Resistive g-modes in a reversed field pinch plasma

Details Resistive g-modes in a reversed field pinch plasma Resistive g-modes in a reversed field pinch plasma

2009-09-11

arxiv.org/abs/0909.2153v1

Physics

Plasma Physics

Submitted to Physical Review Letters

Scientific paper

First direct experimental evidence of high frequency, high toroidal mode number (n>20), magnetic fluctuations due to unstable resistive interchange modes (g-modes) resonant in the edge region of a reversed field pinch (RFP) plasma 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. It is found that the spectral mode properties are in good agreement with the predictions of the theoretical linear resistive magnetohydrodynamic stability analysis. A simple model is proposed for the observed saturation levels of the modes.

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