Pub Date : 2007-06-25DOI: 10.1109/PAC.2007.4440464
Y. Alexahin, K. Yonehara
For muons with preferable for ionization cooling momentum <300MeV/c the longitudinal motion is naturally undamped. In order to provide the longitudinal damping a correlation between muon momentum and transverse position - described in terms of the dispersion function - should be introduced. In the present report we consider the possibility of dispersion generation in a periodic sequence of alternating solenoids (FOFO channel) by choosing the tune in the second passband (i.e. above half-integer per cell) and tilting the solenoids in adjacent cells in the opposite direction. Analytical estimates for equilibrium emittances and cooling rates are presented.
{"title":"6D ionization cooling channel with resonant dispersion generation","authors":"Y. Alexahin, K. Yonehara","doi":"10.1109/PAC.2007.4440464","DOIUrl":"https://doi.org/10.1109/PAC.2007.4440464","url":null,"abstract":"For muons with preferable for ionization cooling momentum <300MeV/c the longitudinal motion is naturally undamped. In order to provide the longitudinal damping a correlation between muon momentum and transverse position - described in terms of the dispersion function - should be introduced. In the present report we consider the possibility of dispersion generation in a periodic sequence of alternating solenoids (FOFO channel) by choosing the tune in the second passband (i.e. above half-integer per cell) and tilting the solenoids in adjacent cells in the opposite direction. Analytical estimates for equilibrium emittances and cooling rates are presented.","PeriodicalId":446026,"journal":{"name":"2007 IEEE Particle Accelerator Conference (PAC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123668517","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}
Pub Date : 2007-06-25DOI: 10.1109/PAC.2007.4441193
S. Dobert, R. Fandos, A. Grudiev, S. Heikkinen, J. Rodriquez, M. Taborelli, W. Wuensch, C. Adolphsen, L. Laurent
The CLIC study group at CERN has built two X-band HDS (hybrid damped structure) accelerating structures for high-power testing in NLCTA at SLAC. These accelerating structures are novel with respect to their rf- design and their fabrication technique. The eleven-cell constant impedance structures, one made out of copper and one out of molybdenum, are assembled from clamped high-speed milled quadrants. They feature the same heavy higher-order-mode damping as nominal CLIC structures achieved by slotted irises and radial damping waveguides for each cell. The X-band accelerators are exactly scaled versions of structures tested at 30 GHz in the CLIC test facility, CTF3. The results of the X-band tests are presented and compared to those at 30 GHz to determine frequency scaling, and are compared to the extensive copper data from the NLC structure development program to determine material dependence and make a basic validation of the HDS design.
{"title":"High power test of an X-band slotted-iris accelerator structure at NLCTA","authors":"S. Dobert, R. Fandos, A. Grudiev, S. Heikkinen, J. Rodriquez, M. Taborelli, W. Wuensch, C. Adolphsen, L. Laurent","doi":"10.1109/PAC.2007.4441193","DOIUrl":"https://doi.org/10.1109/PAC.2007.4441193","url":null,"abstract":"The CLIC study group at CERN has built two X-band HDS (hybrid damped structure) accelerating structures for high-power testing in NLCTA at SLAC. These accelerating structures are novel with respect to their rf- design and their fabrication technique. The eleven-cell constant impedance structures, one made out of copper and one out of molybdenum, are assembled from clamped high-speed milled quadrants. They feature the same heavy higher-order-mode damping as nominal CLIC structures achieved by slotted irises and radial damping waveguides for each cell. The X-band accelerators are exactly scaled versions of structures tested at 30 GHz in the CLIC test facility, CTF3. The results of the X-band tests are presented and compared to those at 30 GHz to determine frequency scaling, and are compared to the extensive copper data from the NLC structure development program to determine material dependence and make a basic validation of the HDS design.","PeriodicalId":446026,"journal":{"name":"2007 IEEE Particle Accelerator Conference (PAC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125283720","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}
Pub Date : 2007-06-25DOI: 10.1109/PAC.2007.4440442
C. Thoma, T. Hughes
A beam-slice algorithm has been implemented into the LSP particle-in-cell (PIC) code to allow for efficient simulation of beam electron transport through a long accelerator. The slice algorithm pushes beam particles along a virtual axial dimension and performs a field solve on a transverse grid which moves with the particle slice. External electric and magnetic fields are also applied to the slice at each time step. For an axisymmetric beam the slice algorithm is very fast compared to full 2-D r-z PIC simulations. The algorithm calculates beam emittance growth due to mismatch oscillations, in contrast to standard envelope codes which assume constant emittance. Using the slice algorithm we are able to simulate beam transport in the DARHT-2 accelerator at LANL from the region just downstream of the diode to the end of the accelerator, a distance of about 55 meters. Results from the slice simulation are compared to both 2-D PIC simulations in LSP and the beam envelope code LAMDA. The sensitivity of the final emittance to imperfect tuning of the transport solenoids is calculated.
