0000due to the presence of the stretched conductive wire that artificially creates\u0000the conditions for the propagation of a Transverse ElectroMagnetic (TEM) mode.\u0000The aim of this work is to establish a solid technique to obtain the beam\u0000coupling impedance from electromagnetic simulations, without modifications of\u0000the device under test. In this framework, we identified a new relation to get\u0000the longitudinal resistive wall beam coupling impedance of a circular chamber\u0000directly from the scattering parameters and demonstrated that it reduces to the\u0000exact theoretical expression. Furthermore, a possible generalization of the\u0000method to arbitrary cross-section chamber geometries has been studied and\u0000validated with numerical simulations.","PeriodicalId":501318,"journal":{"name":"arXiv - PHYS - Accelerator Physics","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141529895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of selected mild steels for application in vacuum systems of future gravitational wave detectors 研究未来引力波探测器真空系统中应用的部分低碳钢
arXiv - PHYS - Accelerator Physics Pub Date : 2024-06-11 DOI: arxiv-2406.07123
Carlo Scarcia, Giuseppe Bregliozzi, Paolo Chiggiato, Alice Ingrid Michet, Ana Teresa Perez Fontenla, Martino Rimoldi, Mauro Taborelli, Ivo Wevers
{"title":"Study of selected mild steels for application in vacuum systems of future gravitational wave detectors","authors":"Carlo Scarcia, Giuseppe Bregliozzi, Paolo Chiggiato, Alice Ingrid Michet, Ana Teresa Perez Fontenla, Martino Rimoldi, Mauro Taborelli, Ivo Wevers","doi":"arxiv-2406.07123","DOIUrl":"https://doi.org/arxiv-2406.07123","url":null,"abstract":"Next-generation gravitational wave detectors (GWDs) like the Cosmic Explorer\u0000and Einstein Telescope require extensive vacuum tubing, necessitating\u0000cost-effective materials. This study explores the viability of mild steel as an\u0000alternative to austenitic stainless steel for UHV beampipes, focusing on\u0000outgassing rates and surface chemistry after low-temperature bakeouts. Mild\u0000steels exhibit significantly lower hydrogen outgassing rates, below 10$^{-14}$\u0000mbar l s$^{-1}$ cm$^{-2}$ after bakeouts at 80{deg}C for 48 hours. While water\u0000vapor is the primary residual gas after such low-temperature bakeouts, repeated\u0000treatments reduce its outgassing rate and modify surface conditions so that\u0000such benefit is preserved after at least six months of exposure to laboratory\u0000air. These findings position mild steel as an economical and efficient material\u0000for future GWD beampipes.","PeriodicalId":501318,"journal":{"name":"arXiv - PHYS - Accelerator Physics","volume":"125 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141509160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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