WEKO3
アイテム
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This newly found current has a possibility to reduce the bootstrap current under a suitable condition even in the opposite direction in Heliotron/Torsatron. The differences between the rotations of bulk ions and impurities are discussed in the case where impurities are in the Pfirsh-Schluter collisionality regime. In connection with the bootstrap current the effects of the net toroidal current on the ideal interchange instability are numerically studied taking the Large Helical Device (LHD) as an example. The direction of the current is crucial to the Mercier criterion. Helicity-induced shear Alfven eigenmodes (HAE) attributed to the helicity of helical coils are considered for the first time in Heliotron/Torsatron and compared with TAE modes. Spectral gaps and eigenmodes significantly depend on the finite-beta effects. Radial electric field producing poloidal shear flow also plays a role for the edge anomalous transport in Heliotron/Torsatron. The electrostatic resistive interchange mode which is considered origin of the anomalous transport can be stabilized linearly by the poloidal shear flow. However, its effects on the turbulent state practically disappears by the nonlinear simulation for the resistive drift wave and interchange turbulence. It is pointed out that the poloidal shear flow destabilizes the electromagnetic ideal interchange mode.\"", "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 2010-02-05T10:17:11Z (GMT). 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"Neoclassical Current and Related MHD Stability, Gap Modes, and Radial Electric Field Effects in Heliotron and Torsatron Plasmas"
http://hdl.handle.net/10655/2579
http://hdl.handle.net/10655/2579876bcb3f-0eda-49ac-9a9f-1243fa9a12c2
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 | "Neoclassical Current and Related MHD Stability, Gap Modes, and Radial Electric Field Effects in Heliotron and Torsatron Plasmas" | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Neoclassical current | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | radial electric field | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | net toroidal current | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Mercier criterion | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | TAE | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | HAE | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | poloidal shear flow | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | resistive and ideal interchangte modes | |||||
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 |
"Nakajima, N.
× "Nakajima, N.× Ichiguchi, K.× Watanabe, K.× Sugama, H.× Okamoto, M.× Wakatani, M.× Nakamura, Y.× Cheng, C. Z." |
|||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | "By developing the neoclassical theory for parallel flow it is found out that if nu_e^* neq nu_i^* a parallel current directly generated by the radial electric field, which does not exist in axisymmetric systems, exists in the non-axisymmetric systems. This newly found current has a possibility to reduce the bootstrap current under a suitable condition even in the opposite direction in Heliotron/Torsatron. The differences between the rotations of bulk ions and impurities are discussed in the case where impurities are in the Pfirsh-Schluter collisionality regime. In connection with the bootstrap current the effects of the net toroidal current on the ideal interchange instability are numerically studied taking the Large Helical Device (LHD) as an example. The direction of the current is crucial to the Mercier criterion. Helicity-induced shear Alfven eigenmodes (HAE) attributed to the helicity of helical coils are considered for the first time in Heliotron/Torsatron and compared with TAE modes. Spectral gaps and eigenmodes significantly depend on the finite-beta effects. Radial electric field producing poloidal shear flow also plays a role for the edge anomalous transport in Heliotron/Torsatron. The electrostatic resistive interchange mode which is considered origin of the anomalous transport can be stabilized linearly by the poloidal shear flow. However, its effects on the turbulent state practically disappears by the nonlinear simulation for the resistive drift wave and interchange turbulence. It is pointed out that the poloidal shear flow destabilizes the electromagnetic ideal interchange mode." | |||||
書誌情報 |
en : Research Report NIFS-Series 発行日 1992-09-01 |
|||||
報告書番号 | ||||||
NIFS-169 | ||||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0915-633X |