{"title":"A beam-slice algorithm for transport of the darht-2 accelerator","authors":"C. Thoma, T. Hughes","doi":"10.1109/PAC.2007.4440442","DOIUrl":"https://doi.org/10.1109/PAC.2007.4440442","url":null,"abstract":"A beam-slice algorithm has been implemented into the LSP particle-in-cell (PIC) code to allow for efficient simulation of beam electron transport through a long accelerator. The slice algorithm pushes beam particles along a virtual axial dimension and performs a field solve on a transverse grid which moves with the particle slice. External electric and magnetic fields are also applied to the slice at each time step. For an axisymmetric beam the slice algorithm is very fast compared to full 2-D r-z PIC simulations. The algorithm calculates beam emittance growth due to mismatch oscillations, in contrast to standard envelope codes which assume constant emittance. Using the slice algorithm we are able to simulate beam transport in the DARHT-2 accelerator at LANL from the region just downstream of the diode to the end of the accelerator, a distance of about 55 meters. Results from the slice simulation are compared to both 2-D PIC simulations in LSP and the beam envelope code LAMDA. The sensitivity of the final emittance to imperfect tuning of the transport solenoids is calculated.","PeriodicalId":446026,"journal":{"name":"2007 IEEE Particle Accelerator Conference (PAC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125504244","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}
Pub Date : 2007-06-25DOI: 10.1109/PAC.2007.4439997
F. Roncarolo, R. Appleby, R. Jones
The FP420 collaboration aims at designing forward proton tagging detectors to be installed in the LHC sectors 420 meters downstream of the ATLAS and CMS detectors. The experiment increases the impedance of the machine, because it requires an indentation of the beam pipe in the form of a pocket to permit the detector close access to the beam. We investigate the geometric and resistive wall impedance with both numerical simulations and a purpose built experiment.
{"title":"Beam coupling impedance simulations and measurements for the LHC FP420 detector","authors":"F. Roncarolo, R. Appleby, R. Jones","doi":"10.1109/PAC.2007.4439997","DOIUrl":"https://doi.org/10.1109/PAC.2007.4439997","url":null,"abstract":"The FP420 collaboration aims at designing forward proton tagging detectors to be installed in the LHC sectors 420 meters downstream of the ATLAS and CMS detectors. The experiment increases the impedance of the machine, because it requires an indentation of the beam pipe in the form of a pocket to permit the detector close access to the beam. We investigate the geometric and resistive wall impedance with both numerical simulations and a purpose built experiment.","PeriodicalId":446026,"journal":{"name":"2007 IEEE Particle Accelerator Conference (PAC)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125507862","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}
Pub Date : 2007-06-25DOI: 10.1109/PAC.2007.4440019
X. Sun, O. Singh
The Advanced Photon Source storage ring employs a real-time orbit correction system to reduce orbit motion up to 50 Hz. This system uses up to 142 narrow-band rf beam position monitors (Nbbpms) in a correction algorithm by sampling at a frequency of 1.53 kHz. Several Nbbpms exhibit aliasing errors in orbit measurements, rendering these Nbbpms unusable in real-time orbit feedback. The aliasing errors are caused by beating effects of the internal sampling clocks with various other processing clocks residing within the BPM electronics. A programmable external clock has been employed to move the aliasing errors out of the active frequency band of the real-time feedback system (RTFB) and rms beam motion calculation. This paper discusses the process of tuning and provides test results.
