Ion and electron heating in ICRF heating experiments on LHD

K. Saito, R. Kumazawa, T. Mutoh, T. Seki, T. Watari, Y. Torii, D. A. Hartmann, Y. Zhao, A. Fukuyama, F. Shimpo, G. Nomura, M. Yokota, M. Sasao, M. Isobe, M. Osakabe, T. Ozaki, K. Narihara, Y. Nagayama, S. Inagaki, K. ItohS. Morita, A. V. Krasilnikov, K. Ohkubo, M. Sato, S. Kubo, T. Shimozuma, H. Idei, Y. Yoshimura, O. Kaneko, Y. Takeiri, Y. Oka, K. Tsumori, K. Ikeda, A. Komori, H. Yamada, H. Funaba, K. Y. Watanabe, S. Sakakibara, M. Shoji, R. Sakamoto, J. Miyazawa, K. Tanaka, B. J. Peterson, N. Ashikawa, S. Murakami, T. Minami, S. Ohdachi, S. Yamamoto, S. Kado, H. Sasao, H. Suzuki, K. Kawahata, P. De Vries, M. Emoto, H. Nakanishi, T. Kobuchi, N. Inoue, N. Ohyabu, Y. Nakamura, S. Masuzaki, S. Muto, K. Sato, T. Morisaki, M. Yokoyama, T. Watanabe, M. Goto, I. Yamada, K. Ida, T. Tokuzawa, N. Noda, S. Yamaguchi, K. Akaishi, A. Sagara, K. Toi, K. Nishimura, K. Yamazaki, S. Sudo, Y. Hamada, O. Motojima, M. Fujiwara

Research output: Contribution to journalArticle

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Abstract

The ICRF heating experiments conducted in 1999 in the third experimental campaign on LHD are reported, with an emphasis on the optimization of the heating regime. Specifically. an exhaustive study of seven different heating regimes was carried out by changing the radiofrequency relative to the magnetic field intensity, and the dependence of the heating efficiency on H minority concentration was investigated. It was found in the experiment that both ion and electron heating are attainable with the same experimental set-up by properly choosing the frequency relative to the magnetic field intensity. In the cases of both electron heating and ion heating, the power absorption efficiency depends on the minority ion concentration. An optimum minority concentration exists in the ion heating case while, in the electron heating case, the efficiency increases with concentration monotonically. A simple model calculation is introduced to provide a heuristic understanding of these experimental results. Among the heating regimes examined in this experiment, one of the ion heating regimes was finally chosen as the optimized heating regime and various high performance discharges were realized with it.

Original languageEnglish
Pages (from-to)1021-1035
Number of pages15
JournalNuclear Fusion
Volume41
Issue number8
DOIs
Publication statusPublished - Aug 1 2001

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heating
ions
electrons
minorities
magnetic flux
ion concentration
optimization

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Cite this

Saito, K., Kumazawa, R., Mutoh, T., Seki, T., Watari, T., Torii, Y., ... Fujiwara, M. (2001). Ion and electron heating in ICRF heating experiments on LHD. Nuclear Fusion, 41(8), 1021-1035. https://doi.org/10.1088/0029-5515/41/8/306

Ion and electron heating in ICRF heating experiments on LHD. / Saito, K.; Kumazawa, R.; Mutoh, T.; Seki, T.; Watari, T.; Torii, Y.; Hartmann, D. A.; Zhao, Y.; Fukuyama, A.; Shimpo, F.; Nomura, G.; Yokota, M.; Sasao, M.; Isobe, M.; Osakabe, M.; Ozaki, T.; Narihara, K.; Nagayama, Y.; Inagaki, S.; Itoh, K.; Morita, S.; Krasilnikov, A. V.; Ohkubo, K.; Sato, M.; Kubo, S.; Shimozuma, T.; Idei, H.; Yoshimura, Y.; Kaneko, O.; Takeiri, Y.; Oka, Y.; Tsumori, K.; Ikeda, K.; Komori, A.; Yamada, H.; Funaba, H.; Watanabe, K. Y.; Sakakibara, S.; Shoji, M.; Sakamoto, R.; Miyazawa, J.; Tanaka, K.; Peterson, B. J.; Ashikawa, N.; Murakami, S.; Minami, T.; Ohdachi, S.; Yamamoto, S.; Kado, S.; Sasao, H.; Suzuki, H.; Kawahata, K.; De Vries, P.; Emoto, M.; Nakanishi, H.; Kobuchi, T.; Inoue, N.; Ohyabu, N.; Nakamura, Y.; Masuzaki, S.; Muto, S.; Sato, K.; Morisaki, T.; Yokoyama, M.; Watanabe, T.; Goto, M.; Yamada, I.; Ida, K.; Tokuzawa, T.; Noda, N.; Yamaguchi, S.; Akaishi, K.; Sagara, A.; Toi, K.; Nishimura, K.; Yamazaki, K.; Sudo, S.; Hamada, Y.; Motojima, O.; Fujiwara, M.

