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Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)最新文献

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The ANKA injector ANKA喷油器
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-06-25 DOI: 10.1109/PAC.1997.749921
D. Einfeld, F. Pérez, R. Rossmanith, R. Walther
{"title":"The ANKA injector","authors":"D. Einfeld, F. Pérez, R. Rossmanith, R. Walther","doi":"10.1109/PAC.1997.749921","DOIUrl":"https://doi.org/10.1109/PAC.1997.749921","url":null,"abstract":"ANKA is a 2.5 GeV synchrotron radiation storage ring under construction at the Forschungszentrum Karlsruhe in Germany. The beam is accelerated up to 0.5 GeV in a booster synchrotron and afterwards injected into ANKA. In ANKA the beam is accumulated to 200 mA (second stage: 400 mA) and afterwards accelerated to 2.5 GeV. The injector system will consist of a pre-injector with an end energy of 20 or 50 MeV, a booster synchrotron and transport channels. The booster synchrotron should be as simple and inexpensive as possible. In the following three different concepts for designing the booster synchrotron are compared.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"171 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133573702","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 and analysis of static deflections from transverse long-range wakefields in the SLC SLC中横向长程尾流场的静态偏转观测与分析
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.749712
R. Assmann, F. Decker, P. Raimondi, T. Raubenheimer
{"title":"Observation and analysis of static deflections from transverse long-range wakefields in the SLC","authors":"R. Assmann, F. Decker, P. Raimondi, T. Raubenheimer","doi":"10.1109/PAC.1997.749712","DOIUrl":"https://doi.org/10.1109/PAC.1997.749712","url":null,"abstract":"In the SLC main linac a train of three bunches is accelerated. The leading positron bunch is followed by two bunches of electrons. When the positron bunch passes off-axis through the RF structures, it excites dipole modes in the structures, for example long-range transverse wakefields which deflect the subsequent electron bunches. Although the magnitude of the deflections is small one can infer the deflections by measuring the trajectory difference while changing the spacing between the positron and electron bunches. Knowing the positron trajectory the misalignments of the accelerating RF structures with respect to the BPM's can be calculated. We present measurements from the SLC linac and discuss the data analysis and errors.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115112916","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
Considerations on particle dynamics in a heavy ion DTL 重离子DTL中粒子动力学的思考
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.751054
H. Deitinghoff, G. Parisi
{"title":"Considerations on particle dynamics in a heavy ion DTL","authors":"H. Deitinghoff, G. Parisi","doi":"10.1109/PAC.1997.751054","DOIUrl":"https://doi.org/10.1109/PAC.1997.751054","url":null,"abstract":"In heavy ion inertial fusion scenarios presently discussed, a long linac is proposed for the acceleration of intense beams of singly charged heavy ions, e.g. Bi/sup +/ or Pt/sup +/. A particle dynamics layout of a conventional DTL has been attempted with respect to low emittance growth at high transmission for beam currents up to 400 mA. Design aspects and first results of single particle beam dynamics calculations will be presented.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115379428","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
Search for trapped modes in TESLA cavities 在特斯拉腔中寻找捕获模式
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.749745
F. Marhauser, H. Glock, P. Hulsmann, M. Kurz, H. Klein
{"title":"Search for trapped modes in TESLA cavities","authors":"F. Marhauser, H. Glock, P. Hulsmann, M. Kurz, H. Klein","doi":"10.1109/PAC.1997.749745","DOIUrl":"https://doi.org/10.1109/PAC.1997.749745","url":null,"abstract":"In resonant cavities which are connected via beam pipes fields usually tend to propagate with shrinking wavelengths. Nevertheless there may also exist some non-propagating resonant modes (\"trapped modes\") in the frequency range above the beam-pipe cut-off with relative high shunt impedances which are strongly localised in the inner part of a accelerating structure. Due to their field distributions these trapped modes can hardly be coupled to dampers at the ends of the cavity and therefore could have dangerous effects to beam dynamics. Their detection is very difficult, if one considers that they are embedded in a spectrum of several hundred resonant modes. We therefore started to search trapped modes in a 9-cell copper TESLA cavity. The principles of our method and results from measurements are presented in this paper.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115402077","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
Centroid and emittance of a kicked beam in rings 环形踢梁的质心和发射度
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.749642
Chun-xi Wang, J. Irwin
{"title":"Centroid and emittance of a kicked beam in rings","authors":"Chun-xi Wang, J. Irwin","doi":"10.1109/PAC.1997.749642","DOIUrl":"https://doi.org/10.1109/PAC.1997.749642","url":null,"abstract":"We generalize the existing decoherence theory of a kicked beam to linearly uncoupled 4D transverse phase space. Analytical results for the beam centroid motion as well as beam emittance (i.e., 1st and 2nd order beam moments) are given. We formulate the problem in the language of one-turn map and normal form theory in order to emphasize the approximations used and facilitate further generalizations. We will not discuss the chromaticity decoherence factor, which can be found in the references.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115406503","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
First observation of the deflection of a 33 TeV Pb ion beam in a bent silicon crystal 首次观察到33 TeV铅离子束在弯曲硅晶体中的偏转
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.749579
C. Biino, M. Clément, N. Doble, K. Elsener, L. Gatignon, P. Grafstrom, U. Mikkelsen, A. Taratin, S. Møller, E. Uggerhøj, P. Keppler, J. Major