{"title":"Tuning the narrow-band beam position monitor sampling clock to remove the aliasing errors in APS storage ring orbit measurements","authors":"X. Sun, O. Singh","doi":"10.1109/PAC.2007.4440019","DOIUrl":"https://doi.org/10.1109/PAC.2007.4440019","url":null,"abstract":"The Advanced Photon Source storage ring employs a real-time orbit correction system to reduce orbit motion up to 50 Hz. This system uses up to 142 narrow-band rf beam position monitors (Nbbpms) in a correction algorithm by sampling at a frequency of 1.53 kHz. Several Nbbpms exhibit aliasing errors in orbit measurements, rendering these Nbbpms unusable in real-time orbit feedback. The aliasing errors are caused by beating effects of the internal sampling clocks with various other processing clocks residing within the BPM electronics. A programmable external clock has been employed to move the aliasing errors out of the active frequency band of the real-time feedback system (RTFB) and rms beam motion calculation. This paper discusses the process of tuning and provides test results.","PeriodicalId":446026,"journal":{"name":"2007 IEEE Particle Accelerator Conference (PAC)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115175026","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}
Pub Date : 2007-06-25DOI: 10.1109/PAC.2007.4440773
W. Bayer, W. Barth, L. Dahl, P. Forck, P. Gerhard, L. Groening, I. Hofmann, S. Yaramyshev, D. Jeon
The GSI UNILAC, a heavy ion linac originally dedicated for low current beam operation, together with the synchrotron SIS 18 will serve as a high current injector for FAIR (international facility for antiproton and ion research). The UNILAC post stripper accelerator consists of five Alvarez tanks with a final energy of 11.4 MeV/u. In order to meet the requirements of FAIR 15 emA 238U28+, transverse normalised emittances of 0.8 m mrad and 2.5 mm mrad an UNILAC upgrade program is foreseen to increase the primary beam intensity as well as the beam brilliance. A detailed understanding of the beam dynamics during acceleration and the transport of space charge dominated beams is necessary. For this purpose the beam brilliance dependency on the phase advances in the Alvarez DTL was studied. Machine investigations were performed with various beam diagnostics devices established in the UNILAC. Measurements done in 2006 using a high intensity heavy ion beam coincide with the beam dynamics work package of the European JRA "high intensity pulsed proton injector" (HIPPI). Results of these measurements are presented as well as corresponding beam dynamics simulations.
GSI UNILAC是一种重离子直线加速器，最初专门用于低电流束流操作，与同步加速器SIS 18一起，将作为FAIR(国际反质子和离子研究设施)的高电流注入器。UNILAC后剥离加速器由5个Alvarez油箱组成，最终能量为11.4 MeV/u。为了满足FAIR 15 emA 238U28+的要求，横向标准化发射为0.8 m mrad和2.5 mm mrad, UNILAC升级计划预计将增加主光束强度和光束亮度。有必要详细了解加速过程中的束流动力学和空间电荷主导束流的输运。为此，研究了Alvarez DTL中光束亮度与相位进动的关系。机器调查是用UNILAC建立的各种光束诊断设备进行的。2006年使用高强度重离子束进行的测量与欧洲JRA“高强度脉冲质子注入器”(HIPPI)的束流动力学工作包相吻合。给出了这些测量结果以及相应的光束动力学模拟。
{"title":"High intensity heavy ion beam emittance measurements at the GSI UNILAC","authors":"W. Bayer, W. Barth, L. Dahl, P. Forck, P. Gerhard, L. Groening, I. Hofmann, S. Yaramyshev, D. Jeon","doi":"10.1109/PAC.2007.4440773","DOIUrl":"https://doi.org/10.1109/PAC.2007.4440773","url":null,"abstract":"The GSI UNILAC, a heavy ion linac originally dedicated for low current beam operation, together with the synchrotron SIS 18 will serve as a high current injector for FAIR (international facility for antiproton and ion research). The UNILAC post stripper accelerator consists of five Alvarez tanks with a final energy of 11.4 MeV/u. In order to meet the requirements of FAIR 15 emA 238U28+, transverse normalised emittances of 0.8 m mrad and 2.5 mm mrad an UNILAC upgrade program is foreseen to increase the primary beam intensity as well as the beam brilliance. A detailed understanding of the beam dynamics during acceleration and the transport of space charge dominated beams is necessary. For this purpose the beam brilliance dependency on the phase advances in the Alvarez DTL was studied. Machine investigations were performed with various beam diagnostics devices established in the UNILAC. Measurements done in 2006 using a high intensity heavy ion beam coincide with the beam dynamics work package of the European JRA \"high intensity pulsed proton injector\" (HIPPI). Results of these measurements are presented as well as corresponding beam dynamics simulations.","PeriodicalId":446026,"journal":{"name":"2007 IEEE Particle Accelerator Conference (PAC)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115254685","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}
Pub Date : 2007-06-25DOI: 10.1109/PAC.2007.4441051
J. Frederico, G. Gatti, S. Reiche, J. Rosenzweig, R. Tikhoplav
This paper presents a detailed computational examination of various physical effects that enter into an innovative approach to inverse free-electron laser (IFEL) acceleration and microbunching experiments, involving use of irises to guide the high power laser beam. In IFELs, there is a great advantage to using long wavelength, and thus diffractive lasers, which are also quite high power. As this scenario presents challenges to the final focusing optics, one must consider guiding, which for present schemes is either too lossy (in metallic guides), or incapable of supporting high fields (as in dielectric guides). Hence we are driven to examine an alternative scheme, that of using the effects of diffraction off of periodically placed metallic irises which have an inner diameter in a relatively low field region. We present below a computational analysis of the wave dynamics associated with the laser beam in this scheme. We then proceed to integrate this type of circularly polarized electromagnetic radiation field into a self- consistent simulation of beam dynamics inside of a helical undulator under construction at the UCLA Neptune Laboratory inverse free-electron laser. With this integrated tool, we then study the degree of microbunching bunching at the laser optical wavelength induced in a relativistic electron beam. Finally, we study the propagation of the beam after the IFEL interaction, including beam self-force (single component plasma) effects, to predict the level of microbunching at the fundamental (laser) frequency and its harmonics that are observed at a detector using coherent transition radiation.
