WEKO3
アイテム
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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.\"", "subitem_description_type": "Abstract"}]}, "item_5_source_id_10": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "0915-633X", "subitem_source_identifier_type": "ISSN"}]}, "item_5_text_25": {"attribute_name": "登録情報", "attribute_value_mlt": [{"subitem_text_value": "Made available in DSpace on 2010-02-05T10:16:03Z (GMT). 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"subitem_subject_scheme": "Other"}, {"subitem_subject": "Nonlocal Electron Heat Transport", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Pettet Ablation", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Sawtooth Crash", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Heavy Ion Beam Probe", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "item_resource_type": {"attribute_name": "資源タイプ", "attribute_value_mlt": [{"resourcetype": "research report", "resourceuri": "http://purl.org/coar/resource_type/c_18ws"}]}, "item_title": "\"Studies of Perturbative Plasma Transport, Ice Pellet Ablation and Sawtooth Phenomena in the JIPP T-IIU Tokamak\"", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "\"Studies of 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"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/10655/2331473dd0b8-db42-4e78-8ff6-4a3f818a776a
Item type | 研究報告書 / Research Paper(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2010-02-05 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | "Studies of Perturbative Plasma Transport, Ice Pellet Ablation and Sawtooth Phenomena in the JIPP T-IIU Tokamak" | |||||
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.× 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." |
|||||
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 |
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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 |