In: Nuclear Fusion, Vol. 41, No. 8, 01.08.2001, p. 1021-1035.

Research output: Contribution to journalArticle

Saito, K, Kumazawa, R, Mutoh, T, Seki, T, Watari, T, Torii, Y, Hartmann, DA, Zhao, Y, Fukuyama, A, Shimpo, F, Nomura, G, Yokota, M, Sasao, M, Isobe, M, Osakabe, M, Ozaki, T, Narihara, K, Nagayama, Y, Inagaki, S, Itoh, K, Morita, S, Krasilnikov, AV, Ohkubo, K, Sato, M, Kubo, S, Shimozuma, T, Idei, H, Yoshimura, Y, Kaneko, O, Takeiri, Y, Oka, Y, Tsumori, K, Ikeda, K, Komori, A, Yamada, H, Funaba, H, Watanabe, KY, Sakakibara, S, Shoji, M, Sakamoto, R, Miyazawa, J, Tanaka, K, Peterson, BJ, Ashikawa, N, Murakami, S, Minami, T, Ohdachi, S, Yamamoto, S, Kado, S, Sasao, H, Suzuki, H, Kawahata, K, De Vries, P, Emoto, M, Nakanishi, H, Kobuchi, T, Inoue, N, Ohyabu, N, Nakamura, Y, Masuzaki, S, Muto, S, Sato, K, Morisaki, T, Yokoyama, M, Watanabe, T, Goto, M, Yamada, I, Ida, K, Tokuzawa, T, Noda, N, Yamaguchi, S, Akaishi, K, Sagara, A, Toi, K, Nishimura, K, Yamazaki, K, Sudo, S, Hamada, Y, Motojima, O & Fujiwara, M 2001, 'Ion and electron heating in ICRF heating experiments on LHD', Nuclear Fusion, vol. 41, no. 8, pp. 1021-1035. https://doi.org/10.1088/0029-5515/41/8/306
Saito K, Kumazawa R, Mutoh T, Seki T, Watari T, Torii Y et al. Ion and electron heating in ICRF heating experiments on LHD. Nuclear Fusion. 2001 Aug 1;41(8):1021-1035. https://doi.org/10.1088/0029-5515/41/8/306
Saito, K. ; Kumazawa, R. ; Mutoh, T. ; Seki, T. ; Watari, T. ; Torii, Y. ; Hartmann, D. A. ; Zhao, Y. ; Fukuyama, A. ; Shimpo, F. ; Nomura, G. ; Yokota, M. ; Sasao, M. ; Isobe, M. ; Osakabe, M. ; Ozaki, T. ; Narihara, K. ; Nagayama, Y. ; Inagaki, S. ; Itoh, K. ; Morita, S. ; Krasilnikov, A. V. ; Ohkubo, K. ; Sato, M. ; Kubo, S. ; Shimozuma, T. ; Idei, H. ; Yoshimura, Y. ; Kaneko, O. ; Takeiri, Y. ; Oka, Y. ; Tsumori, K. ; Ikeda, K. ; Komori, A. ; Yamada, H. ; Funaba, H. ; Watanabe, K. Y. ; Sakakibara, S. ; Shoji, M. ; Sakamoto, R. ; Miyazawa, J. ; Tanaka, K. ; Peterson, B. J. ; Ashikawa, N. ; Murakami, S. ; Minami, T. ; Ohdachi, S. ; Yamamoto, S. ; Kado, S. ; Sasao, H. ; Suzuki, H. ; Kawahata, K. ; De Vries, P. ; Emoto, M. ; Nakanishi, H. ; Kobuchi, T. ; Inoue, N. ; Ohyabu, N. ; Nakamura, Y. ; Masuzaki, S. ; Muto, S. ; Sato, K. ; Morisaki, T. ; Yokoyama, M. ; Watanabe, T. ; Goto, M. ; Yamada, I. ; Ida, K. ; Tokuzawa, T. ; Noda, N. ; Yamaguchi, S. ; Akaishi, K. ; Sagara, A. ; Toi, K. ; Nishimura, K. ; Yamazaki, K. ; Sudo, S. ; Hamada, Y. ; Motojima, O. ; Fujiwara, M. / Ion and electron heating in ICRF heating experiments on LHD. In: Nuclear Fusion. 2001 ; Vol. 41, No. 8. pp. 1021-1035.
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abstract = "The ICRF heating experiments conducted in 1999 in the third experimental campaign on LHD are reported, with an emphasis on the optimization of the heating regime. Specifically. an exhaustive study of seven different heating regimes was carried out by changing the radiofrequency relative to the magnetic field intensity, and the dependence of the heating efficiency on H minority concentration was investigated. It was found in the experiment that both ion and electron heating are attainable with the same experimental set-up by properly choosing the frequency relative to the magnetic field intensity. In the cases of both electron heating and ion heating, the power absorption efficiency depends on the minority ion concentration. An optimum minority concentration exists in the ion heating case while, in the electron heating case, the efficiency increases with concentration monotonically. A simple model calculation is introduced to provide a heuristic understanding of these experimental results. Among the heating regimes examined in this experiment, one of the ion heating regimes was finally chosen as the optimized heating regime and various high performance discharges were realized with it.",
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T1 - Ion and electron heating in ICRF heating experiments on LHD

AU - Saito, K.

