Effect of kinetic resonances on the stability of Resistive Wall Mode in Reversed Field Pinch

TL;DR

This paper investigates how kinetic resonances influence the stability of the Resistive Wall Mode in Reversed Field Pinch plasmas, finding that these effects are generally weak and do not significantly alter mode growth or stability.

Contribution

It provides a numerical analysis showing that kinetic effects have minimal impact on RWM stability in RFPs, supporting the adequacy of ideal MHD models.

Findings

Kinetic effects are too weak to significantly change mode growth rates.

Ideal MHD models are adequate for RWM physics in RFPs.

Kinetic resonance effects do not substantially alter stability margins.

Abstract

The kinetic effects, due to the mode resonance with thermal particle drift motions in the reversed field pinch (RFP) plasmas, are numerically investigated for the stability of the resistive wall mode, using a non-perturbative MHD-kinetic hybrid formulation. The kinetic effects are generally found too weak to substantially change the mode growth rate, or the stability margin, re-enforcing the fact that the ideal MHD model is rather adequate for describing the RWM physics in RFP experiments.