Author: Vormann, H.
Paper Title Page
MOPS028 An Ion Beam Matching to a Linac Accelerating-focusing Channel 661
 
  • A. Orzhekhovskaya, W.A. Barth, G. Clemente, L.A. Dahl, P. Gerhard, L. Groening, M. Kaiser, M.T. Maier, S. Mickat, B. Schlitt, H. Vormann, S.G. Yaramyshev
    GSI, Darmstadt, Germany
  • U. Ratzinger
    IAP, Frankfurt am Main, Germany
  
  Funding: Work supported by HIC for FAIR
A mod­ern lin­ear ac­cel­er­a­tor of ions is a long chain of dif­fer­ent ac­cel­er­at­ing-fo­cus­ing struc­tures. The de­sign of new linacs, as well as an up­grade and op­ti­miza­tion of op­er­at­ing fa­cil­i­ties, re­quires pre­cise and re­li­able beam match­ing with the sub­se­quent sec­tions. Prop­er match­ing of the beam to the chan­nel al­lows to im­prove the per­for­mance of the whole linac and to re­duce the spe­cif­ic costs. Ad­di­tion­al­ly it helps to avoide par­ti­cle loss in high en­er­gy high in­ten­si­ty linacs. Gen­er­al­ly a match­ing al­go­rithm com­bines pre­cise­ly mea­sured or cal­cu­lat­ed ac­cel­er­at­ing-fo­cus­ing ex­ter­nal fields and ex­per­i­men­tal­ly ob­tained de­tails of the beam pa­ram­e­ters with an ad­vanced code for beam dy­nam­ics sim­u­la­tions in­clud­ing space charge ef­fects. Ex­per­i­men­tal re­sults are in­tro­duced into a code as input data. The de­scribed al­go­rithm has al­ready been suc­cess­ful­ly im­ple­ment­ed for sev­er­al GSI pro­jects: an up­grade of the GSI heavy ion linac UNI­LAC, an ion linac for the can­cer ther­a­py, the pro­ton linac for the FAIR fa­cil­i­ty, a fa­cil­i­ty for laser ac­cel­er­a­tion of ions and oth­ers. Mea­sured data and re­sults of beam dy­nam­ics sim­u­la­tions lead­ing to an achieved im­prove­ment of the linac per­for­mance are pre­sent­ed.