T
Teruaki Hasegawa
Publications - 9
Citations - 1548
Teruaki Hasegawa is an academic researcher. The author has contributed to research in topics: Free-electron laser & SACLA. The author has an hindex of 4, co-authored 8 publications receiving 1382 citations.
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Journal ArticleDOI
A compact X-ray free-electron laser emitting in the sub-ångström region
Tetsuya Ishikawa,Hideki Aoyagi,Takao Asaka,Yoshihiro Asano,Noriyoshi Azumi,T. Bizen,H. Ego,Kenji Fukami,Toru Fukui,Yukito Furukawa,Shunji Goto,Hirofumi Hanaki,Toru Hara,Teruaki Hasegawa,Takaki Hatsui,Atsushi Higashiya,T. Hirono,Naoyasu Hosoda,Miho Ishii,Takahiro Inagaki,Yuichi Inubushi,Toshiro Itoga,Yasumasa Joti,Masahiro Kago,Takashi Kameshima,Hiroaki Kimura,Yoichi Kirihara,Akio Kiyomichi,T. Kobayashi,Chikara Kondo,Togo Kudo,Hirokazu Maesaka,Xavier Maréchal,Takemasa Masuda,Shinichi Matsubara,Takahiro Matsumoto,Tomohiro Matsushita,Sakuo Matsui,Mitsuru Nagasono,Nobuteru Nariyama,Haruhiko Ohashi,Toru Ohata,Takashi Ohshima,Shun Ono,Yuji Otake,Choji Saji,Tatsuyuki Sakurai,Takahiro Sato,Kei Sawada,T. Seike,Katsutoshi Shirasawa,Takashi Sugimoto,Shinsuke Suzuki,Sunao Takahashi,Hideki Takebe,Kunikazu Takeshita,Kenji Tamasaku,Hitoshi Tanaka,Ryotaro Tanaka,Takashi Tanaka,Tadashi Togashi,Kazuaki Togawa,Atsushi Tokuhisa,Hiromitsu Tomizawa,Kensuke Tono,Shukui Wu,Makina Yabashi,Mitsuhiro Yamaga,Akihiro Yamashita,Kenichi Yanagida,Chao Zhang,Tsumoru Shintake,Hideo Kitamura,Noritaka Kumagai +73 more
TL;DR: In this paper, the SPring-8 Angstrom Compact Free-Electron Laser (CFEL) was used for sub-angstrom fundamental-wavelength lasing at the Tokyo National Museum.
Journal ArticleDOI
Stable operation of a self-amplified spontaneous-emission free-electron laser in the extremely ultraviolet region
Tsumoru Shintake,Hitoshi Tanaka,Toru Hara,Takashi Tanaka,Kazuaki Togawa,Makina Yabashi,Yuji Otake,Yoshihiro Asano,Toru Fukui,Teruaki Hasegawa,Atsushi Higashiya,Naoyasu Hosoda,Takahiro Inagaki,Shinobu Inoue,Yujong Kim,Masanobu Kitamura,Noritaka Kumagai,Hirokazu Maesaka,Sakuo Matsui,Mitsuru Nagasono,Takashi Ohshima,Tatsuyuki Sakurai,Kenji Tamasaku,Yoshihito Tanaka,T. Tanikawa,Tadashi Togashi,Shukui Wu,Hideo Kitamura,Tetsuya Ishikawa,Takao Asaka,T. Bizen,Shunji Goto,T. Hirono,Miho Ishii,Hiroaki Kimura,T. Kobayashi,Takemasa Masuda,Tomohiro Matsushita,Xavier Maréchal,Haruhiko Ohashi,Toru Ohata,Katsutoshi Shirasawa,Tetsuya Takagi,Sunao Takahashi,Masao Takeuchi,Ryotaro Tanaka,Akihiro Yamashita,Kenichi Yanagida,Chao Zhang +48 more
TL;DR: In this paper, the authors achieved stable operation of a free-electron laser (FEL) based on the self-amplified spontaneous emission (SASE) scheme at the SPring-8 Compact SASE Source (SCSS) test accelerator in the extremely ultraviolet region.
Journal ArticleDOI
Low-emittance thermionic-gun-based injector for a compact free-electron laser
Takao Asaka,H. Ego,H. Hanaki,Toru Hara,Taichi Hasegawa,Teruaki Hasegawa,Takahiro Inagaki,T. Kobayashi,Chikara Kondo,Hirokazu Maesaka,Shinichi Matsubara,Sakuo Matsui,Takashi Ohshima,Yuji Otake,Tatsuyuki Sakurai,Shinsuke Suzuki,Yasuyuki Tajiri,Shinichiro Tanaka,Kazuaki Togawa,Hitoshi Tanaka +19 more
TL;DR: In this paper, a low-emittance thermionic-gun-based injector was developed for the x-ray free-electron laser (XFEL) facility known as the SPring-8 angstrom compact free electron laser (SACLA), which has the advantages of maintainability, reliability, and stability over a photocathode radio-frequency (rf) gun because of its robust thermionic cathode.
Journal ArticleDOI
Radiation-induced magnetization reversal causing a large flux loss in undulator permanent magnets
T. Bizen,Ryota Kinjo,Teruaki Hasegawa,Akihiro Kagamihata,Yuichiro Kida,T. Seike,Takahiro Watanabe,Toru Hara,Toshiro Itoga,Yoshihiro Asano,Takashi Tanaka +10 more
TL;DR: An unexpectedly large flux loss observed in permanent magnets in one of the undulators operated in SACLA, the x-ray free electron laser facility in Japan is reported.
A Soft X-Ray Free-Electron Laser Beamline of SACLA
Kazuaki Togawa,Takao Asaka,Noriyoshi Azumi,T. Bizen,Toru Fukui,Toru Hara,Teruaki Hasegawa,Naoyasu Hosoda,Takahiro Inagaki,Tetsuya Ishikawa,Hiroaki Kimura,Ryota Kinjo,Chikara Kondo,Hirokazu Maesaka,Shinichi Matsubara,Sakuo Matsui,Kyo Nakajima,Takashi Ohshima,Yuji Otake,Shigeki Owada,Tatsuyuki Sakurai,Hitoshi Tanaka,Takashi Tanaka,Tadashi Togashi,Kensuke Tono,Makina Yabashi +25 more
TL;DR: The SACLA-beamline-1 has been upgraded from spontaneous radiation to a soft x-ray FEL beamline, which generates FEL lights over a wide wavelength range from the extreme-ultraviolet to the soft X-ray regions.