Coexistence of Collisional Drift and Flute Wave Instabilities in Bounded Linear ECR Plasma
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- Kamataki Kunihiro
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
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- Nagashima Yoshihiko
- Research Institute for Applied Mechanics, Kyushu University
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- Shinohara Shunjiro
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
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- Kawai Yoshinobu
- Research Institute for Applied Mechanics, Kyushu University
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- Yagi Masatoshi
- Research Institute for Applied Mechanics, Kyushu University
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- Itoh Kimitaka
- National Institute for Fusion Science
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- Itoh Sanae-I.
- Research Institute for Applied Mechanics, Kyushu University
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This paper reports the experimental and theoretical investigation on the coexistence of the collisional drift and flute wave instabilities in the bounded linear electron cyclotron resonance (ECR) plasma. The drift wave instability is excited by the steep density gradient and imposed axial boundary conditions in the device. The flute instability is excited by the bad curvature of the magnetic field. Emphasis is made on the effect of the ion–neutral (i–n) particle collisions. It is observed that the drift wave instability is excited when the i–n particle collision frequency νin is low, but it is stabilized when νin is high. Furthermore, the drift and flute modes are coexistent for the intermediate values of νin. The Hasegawa–Wakatani model which describes the dispersion relation of the collisional drift-interchange mode is used for understanding the experimental observations. It is found that the experimentally observed drift frequency is consistent with the numerical calculation. The present result has shown that the i–n particle collisions play an important role in the stabilization of the collisional drift wave instability in the ECR plasma.
収録刊行物
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 76 (5), 054501-054501, 2007
一般社団法人 日本物理学会
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詳細情報 詳細情報について
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- CRID
- 1390001204193755520
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- NII論文ID
- 130005296889
- 110006273189
- 210000106693
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- NII書誌ID
- AA00704814
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 8729142
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 使用不可