Extension of operational regime in high-temperature plasmas and effect of ECRH on ion thermal transport in the LHD

H. Takahashi; K. Nagaoka; S. Murakami; M. Osakabe; H. Nakano; K. Ida; T. I. Tsujimura; S. Kubo; T. Kobayashi; K. Tanaka; R. Seki; Y. Takeiri; M. Yokoyama; S. Maeta; M. Nakata; M. Yoshinuma; I. Yamada; R. Yasuhara; T. Ido; A. Shimizu; H. Tsuchiya; T. Tokuzawa; M. Goto; T. Oishi; S. Morita; C. Suzuki; M. Emoto; K. Tsumori; K. Ikeda; M. Kisaki; T. Shimozuma; Y. Yoshimura; H. Igami; R. Makino; T. Seki; H. Kasahara; K. Saito; S. Kamio; K. Nagasaki; T. Mutoh; O. Kaneko; T. Morisaki

doi:10.1088/1741-4326/aa754b

Extension of operational regime in high-temperature plasmas and effect of ECRH on ion thermal transport in the LHD

H. Takahashi, K. Nagaoka, S. Murakami, M. Osakabe, H. Nakano, K. Ida, T. I. Tsujimura, S. Kubo, T. Kobayashi, K. Tanaka, R. Seki, Y. Takeiri, M. Yokoyama, S. Maeta, M. Nakata, M. Yoshinuma, I. Yamada, R. Yasuhara, T. Ido, A. ShimizuH. Tsuchiya, T. Tokuzawa, M. Goto, T. Oishi, S. Morita, C. Suzuki, M. Emoto, K. Tsumori, K. Ikeda, M. Kisaki, T. Shimozuma, Y. Yoshimura, H. Igami, R. Makino, T. Seki, H. Kasahara, K. Saito, S. Kamio, K. Nagasaki, T. Mutoh, O. Kaneko, T. Morisaki

研究成果: ジャーナルへの寄稿 › 学術誌 › 査読

15 被引用数 (Scopus)

抄録

A simultaneous high ion temperature (T _i) and high electron temperature (T _e) regime was successfully extended due to an optimized heating scenario in the LHD. Such high-temperature plasmas were realized by the simultaneous formation of an electron internal transport barrier (ITB) and an ion ITB by the combination of high power NBI and ECRH. Although the ion thermal confinement was degraded in the plasma core with an increase of T _e/T _i by the on-axis ECRH, it was found that the ion thermal confinement was improved at the plasma edge. The normalized ion thermal diffusivity at the plasma edge was reduced by 70%. The improvement of the ion thermal confinement at the edge led to an increase in T _i in the entire plasma region, even though the core transport was degraded.

本文言語	英語
論文番号	086029
ジャーナル	Nuclear Fusion
巻	57
号	8
DOI	https://doi.org/10.1088/1741-4326/aa754b
出版ステータス	出版済み - 7月 4 2017
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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10.1088/1741-4326/aa754b

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Takahashi, H., Nagaoka, K., Murakami, S., Osakabe, M., Nakano, H., Ida, K., Tsujimura, T. I., Kubo, S., Kobayashi, T., Tanaka, K., Seki, R., Takeiri, Y., Yokoyama, M., Maeta, S., Nakata, M., Yoshinuma, M., Yamada, I., Yasuhara, R., Ido, T., ... Morisaki, T. (2017). Extension of operational regime in high-temperature plasmas and effect of ECRH on ion thermal transport in the LHD. Nuclear Fusion, 57(8), [086029]. https://doi.org/10.1088/1741-4326/aa754b

Takahashi, H, Nagaoka, K, Murakami, S, Osakabe, M, Nakano, H, Ida, K, Tsujimura, TI, Kubo, S, Kobayashi, T, Tanaka, K, Seki, R, Takeiri, Y, Yokoyama, M, Maeta, S, Nakata, M, Yoshinuma, M, Yamada, I, Yasuhara, R, Ido, T, Shimizu, A, Tsuchiya, H, Tokuzawa, T, Goto, M, Oishi, T, Morita, S, Suzuki, C, Emoto, M, Tsumori, K, Ikeda, K, Kisaki, M, Shimozuma, T, Yoshimura, Y, Igami, H, Makino, R, Seki, T, Kasahara, H, Saito, K, Kamio, S, Nagasaki, K, Mutoh, T, Kaneko, O & Morisaki, T 2017, 'Extension of operational regime in high-temperature plasmas and effect of ECRH on ion thermal transport in the LHD', Nuclear Fusion, vol. 57, no. 8, 086029. https://doi.org/10.1088/1741-4326/aa754b

