[D-1-3] Controlling the pulse duration of X ray free electron lasers with rotated inclined crystals 〇Shota Nakano1, Taito Osaka2, Shotaro Matsumura1, Yasuhisa Sano1, Kazuto Yamauchi1, Makina Yabashi2 (1.Osaka University, 2.RIKEN SPring-8 Center) Keywords:Others、pulse duration 、ray tracing