Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Katsuya Okamura"'
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 18, Iss 5, p 050101 (2015)
A novel scheme for a racetrack-shape fixed field induction accelerator (RAFFIA) capable of accelerating extremely heavy cluster ions (giant cluster ions) is described. The key feature of this scheme is rapid induction acceleration by localized induct
Externí odkaz:
https://doaj.org/article/b1636daf28344569b7c236b906049c89
Publikováno v:
Review of Scientific Instruments. 94
A switching power supply (SPS) was applied as the high-frequency bipolar high-voltage pulse source required to accelerate charged particles in the induction synchrotron, which was a novel synchrotron proposed at the High Energy Accelerator Research O
Autor:
Hidenori Kitai, Hisato Michikoshi, Kunihiro Sakamoto, Akira Tokuchi, Tatsuya Kaito, Ken Takayama, Katsuya Okamura, Daiki Kumamoto, Fujio Naito
Publikováno v:
Materials Science Forum. 1004:1141-1147
To resolve the drawback of conventional thyratron switches, development of a semiconductor high voltage switch utilizing a 13 kV class SiC-MOSFET developed by Tsukuba Power Electronics Constellations (TPEC) is proceeding. At first, the device evaluat
Autor:
T. Kawakubo, E. Kadokura, X. Liu, Toshikazu Adachi, S. Takano, M. Hirose, Takashi Yoshimoto, Katsuya Okamura, N. Munemoto, Ken Takayama
Publikováno v:
Physical Review Accelerators and Beams, Vol 24, Iss 10, p 100401 (2021)
There has been much research on longitudinal bunch splitting and coalescing for accelerator performance improvements in rf synchrotrons. In this paper, we report a scheme with several induction cells that goes beyond the limitation in which the phase
Autor:
Shigeru Murasugi, Eiichi Yanaoka, Yusuke Komatsu, Katsuya Okamura, Masahito Tomizawa, Takuro Kimura, Rotaro Muto, Yoshitsugu Arakaki, Yoshihisa Shirakabe, Akihiko Matsumura
Publikováno v:
Proceedings of the 3rd J-PARC Symposium (J-PARC2019).
Autor:
Katsushi Hasegawa, Yoshitugu Arakaki, Shuei Yamada, Masanobu Yamamoto, Kenichirou Satou, Yasuyuki Sugiyama, Katsuya Okamura, Tetsushi Shimogawa, Yoichiro Hori, Yoshinori Kurimoto, Kazuki Miura, Takeshi Toyama, Kazuhito Ohmi, Eiichi Yanaoka, Masayuki Shimamoto, Yoichi Sato, T. Koseki, Takao Oogoe, Takuro Kimura, Masashi Okada, Takeshi Nakamura, Masahito Tomizawa, Masaki Tejima, Masashi Shirakata, Aine Kobayashi, Takuya Sugimoto, Masahiko Uota, Tatsunobu Shibata, Masashi Furusawa, Fujio Naito, Masahiro Nomura, Shigeru Murasugi, Chihiro Ohmori, Yoshinori Hashimoto, Ryotaro Muto, Susumu Igarashi, Yuichi Morita, Kazuaki Niki, Yoshihiro Sato, Asato Orii, Keigo Hara, Koji Ishii, Noriyuki Matsumoto, Masahito Yoshii, Hideaki Hotchi, Fumihiko Tamura, Kenichi Sato, Norihiko Kamikubota, Taihei Shimada, Noboru Yamamoto, Kotomi Kadowaki, Jumpei Takano, Chikashi Kubota, Yoichi Takiyama
Publikováno v:
Progress of Theoretical and Experimental Physics. 2021
The J-PARC Main Ring (MR) has supplied the high-intensity proton beam for the T2K long-baseline neutrino experiment since 2010. The present beam power is 510 kW and the total number of protons on the target reaches $3.64\times10^{21}$. To observe cha
Autor:
Takuro Kimura, Yoshitugu Arakaki, Ryotaro Muto, Masahito Tomizawa, Yoshihisa Shirakabe, Eiichi Yanaoka, Hikaru Sato, Katsuya Okamura, Shigeru Murasugi
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 902:51-61
A dynamic bump under the achromatic condition has been applied for third integer slow extraction from the Japan Proton Accelerator Research Complex main ring. This dynamic bump scheme has drastically reduced beam loss rate for slow extraction compare
Autor:
Ken Takayama, Katsuya Okamura
Publikováno v:
Materials Science Forum. 897:685-688
Pulse switching characteristics of newly developed 3.3 kV SiC-MOSFET were investigated and they were provided for a prototype switching power supply (SPS). With supply voltage of 2.5 kV and the load resistor of 100 Ω, rise time Tr and fall time Tf w
Autor:
Masahito Tomizawa, Takuro Kimura, Ryotaro Muto, T. Shimogawa, Katsuya Okamura, D. Naito, Yoshinori Kurimoto
Publikováno v:
Physical Review Accelerators and Beams, Vol 22, Iss 7, p 072802 (2019)
In the main ring (MR) of the Japan Proton Accelerator Research Complex (J-PARC), the power supplies of magnets induce large ripples in the betatron tunes. The tune ripples degrade the quality of the beam spill on the slowly extracted beam. To improve
Autor:
Katsuya Okamura, Ken Takayama, Toshikazu Adachi, Yosuke Yuri, Jun Hasegawa, Kazuhiko Horioka, Kazumasa Takahashi, Tadamichi Kawakubo, Toru Sasaki, Takashi Kikuchi
Publikováno v:
Physics Letters A. 384:126692
Several heavy ion drivers for heavy ion inertial fusion have been proposed in the US and Europe, based on linear induction accelerator technology [1] and existing RF technology [2] , respectively, although they have not been realized on a large scale