Author: Tono, K.
Paper Title Page
TUC01 Hard X-ray Self-Seeding Setup and Results at SACLA 603
 
  • T. Inagaki, N. Adumi, T. Hara, T. Ishikawa, R. Kinjo, H. Maesaka, Y. Otake, H. Tanaka, T. Tanaka, K. Togawa, M. Yabashi
    RIKEN SPring-8 Center, Sayo-cho, Sayo-gun, Hyogo, Japan
  • S. Goto, Y. Inubushi, T.K. Kameshima, T. Ohata, K. Tono
    JASRI/SPring-8, Hyogo, Japan
  • T. Hasegawa, S. Tanaka
    SES, Hyogo-pref., Japan
  • H. Kimura, A. Miura, H. Ohashi, H. Yamazaki
    Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), Hyogo, Japan
  
  In order to im­prove the spec­tral and tem­po­ral prop­er­ties of XFEL, the self-seed­ing op­tion based on the trans­mis­sion crys­tal op­tics has been im­ple­mented in SACLA since 2012. The self-seed­ing setup com­posed of four di­pole mag­nets that can gen­er­ate up to 50 fs tem­po­ral delay and a di­a­mond sin­gle crys­tal with the thick­ness of 180 mi­cro-m has been in­stalled at the po­si­tion of the 9th un­du­la­tor seg­ment, which has been moved down­stream. In 2013, the in­stal­la­tion of all the com­po­nents has been com­pleted in Au­gust and the com­mis­sion­ing has been started in Oc­to­ber. After a num­ber of tun­ing processes such as the beam col­li­ma­tion and un­du­la­tor K-value op­ti­miza­tion, sig­nif­i­cant spec­tral nar­row­ing has been con­firmed at 10 keV with the C(400) Bragg re­flec­tion. The spec­tral band­width of seeded FEL is about 3 eV, which is nearly one order nar­rower than that of SASE mea­sured with­out the di­a­mond crys­tal. The peak spec­tral in­ten­sity of seeded FEL is about 5 times higher than that of SASE. Sys­tem­atic op­ti­miza­tion on beam prop­er­ties is now in progress to­wards ex­per­i­men­tal use of seeded XFELs. This talk gives the overview of the plan, achieved re­sults and on­go­ing R&D.  
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