Extension of the operational regime in high-temperature plasmas and the dynamic-transport characteristics in the LHD

H. Takahashi; M. Osakabe; K. Nagaoka; S. Murakami; I. Yamada; Y. Takeiri; M. Yokoyama; H. Lee; K. Ida; R. Seki; C. Suzuki; M. Yoshinuma; T. Ido; A. Shimizu; M. Goto; S. Morita; T. Shimozuma; S. Kubo; S. Satake; S. Matsuoka; N. Tamura; H. Tsuchiya; K. Tanaka; M. Nunami; A. Wakasa; K. Tsumori; K. Ikeda; H. Nakano; M. Kisaki; Y. Yoshimura; M. Nishiura; H. Igami; T. Seki; H. Kasahara; K. Saito; R. Kumazawa; S. Muto; K. Narihara; T. Mutoh; O. Kaneko; H. Yamada

doi:10.1088/0029-5515/53/7/073034

Extension of the operational regime in high-temperature plasmas and the dynamic-transport characteristics in the LHD

H. Takahashi, M. Osakabe, K. Nagaoka, S. Murakami, I. Yamada, Y. Takeiri, M. Yokoyama, H. Lee, K. Ida, R. Seki, C. Suzuki, M. Yoshinuma, T. Ido, A. Shimizu, M. Goto, S. Morita, T. Shimozuma, S. Kubo, S. Satake, S. MatsuokaN. Tamura, H. Tsuchiya, K. Tanaka, M. Nunami, A. Wakasa, K. Tsumori, K. Ikeda, H. Nakano, M. Kisaki, Y. Yoshimura, M. Nishiura, H. Igami, T. Seki, H. Kasahara, K. Saito, R. Kumazawa, S. Muto, K. Narihara, T. Mutoh, O. Kaneko, H. Yamada

研究成果: ジャーナルへの寄稿 › 学術誌 › 査読

29 被引用数 (Scopus)

抄録

A central ion temperature of 7 keV in a neutral beam injection (NBI)-heated plasma and a central-electron temperature of 20 keV in an electron cyclotron resonance heating plasma were achieved in the Large Helical Device (LHD) using an upgraded heating system with a newly installed perpendicular-NB injector and gyrotrons. The values of T_i and T_e significantly exceeded 5.6 and 15 keV, obtained in previous experiments, respectively. High-T _i plasma was obtained using a carbon pellet injection and the kinetic-energy confinement improved by a factor of 1.5. Transport analysis of the high-T_i plasmas showed that the ion-thermal diffusivity and the viscosity were reduced after the pellet injection. Dynamic-transport analysis is applied and the transition to the ion-internal-transport barrier and back transition are discussed.

本文言語	英語
論文番号	073034
ジャーナル	Nuclear Fusion
巻	53
号	7
DOI	https://doi.org/10.1088/0029-5515/53/7/073034
出版ステータス	出版済み - 7月 2013
外部発表	はい

!!!All Science Journal Classification (ASJC) codes

核物理学および高エネルギー物理学
凝縮系物理学

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10.1088/0029-5515/53/7/073034

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引用スタイル

Takahashi, H., Osakabe, M., Nagaoka, K., Murakami, S., Yamada, I., Takeiri, Y., Yokoyama, M., Lee, H., Ida, K., Seki, R., Suzuki, C., Yoshinuma, M., Ido, T., Shimizu, A., Goto, M., Morita, S., Shimozuma, T., Kubo, S., Satake, S., ... Yamada, H. (2013). Extension of the operational regime in high-temperature plasmas and the dynamic-transport characteristics in the LHD. Nuclear Fusion, 53(7), [073034]. https://doi.org/10.1088/0029-5515/53/7/073034

Takahashi, H, Osakabe, M, Nagaoka, K, Murakami, S, Yamada, I, Takeiri, Y, Yokoyama, M, Lee, H, Ida, K, Seki, R, Suzuki, C, Yoshinuma, M, Ido, T, Shimizu, A, Goto, M, Morita, S, Shimozuma, T, Kubo, S, Satake, S, Matsuoka, S, Tamura, N, Tsuchiya, H, Tanaka, K, Nunami, M, Wakasa, A, Tsumori, K, Ikeda, K, Nakano, H, Kisaki, M, Yoshimura, Y, Nishiura, M, Igami, H, Seki, T, Kasahara, H, Saito, K, Kumazawa, R, Muto, S, Narihara, K, Mutoh, T, Kaneko, O & Yamada, H 2013, 'Extension of the operational regime in high-temperature plasmas and the dynamic-transport characteristics in the LHD', Nuclear Fusion, vol. 53, no. 7, 073034. https://doi.org/10.1088/0029-5515/53/7/073034

