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O'Hara, J.F.

Paper Title Page
MOPD062 H-Mode Accelerating Structures with PMQ Focusing for Low-Beta Ion Beams 828
 
  • S.S. Kurennoy, J.F. O'Hara, E.R. Olivas, L. Rybarcyk
    LANL, Los Alamos, New Mexico
  
 

We are de­vel­op­ing high-ef­fi­cien­cy nor­mal-con­duct­ing RF ac­cel­er­at­ing struc­tures based on in­ter-dig­i­tal H-mode (IH) cav­i­ties and the trans­verse beam fo­cus­ing with per­ma­nent-mag­net quadrupoles (PMQ), for beam ve­loc­i­ties in the range of a few per­cent of the speed of light. Such IH-PMQ ac­cel­er­at­ing struc­tures fol­low­ing a short RFQ can be used in the front end of ion linacs or in stand-alone ap­pli­ca­tions, e.g. a com­pact deuteron-beam ac­cel­er­a­tor up to the en­er­gy of sev­er­al MeV. Re­sults of com­bined 3-D mod­el­ing for a full IH-PMQ ac­cel­er­a­tor tank ' elec­tro­mag­net­ic com­pu­ta­tions, beam-dy­nam­ics sim­u­la­tions with high cur­rents, and ther­mal-stress anal­y­sis ' are pre­sent­ed. The ac­cel­er­at­ing field pro­file in the tank is tuned to pro­vide the best beam prop­a­ga­tion using cou­pled it­er­a­tions of elec­tro­mag­net­ic and beam-dy­nam­ics mod­el­ing. A cold model of the IH-PMQ tank is being man­u­fac­tured.