Abstract
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 ν in is low, but it is stabilized when ν in is high. Furthermore, the drift and flute modes are coexistent for the intermediate values of ν in. 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.
| Original language | English |
|---|---|
| Article number | 054501 |
| Journal | journal of the physical society of japan |
| Volume | 76 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - May 1 2007 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
Cite this
Coexistence of collisional drift and flute wave instabilities in bounded linear ECR plasma. / Kamataki, Kunihiro; Nagashima, Yoshihiko; Shinohara, Shunjiro; Kawai, Yoshinobu; Yagi, Masatoshi; Itoh, Kimitaka; Itoh, Sanae I.
In: journal of the physical society of japan, Vol. 76, No. 5, 054501, 01.05.2007.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Coexistence of collisional drift and flute wave instabilities in bounded linear ECR plasma
AU - Kamataki, Kunihiro
AU - Nagashima, Yoshihiko
AU - Shinohara, Shunjiro
AU - Kawai, Yoshinobu
AU - Yagi, Masatoshi
AU - Itoh, Kimitaka
AU - Itoh, Sanae I.
PY - 2007/5/1
Y1 - 2007/5/1
N2 - 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 ν in is low, but it is stabilized when ν in is high. Furthermore, the drift and flute modes are coexistent for the intermediate values of ν in. 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.
AB - 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 ν in is low, but it is stabilized when ν in is high. Furthermore, the drift and flute modes are coexistent for the intermediate values of ν in. 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.
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U2 - 10.1143/JPSJ.76.054501
DO - 10.1143/JPSJ.76.054501
M3 - Article
AN - SCOPUS:34547490106
VL - 76
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 5
M1 - 054501
ER -