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  1. NIFS Series
  2. NIFS Report

"Studies of Perturbative Plasma Transport, Ice Pellet Ablation and Sawtooth Phenomena in the JIPP T-IIU Tokamak"

http://hdl.handle.net/10655/2331
http://hdl.handle.net/10655/2331
473dd0b8-db42-4e78-8ff6-4a3f818a776a
Item type 研究報告書 / Research Paper(1)
公開日 2010-02-05
タイトル
タイトル "Studies of Perturbative Plasma Transport, Ice Pellet Ablation and Sawtooth Phenomena in the JIPP T-IIU Tokamak"
言語 en
言語
言語 eng
キーワード
言語 en
主題Scheme Other
主題 Tokamak
キーワード
言語 en
主題Scheme Other
主題 Perturbative Plasma Transport
キーワード
言語 en
主題Scheme Other
主題 Nonlocal Electron Heat Transport
キーワード
言語 en
主題Scheme Other
主題 Pettet Ablation
キーワード
言語 en
主題Scheme Other
主題 Sawtooth Crash
キーワード
言語 en
主題Scheme Other
主題 Heavy Ion Beam Probe
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_18ws
資源タイプ research report
アクセス権
アクセス権 metadata only access
アクセス権URI http://purl.org/coar/access_right/c_14cb
著者 "Toi, K.

× "Toi, K.

en "Toi, K.

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Sato, K.N.

× Sato, K.N.

en Sato, K.N.

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Hamada, Y.

× Hamada, Y.

en Hamada, Y.

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Ohdachi, S.

× Ohdachi, S.

en Ohdachi, S.

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Sakakita, H.

× Sakakita, H.

en Sakakita, H.

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Nishizawa, A.

× Nishizawa, A.

en Nishizawa, A.

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Ejiri, A.

× Ejiri, A.

en Ejiri, A.

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Narihara, K.

× Narihara, K.

en Narihara, K.

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Kuramoto, H.

× Kuramoto, H.

en Kuramoto, H.

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Kawasumi, Y.

× Kawasumi, Y.

en Kawasumi, Y.

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Kubo, S.

× Kubo, S.

en Kubo, S.

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Seki, T.

× Seki, T.

en Seki, T.

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Kitachi, K.

× Kitachi, K.

en Kitachi, K.

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Xu, J.

× Xu, J.

en Xu, J.

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Ida, K.

× Ida, K.

en Ida, K.

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Kawahata, K.

× Kawahata, K.

en Kawahata, K.

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Nomura, I.

× Nomura, I.

en Nomura, I.

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Adachi, K.

× Adachi, K.

en Adachi, K.

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Akiyama, R.

× Akiyama, R.

en Akiyama, R.

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Fujisawa, A.

× Fujisawa, A.

en Fujisawa, A.

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Fujita, J.

× Fujita, J.

en Fujita, J.

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Hiraki, N.

× Hiraki, N.

en Hiraki, N.

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Hidekuma, S.

× Hidekuma, S.

en Hidekuma, S.

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Hirokura, S.

× Hirokura, S.

en Hirokura, S.

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Idei, H.

× Idei, H.

en Idei, H.

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Ido, T.

× Ido, T.

en Ido, T.

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Iguchi, H.

× Iguchi, H.

en Iguchi, H.

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Iwasaki, K.

× Iwasaki, K.

en Iwasaki, K.

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Isobe, M.

× Isobe, M.

en Isobe, M.

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Kaneko, O.

× Kaneko, O.

en Kaneko, O.

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Kano, Y.

× Kano, Y.

en Kano, Y.

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Kojima, M.

× Kojima, M.

en Kojima, M.

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Koog, J.

× Koog, J.

en Koog, J.

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Kumazawa, R.

× Kumazawa, R.

en Kumazawa, R.

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Kuroda, T.

× Kuroda, T.

en Kuroda, T.

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Li, J.

× Li, J.

en Li, J.

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Liang, R.

× Liang, R.

en Liang, R.

