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

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Design calculations and measurements of a dipole magnet with Permendur pole pieces 偶极磁体的设计计算与测量
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.73173
R. Early, J. Cobb, J. E. Oijala
{"title":"Design calculations and measurements of a dipole magnet with Permendur pole pieces","authors":"R. Early, J. Cobb, J. E. Oijala","doi":"10.1109/PAC.1989.73173","DOIUrl":"https://doi.org/10.1109/PAC.1989.73173","url":null,"abstract":"A redesign of the SLC (Stanford Linear Collider) south linac-to-ring beam line required that the width of a good field of three of the bending magnets be increased while utilizing the same yokes and coils. Further requirements were that the resulting magnets should have the same strength at two different operating currents as the original magnets. The idea of replacing the steel poles with pole pieces of the high permeability material Permendur was investigated. Design calculations were done using TOSCA and POISSON. An existing prototype magnet was modified with Permendur poles, and magnetic measurements were done. The new magnets were completed, and measurements agreed well with the calculations. The final magnets were within 0.1% of their required strength at 1.21 GeV and had good field regions of +or-32 mm in x at 1.153 GeV and +or-30 mm at 1.21 GeV.<<ETX>>","PeriodicalId":225182,"journal":{"name":"Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology","volume":"46 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":"122817931","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: 9
BBU in microtrons with subharmonic injection 亚谐波注入微管中的BBU
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.73390
S. Penner
{"title":"BBU in microtrons with subharmonic injection","authors":"S. Penner","doi":"10.1109/PAC.1989.73390","DOIUrl":"https://doi.org/10.1109/PAC.1989.73390","url":null,"abstract":"It is pointed out that the current in recirculating electron accelerators is limited by the recirculating regenerative type of beam breakup (BBU). Existing calculations of the BBU threshold current, I/sub s/, average over the relative phase between the beam bunch and the RF mode causing the blowup. This averaging is invalid if the BBU frequency is an integral or half-integral multiple of the beam frequency, in which case I/sub s/ may be substantially reduced. This effect is not important when the beam frequency equals the accelerating mode frequency, f/sub 0/, because the RF structure can be designed to avoid the harmonic condition. When the beam frequency is a large submultiple of f/sub 0/, this may not be possible. Calculations for the NIST RTM, which will inject at the 36/sup th/ subharmonic of f/sub 0/, are presented. The calculations include the effects of the reversed first return orbit and the variable return-path focusing of the RTM.<<ETX>>","PeriodicalId":225182,"journal":{"name":"Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology","volume":"9 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":"122890107","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
High intensity H/sup -/ cyclotrons for radioisotope production 用于放射性同位素生产的高强度H/sup /回旋加速器
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.73243
J. Bol, A. Chevalier, E. Conard, Y. Jongen, M. Ladeuze, G. Lannoye, T. Ledocte, M. Lacroix, A. Ninane, G. Rijckewaert, S. Zaremba
{"title":"High intensity H/sup -/ cyclotrons for radioisotope production","authors":"J. Bol, A. Chevalier, E. Conard, Y. Jongen, M. Ladeuze, G. Lannoye, T. Ledocte, M. Lacroix, A. Ninane, G. Rijckewaert, S. Zaremba","doi":"10.1109/PAC.1989.73243","DOIUrl":"https://doi.org/10.1109/PAC.1989.73243","url":null,"abstract":"A description is given of Cyclone 30, a 30-MeV, H/sup -/ cyclotron for radioscope production, designed for extremely high extracted beam intensity (500 mu A) and low power consumption (less than 100 kW with a 15-kW extracted beam). The Cyclone 30 prototype has now been operational for years at Louvain-La-Neuve and has achieved all design goals while demonstrating very high reliability. The major events in its development are reviewed. The data gathered so far give general basic trends for future designs; a 70-MeV, 2-mA machine design study is presented.<<ETX>>","PeriodicalId":225182,"journal":{"name":"Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology","volume":"35 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":"114151163","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
Beam impedance of ferrite kicker magnets 铁氧体启动磁铁的波束阻抗
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.73278
