K
Kenji Fukami
Publications - 29
Citations - 144
Kenji Fukami is an academic researcher. The author has contributed to research in topics: Magnet & Beam (structure). The author has an hindex of 6, co-authored 29 publications receiving 131 citations.
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Journal ArticleDOI
Stable top-up operation at SPring-8
Hitoshi Tanaka,Masatoshi Adachi,Tsuyoshi Aoki,Takao Asaka,Alfred Q. R. Baron,Shin Daté,Kenji Fukami,Yukito Furukawa,Hirofumi Hanaki,Naoyasu Hosoda,Tetsuya Ishikawa,Hiroaki Kimura,Kazuo Kobayashi,T. Kobayashi,Shinji Kohara,Noritaka Kumagai,Mitsuhiro Masaki,Takemasa Masuda,Sakuo Matsui,Akihiko Mizuno,Takeshi Nakamura,Takeshi Nakatani,Takashi Noda,Toru Ohata,Haruo Ohkuma,Takashi Ohshima,Masaya Oishi,Sigeki Sasaki,Jun Schimizu,Masazumi Shoji,Kouichi Soutome,Motohiro Suzuki,Shinsuke Suzuki,Yoshio Suzuki,Shirou Takano,Masaru Takao,Takeo Takashima,Hideki Takebe,Akihisa Takeuchi,Kazuhiro Tamura,Ryotaro Tanaka,Yoshihito Tanaka,Tsutomu Taniuchi,Yukiko Taniuchi,Kouji Tsumaki,Akihiro Yamashita,Kenichi Yanagida,Y. Yoda,Hiroto Yonehara,Tetsuhiko Yorita,Masamichi Yoshioka,Masaki Takata +51 more
TL;DR: The implementation of top-up operation at SPring-8 is described, with a focus on the simultaneous achievement of stability of stored current, beam orbit, purity of an isolated single bunch, and beam injection efficiency.
Journal ArticleDOI
High-energy electron irradiation of NdFeB permanent magnets: Dependence of radiation damage on the electron energy
T. Bizen,Yoshihiro Asano,X. Marechal,T. Seike,Tsuyoshi Aoki,Kenji Fukami,Naoyasu Hosoda,H. Yonehara,Tetsuya Takagi,Toru Hara,Takashi Tanaka,Hideo Kitamura +11 more
TL;DR: In this paper, it was shown that most of the radiation damage happens in a small region around the irradiation axis, and that the contribution of neutrons with large scattering angles or with low energies to the magnetic field change is small.
Journal ArticleDOI
Pulse-by-pulse multi-beam-line operation for x-ray free-electron lasers
Toru Hara,Kenji Fukami,Takahiro Inagaki,Hideaki Kawaguchi,Ryota Kinjo,Chikara Kondo,Yuji Otake,Yasuyuki Tajiri,Hideki Takebe,Kazuaki Togawa,Tatsuya Yoshino,Hitoshi Tanaka,Tetsuya Ishikawa +12 more
TL;DR: In this article, the authors measured coherent synchrotron radiation effects in multibeamline operation and reported the results of a multibase-line operation in a coherent manner.
Journal ArticleDOI
High peak current operation of x-ray free-electron laser multiple beam lines by suppressing coherent synchrotron radiation effects
Toru Hara,Chikara Kondo,Takahiro Inagaki,Kazuaki Togawa,Kenji Fukami,Shingo Nakazawa,Taichi Hasegawa,Osamu Morimoto,Masamichi Yoshioka,Hirokazu Maesaka,Yuji Otake,Hitoshi Tanaka +11 more
TL;DR: In this article, a new beam optics based on two double bend achromat (DBA) structures was introduced for the dogleg to suppress the CSR effects, and high peak current bunches of more than 10 kA were now stably transported through the dog-leg and the laser pulse output was increased by a factor of 2-3.
Journal ArticleDOI
A stable pulsed power supply for multi-beamline XFEL operations
Chikara Kondo,Toru Hara,Toru Fukui,Takahiro Inagaki,Hideki Takebe,Shingo Nakazawa,Kenji Fukami,Yusuke Kawaguchi,Hideaki Kawaguchi,Yuji Otake,Hitoshi Tanaka +10 more
TL;DR: A high-power pulsed PS was developed to drive a kicker magnet installed in a SACLA's beam switching system, which provides a high current stability and generation of controllable, bipolar, and trapezoidal current waveforms at 60 Hz.