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Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology最新文献

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Report on the international workshop on next generation linear colliders 新一代线性对撞机国际研讨会报告
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.73232
R. Ruth
{"title":"Report on the international workshop on next generation linear colliders","authors":"R. Ruth","doi":"10.1109/PAC.1989.73232","DOIUrl":"https://doi.org/10.1109/PAC.1989.73232","url":null,"abstract":"The main goals of the Linear Collider (LC) Workshop were to discuss research programs of the various laboratories around the world, to identify common areas of interest in the various next-generation LC designs, and to advance these programs by collaboration. The following issues are reviewed here: damping rings and sources, beam dynamics and wakefields, RF power sources, RF structures, instrumentation, and final focus. The outlook in this field is briefly discussed.<<ETX>>","PeriodicalId":225182,"journal":{"name":"Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114999982","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: 1
The beam bunching and transport system of the Argonne positive ion injector Argonne正离子注入器的束束和输运系统
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.73108
P. Den Hartog, J. Bogaty, L. Bollinger, B. Clifft, R. Pardo, K. Shepard
{"title":"The beam bunching and transport system of the Argonne positive ion injector","authors":"P. Den Hartog, J. Bogaty, L. Bollinger, B. Clifft, R. Pardo, K. Shepard","doi":"10.1109/PAC.1989.73108","DOIUrl":"https://doi.org/10.1109/PAC.1989.73108","url":null,"abstract":"A new positive ion injector (PII) is under construction at Argonne. It will replace the existing 9 MV tandem electrostatic accelerator as an injector into ATLAS (Argonne Tandem-Linac Accelerator System). It consists of an electron-cyclotron-resonance (ECR) ion source on a 350 kV platform injecting into a superconducting linac optimized for very slow ( beta <or=0.007 c) ions. This combination can potentially produce even higher-quality heavy-ion beams than are available from the tandem since the emittance growth within the linac is largely determined by the quality of the bunching and beam transport. The system implemented uses a two-stage bunching system, composed of a fourth-harmonic gridded buncher on the ECR high-voltage platform and a room-temperature spiral-loaded buncher. A sinusoidal beam chopper is designed to provide mass resolution of m/ Delta m>400, and a doubly isochronous beamline is used to minimize time spread due to path length differences.<<ETX>>","PeriodicalId":225182,"journal":{"name":"Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115369721","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
Momentum slits, collimators and masks in the SLC SLC中的动量狭缝、准直器和掩模
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.73111
D. Walz, A. McFarlane, E. Lewandowski, J. Zabdyr
{"title":"Momentum slits, collimators and masks in the SLC","authors":"D. Walz, A. McFarlane, E. Lewandowski, J. Zabdyr","doi":"10.1109/PAC.1989.73111","DOIUrl":"https://doi.org/10.1109/PAC.1989.73111","url":null,"abstract":"The high specific power densities in the SLC (Stanford Linear Collider) give rise to problems in collimation and momentum analysis, beam containment, machine protection, and background control. The results of an extensive program to develop most of the devices deemed necessary for operation of the arc matching sections and the final focus region are presented. Emphasis is placed on materials selection and on unique features of remotely adjustable slits and halo clipper collimators which have to operate with great precision in a high-radiation, ultra-high-vacuum environment. Also covered are solutions for a few fixed-aperture machine protection collimators.<<ETX>>","PeriodicalId":225182,"journal":{"name":"Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115371234","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: 7
4 rod RFQ injectors for the GSI linac 4杆RFQ喷射器用于GSI直线器
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.73364
A. Schempp
