Author: Voronkov, A.V.
Paper Title Page
MOPS037 High Intensity Transient Beam Dynamic Study in Travelling Wave Electron Accelerators with Accounting of Beam Loading Effect 682
 
  • S.M. Polozov, T.V. Bondarenko, E.S. Masunov, V.I. Rashchikov, A.V. Voronkov
    MEPhI, Moscow, Russia
  
  The beam load­ing ef­fect is one of main prob­lems lim­it­ing the beam cur­rent. The meth­ods of beam dy­nam­ic sim­u­la­tion tak­ing into ac­count the beam load­ing ef­fect were dis­cussed pre­vi­ous­ly. Sim­u­la­tion meth­ods and the es­pe­cial code ver­sion BEAM­DU­LAD-BL was de­scribed in the paper*. The beam load­ing ef­fect was con­sid­ered only for trav­el­ing wave linacs and for sta­tion­ary beam only. Now it is im­por­tant to study the beam dy­nam­ics of short cur­rent puls­es, i.e. for tran­sient pro­cess. We can con­sid­er only one beam bunch (or a pack­et of bunch­es) in a long ex­ter­nal RF field pulse in sta­tion­ary case. The beam ra­di­a­tion and wave fields can be cal­cu­lat­ed in the quasi-stat­i­cal­ly ap­prox­i­ma­tion. This ap­prox­i­ma­tion can not be used for tran­sient mode. The meth­ods of beam dy­nam­ics sim­u­la­tion will be dis­cussed in this paper for tran­sient mode. New code ver­sion BEAM­DU­LAC-BLNS will be de­scribed. The sim­ple test sim­u­la­tions will be car­ried out.
* A.V. Voronkov et al., "Beam Loading Effect of High Current Trawling Wave Accelerator Dynamic Study", Proc. of IPAC’10, Kyoto, Japan, TUPEA012, p. 1348 (2010).