Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Kurita, Keisuke; Sakai, Takuro; Suzui, Nobuo*; Yin, Y.-G.*; Sugita, Ryohei*; Kobayashi, Natsuko*; Tanoi, Keitaro*; Kawachi, Naoki*
Japanese Journal of Applied Physics, 60(11), p.116501_1 - 116501_4, 2021/11
Times Cited Count：1 Percentile：39.19(Physics, Applied)Radioisotope tracer imaging is useful for studying plant physiological phenomena. In this study, we developed an autoradiography system with phosphor powder (ZnS:Ag), "Live-autoradiography", for imaging radioisotope dynamics in a living plant. This system visualizes the element migration and accumulation in intact plants continuously under a light environment. An imaging test was performed on point sources of 
Cs, with a radioactivity of 10-100 kBq of being observed; this indicates satisfactory system linearity between the image intensity and the radioactivity of Cs. Moreover, dynamics imaging of Cs was performed on an intact soybean plant for four days. The serial images indicated Cs accumulation in the node, vein, and growing point of the plant. The developed system can be used for studying plant physiological phenomena and can be employed for quantitative measurement of radionuclides.
Kurita, Keisuke; Miyoshi, Yuta*; Nagao, Yuto*; Yamaguchi, Mitsutaka*; Suzui, Nobuo*; Yin, Y.-G.*; Ishii, Satomi*; Kawachi, Naoki*; Hidaka, Kota*; Yoshida, Eiji*; et al.
QST-M-29; QST Takasaki Annual Report 2019, P. 106, 2021/03
Kurita, Keisuke; Iikura, Hiroshi
Hamon, 31(1), p.11 - 13, 2021/02
no abstracts in English
Sasa, Kimikazu*; Honda, Maki; Hosoya, Seiji*; Takahashi, Tsutomu*; Takano, Kenta*; Ochiai, Yuta*; Sakaguchi, Aya*; Kurita, Saori*; Satou, Yukihiko; Sueki, Keisuke*
Journal of Nuclear Science and Technology, 58(1), p.72 - 79, 2021/01
Times Cited Count：3 Percentile：59.68(Nuclear Science & Technology)
Cs tracerSuzui, Nobuo*; Shibata, Takuya; Yin, Y.-G.*; Funaki, Yoshihito*; Kurita, Keisuke; Hoshina, Hiroyuki*; Yamaguchi, Mitsutaka*; Fujimaki, Shu*; Seko, Noriaki*; Watabe, Hiroshi*; et al.
Scientific Reports (Internet), 10, p.16155_1 - 16155_9, 2020/10
Times Cited Count：0 Percentile：0.01(Multidisciplinary Sciences)Kataoka, Ryuho*; Nishiyama, Takanori*; Tanaka, Yoshimasa*; Kadokura, Akira*; Uchida, Herbert Akihito*; Ebihara, Yusuke*; Ejiri, Mitsumu*; Tomikawa, Yoshihiro*; Tsutsumi, Masaki*; Sato, Kaoru*; et al.
Earth, Planets and Space (Internet), 71, p.9_1 - 9_10, 2019/01
Times Cited Count：7 Percentile：48.49(Geosciences, Multidisciplinary)Transient ionization of the mesosphere was detected at around 65 km altitude during the isolated auroral expansion occurred at 2221-2226 UT on June 30, 2017. A general-purpose Monte Carlo particle transport code PHITS suggested that significant ionization is possible in the middle atmosphere due to auroral X-rays from the auroral electrons of 
10 keV.
Nagashima, Keisuke; Kikuchi, Mitsuru; Kurita, Genichi; Ozeki, Takahisa; Aoyagi, Tetsuo; Ushigusa, Kenkichi; Neyatani, Yuzuru; Kubo, Hirotaka; Mori, Kensuke*; Nakagawa, Shoji*; et al.
