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PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)最新文献

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Coherent synchrotron radiation analysis for the photoinjected energy recovery linac and UVFEL projects at the NSLS NSLS光注入能量回收直线加速器和超空间自由激光器项目的相干同步辐射分析
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-08-16 DOI: 10.1109/PAC.2001.987937
J. Wu, J. Murphy, V. Yakimenko, I. Ben-Zvi, W. Graves, E. Johnson, S. Krinsky, T. Shaftan, L. Yu
{"title":"Coherent synchrotron radiation analysis for the photoinjected energy recovery linac and UVFEL projects at the NSLS","authors":"J. Wu, J. Murphy, V. Yakimenko, I. Ben-Zvi, W. Graves, E. Johnson, S. Krinsky, T. Shaftan, L. Yu","doi":"10.1109/PAC.2001.987937","DOIUrl":"https://doi.org/10.1109/PAC.2001.987937","url":null,"abstract":"Coherent Synchrotron Radiation (CSR) effects in bunch compressors are analyzed. Schemes for reducing the CSR effects are presented.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"163 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122722532","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: 5
Large aperture magnets for a future high power proton synchrotron 未来高能质子同步加速器用大孔径磁体
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-08-14 DOI: 10.1109/PAC.2001.988073
J. Ostiguy, F. Mills
{"title":"Large aperture magnets for a future high power proton synchrotron","authors":"J. Ostiguy, F. Mills","doi":"10.1109/PAC.2001.988073","DOIUrl":"https://doi.org/10.1109/PAC.2001.988073","url":null,"abstract":"A high intensity, high power proton synchrotron is currently under consideration at Fermilab. The machine known as the Proton Driver - would accelerate 3/spl times/10/sup 13/ protons from 400 MeV to 12 GeV (stage I) or 16 GeV (stage II) and ultimately deliver in excess of 1 MW of beam power. To minimize losses and insure beam stability, the space charge-induced tune shift must be kept well below 0.5. This is accomplished by spreading out bunches both longitudinally and transversely. While the former strategy favors high voltage low frequency RF, the latter leads to magnets with unconventionally large apertures. This requirement, combined with a 1.5 T bending field and rapid cycling operation results in a number of serious but not insurmountable challenges. In this paper, we discuss the design of the Proton Driver magnets and the rationale behind it.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131621520","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: 2
Modeling of the primary proton beamline of the Fermilab NuMI project 费米实验室NuMI项目主质子束线的建模
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-08-14 DOI: 10.1109/PAC.2001.986746
S. Striganov, S. Childress, S. Drozhdin, N. Grossman, P. Lucas, N. Nokhov
{"title":"Modeling of the primary proton beamline of the Fermilab NuMI project","authors":"S. Striganov, S. Childress, S. Drozhdin, N. Grossman, P. Lucas, N. Nokhov","doi":"10.1109/PAC.2001.986746","DOIUrl":"https://doi.org/10.1109/PAC.2001.986746","url":null,"abstract":"The 120 GeV primary proton beamline for the NuMI-MINOS experiment at Fermilab will transport one of the most intense high-energy beams ever constructed. In parallel operation with the Collider program, 80% of the intensity capability of the Fermilab Main Injector can be sent to NuMI. Radiation safety pertaining to residual activity, damage of equipment and irradiation of groundwater is a primary concern. A particular challenge is that this beam will be transported to and targeted in a cavern excavated in rock in an aquifer region. A model of the beamline, including transport elements and excavated enclosures, has been built in the radiation simulation program MARS. This model has been used to determine limits for allowable beam loss, and to study effects of instabilities and of various failure types. Some results obtained with this model are presented.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126544141","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
Processing studies of X-band accelerator structures at the NLCTA NLCTA x波段加速器结构的加工研究
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-08-13 DOI: 10.1109/PAC.2001.987546
C. Adolphsen, W. Baumgartner, K. Jobe, F. Pimpec, R. Loewen, Douglas McCormick, M. Ross, Tonee Smith, J. W. Wang, T. Higo
