Author: Horino, K.
Paper Title Page
WEPAB245 A Possible Modification of Ceramic Chambers in the Injection Area at the RCS in J-PARC 3205
 
  • Y. Shobuda, K. Horino, J. Kamiya, K. Kotoku, T. Takayanagi, T. Ueno, T. Yanagibashi
    JAEA/J-PARC, Tokai-mura, Japan
  
  The J-PARC RCS is com­posed of ce­ramic cham­bers cov­ered over cop­per stripes to sup­press the eddy cur­rent on the cham­ber. The in­duc­tance, com­pris­ing the cop­per stripes and flanges, in com­bi­na­tion with the ca­pac­i­tors makes an LCR elec­tric cir­cuit with the cham­ber and can cause field mod­u­la­tion in the cham­ber. Though most cham­bers are not harm­ful at the RCS, the cham­bers at the in­jec­tion area ex­cite beam losses, be­cause a trape­zoid field pat­tern is ex­cited to ac­cu­mu­late LINAC beam dur­ing the in­jec­tion pe­riod. In this re­port, we con­sider sev­eral types of ce­ramic cham­bers to sup­press the field mod­u­la­tion. One type is a ce­ramic cham­ber cov­ered over cop­per stripes in par­al­lel with damp­ing re­sis­tors. An­other is that cov­ered over spi­ral cop­per stripes with only ca­pac­i­tors.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB245  
About • paper received ※ 19 May 2021       paper accepted ※ 01 July 2021       issue date ※ 18 August 2021  
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