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Minami, T.

× Minami, T.

en Minami, T.

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Morita, S.

× Morita, S.

en Morita, S.

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Ohkubo, K.

× Ohkubo, K.

en Ohkubo, K.

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Oka, Y.

× Oka, Y.

en Oka, Y.

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Okajima, S.

× Okajima, S.

en Okajima, S.

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Osakabe, M.

× Osakabe, M.

en Osakabe, M.

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Sakawa, Y.

× Sakawa, Y.

en Sakawa, Y.

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Sasao, M.

× Sasao, M.

en Sasao, M.

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Sato, K.

× Sato, K.

en Sato, K.

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Shimpo, T.

× Shimpo, T.

en Shimpo, T.

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Shoji, T.

× Shoji, T.

en Shoji, T.

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Sugai, H.

× Sugai, H.

en Sugai, H.

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Watari, T.

× Watari, T.

en Watari, T.

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Yamada, I.

× Yamada, I.

en Yamada, I.

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Yamauti, K."

× Yamauti, K."

en Yamauti, K."

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抄録
内容記述タイプ Abstract
内容記述 "ln the JIPP T-IIU tokamak edge cooling imposed by positive biasing of an inserted electrode and injection of a small ice pellet induces an alrnost instantaneous increase in the electron temperature near the center. Rapid current ramp-up increases electron temperature at the edge. Thus produced hot front quickly propagates toward the center, although the toroidal current density increased by the ramp-up is still confined in the edge region of r/a geq 0.7. Rapid current ramp-up also induces a small but sudden drop of the central electron temperature which takes place at much earlier time than the current penetration. The results from cold pulse and current ramp-up experiments suggest nonlocal electron heat transport. A long helical shape (""tail"") of ablation light is observed when an ice pellet is injected on-axis(horizontal) and slightly upward or downward off-axis. The direction of the tail is found to be closely related to plasma rotation. Plasma potential and density profile are widely controlled by changing the injection angle of a pellet and pellet size. Radial profiles of particle diffusion coefficient and inward convection velocity are derived from time evolution of density profiles realized by the pellet injection. Rapid potential change is observed during sawtooth crash by a heavy ion beam probe (HIBP). This potential change is caused by combination between arnbipolar electric field and rapid MHD motion across the magnetic field. However, poloidal magnetic flux near the sawtooth inversion radius measured by HIBP hardly changes at the crash. A multichannel motional stark effect polarimeter has revealed that the safety factor at the plasma center becomes well below unity, i.e., 0.7-0.8 during sawtoothing phase. These results suggest a partial reconnection takes place at the sawtooth crash."
書誌情報 en : Research Report NIFS-Series

発行日 1996-09-01
報告書番号
NIFS-442
ISSN
収録物識別子タイプ ISSN
収録物識別子 0915-633X
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Cite as

"Toi, K., Sato, K.N., Hamada, Y., Ohdachi, S., Sakakita, H., Nishizawa, A., Ejiri, A., Narihara, K., Kuramoto, H., Kawasumi, Y., Kubo, S., Seki, T., Kitachi, K., Xu, J., Ida, K., Kawahata, K., Nomura, I., Adachi, K., Akiyama, R., Fujisawa, A., Fujita, J., Hiraki, N., Hidekuma, S., Hirokura, S., Idei, H., Ido, T., Iguchi, H., Iwasaki, K., Isobe, M., Kaneko, O., Kano, Y., Kojima, M., Koog, J., Kumazawa, R., Kuroda, T., Li, J., Liang, R., Minami, T., Morita, S., Ohkubo, K., Oka, Y., Okajima, S., Osakabe, M., Sakawa, Y., Sasao, M., Sato, K., Shimpo, T., Shoji, T., Sugai, H., Watari, T., Yamada, I., Yamauti, K.", 1996, "Studies of Perturbative Plasma Transport, Ice Pellet Ablation and Sawtooth Phenomena in the JIPP T-IIU Tokamak".

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