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SAPLG01 Advances in Simulation of High Brightness/High Intensity Beams emittance, simulation, linac, electron 1
 
  • J. Qiang
    LBNL, Berkeley, California, USA
  
  High bright­ness/high in­ten­sity beams play an im­por­tant role in ac­cel­er­a­tor based ap­pli­ca­tions by dri­ving x-ray free elec­tron laser (FEL) ra­di­a­tion, pro­duc­ing spal­la­tion neu­trons and neu­tri­nos, and gen­er­at­ing new par­ti­cles in high en­ergy col­lid­ers. In this paper, we re­port on re­cent ad­vances in mod­el­ing the high bright­ness elec­tron beam with ap­pli­ca­tion to the next gen­er­a­tion FEL light sources and in mod­el­ing space-charge ef­fects in high in­ten­sity pro­ton ac­cel­er­a­tors.  
slides icon Slides SAPLG01 [3.914 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICAP2018-SAPLG01  
About • paper received ※ 02 November 2018       paper accepted ※ 19 November 2018       issue date ※ 26 January 2019  
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TUPAG11 ESS Accelerator Lattice Design Studies and Automatic Synoptic Deployment rfq, lattice, simulation, ion-source 285
 
  • Y. Levinsen, R. De Prisco, M. Eshraqi, T.J. Grandsaert, A. Jansson, H. Kocevar, Ø. Midttun, N. Milas, R. Miyamoto, D.C. Plostinar, A. Ponton, T.J. Shea
    ESS, Lund, Sweden
  • H.D. Thomsen
    AU, Aarhus, Denmark
  
  The Eu­ro­pean Spal­la­tion Source (ESS) is cur­rently under con­struc­tion in the south of Swe­den. A highly bril­liant neu­tron source with a 5 MW pro­ton dri­ver will pro­vide state of the art ex­per­i­men­tal fa­cil­i­ties for neu­tron sci­ence. A peak pro­ton beam power in the ac­cel­er­a­tor of 125 MW means that ex­cel­lent con­trol over the beam losses be­comes es­sen­tial. The beam physics de­sign of the ESS ac­cel­er­a­tor is in a TraceWin for­mat, for which we have de­vel­oped re­vi­sion con­trol setup, au­to­mated re­gres­sion analy­sis and de­ploy­ment of syn­op­tic viewer and tab­u­lated spread­sheets. This al­lows for an in­te­grated rep­re­sen­ta­tion of the data that are al­ways kept syn­chro­nized and avail­able to other en­gi­neer­ing dis­ci­plines. The de­sign of the ac­cel­er­a­tor lat­tice has gone through sev­eral major and minor it­er­a­tions which are all care­fully analysed. In this con­tri­bu­tion we pre­sent the sta­tus of the lat­est stud­ies which is the first time a com­plete end-to-end study be­gin­ning from the ion source has been per­formed.  
slides icon Slides TUPAG11 [7.733 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICAP2018-TUPAG11  
About • paper received ※ 18 October 2018       paper accepted ※ 28 January 2019       issue date ※ 26 January 2019  
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TUPAG20 Computational Beam Dynamics Requirements for FRIB linac, ECR, simulation, emittance 303
 
  • P.N. Ostroumov, Y. Hao, T. Maruta, A.S. Plastun, T. Yoshimoto, T. Zhang, Q. Zhao
    FRIB, East Lansing, USA
  
  Funding: Work supported by the U.S. DOE of Science under Cooperative Agreement DE-SC0000661 and the NSF under Cooperative Agreement PHY-1102511, the State of Michigan and Michigan State University.
The Fa­cil­ity for Rare Iso­tope Beams (FRIB) being built at Michi­gan State Uni­ver­sity moved to the com­mis­sioned stage in the sum­mer of 2017. There were ex­ten­sive beam dy­nam­ics sim­u­la­tions in the FRIB dri­ver linac dur­ing the de­sign stage. Re­cently, we have used TRACK and IM­PACT sim­u­la­tion codes to study dy­nam­ics of ion beam con­t­a­m­i­nants ex­tracted from the ECR to­gether with main ion beam. The con­t­a­m­i­nant ion species can pro­duce sig­nif­i­cant losses after the strip­ping. These stud­ies re­sulted in de­vel­op­ment of beam col­li­ma­tion sys­tem at rel­a­tively low en­ergy of 16 MeV/u and room tem­per­a­ture bunch­ers in­stead of orig­i­nally planned SC cav­i­ties. Com­mis­sion­ing of the Front End and the first 3 cry­omod­ules en­abled de­tailed beam dy­nam­ics stud­ies ex­per­i­men­tally which were ac­com­pa­nied with the sim­u­la­tions using above-men­tioned beam dy­nam­ics codes and op­ti­miza­tion code FLAME. There are sig­nif­i­cant chal­lenges in un­der­stand­ing of beam dy­nam­ics in the FRIB linac. The most com­pu­ta­tional chal­lenges are in the fol­low­ing areas: (1) Sim­u­la­tion of the ion beam for­ma­tion and ex­trac­tion from the ECR; (2) De­vel­op­ment of the vir­tual ac­cel­er­a­tor model avail­able on-line both for op­ti­miza­tion and multi-par­ti­cle sim­u­la­tions. The vir­tual model should in­clude re­al­is­tic ac­cel­er­a­tor pa­ra­me­ters in­clud­ing de­vice mis­align­ments; (3) Large scale sim­u­la­tions to sup­port high-power ramp up of the linac with min­i­mized beam losses; (4) In­ter­ac­tion of the beam with the gas strip­per which is the backup op­tion for high power op­er­a­tion of the linac. 		 
slides icon Slides TUPAG20 [5.721 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICAP2018-TUPAG20  
About • paper received ※ 02 November 2018       paper accepted ※ 10 December 2018       issue date ※ 26 January 2019  
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