Zobrazeno 1 - 10
of 72
pro vyhledávání: '"K Y Watanabe"'
Autor:
J. Varela, D. Spong, L. Garcia, Y. Ghai, J. Ortiz, FAR3d project collaborators, P. Adulsiriswad, N. Aiba, E. Ascasíbar, A. Azegami, A. Bader, M. Baruzzo, H. Betar, B. Breizman, J. Breslau, A. Cappa, W. A. Cooper, D. del-Castillo-Negrete, A. Di Siena, X. Du, L. G. Eliseev, J. Garcia, J. M. García-Regaña, N. Gorelenkov, L. Herrera, C. Hidalgo, J. Huang, M. Honda, I. Holod, K. Ida, M. Idouakass, F. Jenko, C. Jiale, Y. Kamada, Y. Kazakov, S. Kobayashi, U. Losada, S. Mazzi, A. Melnikov, B. Ph. Van Milligen, D. Monseev, M. Murakami, K. Nagaoka, K. Nagasaki, M. Ochando, J. Ongena, K. Ogawa, S. Ohdachi, M. Osakabe, D. C. Pace, F. Papousek, F. Poli, M. Podesta, P. Pons-Villalonga, M. Poradzinski, J. M. Reynolds-Barredo, R. Sanchez, R. Seki, S. Sharapov, K. Shinohara, J. Shiraishi, Z. Stancar, Y. Sun, Y. Suzuki, K. Tanaka, S. Taimourzadeh, Y. Takemura, Y. Todo, T. Tokuzawa, V. Tribaldos, M. A. Van Zeeland, F. L. Waelbroeck, X. H. Wang, K. Y. Watanabe, A. Wingen, S. Yamamoto, M. Yoshinuma, H. Yang, D. Zarzoso, Y. Zou
Publikováno v:
Frontiers in Physics, Vol 12 (2024)
The development of reduced models provide efficient methods that can be used to perform short term experimental data analysis or narrow down the parametric range of more sophisticated numerical approaches. Reduced models are derived by simplifying th
Externí odkaz:
https://doaj.org/article/b1c104b555ac44ea870b1023f6ba7daf
Publikováno v:
T. Kobayashi, M. Kobayashi, Y. Narushima, Y. Suzuki, K. Y. Watanabe, K. Mukai, and Y. Hayashi Phys. Rev. Lett. 128, 085001
A new type of self-sustained divertor oscillation is discovered in the Large Helical Device stellarator, where the peripheral plasma is detached from material diverters by means of externally applied perturbation fields. The divertor oscillation is f
Autor:
G Motojima, S Masuzaki, T Morisaki, K Y Watanabe, M Kobayashi, K Ida, R Sakamoto, M Yoshinuma, R Seki, H Nuga, T Tsujimura, C Suzuki, M Emoto, Y Tsuchibushi, T Murase, Y Takeiri
Publikováno v:
G Motojima et al 2022 Phys. Scr. 97 035601
Density control is crucial for maintaining stable confined plasma. Divertor pumping, where neutral particles are compressed and exhausted in the divertor region, was developed for this task for the Large Helical Device. In this study, neutral particl
Confinement characteristics of high-energy ions produced by ICRF heating in the large helical device
Autor:
R Kumazawa, K Saito, Y Torii, T Mutoh, T Seki, T Watari, M Osakabe, S Murakami, M Sasao, T Watanabe, T Yamamoto, T Notake, N Takeuchi, T Saida, F Shimpo, G Nomura, M Yokota, A Kato, Y Zao, H Okada, M Isobe, T Ozaki, K Narihara, Y Nagayama, S Inagaki, S Morita, A V Krasilnikov, H Idei, S Kubo, K Ohkubo, M Sato, T Shimozuma, Y Yoshimura, K Ikeda, K Nagaoka, Y Oka, Y Takeiri, K Tsumori, N Ashikawa, M Emoto, H Funaba, M Goto, K Ida, T Kobuchi, Y Liang, S Masuzaki, T Minami, J Miyazawa, T Morisaki, S Muto, Y Nakamura, H Nakanishi, K Nishimura, N Noda, S Ohdachi, B J Peterson, A Sagara, S Sakakibara, R Sakamoto, K Sato, M Shoji, H Suzuki, K Tanaka, K Toi, T Tokuzawa, K Y Watanabe, I Yamada, S Yamamoto, M Yoshinuma, M Yokoyama, K-Y Watanabe, O Kaneko, K Kawahata, A Komori, N Ohyabu, H Yamada, K Yamazaki, S Sudo, K Matsuoka, Y Hamada, O Motojima, M Fujiwara, the LHD Experimental Group
