Low-emittance radio-frequency electron gun using a gridded thermionic cathode

Autor: Takao Asaka, Takahiro Inagaki, Tamotsu Magome, Nobuyuki Nishimori, Yuji Otake, Tsutomu Taniuchi, Kenich Yanagida, Hitoshi Tanaka

Publikováno v: Physical Review Accelerators and Beams, Vol 23, Iss 6, p 063401 (2020)

We developed an electron gun system capable of delivering high brightness beams to drive soft x-ray free-electron lasers (SXFEL). We modified the conventional radio-frequency (rf) gun concept by using a 50-kV gun with a gridded thermionic cathode con

Externí odkaz: https://doaj.org/article/dd9707f39a534fe8acc47b94bcf47971

Time-interleaved multienergy acceleration for an x-ray free-electron laser facility

Autor: Toru Hara, Kenji Tamasaku, Takao Asaka, Takahiro Inagaki, Yuichi Inubushi, Tetsuo Katayama, Chikara Kondo, Hirokazu Maesaka, Shinichi Matsubara, Takashi Ohshima, Yuji Otake, Tatsuyuki Sakurai, Takahiro Sato, Hitoshi Tanaka, Tadashi Togashi, Kazuaki Togawa, Kensuke Tono, Makina Yabashi, Tetsuya Ishikawa

Publikováno v: Physical Review Special Topics. Accelerators and Beams, Vol 16, Iss 8, p 080701 (2013)

To meet the demand from the growing number of user experiments, multi-beam-line operation with a wide spectral range is seriously considered in x-ray free-electron laser facilities. In a conventional design, the beam line of low photon energies branc

Externí odkaz: https://doaj.org/article/58654b91d47647118df8f24f75771c74

Bunch-by-bunch linac beam energy profile diagnostics using storage ring phase rotation and synchrotron radiation

Autor: Takahiro Matsubara, Shintarou Hisao, Yoshihiko Shoji, Takao Asaka, Shinsuke Suzuki

Publikováno v: Physical Review Special Topics. Accelerators and Beams, Vol 9, Iss 4, p 042801 (2006)

This paper reports a new method of measuring the bunch-by-bunch energy profile of a linear accelerator (linac) electron beam, using a dual-sweep streak camera in the storage ring. This method records the evolution of the time profile in the storage r

Externí odkaz: https://doaj.org/article/e4ee8c8b568b42eeacd18b1e72c6c79b

Low-emittance thermionic-gun-based injector for a compact free-electron laser

Autor: Chikara Kondo, H. Ego, Shinichiro Tanaka, Takashi Ohshima, Hitoshi Tanaka, Shinichi Matsubara, Takao Asaka, Kazuaki Togawa, Hirokazu Maesaka, H. Hanaki, Teruaki Hasegawa, Toru Hara, Taichi Hasegawa, Takahiro Inagaki, T. Kobayashi, Yasuyuki Tajiri, Shinsuke Suzuki, Yuji Otake, Sakuo Matsui, Tatsuyuki Sakurai

Publikováno v: Physical Review Accelerators and Beams, Vol 20, Iss 8, p 080702 (2017)

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). The thermionic-gun-based system has the advantages of maintainability, r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0a9bcec9763c4c1df1c51f2dbd68061
https://doaj.org/article/6f8fd3a422154cfdb603fae5507afcb0

A compact X-ray free-electron laser emitting in the sub-ångström region

Autor: Noritaka Kumagai, Shinichi Matsubara, Takao Asaka, Shinsuke Suzuki, Yukito Furukawa, Hiromitsu Tomizawa, Miho Ishii, Shukui Wu, Kei Sawada, Sunao Takahashi, Sakuo Matsui, Kenji Tamasaku, Kenji Fukami, Hitoshi Tanaka, Kunikazu Takeshita, T. Seike, Atsushi Tokuhisa, Noriyoshi Azumi, Hiroaki Kimura, Nobuteru Nariyama, Tetsuya Ishikawa, Takahiro Sato, Teruaki Hasegawa, Hideo Kitamura, Tsumoru Shintake, Shun Ono, Toru Ohata, Yoshihiro Asano, Akihiro Yamashita, Hirokazu Maesaka, Haruhiko Ohashi, Mitsuhiro Yamaga, T. Hirono, H. Ego, Takemasa Masuda, Yuji Otake, Naoyasu Hosoda, Makina Yabashi, Tatsuyuki Sakurai, Takaki Hatsui, Yoichi Kirihara, Mitsuru Nagasono, Takashi Kameshima, Atsushi Higashiya, Hideki Takebe, Chikara Kondo, Kazuaki Togawa, Yuichi Inubushi, Akio Kiyomichi, Choji Saji, Takashi Ohshima, Katsutoshi Shirasawa, Shunji Goto, Togo Kudo, Xavier Maréchal, Takahiro Matsumoto, Toshiro Itoga, Kenichi Yanagida, Yasumasa Joti, T. Bizen, Tadashi Togashi, Hirofumi Hanaki, Kensuke Tono, Toru Hara, Chao Zhang, Takahiro Inagaki, Ryotaro Tanaka, Toru Fukui, Hideki Aoyagi, Masahiro Kago, Tomohiro Matsushita, T. Kobayashi, Takashi Tanaka, Takashi Sugimoto

Publikováno v: Nature Photonics. 6:540-544

Researchers report sub-angstrom fundamental-wavelength lasing at the SPring-8 Angstrom Compact Free-Electron Laser in Japan. The output has a maximum power of more than 10 GW, a pulse duration of 10−14 s and a lasing wavelength of 0.634 A.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::58a1fcf5391452a1c7200f5c7987128c
https://doi.org/10.1038/nphoton.2012.141