F. Voelker, G. Lambertson
{"title":"Beam impedance of ferrite kicker magnets","authors":"F. Voelker, G. Lambertson","doi":"10.1109/PAC.1989.73278","DOIUrl":"https://doi.org/10.1109/PAC.1989.73278","url":null,"abstract":"The longitudinal beam impedance of a typical pulsed magnet that will be used in the Advanced Light Source was measured. The magnets are of a ferrite window-frame design with a single plate conductor on each side. Two separate power supplies are used to derive current in opposite directions in the two conductors. The continuity of the ferrite yoke is interrupted by two copper plates 1 mm thick in the center of the top and bottom of the window frame. This increases the reluctance of the magnetic path, and thus decreases the flux which couples the beam. The measurements were made by exciting a 1/8-in. rod along the beam path through the magnet. This makes a 185- Omega transmission line, and it was terminated in a resistive divider at the exist end. A 3-GHz network and analyzer was used to measure S/sub 21/ through the magnet, and longitudinal beam impedance was calculated from these data. The impedance is dominated by two low-frequency resonances in the magnet winding and drive circuit.<<ETX>>","PeriodicalId":225182,"journal":{"name":"Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology","volume":"150 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":"121989733","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
The University of Maryland electron pulse compression experiment 马里兰大学的电子脉冲压缩实验
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.73350
T. Shea, E. Boggasch, Y. Chen, Matthias Reiser
{"title":"The University of Maryland electron pulse compression experiment","authors":"T. Shea, E. Boggasch, Y. Chen, Matthias Reiser","doi":"10.1109/PAC.1989.73350","DOIUrl":"https://doi.org/10.1109/PAC.1989.73350","url":null,"abstract":"The Maryland Electron Beam Transport Experiment has been devoted to the study of high perveance beam dynamics in the transverse dimensions. In this experiment, a 5-keV, 240-mA electron beam with a 2- mu s pulse length is injected into a 5-cm channel of periodically spaced solenoids. A newly designed periodically spaced solenoids. A newly designed injector will extend the study to include the beam physics (emittance growth, etc.) of an electron pulse undergoing longitudinal compression. Consisting of a variable-perveance gridded electron gun followed by one induction module, this injector will produce a 50-ns, 40-mA electron pulse with a 5-keV, quadratically time-dependent energy shear. Preliminary computations suggest that a beam with these initial conditions will compress by about a factor of five before reaching the end of the channel. First results from tests of the major system components are presented along with a description of planned experiments.<<ETX>>","PeriodicalId":225182,"journal":{"name":"Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology","volume":"216 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":"129611591","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: 3
IUCF Cooler ring status 1989 1989年IUCF冷却器环状态
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.73025
R. Pollock
{"title":"IUCF Cooler ring status 1989","authors":"R. Pollock","doi":"10.1109/PAC.1989.73025","DOIUrl":"https://doi.org/10.1109/PAC.1989.73025","url":null,"abstract":"The IUCF (Indiana University Cyclotron Facility) Cooler is a synchrotron-storage ring with electron cooling. The construction was funded in 1983, with beam tests beginning in 1987. After a year to commissioning, the ring is beginning to provide beams for research users. The author reviews some of the recent accomplishments and summarizes some of the operating characteristics as presently understood. The IUCF Cooler is in transition to operational status with first experiments underway and an appreciable fraction of its large parameter space explored. There have been signs of good resolution, small emittance, good reproducibility, and easy energy variability.<<ETX>>","PeriodicalId":225182,"journal":{"name":"Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology","volume":"82 5 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":"129958908","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
A simple estimate of bunch rotation 束旋转的一个简单估计
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.73353
Y. Kamiya