Publikováno v:
Plasma Physics and Controlled Fusion. 45:1037-1050
The behaviour of high-energy ions accelerated by an ion cyclotron range of frequency (ICRF) electric field in the large helical device (LHD) is discussed. A better confinement performance of high-energy ions in the inward-shifted magnetic axis config
Autor:
H. Yamada, K. Y. Watanabe, S. Sakakibara, Y. Suzuki, S. Ohdachi, M. Kobayashi, H. Funaba, null LHD Experiment Group
Publikováno v:
Contributions to Plasma Physics. 50:480-486
Recent experiments in LHD have demonstrated reactor-relevant high β plasmas. The high beta state with the volume averaged beta of 5 % has been maintained for longer than 100 times the energy confinement time without any disastrous instability. Accum
Publikováno v:
Contributions to Plasma Physics. 50:620-623
The design of a core plasma with the LHD-type heliotron configuration has been advanced. Recent design study of a LHD-type heliotron reactor has shown that the increase in the reactor size is a possible solution to secure a sufficient blanket space.
Autor:
Y. Narushima, F. Castejón, K. Y. Watanabe, S. Sakakibara, T. Estrada, F. Medina, D. López-Bruna, M. Yokoyama, K. Ida, null LHD Experiment Group
Publikováno v:
Contributions to Plasma Physics. 50:529-533
The effect of the poloidal flow on the magnetic island is studied. The self-healing of the magnetic island has been observed in the Large Helical Device (LHD) and TJ-II. In TJ-II plasmas, the magnetic island is healed in case the radial electric fiel
Publikováno v:
Contributions to Plasma Physics. 48:480-484
A phenomenological probe model was developed for quantitative fast-ion-measurement using a hybrid directional probe (HDP), which is a directional probe to measure ion current and heat flux at the same position. The secondary electrons due to fast-ion
Autor:
Ulrich Stroth, Roland Preuss, S. Okamura, M. Yokoyama, Joseph Talmadge, A. Werner, Hiroshi Yamada, A. Kus, F. Sano, Yu. Turkin, Victor Tribaldos, K. Y. Watanabe, H. Funaba, H. Maaßberg, J. H. Harris, Yasuhiro Suzuki, E. Ascasibar, C. D. Beidler, Andreas Dinklage, Sadayoshi Murakami, A. Weller
Publikováno v:
Nuclear Fusion. 47:1265-1273
The International Stellarator Confinement Database (ISCDB) is a joint effort of the helical device community. It is publicly available at http://www.ipp.mpg.de/ISS and http://iscdb.nifs.ac.jp. The validity of physics models is investigated employing
Autor:
K Y Watanabe, Y Suzuki, T Yamaguchi, K Narihara, K Tanaka, T Tokuzawa, I Yamada, S Sakakibara, Y Narushima, T Morisaki, N Nakajima, H Yamada, K Kawahata, the LHD Experimental Group
Publikováno v:
Plasma Physics and Controlled Fusion. 49:605-618
We analyse the change of plasma boundaries due to changes in beta in large helical device plasmas based on electron temperature and density profile measurements, and compare the change with the prediction by a MHD equilibrium code without a priori as