A. Morioka
Japan Atomic Energy Research Institute
30 Papers
162 Citations
A. Morioka is an academic researcher from Japan Atomic Energy Research Institute. The author has contributed to research in topics: Neutron & Neutral particle. The author has an hindex of 13, co-authored 30 publications.
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Papers
Alfvén eigenmode and energetic particle research in JT-60U
H. Kimura,Y. Kusama,Mikio Saigusa,G. J. Kramer,Kenji Tobita,M. Nemoto,Takashi Kondoh,Takeo Nishitani,O. Da Costa,T. Ozeki,T. Oikawa,S. Moriyama,A. Morioka,Guoyong Fu,Chio-Zong Cheng,V. I. Afanas'ev +15 more
TL;DR: In this article, the toroidicity induced Alfven eigenmodes (TAEs) were stable in negative shear discharges with a large density gradient at the internal transport barrier (ITB).
157
First measurement of neutron emission profile on JT-60U using Stilbene neutron detector with neutron-gamma discrimination
M. Ishikawa,Takeo Nishitani,A. Morioka,Manabu Takechi,K. Shinohara,M. Shimada,Y. Miura,Masayuki Nagami,Yu. A. Kaschuck +8 more
TL;DR: In this article, the Stilbene detector was installed on the JT-60U Tokamak to measure the neutron emission profile for the first time, and the results showed good gamma suppression.
56
Reactor relevant current drive and heating by N-NBI on JT-60U
T. Oikawa,Yutaka Kamada,Akihiko Isayama,Takaaki Fujita,T. Suzuki,Naotaka Umeda,Mikito Kawai,Masaaki Kuriyama,Larry R. Grisham,Y. Ikeda,K. Kajiwara,Kenkichi Ushigusa,Kenji Tobita,A. Morioka,Manabu Takechi,T. Itoh,Jt Team +16 more
TL;DR: In this article, the current drive capability of negative ion based neutral beam injection (N-NBI) in JT-60U was extended to the reactor relevant regime, and the N-NB driven current reached 1 MA with an injection power of 3.75 MW at a beam energy of 360 keV.
Neutral particle analysis in MeV energy range and relative role of and ions in fast proton neutralization in ICRF and combined ICRF/NBI-heated JT-60U plasmas
V I Afanassiev,Y. Kusama,M. Nemoto,Takashi Kondoh,S Ya Petrov,S.S Kozlovskij,M Satoh,A. Morioka,Y. Tsukahara,Takeo Nishitani,Haruyuki Kimura,Kiyotaka Hamamatsu,S. Moriyama,M. Saigusa,T. Fujii +14 more
TL;DR: In this paper, a neutral particle analyser of MeV energy range has been used to measure atomic hydrogen fluxes in ICRF and NBI-heated JT-60U plasmas, and a simplified model based on analysis of the steadystate ion balance equation system is applied to estimate and target densities.
24
Evaluation of radiation shielding, nuclear heating and dose rate for JT-60 superconducting modification
A. Morioka,Akira Sakasai,Kei Masaki,S. Ishida,Naoyuki Miya,Makoto Matsukawa,A. Kaminaga,A. Oikawa +7 more
TL;DR: The double-walled structure of a vacuum vessel was adopted so that the maximum nuclear heating at the inboard side of the superconducting TF coil could be suppressed to be lower than 2.5 mW/cm3 as mentioned in this paper.
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