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title = "Extension of the operational regime in high-temperature plasmas and the dynamic-transport characteristics in the LHD",

abstract = "A central ion temperature of 7 keV in a neutral beam injection (NBI)-heated plasma and a central-electron temperature of 20 keV in an electron cyclotron resonance heating plasma were achieved in the Large Helical Device (LHD) using an upgraded heating system with a newly installed perpendicular-NB injector and gyrotrons. The values of Ti and Te significantly exceeded 5.6 and 15 keV, obtained in previous experiments, respectively. High-T i plasma was obtained using a carbon pellet injection and the kinetic-energy confinement improved by a factor of 1.5. Transport analysis of the high-Ti plasmas showed that the ion-thermal diffusivity and the viscosity were reduced after the pellet injection. Dynamic-transport analysis is applied and the transition to the ion-internal-transport barrier and back transition are discussed.",

author = "H. Takahashi and M. Osakabe and K. Nagaoka and S. Murakami and I. Yamada and Y. Takeiri and M. Yokoyama and H. Lee and K. Ida and R. Seki and C. Suzuki and M. Yoshinuma and T. Ido and A. Shimizu and M. Goto and S. Morita and T. Shimozuma and S. Kubo and S. Satake and S. Matsuoka and N. Tamura and H. Tsuchiya and K. Tanaka and M. Nunami and A. Wakasa and K. Tsumori and K. Ikeda and H. Nakano and M. Kisaki and Y. Yoshimura and M. Nishiura and H. Igami and T. Seki and H. Kasahara and K. Saito and R. Kumazawa and S. Muto and K. Narihara and T. Mutoh and O. Kaneko and H. Yamada",

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doi = "10.1088/0029-5515/53/7/073034",

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T1 - Extension of the operational regime in high-temperature plasmas and the dynamic-transport characteristics in the LHD

AU - Takahashi, H.

AU - Osakabe, M.

AU - Nagaoka, K.

AU - Murakami, S.

AU - Yamada, I.

AU - Takeiri, Y.

AU - Yokoyama, M.

AU - Lee, H.

AU - Ida, K.

AU - Seki, R.

AU - Suzuki, C.

AU - Yoshinuma, M.

AU - Ido, T.

AU - Shimizu, A.

AU - Goto, M.

AU - Morita, S.

AU - Shimozuma, T.

AU - Kubo, S.

AU - Satake, S.

AU - Matsuoka, S.

AU - Tamura, N.

AU - Tsuchiya, H.

AU - Tanaka, K.

AU - Nunami, M.

AU - Wakasa, A.

AU - Tsumori, K.

AU - Ikeda, K.

AU - Nakano, H.

AU - Kisaki, M.

AU - Yoshimura, Y.

AU - Nishiura, M.

AU - Igami, H.

AU - Seki, T.

AU - Kasahara, H.

AU - Saito, K.

AU - Kumazawa, R.

AU - Muto, S.

AU - Narihara, K.

AU - Mutoh, T.

AU - Kaneko, O.

AU - Yamada, H.

PY - 2013/7

Y1 - 2013/7

N2 - A central ion temperature of 7 keV in a neutral beam injection (NBI)-heated plasma and a central-electron temperature of 20 keV in an electron cyclotron resonance heating plasma were achieved in the Large Helical Device (LHD) using an upgraded heating system with a newly installed perpendicular-NB injector and gyrotrons. The values of Ti and Te significantly exceeded 5.6 and 15 keV, obtained in previous experiments, respectively. High-T i plasma was obtained using a carbon pellet injection and the kinetic-energy confinement improved by a factor of 1.5. Transport analysis of the high-Ti plasmas showed that the ion-thermal diffusivity and the viscosity were reduced after the pellet injection. Dynamic-transport analysis is applied and the transition to the ion-internal-transport barrier and back transition are discussed.

AB - A central ion temperature of 7 keV in a neutral beam injection (NBI)-heated plasma and a central-electron temperature of 20 keV in an electron cyclotron resonance heating plasma were achieved in the Large Helical Device (LHD) using an upgraded heating system with a newly installed perpendicular-NB injector and gyrotrons. The values of Ti and Te significantly exceeded 5.6 and 15 keV, obtained in previous experiments, respectively. High-T i plasma was obtained using a carbon pellet injection and the kinetic-energy confinement improved by a factor of 1.5. Transport analysis of the high-Ti plasmas showed that the ion-thermal diffusivity and the viscosity were reduced after the pellet injection. Dynamic-transport analysis is applied and the transition to the ion-internal-transport barrier and back transition are discussed.

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JF - Nuclear Fusion

SN - 0029-5515

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Extension of the operational regime in high-temperature plasmas and the dynamic-transport characteristics in the LHD

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