{"title":"4 rod RFQ injectors for the GSI linac","authors":"A. Schempp","doi":"10.1109/PAC.1989.73364","DOIUrl":"https://doi.org/10.1109/PAC.1989.73364","url":null,"abstract":"A four-rod RFQ (radio-frequency quadrupole) is being built as a part of the new high charge state injector for the UNILAC at GSI Darmstadt. It will accelerate heavy ions from an ECR (electron cyclotron resonance) ion source with charge-to-mass ratio of q/u>or=0.117 (U/sup 28+/) from 2.5 keV/u to 300 keV/u, which corresponds to an energy gain of 2.5 MeV/q. The four-rod RFQ will be 2.9 m long with a tank diameter of 35 cm and will operate at 108.5 MHz with a duty cycle of up to 50%. The status of the project and first results are presented. In addition, work on a high-current prototype accelerator designed for U/sup 2+/ (25 emA), 2.5 to 25 keV/u, and an operating frequency of 27 MHz is reported.<<ETX>>","PeriodicalId":225182,"journal":{"name":"Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115386401","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
Status of ELETTRA eletra的状态
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.73080
A. Wrulich
{"title":"Status of ELETTRA","authors":"A. Wrulich","doi":"10.1109/PAC.1989.73080","DOIUrl":"https://doi.org/10.1109/PAC.1989.73080","url":null,"abstract":"ELETTRA is conceived as an insertion device dominated facility with a large number of straight sections for wigglers and undulators, with high flux of radiation from wigglers, and high brilliance from undulators in the photon energy range from 10 eV to 1-2 keV. These design goals will be achieved by a low-emittance storage ring with beam energies between 1.5 and 2 GeV. The status of the lattice, the radiation sources, the storage ring magnets, the vacuum, the injection system, the instrumentation, and the control system are reviewed.<<ETX>>","PeriodicalId":225182,"journal":{"name":"Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123110581","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
Prediction of long-term beam stability using high order toroidal invariants 利用高阶环面不变量预测光束的长期稳定性
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.73442
J. Irwin, Y.T. Yan
{"title":"Prediction of long-term beam stability using high order toroidal invariants","authors":"J. Irwin, Y.T. Yan","doi":"10.1109/PAC.1989.73442","DOIUrl":"https://doi.org/10.1109/PAC.1989.73442","url":null,"abstract":"It is noted that two ways have been proposed for detecting signs of long-term beam instability. They both rest on the belief that if a particle is long-term unstable, it will experience a significant and discernible amount of chaotic motion. This chaotic motion can be detected by (a) looking for small departure from regular motion such as slow change of an action invariant or (b) tracking two neighboring particle and looking for an exponential growth of their phase space separation. The authors describe efforts of type (a) and present some recent comparisons with procedures of type (b). Results are presented for the Superconducting Super Collider.<<ETX>>","PeriodicalId":225182,"journal":{"name":"Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121804617","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
Stochastic cooling and storage tests with oxygen ions in LEAR LEAR中氧离子的随机冷却和贮存试验
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.73209
S. Baird, J. Bosser, M. Chanel, C. Hill, D. Kramer, R. Ley, D. Manglunki, D. Mohl, P. Têtu, G. Tranquille
{"title":"Stochastic cooling and storage tests with oxygen ions in LEAR","authors":"S. Baird, J. Bosser, M. Chanel, C. Hill, D. Kramer, R. Ley, D. Manglunki, D. Mohl, P. Têtu, G. Tranquille","doi":"10.1109/PAC.1989.73209","DOIUrl":"https://doi.org/10.1109/PAC.1989.73209","url":null,"abstract":"O/sup 8+/ and O/sup 6+/ ions were stored in the CERN Low-Energy Antiproton Ring (LEAR) during a machine experiment session. The aim was to obtain some hints on the lifetime of heavy ion beams in a good cooling ring vacuum and to test cooling and stacking of ions. Stochastic cooling was used to compensate the beam decay due to multiple scattering on the residual gas, which is the most important effect on lifetime. An equilibrium momentum spread of less than 5*10/sup -4/ was measured, thus proving the efficiency of stochastic cooling for multiply charged ions. With the vacuum conditions of LEAR (2.6*10/sup -12/ torr gauge reading with a residual gas of 90% H/sub 2/), measured beam lifetimes are 25 min for O/sup 6+/ at 7.2 MeV/u and 600 min for O/sup 8+/ at 11.5 MeV/u. These numbers set favorable limits for low-energy ion storage rings.<<ETX>>","PeriodicalId":225182,"journal":{"name":"Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117198001","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
