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Bizen, T.

Paper Title Page
WEPEB068 Feasibility Tests of the Beam Halo Monitoring System for Protecting Undulator Permanent Magnets against Radiation Damage at XFEL/SPring-8 2851
 
  • H. Aoyagi, T. Bizen, N. Nariyama
    JASRI/SPring-8, Hyogo-ken
  • Y. Asano, T. Itoga, H. Kitamura, T. Tanaka
    RIKEN/SPring-8, Hyogo
  
 

A beam halo re­gion of an elec­tron beam at a lin­ear ac­cel­er­a­tor might hit the un­du­la­tor mag­nets and de­grade un­du­la­tor per­ma­nent mag­nets. An in­ter­lock sen­sor is in­dis­pens­able to pro­tect the mag­nets against ra­di­a­tion dam­age. We have been de­vel­op­ing an elec­tron beam halo mon­i­tor using di­a­mond de­tec­tors for an in­ter­lock sen­sor at the X-ray free elec­tron laser fa­cil­i­ty at SPring-8 (XFEL/SPring-8). The di­a­mond de­tec­tors are op­er­at­ed in pho­to­con­duc­tive mode. Pulse-by-pulse mea­sure­ments are adopt­ed to sup­press the back­ground noise ef­fi­cient­ly. The fea­si­bil­i­ty tests of this mon­i­tor have been per­formed at the SPring-8 com­pact SASE source (SCSS) test ac­cel­er­a­tor for XFEL/SPring-8, and the re­sults will be sum­ma­rized.