Author: Zhao, H.W.
Paper Title Page
MOYLR05
 Beam Physics and Technology Challenge for Multi-MW CW Proton Linac  
 
  • H.W. Zhao, Y. He
    IMP, Lanzhou, People's Republic of China
  
  Multi-MW CW pro­ton linac has found sig­nif­i­cant ap­pli­ca­tions in par­ti­cle physics re­search, nu­clear physics re­search and var­i­ous neu­tron sources such as ADS. How­ever, cur­rently there has not been any MW-level CW pro­ton linac in rou­tine op­er­a­tion due to beam physics chal­lenge and tech­nol­ogy chal­lenge al­though a lot of R&D ac­tiv­i­ties have being con­ducted world­wide in the last decades. Tak­ing 15 MW@​10 mA ADS pro­ton linac as a de­sign ex­am­ple, this talk will ad­dress the key points of the beam physics chal­lenge would be space charge with strong non­lin­ear re­pul­sive forces, beam halo match and beam in­sta­bil­ity. Beam dy­nam­ics sim­u­la­tion and beam op­ti­miza­tion through com­puter codes with at least 100000 ref­er­ence par­ti­cles have be­come sig­nif­i­cant to val­i­date the beam dy­nam­ics de­sign and keep the un­con­trolled beam losses below 1 W/m. We must also take up a lot of tech­nol­ogy chal­lenges, such as pro­ton source with min­i­mum num­bers of beam trip, CW pro­ton RFQ, high gra­di­ent SRF cav­ity, in­te­grated cry­omod­ule with multi-cav­i­ties, non-in­ter­cep­tive di­ag­nos­tics, beam col­li­ma­tion, beam loss de­tec­tion and con­trol, beam trip mit­i­ga­tion, ma­chine pro­tec­tion and high power beam tun­ing.  
slides icon Slides MOYLR05 [8.690 MB]  
 
THO2AB01 ECRIS Developments Towards Intense High Brightness Highly-charged Ion Beams 363
 
  • L.T. Sun, X. Fang, Y.C. Feng, J.W. Guo, W. Lu, C. Qian, Y. Yang, W.H. Zhang, X.Z. Zhang, H.W. Zhao
    IMP, Lanzhou, People's Republic of China
  
  To meet the in­creas­ing needs of mod­ern heavy ion ac­cel­er­a­tors, a ECR ion source must be de­vel­oped to de­liver high in­ten­sity high bright­ness high charge state ion beams, in terms of ac­cel­er­a­tor out­put power and beam trans­mis­sion ef­fi­ciency. With the suc­cess in sev­eral lab­o­ra­to­ries on fully su­per­con­duct­ing ECR ion source de­vel­op­ment, the per­for­mance of highly charged heavy ion beams have been greatly en­hanced. For in­stance, U33+ in­ten­sity had been dou­bled in 2011 by VENUS source at LBNL. This paper will pre­sent the de­vel­op­ment work at IMP to­wards a high per­for­mance ECR ion source. Re­cent high in­ten­sity bis­muth re­sults will be given, such as 710 eμA Bi30+ with SE­CRAL source. The first room tem­per­a­ture ECR ion source using evap­o­ra­tive cool­ing tech­nique will also be re­viewed. And the dis­cus­sion of ECRIS ex­trac­tion and trans­mis­sion beam line on ion beam qual­ity will also be pre­sented in this paper.  
slides icon Slides THO2AB01 [4.401 MB]