AU - Kumazawa, R.

AU - Mutoh, T.

AU - Seki, T.

AU - Watari, T.

AU - Torii, Y.

AU - Hartmann, D. A.

AU - Zhao, Y.

AU - Fukuyama, A.

AU - Shimpo, F.

AU - Nomura, G.

AU - Yokota, M.

AU - Sasao, M.

AU - Isobe, M.

AU - Osakabe, M.

AU - Ozaki, T.

AU - Narihara, K.

AU - Nagayama, Y.

AU - Inagaki, S.

AU - Itoh, K.

AU - Morita, S.

AU - Krasilnikov, A. V.

AU - Ohkubo, K.

AU - Sato, M.

AU - Kubo, S.

AU - Shimozuma, T.

AU - Idei, H.

AU - Yoshimura, Y.

AU - Kaneko, O.

AU - Takeiri, Y.

AU - Oka, Y.

AU - Tsumori, K.

AU - Ikeda, K.

AU - Komori, A.

AU - Yamada, H.

AU - Funaba, H.

AU - Watanabe, K. Y.

AU - Sakakibara, S.

AU - Shoji, M.

AU - Sakamoto, R.

AU - Miyazawa, J.

AU - Tanaka, K.

AU - Peterson, B. J.

AU - Ashikawa, N.

AU - Murakami, S.

AU - Minami, T.

AU - Ohdachi, S.

AU - Yamamoto, S.

AU - Kado, S.

AU - Sasao, H.

AU - Suzuki, H.

AU - Kawahata, K.

AU - De Vries, P.

AU - Emoto, M.

AU - Nakanishi, H.

AU - Kobuchi, T.

AU - Inoue, N.

AU - Ohyabu, N.

AU - Nakamura, Y.

AU - Masuzaki, S.

AU - Muto, S.

AU - Sato, K.

AU - Morisaki, T.

AU - Yokoyama, M.

AU - Watanabe, T.

AU - Goto, M.

AU - Yamada, I.

AU - Ida, K.

AU - Tokuzawa, T.

AU - Noda, N.

AU - Yamaguchi, S.

AU - Akaishi, K.

AU - Sagara, A.

AU - Toi, K.

AU - Nishimura, K.

AU - Yamazaki, K.

AU - Sudo, S.

AU - Hamada, Y.

AU - Motojima, O.

AU - Fujiwara, M.

PY - 2001/8/1

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N2 - The ICRF heating experiments conducted in 1999 in the third experimental campaign on LHD are reported, with an emphasis on the optimization of the heating regime. Specifically. an exhaustive study of seven different heating regimes was carried out by changing the radiofrequency relative to the magnetic field intensity, and the dependence of the heating efficiency on H minority concentration was investigated. It was found in the experiment that both ion and electron heating are attainable with the same experimental set-up by properly choosing the frequency relative to the magnetic field intensity. In the cases of both electron heating and ion heating, the power absorption efficiency depends on the minority ion concentration. An optimum minority concentration exists in the ion heating case while, in the electron heating case, the efficiency increases with concentration monotonically. A simple model calculation is introduced to provide a heuristic understanding of these experimental results. Among the heating regimes examined in this experiment, one of the ion heating regimes was finally chosen as the optimized heating regime and various high performance discharges were realized with it.

AB - The ICRF heating experiments conducted in 1999 in the third experimental campaign on LHD are reported, with an emphasis on the optimization of the heating regime. Specifically. an exhaustive study of seven different heating regimes was carried out by changing the radiofrequency relative to the magnetic field intensity, and the dependence of the heating efficiency on H minority concentration was investigated. It was found in the experiment that both ion and electron heating are attainable with the same experimental set-up by properly choosing the frequency relative to the magnetic field intensity. In the cases of both electron heating and ion heating, the power absorption efficiency depends on the minority ion concentration. An optimum minority concentration exists in the ion heating case while, in the electron heating case, the efficiency increases with concentration monotonically. A simple model calculation is introduced to provide a heuristic understanding of these experimental results. Among the heating regimes examined in this experiment, one of the ion heating regimes was finally chosen as the optimized heating regime and various high performance discharges were realized with it.

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