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During the density rise, the transport barrier with steep temperature and density gradients near the plasma edge has been formed. Edge localized modes ( ELM )-like activity is also observed. Incoherent magnetic fluctuations in the frequency range f \u003e 20 kHz are clearly suppressed during the density rise phase, while low frequency coherent part remains almost unchanged. Global energy confinement time in the density rise phase is improved by ~15 %, compared with that of the discharge without the OH-current. These experimental observations are very similar to the H-mode in tokamaks. There is a threshold of the current for the transition, where the increment of rotational transform by the threshold current corresponds to ~ 0.1 at the edge. No obvious increase in the edge poloidal rotation velocity, however, is observed during the density rise phase, that is, at most ~ 3 km/s.\"", "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 2010-02-05T10:17:15Z (GMT). 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Formation of H-mode Like Transport Barrier in the CHS Heliotron / Torsatron
http://hdl.handle.net/10655/2593
http://hdl.handle.net/10655/2593384f5437-d46e-4d5a-b4c2-cd7df31ebd24
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 | Formation of H-mode Like Transport Barrier in the CHS Heliotron / Torsatron | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | H-mode | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | transport barrier | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | heliotron/torsatron | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | rotational transform | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | confinement improvement | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | edge localized modes | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | threshold plasma current | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | edge poloidal rotation | |||||
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.× Okamura, S.× Iguchi, H.× Yamada, H.× Morita, S.× Sakakibara, S.× Ida, K.× Nishimura, K.× Matsuoka, K.× Akiyama, R.× Arimoto, H.× Fujiwara, M.× Hosokawa, M.× Idei, H.× Kaneko, O.× Kubo, S.× Sagara, A.× Takahashi, C.× Takeiri, Y.× Takita, Y.× Tsumori, K.× Yamada, I.× Zushi, H." |
|||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | "Control of rotational transform profile with a small ohmic heating ( OH-) current to increase the rotational transform has led to a continuous rise in the line-averaged electron density with reduction of H alpha-lights around the torus, in a heliotron/torsatron plasma heated by neutral beams. During the density rise, the transport barrier with steep temperature and density gradients near the plasma edge has been formed. Edge localized modes ( ELM )-like activity is also observed. Incoherent magnetic fluctuations in the frequency range f > 20 kHz are clearly suppressed during the density rise phase, while low frequency coherent part remains almost unchanged. Global energy confinement time in the density rise phase is improved by ~15 %, compared with that of the discharge without the OH-current. These experimental observations are very similar to the H-mode in tokamaks. There is a threshold of the current for the transition, where the increment of rotational transform by the threshold current corresponds to ~ 0.1 at the edge. No obvious increase in the edge poloidal rotation velocity, however, is observed during the density rise phase, that is, at most ~ 3 km/s." | |||||
書誌情報 |
en : Research Report NIFS-Series 発行日 1992-10-01 |
|||||
報告書番号 | ||||||
NIFS-198 | ||||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0915-633X |