Zobrazeno 1 - 10
of 592
pro vyhledávání: '"M., Yoshinuma"'
Publikováno v:
Earth, Planets and Space, Vol 76, Iss 1, Pp 1-16 (2024)
Abstract The hyperspectral camera for auroral imaging (HySCAI), which can provide a two-dimensional (2D) aurora image with full spectrum, was developed to study auroral physics. HySCAI consists of an all-sky lens, monitor camera, galvanometer scanner
Externí odkaz:
https://doaj.org/article/ba2c0126c1e34ef8bc67aa41ea14908f
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
Autor:
H. Zhou, Y. Xu, M. Kobayashi, A. Shimizu, R. Seki, K. Tanaka, T. Tokuzawa, M. Yoshinuma, Y. Takemura, H. Takahashi, K. Ogawa, J. Cheng, W. Li, D.N. Wu, Y.J. Zhu, Y. Luo, Y.C. Li, J. Huang, X.Q. Wang, H.F. Liu, H. Liu, X. Zhang
Publikováno v:
Nuclear Fusion, Vol 64, Iss 3, p 036023 (2024)
Isotope effects have been investigated in Neutral Beam Injection (NBI) heated plasmas on the Large Helical Device with similar operational parameters between Hydrogen (H) and Deuterium (D) plasmas. Experimental results show that the global energy con
Externí odkaz:
https://doaj.org/article/50a23d87225142529bfd351c7c05818e
Degradation of fast-ion confinement depending on the neutral beam power in MHD quiescent LHD plasmas
Autor:
H. Nuga, R. Seki, K. Ogawa, H. Yamaguchi, S. Kamio, Y. Fujiwara, Y. Kawamoto, M. Yoshinuma, T. Kobayashi, Y. Takemura, M. Isobe, M. Osakabe, M. Yokoyama
Publikováno v:
Nuclear Fusion, Vol 64, Iss 6, p 066001 (2024)
We investigated the degradation of neutral beam (NB) fast-ion confinement depending on the NB power without magnetohydrodynamics instabilities in the Large Helical Device (LHD). In the LHD deuterium experiment, the neutron emission rate per NB power
Externí odkaz:
https://doaj.org/article/32751dd07d204fbea54ad72dc1715cb2
Autor:
K. Ida, M. Yoshinuma, M. Kobayashi, T. Kobayashi, N. Kenmochi, F. Nespoli, R.M. Magee, F. Warmer, A. Dinklage, A. Matsuyama, R. Sakamoto, T. Nasu, T. Tokuzawa, T. Kinoshita, K. Tanaka, N. Tamura, K. Nagaoka, M. Nishiura, Y. Takemura, K. Ogawa, G. Motojima, T. Oishi, Y. Morishita, J. Varela, W.H.J. Hayashi, M. Markl, H. Bouvain, Y. Liang, M. Leconte, D. Moseev, V.E. Moiseenko, C.G. Albert, I. Allfrey, A. Alonso, F.J. Arellano, N. Ashikawa, A. Azegami, L. Bardoczi, M. van Berkel, M. Beurskens, M.W. Binderbaue, A. Bortolon, S. Brezinsek, R. Bussiahn, A. Cappa, D. Carralero, I.C. Chan, J. Cheng, X. Dai, D.J. Den Hartog, C.P. Dhard, F. Ding, A. Ejiri, S. Ertmer, T. Fornal, K. Fujita, Y. Fujiwara, H. Funaba, L. Garcia, J.M. Garcia-Regana, I. Garcia-Cortés, I.E. Garkusha, D.A. Gates, Y. Ghai, E.P. Gilson, H. Gota, M. Goto, E.M. Green, V. Haak, S. Hamaguchi, K. Hanada, H. Hara, D. Hartmann, Y. Hayashi, T. Henning, C. Hidalgo, J. Hillairet, R. Hutton, T. Ido, H. Igami, K. Ikeda, S. Inagaki, A. Ishizawa, S. Ito, M. Isobe, Y. Isobe, M. Ivkovic, Z. Jiang, J. Jo, S. Kamio, H. Kasahara, D. Kato, Y. Katoh, Y. Kawachi, Y. Kawamoto, G. Kawamura, T. Kawate, Ye.O. Kazakov, V. Klumper, A. Knieps, W.H. Ko, S. Kobayashi, F. Koike, Yu.V. Kovtun, M. Kubkowska, S. Kubo, S.S.H. Lam, A. Langenberg, H. Laqua, S. Lazerson, J. Lestz, B. Li, L. Liao, Z. Lin, R. Lunsford, S. Masuzaki, H. Matsuura, K.J. McCarthy, D. Medina-Roque, O. Mitarai, A. Mollen, C. Moon, Y. Mori, T. Morisaki, S. Morita, K. Mukai, I. Murakami, S. Murakami, T. Murase, C.M. Muscatello, K. Nagasaki, D. Naujoks, H. Nakano, M. Nakata, Y. Narushima, A. Nagy, J.H. Nicolau, T. Nishizawa, S. Nishimoto, H. Nuga, M. Nunami, R. Ochoukov, S. Ohdachi, J. Ongena, M. Osakabe, N.A. Pablant, N. Panadero, B. Peterson, J. de la Riva Villén, J. Romazanov, J. Rosato, M. Rud, S. Sakakibara, H.A. Sakaue, H. Sakai, I. Sakon, M. Salewski, S. Sangaroon, S. Sereda, T. Stange, K. Saito, S. Satake, R. Seki, T. Seki, S. Sharapov, A. Shimizu, T. Shimozuma, G. Shivam, M. Shoji, D.A. Spong, H. Sugama, Z. Sun, C. Suzuki, Y. Suzuki, T. Tajima, E. Takada, H. Takahashi, K. Toi, Y. Tsuchibushi, N. Tsujii, K. Tsumori, T.I. Tsujimurai, G. Ueno, H. Uehara, J.L. Velasco, E. Wang, K.Y. Watanabe, T. Wauter, U. Wenzel, M. Yajima, H. Yamada, I. Yamada, K. Yanagihara, H. Yamaguchi, R. Yanai, R. Yasuhara, M. Yokoyama, Y. Yoshimura, M. Zarnstorff, M. Zhao, G.Q. Zhong, Q. Zhou, S. Ziaei, LHD Experiment Group, the W7-X Team
