Drift-wave instability excited by field-aligned ion flow velocity shear in the absence of electron current

T. Kaneko, Hironori Tsunoyama, R. Hatakeyama

研究成果: Article

58 引用 (Scopus)

抄録

The excitation of the drift-wave instability by the ion flow velocity shear in the absence of the electron drift flow was experimentally demonstrated. The fluctuation amplitude was observed to increase with increasing the shear strength, but the instability was found to be gradually stabilized when the shear strength exceeds the critical value. The experimental results are in good agreement with the dependence of the theoretical growth rate on the shear parameter, which is calculated in the kinetic treatment including the effect of the radial density gradient.

元の言語English
ジャーナルPhysical Review Letters
90
発行部数12
出版物ステータスPublished - 2003 3 28
外部発表Yes

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shear strength
flow velocity
shear
ions
electrons
gradients
kinetics
excitation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

これを引用

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abstract = "The excitation of the drift-wave instability by the ion flow velocity shear in the absence of the electron drift flow was experimentally demonstrated. The fluctuation amplitude was observed to increase with increasing the shear strength, but the instability was found to be gradually stabilized when the shear strength exceeds the critical value. The experimental results are in good agreement with the dependence of the theoretical growth rate on the shear parameter, which is calculated in the kinetic treatment including the effect of the radial density gradient.",
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AU - Kaneko, T.

AU - Tsunoyama, Hironori

AU - Hatakeyama, R.

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Y1 - 2003/3/28

N2 - The excitation of the drift-wave instability by the ion flow velocity shear in the absence of the electron drift flow was experimentally demonstrated. The fluctuation amplitude was observed to increase with increasing the shear strength, but the instability was found to be gradually stabilized when the shear strength exceeds the critical value. The experimental results are in good agreement with the dependence of the theoretical growth rate on the shear parameter, which is calculated in the kinetic treatment including the effect of the radial density gradient.

AB - The excitation of the drift-wave instability by the ion flow velocity shear in the absence of the electron drift flow was experimentally demonstrated. The fluctuation amplitude was observed to increase with increasing the shear strength, but the instability was found to be gradually stabilized when the shear strength exceeds the critical value. The experimental results are in good agreement with the dependence of the theoretical growth rate on the shear parameter, which is calculated in the kinetic treatment including the effect of the radial density gradient.

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