{"title":"First observation of the deflection of a 33 TeV Pb ion beam in a bent silicon crystal","authors":"C. Biino, M. Clément, N. Doble, K. Elsener, L. Gatignon, P. Grafstrom, U. Mikkelsen, A. Taratin, S. Møller, E. Uggerhøj, P. Keppler, J. Major","doi":"10.1109/PAC.1997.749579","DOIUrl":"https://doi.org/10.1109/PAC.1997.749579","url":null,"abstract":"For the first time, the deflection of an ultra-relativistic, fully stripped Pb/sup 82+/ ion beam in a bent silicon crystal has been observed. The ions were provided by the CERN-SPS in the H4 beam at a momentum of 400 GeV/c per unit of charge. A 60 mm long silicon crystal, bent over 50 mm to give a 4 mrad deflection angle, was used in this experiment. The measured Pb ion deflection efficiency is comparable to the one obtained with protons at an equivalent ratio of momentum per charge, and is found to be about 15% for a beam with a divergence of 35 microradians (FWHM). The interaction rate observed in a background counter is found to drop when the crystal is well aligned with the beam. This corroborates further the channeling model, which predicts that channeled ions are steered away from regions of high electron densities as well as the nuclei in the crystal.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115507920","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
Status of the APS diagnostics undulator beamline APS诊断波束线的状态
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.751157
Bingxin X. Yang, A. Lumpkin, G. Goeppner, S. Sharma, E. Rotela, I. Sheng, E. Moog
{"title":"Status of the APS diagnostics undulator beamline","authors":"Bingxin X. Yang, A. Lumpkin, G. Goeppner, S. Sharma, E. Rotela, I. Sheng, E. Moog","doi":"10.1109/PAC.1997.751157","DOIUrl":"https://doi.org/10.1109/PAC.1997.751157","url":null,"abstract":"We report the status of the diagnostics undulator beamline for the Advanced Photon Source (APS) storage ring. The beamline was designed for the characterization of the 7-GeV, low-emittance positron beam at high resolution. The special diagnostics undulator has been manufactured by STI Optronics. The device exhibits very low magnetic field errors at closed gap of 10.5 mm: first field integral less than 15 gauss/spl middot/cm, and optical phase error less than 1.5/spl deg/. The front end of the beamline and a monochromator are installed and tested for use on divergence and directional stability measurements with a target resolution of 3 /spl mu/rad utilizing the first harmonic radiation of 25 keV. Initial results for the divergence measurement show that the storage ring is operating well within its design goals.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124396490","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: 10
Impedance studies for BEPC BEPC的阻抗研究
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.750818
F. Zhou, Z.Y. Guo, S. Wang, G. Wang, C. X. Tang
{"title":"Impedance studies for BEPC","authors":"F. Zhou, Z.Y. Guo, S. Wang, G. Wang, C. X. Tang","doi":"10.1109/PAC.1997.750818","DOIUrl":"https://doi.org/10.1109/PAC.1997.750818","url":null,"abstract":"This paper focuses on the impedances from various beam-line elements in the BEPC with and without vacuum chamber upgrade. We also discuss their power depositions generated by a beam in the form of the High-Order-Mode (HOM) losses by interacting with its surroundings.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116649830","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
Numerical optimization of collimator jaw orientations and locations in the LHC 大型强子对撞机准直钳爪方向和位置的数值优化
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.749575
D. Kaltchev, M. Craddock, R. Servranckx
{"title":"Numerical optimization of collimator jaw orientations and locations in the LHC","authors":"D. Kaltchev, M. Craddock, R. Servranckx","doi":"10.1109/PAC.1997.749575","DOIUrl":"https://doi.org/10.1109/PAC.1997.749575","url":null,"abstract":"The collimation system of LHC will consist of flat collimator jaws distributed along the IR7 lattice with the aim of limiting the maximum combined amplitudes of secondary halo particles (born along the edges of the primary collimators). The code DJ (Distribution of Jaws) computes this amplitude using a quasi-analytic algorithm (no tracking), by which the maximum initial angles are found, corresponding to trajectories escaping all secondary jaws. We report the latest version of DJ, which contains the following enhancements: (1) the orientation of each pair of jaws is a free variable (instead of using only vertical, horizontal, or 45/spl deg/ skew jaws); (2) the minimizing method used is \"simulated annealing\", which, for our case of a discontinuous function of up to 32 variables, always finds a global minimum. Different initial jaw distributions lead to different final ones, but they all give essentially the same maximum halo amplitude; this seems to depend only on the number of jaws and the lattice parameters, particularly the tune-split. We discuss lattice characteristics found favorable for collimation.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116860955","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
Beam dynamics in RF-gun cavity with a modified first cell 改进第一单元的射频枪腔内光束动力学
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.752769
V. Volkov, M. Karliner, V. Petrov, I. Sedlyarov, A. Tribendis, D. Janssen, P. vom Stein
{"title":"Beam dynamics in RF-gun cavity with a modified first cell","authors":"V. Volkov, M. Karliner, V. Petrov, I. Sedlyarov, A. Tribendis, D. Janssen, P. vom Stein","doi":"10.1109/PAC.1997.752769","DOIUrl":"https://doi.org/10.1109/PAC.1997.752769","url":null,"abstract":"The results of beam dynamics simulation with bunch charges up to a few tens pC in the superconducting linear accelerator for the ELBE project are presented. The accelerator consists of a 3+1/2 TESLA cells RF-gun and two 9-cell TESLA cavities. It is shown that the change of a flat back wall of the half-cell with cathode in its center by a conical back wall results in reduction of transversal bunch sizes and also of its emittance at the accelerator exit by a factor of 20.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116890494","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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