{"title":"Processing studies of X-band accelerator structures at the NLCTA","authors":"C. Adolphsen, W. Baumgartner, K. Jobe, F. Pimpec, R. Loewen, Douglas McCormick, M. Ross, Tonee Smith, J. W. Wang, T. Higo","doi":"10.1109/PAC.2001.987546","DOIUrl":"https://doi.org/10.1109/PAC.2001.987546","url":null,"abstract":"RF processing studies of 1.8-m X-band (11.4 GHz) traveling wave structures at the Next Linear Collider Test Accelerator (NLCTA) have revealed breakdown-related damage at gradients lower than expected from earlier tests with standing wave and shorter, lower group velocity traveling wave structures. To understand this difference, a series of structures with different group velocities and lengths are being processed. In parallel, efforts are being made to improve processing procedures and to reduce structure contaminants and absorbed gases. This paper presents results from these studies.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130959512","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: 29
Quench simulation program for superconducting accelarator magnets 超导加速器磁体的淬火模拟程序
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-08-10 DOI: 10.1109/PAC.2001.988143
S. Kim
{"title":"Quench simulation program for superconducting accelarator magnets","authors":"S. Kim","doi":"10.1109/PAC.2001.988143","DOIUrl":"https://doi.org/10.1109/PAC.2001.988143","url":null,"abstract":"In the design of superconducting rnagnets for accelerator and the quench protection, systems, it is necessary to calculate the current, voltage and temperature during quench. The quench integral value (MIITs) is used to get a rough idea about the quench, but we need numerical calculations to obtain more detailed picture of the quench. A simulation program named \"KUENCH\", which is not based on the MIITs calculation, was developed to calculate voltage, current and temperature of accelerator magnets during quenches. The software and calculation examples are introduced. The example also gives some important information about effects of copper content in the coil and quench protection heaters.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122151456","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: 4
Thermoelastic response of suddenly heated liquid targets in high-power colliders 大功率对撞机中突然加热液体目标的热弹性响应
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-08-08 DOI: 10.1109/PAC.2001.987987
A. Hassanein, I. Konkashbaev, J. Norem
{"title":"Thermoelastic response of suddenly heated liquid targets in high-power colliders","authors":"A. Hassanein, I. Konkashbaev, J. Norem","doi":"10.1109/PAC.2001.987987","DOIUrl":"https://doi.org/10.1109/PAC.2001.987987","url":null,"abstract":"Thermoelastic response of liquid metal targets exposed to high-volumetric-energy deposition in times shorter than the target hydrodynamic response time (i.e., sound travel time) is of interest to several research areas, including targets for high-power accelerators such as the Spallation Neutron Source, muon collider targets, etc. Sudden energy deposition causes shock and rarefaction waves of magnitude /spl plusmn//spl Delta/P that corresponds to an initial thermal pressure of tens of katm. Nevertheless a liquid subjected to a negative pressure is metastable. The problem of liquid target oscillations in the presence of large negative pressure, and the mechanism of fragmentation and its consequences, are considered in this paper.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122175239","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: 6
Quenches and resulting thermal and mechanical effects on epoxy impregnated Nb/sub 3/Sn high field magnets 淬火及其对环氧浸渍Nb/sub /Sn高场磁体的热力学影响
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-08-03 DOI: 10.1109/PAC.2001.988132
R. Yamada, S.W. Kim, A. Lee, R. Wands, J. Rey, M. Wake
{"title":"Quenches and resulting thermal and mechanical effects on epoxy impregnated Nb/sub 3/Sn high field magnets","authors":"R. Yamada, S.W. Kim, A. Lee, R. Wands, J. Rey, M. Wake","doi":"10.1109/PAC.2001.988132","DOIUrl":"https://doi.org/10.1109/PAC.2001.988132","url":null,"abstract":"Thermal deformation and resulting mechanical stress due to quenches inside epoxy-impregnated Nb/sub 3/Sn high field magnets are studied with a combination of a quench simulation program, and the ANSYS program. We use the geometry of the high field cosine theta type dipole magnets with one meter and 10 meter length. The turns where quenches start are heated excessively, up to 100 K to 300 K, depending on the coil length and time delay. The non-quenching turns and surrounding material are not heated substantially. This large temperature gradient causes high local stress in the quenching conductors and their insulation material. The ANSYS program is used to calculate this response.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"231 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132185597","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: 8