{"title":"Simulation of an iris-guided inverse free-electron laser micro-bunching experiment","authors":"J. Frederico, G. Gatti, S. Reiche, J. Rosenzweig, R. Tikhoplav","doi":"10.1109/PAC.2007.4441051","DOIUrl":"https://doi.org/10.1109/PAC.2007.4441051","url":null,"abstract":"This paper presents a detailed computational examination of various physical effects that enter into an innovative approach to inverse free-electron laser (IFEL) acceleration and microbunching experiments, involving use of irises to guide the high power laser beam. In IFELs, there is a great advantage to using long wavelength, and thus diffractive lasers, which are also quite high power. As this scenario presents challenges to the final focusing optics, one must consider guiding, which for present schemes is either too lossy (in metallic guides), or incapable of supporting high fields (as in dielectric guides). Hence we are driven to examine an alternative scheme, that of using the effects of diffraction off of periodically placed metallic irises which have an inner diameter in a relatively low field region. We present below a computational analysis of the wave dynamics associated with the laser beam in this scheme. We then proceed to integrate this type of circularly polarized electromagnetic radiation field into a self- consistent simulation of beam dynamics inside of a helical undulator under construction at the UCLA Neptune Laboratory inverse free-electron laser. With this integrated tool, we then study the degree of microbunching bunching at the laser optical wavelength induced in a relativistic electron beam. Finally, we study the propagation of the beam after the IFEL interaction, including beam self-force (single component plasma) effects, to predict the level of microbunching at the fundamental (laser) frequency and its harmonics that are observed at a detector using coherent transition radiation.","PeriodicalId":446026,"journal":{"name":"2007 IEEE Particle Accelerator Conference (PAC)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116517206","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}
Pub Date : 2007-06-25DOI: 10.1109/PAC.2007.4440927
D. Raparia, J. Alessi, A. Kponou, A. Pikin, J. Ritter, S. Minaev, U. Ratzinger, A. Schempp, R. Tiede
The EBIS Project at Brookhaven National Laboratory is in the second year of a four-year project. It will replace the Tandem Van de Graaff accelerators with an Electron Beam Ion Source, an RFQ, and one IH Linac cavity, as the heavy ion preinjector for the Relativistic Heavy Ion Collider (RHIC), and for the NASA Space Radiation Laboratory (NSRL). The preinjector will provide all ions species, He to U, (Q/m >0.16) at 2 MeV/amu at a repetition rate of 5 Hz, pulse length of 10-40 mus, and intensities of ~2.0 mA. End-to-end simulations (from EBIS to the Booster injection) as well as error sensitivity studies will be presented and physics issues will be discussed.
