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

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Fermilab Recycler diagnostics 费米实验室回收器诊断仪
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-24 DOI: 10.1109/PAC.2001.986681
Fermilab Recycler Diagnostics, Martin Hu
{"title":"Fermilab Recycler diagnostics","authors":"Fermilab Recycler Diagnostics, Martin Hu","doi":"10.1109/PAC.2001.986681","DOIUrl":"https://doi.org/10.1109/PAC.2001.986681","url":null,"abstract":"The Fermilab Recycler Ring is a permanent magnet storage ring for the storage and cooling of antiprotons. The following note describes the diagnostic tools currently available for commissioning, as well as the improvements and upgrades planned for the near future.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133943261","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
Recent experience with inductive insert at PSR 最近有PSR电感式插入的经验
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-24 DOI: 10.1109/PAC.2001.987945
K. Ng, D. Wildman, M. Popovic, A. Browman, D. Fitzgerald, R. Macek, M. Plum, T. Spickermann
{"title":"Recent experience with inductive insert at PSR","authors":"K. Ng, D. Wildman, M. Popovic, A. Browman, D. Fitzgerald, R. Macek, M. Plum, T. Spickermann","doi":"10.1109/PAC.2001.987945","DOIUrl":"https://doi.org/10.1109/PAC.2001.987945","url":null,"abstract":"In a Fermilab-Los Alamos collaboration, inductances constructed of ferrite cores sufficient to cancel a large fraction of the space charge potential-well distortion were installed in the Los Alamos Proton Storage Ring (PSR) as one means of raising the threshold for the two-stream e-p instability. When operating at higher intensities and with sufficient inductance added for full space-charge compensation, an unacceptable longitudinal self-bunching, microwave-like, instability was encountered. Heating the cores to /spl sim/130/spl deg/C proved to be an effective cure, and was found to be a means for tuning the inductance over a limited but useful range. The heated inductors were an essential ingredient in achieving a record accumulation of 9.7 /spl mu/C/pulse. An engineered version of the inductors is now installed for routine operation of the PSR. A summary of the inductor characteristics, theory of operation, experimental results, and interpretation will be presented.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131378010","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
Halo reduction by means of non linear optical elements in the NLC Final Focus system NLC终焦系统中非线性光学元件的光晕抑制
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-23 DOI: 10.1109/PAC.2001.988267
R. Brinkmann, P. Raimondi
{"title":"Halo reduction by means of non linear optical elements in the NLC Final Focus system","authors":"R. Brinkmann, P. Raimondi","doi":"10.1109/PAC.2001.988267","DOIUrl":"https://doi.org/10.1109/PAC.2001.988267","url":null,"abstract":"In the Beam Delivery Systems (BDS) for linear colliders that have been designed or built, collimators (or scrapers) are used to suppress backgrounds due to the beam halo. Off-energy and off-axis particles are stopped on the collimator jaws, physically limiting the acceptance of the system. This concept does not scale well to higher beam energy, higher intensity or lower emittance. The increased beam density requires longer and more demanding collimator regions. In contrast, this paper studies the possibility of inserting non-linear optical elements into the Final Focus in order to effectively increase the acceptance of the system. This technique could make the traditional collimation scheme obsolete so that only protection collimators would be needed.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134516787","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
High power test of the first S-band rf gun at SRRC 首门s波段射频炮在SRRC的高功率试验
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-23 DOI: 10.1109/PAC.2001.987404
C.H. Ho, S.S. Chang, J. Chiou, C. Fann, K. Hsu, S. Hsu, J. Hwang, W. K. Lau, K.K. Lin, T.T. Yang, M. Yeh, M.L. Hsieh, W. Gai, R. Konecny
{"title":"High power test of the first S-band rf gun at SRRC","authors":"C.H. Ho, S.S. Chang, J. Chiou, C. Fann, K. Hsu, S. Hsu, J. Hwang, W. K. Lau, K.K. Lin, T.T. Yang, M. Yeh, M.L. Hsieh, W. Gai, R. Konecny","doi":"10.1109/PAC.2001.987404","DOIUrl":"https://doi.org/10.1109/PAC.2001.987404","url":null,"abstract":"We had constructed an S-band high power rf system at SRRC (Synchrotron Radiation Research Center). It will be used as a test bench of various designs of S-band rf guns. A 2856 MHz PFN (pulse forming network) system was built to deliver a 2 /spl mu/s, 40 kV voltage pulse at 10 Hz repetition rate for the XK-5 klystron. As a quick start, we had fabricated a 2856 MHz single cell rf gun for the high power test. The recent results are reported.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131680562","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
The radiation environment in and near high gradient RF cavities 高梯度射频腔内及其附近的辐射环境
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-23 DOI: 10.1109/PAC.2001.986492
J. Norem, S. Geer, A. Moretti, M. Popovic, N. Solomey, L. Ducas
{"title":"The radiation environment in and near high gradient RF cavities","authors":"J. Norem, S. Geer, A. Moretti, M. Popovic, N. Solomey, L. Ducas","doi":"10.1109/PAC.2001.986492","DOIUrl":"https://doi.org/10.1109/PAC.2001.986492","url":null,"abstract":"The radiation environment in and near high gradient RF cavities is very important for the instrumentation of the MUCOOL experiment, since large fluxes of X rays and dark current electrons can interfere with the operation of the muon detectors. We have measured the X ray and dark current spectra from a single cell, 1.3 GHz, and are beginning to make more extensive measurements of a multicelled 805 MHz cavity. The results are consistent with electron field emission, bremsstrahlung and photon absorption/scattering. We discuss ways of minimizing this background and the scaling of these results to other cavities.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122259040","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