Niobium cavity development for the high-energy linac of the Rare Isotope Accelerator 稀有同位素加速器高能直线加速器的铌腔发展
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-08-01 DOI: 10.1109/PAC.2001.986571
C. Compton, T. L. Grimm, W. Hartung, H. Podlech, R. York, G. Ciovati, P. Kneisel, D. Barni, C. Pagani, P. Pierini
{"title":"Niobium cavity development for the high-energy linac of the Rare Isotope Accelerator","authors":"C. Compton, T. L. Grimm, W. Hartung, H. Podlech, R. York, G. Ciovati, P. Kneisel, D. Barni, C. Pagani, P. Pierini","doi":"10.1109/PAC.2001.986571","DOIUrl":"https://doi.org/10.1109/PAC.2001.986571","url":null,"abstract":"This paper will cover the design of a 6-cell /spl beta//sub g/ = 0.47 cavity for the Rare Isotope Accelerator, as well as the fabrication and RF testing of single-cell prototypes. Single-cell prototypes were chosen as a first step, as they provide a quick and inexpensive way to find out whether the desired field level and Q can be reached, and to check for problems with multipacting. An accelerating gradient of 8 MV/m was chosen as a goal for the /spl beta//sub g/ = 0.47 cavity.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130387987","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: 17
Progress in absorber R&D 2: windows 吸收剂研发进展2:窗
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-08-01 DOI: 10.1109/PAC.2001.988287
D. Kaplan, E. Black, K. Cassel, S. Geer, M. Popovic, S. Ishimoto, K. Yoshimura, L. Bandura, M. Cummings, A. Dyshkant, D. Kubik, D. Hedin, C. Darve, Y. Kuno, D. Errede, M. Haney, S. Majewski, M. Reep, D. Summers
{"title":"Progress in absorber R&D 2: windows","authors":"D. Kaplan, E. Black, K. Cassel, S. Geer, M. Popovic, S. Ishimoto, K. Yoshimura, L. Bandura, M. Cummings, A. Dyshkant, D. Kubik, D. Hedin, C. Darve, Y. Kuno, D. Errede, M. Haney, S. Majewski, M. Reep, D. Summers","doi":"10.1109/PAC.2001.988287","DOIUrl":"https://doi.org/10.1109/PAC.2001.988287","url":null,"abstract":"A program is under way to develop liquid-hydrogen energy absorbers for ionization cooling of muon-beam transverse emittance. Minimization of multiple-scattering-induced beam heating requires thin windows. The first window prototype has been destructively tested, validating the finite-element-analysis model and the design approach.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132527516","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: 6
Correction of the long-range beam-beam effect in LHC using electro-magnetic lenses 利用电磁透镜修正大型强子对撞机中的长程光束效应
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-31 DOI: 10.1109/PAC.2001.987147
J. Koutchouk
{"title":"Correction of the long-range beam-beam effect in LHC using electro-magnetic lenses","authors":"J. Koutchouk","doi":"10.1109/PAC.2001.987147","DOIUrl":"https://doi.org/10.1109/PAC.2001.987147","url":null,"abstract":"The beams in LHC collide head-on in at most four experimental points. Due to the small bunch spacing, the beams experience more than one hundred 'near-misses' on either side of the collision points. The transverse beam separation at these places, limited by the quadrupole aperture, is in the range of 7 to 13 /spl sigma/. The non-linear part of these 'long-range' interactions appears to be the dominant mechanism for beam blow-up or beam loss in simulation. A simple non-linear model of the long-range interactions can be devised. It shows that the latter may be locally corrected with good accuracy using wires as correcting lenses. The nonlinearity measured by the tune footprint is reduced by one order of magnitude. Pulsing the correcting lenses cancels the so-called PACMAN effect.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134056269","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: 46
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