Publikováno v:
Nuclear Fusion, Vol 64, Iss 11, p 112009 (2024)
Recently, experiments on basic plasma physics issues for solving future problems in fusion energy have been performed on a Large Helical Device. There are several problems to be solved in future devices for fusion energy. Emerging issues in burning p
Externí odkaz:
https://doaj.org/article/493f2d046d6648a2b22107c6dc09b6c1
Autor:
D. Moseev, M. Zanini, H. Kasahara, H.P. Laqua, H. Funaba, W.H.J. Hayashi, W. Heidbrink, K. Ida, H. Igami, Y. Kawamoto, N. Kenmochi, S.A. Lazerson, M. Nishiura, R. Ochoukov, K. Ogawa, M. Rud, M. Salewski, T. Seki, N. Tamura, K. Tanaka, T. Tokuzawa, M. Yoshinuma
Publikováno v:
Nuclear Fusion, Vol 64, Iss 6, p 066028 (2024)
Sawtooth oscillations in tokamaks frequently lead to the redistribution of energetic ions, mainly on passing orbits, causing their expulsion from the core. This paper discusses the first measurements of the interaction of fast ions and sawteeth in th
Externí odkaz:
https://doaj.org/article/5b15320e9d834f2d9d7a23bf7d1a6bd3
Autor:
T. Nasu, T. Tokuzawa, M. Nakata, K. Ida, S. Inagaki, M. Nishiura, Y. Yoshimura, R. Yanai, K. Tanaka, M. Yoshinuma, T. Kobayashi, A. Ejiri, K.Y. Watanabe, I. Yamada, LHD Experiment Group
Publikováno v:
Nuclear Fusion, Vol 64, Iss 9, p 096008 (2024)
Electron-scale turbulence, whose wavelength is the electron Larmor radius, is thought to have the potential to cause stiffness in an electron temperature gradient and degrade the confinement of future burning plasma in which the electron heating by a
Externí odkaz:
https://doaj.org/article/0e8f3f9f422b46048b5d0d18275c4d85
Autor:
N. Kenmochi, K. Ida, T. Tokuzawa, R. Yasuhara, H. Funaba, H. Uehara, D. J. Den Hartog, I. Yamada, M. Yoshinuma, Y. Takemura, H. Igami
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-9 (2022)
Abstract The preceding propagation of turbulence pulses has been observed for the first time in heat avalanche events during the collapse of the electron internal transport barrier (e-ITB) in the Large Helical Device. The turbulence and heat pulses a
Externí odkaz:
https://doaj.org/article/e4fb845f0b06446981d21e8861f28f89
Autor:
F. Nespoli, K. Tanaka, S. Masuzaki, N. Ashikawa, M. Shoji, E.P. Gilson, R. Lunsford, T. Oishi, K. Ida, M. Yoshinuma, Y. Takemura, T. Kinoshita, G. Motojima, M. Osakabe, N. Kenmochi, G. Kawamura, C. Suzuki, A. Nagy, A. Bortolon, N.A. Pablant, A. Mollen, N. Tamura, D.A. Gates, T. Morisaki
Publikováno v:
Nuclear Fusion, Vol 63, Iss 7, p 076001 (2023)
Recently an improved confinement regime, characterized by reduced turbulent fluctuations has been observed in the Large Helical Device upon the injection of boron powder into the plasma (Nespoli et al 2022 Nat. Phys. 18 350–56). In this article, we
Externí odkaz:
https://doaj.org/article/0ff1aa5364f644e78031940c8e681e51
Autor:
F. Nespoli, N. Ashikawa, E.P. Gilson, R. Lunsford, S. Masuzaki, M. Shoji, T. Oishi, C. Suzuki, A. Nagy, A. Mollen, N.A. Pablant, K. Ida, M. Yoshinuma, N. Tamura, D.A. Gates, T. Morisaki
Publikováno v:
Nuclear Materials and Energy, Vol 25, Iss , Pp 100842- (2020)
Injection of impurities in the form of sub-millimeter powder grains is performed for the first time in the Large Helical Device (LHD) plasma, employing the Impurity Powder Dropper (IPD) (Nagy et al., 2018), developed and built by PPPL. Controlled amo
Externí odkaz:
https://doaj.org/article/ee2588ae5f6c485d9715618c7a178d27