Tunability of the NLC Final Focus system NLC最终对焦系统的可调性
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-23 DOI: 10.1109/PAC.2001.988268
P. Raimondi, A. Seryi, P. Tenenbaum
{"title":"Tunability of the NLC Final Focus system","authors":"P. Raimondi, A. Seryi, P. Tenenbaum","doi":"10.1109/PAC.2001.988268","DOIUrl":"https://doi.org/10.1109/PAC.2001.988268","url":null,"abstract":"The performance of the new NLC Final Focus system has been investigated as a function of the incoming beam characteristics, such as energy, emittances, energy spread. A preliminary study of the tolerances and the tunability of the system is presented in this paper.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117174916","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
Space charge and beam stability of the proposed Fermilab proton driver in Phase I 费米实验室质子驱动器第一阶段的空间电荷和束稳定性
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-20 DOI: 10.1109/PAC.2001.987944
K. Ng, B. Zotter
{"title":"Space charge and beam stability of the proposed Fermilab proton driver in Phase I","authors":"K. Ng, B. Zotter","doi":"10.1109/PAC.2001.987944","DOIUrl":"https://doi.org/10.1109/PAC.2001.987944","url":null,"abstract":"Issues concerning the beam stability of the proposed Fermilab proton driver are studied in its Phase I stage. Although the betatron tune shifts are dominated by the space charge, these shifts are less than 0.25 and will therefore not drive the symmetric and antisymmetric modes of the beam envelope into instability. The longitudinal space-charge force is large and inductive inserts may be needed to compensate for the distortion of the rf potential. Although the longitudinal impedance is space-charge dominated, it will not drive any microwave instability, unless the real part of the impedance coming from the inductive inserts and wall resistivity of the beam tube are large enough. The design of the beam tube is therefore very important in order to limit the flow of eddy current and keep wall resistivity low. The transverse impedance is also space-charge dominated. With the proton driver operated at an imaginary transition gamma, however, Landau damping will never be canceled and the beam stability can be maintained with negative chromaticities.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124548141","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
Progress toward high energy electron cooling 高能电子冷却的研究进展
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-20 DOI: 10.1109/PAC.2001.987613
S. Nagaitsev
{"title":"Progress toward high energy electron cooling","authors":"S. Nagaitsev","doi":"10.1109/PAC.2001.987613","DOIUrl":"https://doi.org/10.1109/PAC.2001.987613","url":null,"abstract":"All electron cooling systems in operation to date can be classified as low energy systems. The electron beam kinetic energy in such a system is limited to about 0.6-1 MeV by the use of a conventional commercial Cockcroft-Walton high-voltage power supply. This, in turn, bounds the maximum ion kinetic energy, accessible for cooling with today's standard technology, to about 2 GeV/nucleon (about a factor of 2-3 times higher than the electron systems in operation today). Electron cooling systems with kinetic energies above 1 MeV could provide economically justifiable improvements in the performance of many existing and proposed accelerator complexes, such as RHIC, Tevatron and HERA. This paper reviews the status of the development of the technology needed for high energy electron cooling.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114537694","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
Muon ring cooler for the MUCOOL experiment MUCOOL实验用μ子环冷却器
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-20 DOI: 10.1109/PAC.2001.988280
V. Balbekov, S. Geer, N. Mokhov, R. Raja, Z. Usubov
{"title":"Muon ring cooler for the MUCOOL experiment","authors":"V. Balbekov, S. Geer, N. Mokhov, R. Raja, Z. Usubov","doi":"10.1109/PAC.2001.988280","DOIUrl":"https://doi.org/10.1109/PAC.2001.988280","url":null,"abstract":"A possibility to use a ring cooler for the MUCOOL experiment is considered. The cooler is a ring accelerator of about 37 m in circumference consisting of 8 dipole magnets, 4 short solenoids with a field flip of /spl plusmn/2.5 T, and 4 long solenoids with adiabatic field 2-5 T. The 201.25 MHz linacs provide accelerating gradient 15 MV/min in the long straight sections. Four 1.3 m long liquid hydrogen absorbers are put between the linacs for transverse cooling, and LiH wedge absorbers in the short SS are used for the emittance exchange. To simplify the injection problem, /spl pi/-/spl mu/-production on an internal target is considered as an option for the MUCOOL experiment.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"242 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121984332","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: 21
Ion beam notcher using a laser 使用激光的离子束切槽器
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-20 DOI: 10.1109/PAC.2001.988295
R. Tomlin
{"title":"Ion beam notcher using a laser","authors":"R. Tomlin","doi":"10.1109/PAC.2001.988295","DOIUrl":"https://doi.org/10.1109/PAC.2001.988295","url":null,"abstract":"The FNAL LINAC will soon be asked to produce a beam at 7.5 Hz. FNAL LINAC extraction involves sweeping the H/sup -/ beam over a Lambertson magnet. The higher repetition rates are expected to activate the Lamberston magnet. A pulsed laser has been installed to make a notch in the beam so that beam will not sweep over the magnet.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"267 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115832763","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
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