{"title":"A simple estimate of bunch rotation","authors":"Y. Kamiya","doi":"10.1109/PAC.1989.73353","DOIUrl":"https://doi.org/10.1109/PAC.1989.73353","url":null,"abstract":"The method of bunch rotation will be used for the 1-GeV Compressor/Stretcher Ring of the JHP (Japanese Hadron Project) in order to compress a long proton bunch of 200 ns up to a few tens of nanoseconds. In the present work, analytical formulas are presented for estimating the bunch rotation under a longitudinal space charge effect. To obtain the formulas, a simple model in which the space charge force is assumed to be linear is used. An elementary derivation of the envelope equation including a self-force is given. Using the equation, the formulas are obtained, and numerical examples are presented.<<ETX>>","PeriodicalId":225182,"journal":{"name":"Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology","volume":"1 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":"128780553","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
An asymmetric B-meson factory at PEP PEP的不对称b介子工厂
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.72944
A. Garren, S. Chattopadhyay, Y. Chin, P. Oddone, M. Zisman, M. Donald, G. Feldman, J. Paterson, J. Rees
{"title":"An asymmetric B-meson factory at PEP","authors":"A. Garren, S. Chattopadhyay, Y. Chin, P. Oddone, M. Zisman, M. Donald, G. Feldman, J. Paterson, J. Rees","doi":"10.1109/PAC.1989.72944","DOIUrl":"https://doi.org/10.1109/PAC.1989.72944","url":null,"abstract":"A preliminary design for a B-factory has been made using asymmetric collisions between positrons in the Positron-Electron Project (PEP) storage ring and electrons in a new, low-energy ring. The design utilizes small-aperture, permanent-magnet quadrupoles close to the interaction point (IP). Optimization of optical and beam parameters at the IP is discussed, as well as the lattice design of the interaction region and of the rings. The preliminary design for a 12 GeV*2 GeV B-factory, called Apiary I, gives the rather modest luminosity of 0.5*10/sup 33/ cm/sup -2/ s/sup -1/. A major limitation was the power that can be absorbed by the PEP vacuum chamber. It is suggested that, by going to a more symmetrical system such as 9 GeV*3 GeV, it may be possible to go to a luminosity that is almost a factor of four higher.<<ETX>>","PeriodicalId":225182,"journal":{"name":"Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology","volume":"31 11 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":"128565907","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: 14
Status of superconducting RF cavity development 超导射频腔的发展现状
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.72918
K. Shepard
{"title":"Status of superconducting RF cavity development","authors":"K. Shepard","doi":"10.1109/PAC.1989.72918","DOIUrl":"https://doi.org/10.1109/PAC.1989.72918","url":null,"abstract":"The scope of accelerator applications of RF superconducting devices is briefly discussed from a historical perspective. Current high-velocity and low-velocity acceleration projects and development activity are outlined. Projects at CEBAF, CERN, DESY, KEK, Argonne, Stony Brook, JAERI, and Kansas State are considered. The development of high-T(i)c(ei) oxide RF superconductors is also discussed.<<ETX>>","PeriodicalId":225182,"journal":{"name":"Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology","volume":"238 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":"128645554","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
Operational experience with using collimators to remove halo in the Tevatron collider 在Tevatron对撞机中使用准直器去除光晕的操作经验
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI: 10.1109/PAC.1989.73069
S. Pruss, C. Crawford, D. Finley, M. Harrison
{"title":"Operational experience with using collimators to remove halo in the Tevatron collider","authors":"S. Pruss, C. Crawford, D. Finley, M. Harrison","doi":"10.1109/PAC.1989.73069","DOIUrl":"https://doi.org/10.1109/PAC.1989.73069","url":null,"abstract":"It is pointed out that in the case of the Tevatron collider the signal will be proportional to the luminosity. One form of noise comes from large emittance particles interacting on the beam pipe walls near the experiment. Scraping these particles with a collimator may reduce the signal a little bit but can reduce the noise greatly. The key is striking a balance and scraping enough to reduce background without losing much luminosity. Operational experience with the Tevatron collider shows how this can be done. Scrapers have also been used to produce very small emittance beam ( approximately 5 pi ) for E710, an experiment measuring very-small-angle elastic scattering and the total cross section.<<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":"129254712","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
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