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Resistive g-modes in a reversed-field pinch plasma

M. Zuin, S. Spagnolo, R. Paccagnella, E. Martines, R. Cavazzana, G. Serianni, M. Spolaore, N. Vianello2010年被引用 9Nuclear FusionIF 3出版社

The first direct experimental evidence of high frequency, high toroidal mode number magnetic fluctuations due to unstable resistive interchange modes (g-modes) resonant in the edge region of a RFX-mod reversed-field pinch device is presented. Experimental characterization of time and space periodicities of the modes is provided by means of highly resolved in-vessel edge and insertable magnetic diagnostics. Although the saturated energy spectrum of the measured modes is expected to be highly nonlinear, it is found that the spectral mode properties are in good agreement with the predictions of a simple linear resistive magnetohydrodynamic stability analysis. Also a simple quasi-linear saturation model is proposed to explain the observed mode amplitudes.

日本語訳

抵抗性交換モード(gモード)がRFX-mod逆転磁場ピンチ装置の周辺領域に共鳴することによって生じる、高周波・高トロイダルモード数の磁気揺動に関する初の直接的な実験的証拠を提示する。高分解能の真空容器内周辺部および挿入型磁気診断装置を用いて、モードの時間的・空間的周期性の実験的特徴付けを行う。測定されたモードの飽和エネルギースペクトルは高度に非線形であると予想されるが、スペクトルモードの特性は単純な線形抵抗性磁気流体力学安定性解析の予測とよく一致することが見出された。また、観測されたモード振幅を説明するために、単純な準線形飽和モデルを提案する。

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Reversed field pinchPinch plasma
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