Fusion Engineering and Design, 36(2-3), p.325 - 342, 1997/05
Times Cited Count：1 Percentile：14.87(Nuclear Science & Technology)no abstracts in English
Kurita, Genichi; Aiba, Nobuyuki; Tobita, Kenji; Nishio, Satoshi; Nagashima, Keisuke
no journal, ,
We obtain the critical beta for the up-down symmetric double-null equilibria against the position of conformal conducting wall in two cases; one is fixed plasma current profile case and another is varied plasma current profile case taking a bootstrap current into account. To obtain normalized beta value, bN=4.3, assumed in Slim-CS tokamak, we must put the conducting wall at r=1.2a and r=1.34a, where a is the plasma minor radius, for former and latter cases, respectively. The advantage of latter case comes from the higher minimum safety factor value due to larger plasma bootstrap current derived by the increased plasma pressure. If we consider the effect of edge pedestal plasma pressure, the critical beta can be increased. In this study, only the n=1 mode, which is considered to be most dangerous one, is investigated.
Kurita, Genichi; Tobita, Kenji; Asakura, Nobuyuki; Aiba, Nobuyuki; Nagashima, Keisuke
no journal, ,
It is necessary to obtain the stable high beta plasma in order to realize the economically superior magnetically confined fusion reactor. In these analyses, we mainly investigate the effect of plasma pressure pedestal near plasma edge region considering the bootstrap current effect due to edge plasma pressure pedestal. The following results are obtained. Increase of edge plasma pressure induces a rise of critical beta because of reduction of internal plasma pressure gradient, until the edge plasma pressure gradient and bootstrap current induces the new instability near the plasma edge. For comparatively peaked plasma pressure profiles, we have another higher door-knob like stable region near the maximum critical beta region.
Fujimaki, Shu; Kawachi, Naoki; Suzui, Nobuo; Ishii, Satomi; Yin, Y.-G.; Kurita, Keisuke
no journal, ,
no abstracts in English
Suzui, Nobuo; Yin, Y.-G.; Ishii, Satomi; Kurita, Keisuke; Kawachi, Naoki; Fujimaki, Shu
no journal, ,
no abstracts in English
concentration environmentIshii, Yohei*; Suzui, Nobuo; Kawachi, Naoki; Yin, Y.-G.; Ishii, Satomi; Kurita, Keisuke; Fujimaki, Shu; Kusano, Hiroaki*; Shimada, Hiroaki*
no journal, ,
no abstracts in English
Kawachi, Naoki; Suzui, Nobuo; Ishii, Satomi; Yin, Y.-G.; Kurita, Keisuke; Ishii, Yohei*; Shimada, Hiroaki*; Fujimaki, Shu
no journal, ,
no abstracts in English
Yin, Y.-G.; Suzui, Nobuo; Kawachi, Naoki; Ishii, Satomi; Kurita, Keisuke; Nakamura, Takuji*; Shinano, Takuro*; Fujimaki, Shu
no journal, ,
no abstracts in English
Kurita, Keisuke; Kawachi, Naoki; Yin, Y.-G.; Suzui, Nobuo; Ishii, Satomi; Watabe, Hiroshi*; Yamamoto, Seiichi*; Fujimaki, Shu
no journal, ,
no abstracts in English
Kurita, Keisuke; Kawachi, Naoki; Yin, Y.-G.; Suzui, Nobuo; Ishii, Satomi; Watabe, Hiroshi*; Yamamoto, Seiichi*; Fujimaki, Shu
no journal, ,
no abstracts in English
Kurita, Keisuke; Kawachi, Naoki; Yin, Y.-G.; Suzui, Nobuo; Ishii, Satomi; Watabe, Hiroshi*; Yamamoto, Seiichi*; Fujimaki, Shu
no journal, ,
no abstracts in English
Yin, Y.-G.; Suzui, Nobuo; Kawachi, Naoki; Ishii, Satomi; Kurita, Keisuke; Nakamura, Takuji*; Shinano, Takuro*; Fujimaki, Shu
no journal, ,
no abstracts in English
Kurita, Keisuke; Kawachi, Naoki; Yin, Y.-G.; Suzui, Nobuo; Ishii, Satomi; Watabe, Hiroshi*; Yamamoto, Seiichi*; Fujimaki, Shu
no journal, ,
no abstracts in English
Kurita, Keisuke; Kawachi, Naoki; Yin, Y.-G.; Suzui, Nobuo; Ishii, Satomi; Watabe, Hiroshi*; Yamamoto, Seiichi*; Fujimaki, Shu
no journal, ,
no abstracts in English
