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Author(s):
S. Murakami, H. Yamada, A. Wakasa, M. Sasao, M. Isobe, T. Ozaki, P. Goncharov, T. Saida, J. F. Lyon, M. Osakabe, K. Narihara, K. Tanaka, H. Inagaki, S. Morita, K. Ida, J. Miyazawa, H. Idei, K. Ikeda, S. Kubo, R. Kumazawa, T. Mutoh, Y. Oka, K. Saito, T. Seki, Y. Takeiri, Y. Torii, K. Tumori, T. Watari, K. Y. Watanabe, H. Funaba, M. Yokoyama, H. Maassberg, C. D. Beidler, K. Itoh, O. Kaneko, A. Komori, T. Akiyama1, N. Ashikawa, M. Emoto, M. Goto, K. Kawahata, H. Kawazome, K. Khlopenkov, T. Kobuchi, A. Kostrioukov, Y. Liang, S. Masuzaki, T. Minami, T. Morisaki, S. Muto, Y. Nagayama, Y. Nakamura, H. Nakanishi, Y. Narushima, K. Nishimura, N. Noda, T. Notake, H. Nozato, S. Ohdachi, N. Ohyabu, B. J. Peterson, A. Sagara, S. Sakakibara, R. Sakamoto, K. Sato, M. Sato, T. Shimozuma, M. Shoji, H. Suzuki, N. Takeuchi, N. Tamura, K. Toi, T. Tokuzawa, Y. Xu, I. Yamada, S. Yamamoto, T. Yamamoto, Y. Yoshimura, M. Yoshinuma, M. Tanaka, S. Okamura, S. Yoshimura, K. Nagaoka, T. Satow, S. Imagawa, T. Mito, I. Ohtake, T. Uda, K. Ohkubo, S. Sudo, K. Yamazaki, K. Matsuoka, O. Motojima, Y. Hamada and M. Fujiwara
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Title:
A Demonstration of Magnetic Field Optimization in LHD
Date of publication:
Oct. 2002
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Key words:
IAEA, fusion energy conference, Lyon
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Abstract:
An optimized configuration of the neoclassical transport and the energetic particle confinement to a level typical of so-called "advanced stellarators" is found by shifting the magnetic axis position in LHD. Electron heat transport and NBI beam ion deistribution are investigated in low-collisionality LHD plasma in order to study the magnetic field optimization effect on the thermal plasma transport and the energetic particle confinement. A higher electron temperature is obtained in the optimized configuration, and the transport analysis suggests a considerable effect of neoclassical transport on the electron heat transport assuming the ion-root level of radial electric field. Also a higher energetic ion distribution of NBI beam ions is observed showing the improvement of the energetic particle confinement. These obtained results support a future reactor design by magnetic field optimization in a non-axisymmetric configuration.
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