@article{b29fb1f128b14fcf9b0086d92f96080b,

title = "Extension of operational regime in high-temperature plasmas and effect of ECRH on ion thermal transport in the LHD",

abstract = "A simultaneous high ion temperature (T i) and high electron temperature (T e) regime was successfully extended due to an optimized heating scenario in the LHD. Such high-temperature plasmas were realized by the simultaneous formation of an electron internal transport barrier (ITB) and an ion ITB by the combination of high power NBI and ECRH. Although the ion thermal confinement was degraded in the plasma core with an increase of T e/T i by the on-axis ECRH, it was found that the ion thermal confinement was improved at the plasma edge. The normalized ion thermal diffusivity at the plasma edge was reduced by 70%. The improvement of the ion thermal confinement at the edge led to an increase in T i in the entire plasma region, even though the core transport was degraded.",

author = "H. Takahashi and K. Nagaoka and S. Murakami and M. Osakabe and H. Nakano and K. Ida and Tsujimura, {T. I.} and S. Kubo and T. Kobayashi and K. Tanaka and R. Seki and Y. Takeiri and M. Yokoyama and S. Maeta and M. Nakata and M. Yoshinuma and I. Yamada and R. Yasuhara and T. Ido and A. Shimizu and H. Tsuchiya and T. Tokuzawa and M. Goto and T. Oishi and S. Morita and C. Suzuki and M. Emoto and K. Tsumori and K. Ikeda and M. Kisaki and T. Shimozuma and Y. Yoshimura and H. Igami and R. Makino and T. Seki and H. Kasahara and K. Saito and S. Kamio and K. Nagasaki and T. Mutoh and O. Kaneko and T. Morisaki",

note = "Funding Information: This work was supported by NIFS grants ULRR701, 702, 801, 802, 804, 808, 809, KLER045. Publisher Copyright: {\textcopyright} 2017 IAEA, Vienna.",

year = "2017",

month = jul,

day = "4",

doi = "10.1088/1741-4326/aa754b",

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T1 - Extension of operational regime in high-temperature plasmas and effect of ECRH on ion thermal transport in the LHD

AU - Takahashi, H.

AU - Nagaoka, K.

AU - Murakami, S.

AU - Osakabe, M.

AU - Nakano, H.

AU - Ida, K.

AU - Tsujimura, T. I.

AU - Kubo, S.

AU - Kobayashi, T.

AU - Tanaka, K.

AU - Seki, R.

AU - Takeiri, Y.

AU - Yokoyama, M.

AU - Maeta, S.

AU - Nakata, M.

AU - Yoshinuma, M.

AU - Yamada, I.

AU - Yasuhara, R.

AU - Ido, T.

AU - Shimizu, A.

AU - Tsuchiya, H.

AU - Tokuzawa, T.

AU - Goto, M.

AU - Oishi, T.

AU - Morita, S.

AU - Suzuki, C.

AU - Emoto, M.

AU - Tsumori, K.

AU - Ikeda, K.

AU - Kisaki, M.

AU - Shimozuma, T.

AU - Yoshimura, Y.

AU - Igami, H.

AU - Makino, R.

AU - Seki, T.

AU - Kasahara, H.

AU - Saito, K.

AU - Kamio, S.

AU - Nagasaki, K.

AU - Mutoh, T.

AU - Kaneko, O.

AU - Morisaki, T.

PY - 2017/7/4

Y1 - 2017/7/4

N2 - A simultaneous high ion temperature (T i) and high electron temperature (T e) regime was successfully extended due to an optimized heating scenario in the LHD. Such high-temperature plasmas were realized by the simultaneous formation of an electron internal transport barrier (ITB) and an ion ITB by the combination of high power NBI and ECRH. Although the ion thermal confinement was degraded in the plasma core with an increase of T e/T i by the on-axis ECRH, it was found that the ion thermal confinement was improved at the plasma edge. The normalized ion thermal diffusivity at the plasma edge was reduced by 70%. The improvement of the ion thermal confinement at the edge led to an increase in T i in the entire plasma region, even though the core transport was degraded.

AB - A simultaneous high ion temperature (T i) and high electron temperature (T e) regime was successfully extended due to an optimized heating scenario in the LHD. Such high-temperature plasmas were realized by the simultaneous formation of an electron internal transport barrier (ITB) and an ion ITB by the combination of high power NBI and ECRH. Although the ion thermal confinement was degraded in the plasma core with an increase of T e/T i by the on-axis ECRH, it was found that the ion thermal confinement was improved at the plasma edge. The normalized ion thermal diffusivity at the plasma edge was reduced by 70%. The improvement of the ion thermal confinement at the edge led to an increase in T i in the entire plasma region, even though the core transport was degraded.

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DO - 10.1088/1741-4326/aa754b

M3 - Article

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SN - 0029-5515

VL - 57

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 8

M1 - 086029

ER -

Extension of operational regime in high-temperature plasmas and effect of ECRH on ion thermal transport in the LHD

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