Small-signal gain and numerical simulation of transvertron high power microwave sources 高功率微波源的小信号增益与数值模拟
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.72996
Donald J. Sullivan, '. JohnE.Walsh, M. Arman, Brendan B. Godfrey
{"title":"Small-signal gain and numerical simulation of transvertron high power microwave sources","authors":"Donald J. Sullivan, '. JohnE.Walsh, M. Arman, Brendan B. Godfrey","doi":"10.1109/PAC.1989.72996","DOIUrl":"https://doi.org/10.1109/PAC.1989.72996","url":null,"abstract":"The transvertron oscillator or amplifier is a novel and efficient type of intense relativistic electron-beam-driven microwave radiation source. In the m=0 asymmetric version, it consists of single or multiple cylindrical cavities driven at one of the TM/sub 0np/ resonances by a high-voltage low-impedance electron beam. There is no applied magnetic field, and the oscillatory transverse motion acquired by the axially injected electron beam is an essential part of the drive mechanism. The transvertron theory was systematically tested for a wide range of parameters. The simulations were designed to verify the theoretical predictions, assess the transvertron as a possible source of intense microwave radiation, and study its potential as a microwave amplifier. Numerical results agree well in all regards with the analytical theory. Simulations were carried out in two dimensions using CCUBE with the exception of radial loading cases, where the 3-D code SOS was required.<<ETX>>","PeriodicalId":225182,"journal":{"name":"Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology","volume":"153 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121254729","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
Long-term test of a LEP prototype superconducting cavity in the CERN SPS 欧洲核子研究中心SPS中LEP原型超导腔的长期试验
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.72923
D. Boussard, G. Cavallari, H. P. Kindermann, G. Passardi, R. Stierlin, J. Tuckmantel, W. Weingarten
{"title":"Long-term test of a LEP prototype superconducting cavity in the CERN SPS","authors":"D. Boussard, G. Cavallari, H. P. Kindermann, G. Passardi, R. Stierlin, J. Tuckmantel, W. Weingarten","doi":"10.1109/PAC.1989.72923","DOIUrl":"https://doi.org/10.1109/PAC.1989.72923","url":null,"abstract":"Using a superconducting LEP (Large Electron Positron Collider) prototype cavity, an e/sup +/ beam was accelerated at E/sub a/=5.5 MV/m. The SPS (Super Proton Synchrotron) proton accelerator/proton-antiproton collider/LEP injector was chosen for the implementation of the cavity. After 8000 h at 4.5 K E/sub a//sup max/ remained unchanged (7.1 MV/m); the Q-value (5 MV/m) was 2/3*10/sup 9/. No major system failure occurred. RF feedback guaranteed very low fluctuations of the cavity field amplitude and phase.<<ETX>>","PeriodicalId":225182,"journal":{"name":"Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127467209","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
The backward mode in an electromagnetically pumped free electron lasers 电磁抽运自由电子激光器的反向模式
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.73398
C.Y. Kong, W. Zhou
{"title":"The backward mode in an electromagnetically pumped free electron lasers","authors":"C.Y. Kong, W. Zhou","doi":"10.1109/PAC.1989.73398","DOIUrl":"https://doi.org/10.1109/PAC.1989.73398","url":null,"abstract":"A detailed analysis of the backward mode of an electromagnetic standing wave wiggler for FELs (free-electron lasers) is conducted. The analysis results in a clear understanding of the backward mode. It is indicated that the mode, for its absolute instability, should be suppressed in experiments for forward mode radiation to avoid beam disruption. On the other hand, it can be used as a self-excited high-power source with high efficiency in the low-frequency region and can saturate on a much higher level than the conventional forward mode.<<ETX>>","PeriodicalId":225182,"journal":{"name":"Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124942696","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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