Author: Yoshimoto, M.
Paper Title Page
MOPME028 A Preliminary Study of the Vibration Wire Monitor for Beam Halo Diagnostic in J-PARC L3BT 535
 
  • K. Okabe, M. Kinsho, K. Yamamoto, M. Yoshimoto
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
  
  In the J-PARC 3-GeV Rapid Cycle Syn­chro­tron (RCS), trans­verse beam halo di­ag­nos­tic and scrap­ing are re­quired to in­crease the out­put beam power. Wire scan­ners and halo scrap­ers were used for mea­sure­ment of pro­jected beam dis­tri­b­u­tions to de­ter­mine the ex­tent of beam halo for­ma­tion at Linac-3GeV Beam Trans­port line (L3BT). In order to de­ter­mine more de­tail of halo for­ma­tion, Vi­bra­tion Wire Mon­i­tor (VWM) was in­stalled in L3BT for the beam halo mea­sure­ment and the of­fline study at the test stand with low en­ergy elec­tron gun are started. The high sen­si­tiv­ity of the VWM makes it a prospec­tive one for in­ves­ti­ga­tion of beam halo and weak beam scan­ning. In this paper, we will re­port a pre­lim­i­nary re­sults of of­fline stud­ies and beam halo mea­sure­ment by VWM at L3BT.  
 
THPWO032 Progress of Injection Energy Upgrade Project for J-PARC RCS 3833
 
  • N. Hayashi, H. Harada, K. Horino, H. Hotchi, J. Kamiya, M. Kinsho, P.K. Saha, Y. Shobuda, T. Takayanagi, N. Tani, T. Togashi, T. Ueno, M. Watanabe, Y. Watanabe, K. Yamamoto, M. Yamamoto, Y. Yamazaki, M. Yoshimoto
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
  • Y. Irie
    KEK, Ibaraki, Japan
  • T. Toyama
    J-PARC, KEK & JAEA, Ibaraki-ken, Japan
  
  The in­jec­tion en­ergy of the J-PARC RCS will be up­graded in 2013. New power sup­plies for the shift bump mag­net sys­tem will be in­stalled. Some of other sys­tems, up­grade of the paint­ing bump power sup­plies and pulse steer­ing sys­tems, are al­ready in­stalled and tested or used for the nom­i­nal op­er­a­tion. The paper re­ports the progress of in­jec­tion en­ergy up­grade pro­ject.  
 
THPWO033 High Intensity Beam Trial of up to 540 kW in J-PARC RCS 3836
 
  • H. Hotchi, H. Harada, N. Hayashi, M. Kinsho, P.K. Saha, Y. Shobuda, F. Tamura, K. Yamamoto, M. Yamamoto, M. Yoshimoto
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
  • Y. Irie
    KEK, Ibaraki, Japan
  • S. Kato
    Tohoku University, Graduate School of Science, Sendai, Japan
  
  Re­cently we have per­formed a high in­ten­sity beam trial of up to 540 kW. In this paper, beam in­ten­sity de­pen­dece and in­jec­tion paint­ing pa­ra­me­ter de­pen­dence of beam loss, ob­served in this beam ex­per­i­ment, will be dis­cussed with the cor­re­spond­ing nu­mer­i­cal sim­u­la­tion re­sults.