{"title":"End-to-end simulations for the EBIS preinjector","authors":"D. Raparia, J. Alessi, A. Kponou, A. Pikin, J. Ritter, S. Minaev, U. Ratzinger, A. Schempp, R. Tiede","doi":"10.1109/PAC.2007.4440927","DOIUrl":"https://doi.org/10.1109/PAC.2007.4440927","url":null,"abstract":"The EBIS Project at Brookhaven National Laboratory is in the second year of a four-year project. It will replace the Tandem Van de Graaff accelerators with an Electron Beam Ion Source, an RFQ, and one IH Linac cavity, as the heavy ion preinjector for the Relativistic Heavy Ion Collider (RHIC), and for the NASA Space Radiation Laboratory (NSRL). The preinjector will provide all ions species, He to U, (Q/m >0.16) at 2 MeV/amu at a repetition rate of 5 Hz, pulse length of 10-40 mus, and intensities of ~2.0 mA. End-to-end simulations (from EBIS to the Booster injection) as well as error sensitivity studies will be presented and physics issues will be discussed.","PeriodicalId":446026,"journal":{"name":"2007 IEEE Particle Accelerator Conference (PAC)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122311702","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}
Pub Date : 2007-06-25DOI: 10.1109/PAC.2007.4440067
R. England, B. O'Shea, J. Rosenzweig, G. Travish, D. Alesini
A 9-cell standing-wave deflecting cavity has recently been constructed and installed at the UCLA Neptune Laboratory for use as a temporal diagnostic for the 13 MeV, 300 to 700 pC electron bunches generated by the Neptune photoinjector beamline. The cavity is a center-fed Glid- Cop structure operating in at TM110-like deflecting mode at 9.59616 GHz with a pi phase advance per cell. At the maximum deflecting voltage of 530 kV, the theoretical resolution limit of the device is 50 fs, although with current beam parameters and a RMS spot size of 460 mum the effective resolution is approximately 400 fs. We discuss the operation and testing of the cavity as well as its intended application of measuring the temporal current profile of ramped electron bunches generated using the Neptune dogleg compressor, and we present the first measurements of the electron beam current profile obtained using the deflecting cavity.
{"title":"Commissioning of the UCLA Neptune x-band deflecting cavity and applications to current profile measurement of ramped electron bunches","authors":"R. England, B. O'Shea, J. Rosenzweig, G. Travish, D. Alesini","doi":"10.1109/PAC.2007.4440067","DOIUrl":"https://doi.org/10.1109/PAC.2007.4440067","url":null,"abstract":"A 9-cell standing-wave deflecting cavity has recently been constructed and installed at the UCLA Neptune Laboratory for use as a temporal diagnostic for the 13 MeV, 300 to 700 pC electron bunches generated by the Neptune photoinjector beamline. The cavity is a center-fed Glid- Cop structure operating in at TM110-like deflecting mode at 9.59616 GHz with a pi phase advance per cell. At the maximum deflecting voltage of 530 kV, the theoretical resolution limit of the device is 50 fs, although with current beam parameters and a RMS spot size of 460 mum the effective resolution is approximately 400 fs. We discuss the operation and testing of the cavity as well as its intended application of measuring the temporal current profile of ramped electron bunches generated using the Neptune dogleg compressor, and we present the first measurements of the electron beam current profile obtained using the deflecting cavity.","PeriodicalId":446026,"journal":{"name":"2007 IEEE Particle Accelerator Conference (PAC)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122549122","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}
Pub Date : 2007-06-25DOI: 10.1109/PAC.2007.4440457
A. Xiao, M. Borland, L. Emery, Y. Wang, K. Ng
A direct space-charge force model has been implemented in the tracking code elegant [1]. The user can simulate transverse space-charge effects by inserting space- charge elements in the beamline at any desired position. Application to the international linear collider damping ring is presented in this paper. We simulated beam under equilibrium conditions, as well as the entire damping cycle from injection to extraction. Results show that beam halo is generated due to space-charge effects. This would be a significant concern for the ILC damping ring and a detailed follow-up study is needed.
{"title":"Direct space-charge calculation in elegant and its application to the ilc damping ring","authors":"A. Xiao, M. Borland, L. Emery, Y. Wang, K. Ng","doi":"10.1109/PAC.2007.4440457","DOIUrl":"https://doi.org/10.1109/PAC.2007.4440457","url":null,"abstract":"A direct space-charge force model has been implemented in the tracking code elegant [1]. The user can simulate transverse space-charge effects by inserting space- charge elements in the beamline at any desired position. Application to the international linear collider damping ring is presented in this paper. We simulated beam under equilibrium conditions, as well as the entire damping cycle from injection to extraction. Results show that beam halo is generated due to space-charge effects. This would be a significant concern for the ILC damping ring and a detailed follow-up study is needed.","PeriodicalId":446026,"journal":{"name":"2007 IEEE Particle Accelerator Conference (PAC)","volume":"182 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122650322","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}
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