Stabilization of the resistive wall mode instability by trapped energetic particles

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3569854· OSTI ID:21537299

Hao, G Z; Wang, A K; Jiang, H B; Lu, Gaimin; He, H D; Qiu, X M ^[1]; Liu, Y Q ^[2]

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1. Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041 (China)
2. Euratom/CCFE Fusion Association, Culham Science Centre, Abingdon, Oxon OX14 3DB (United Kingdom)

A theoretical model for investigating the effect of the trapped energetic particles (EPs) on the resistive wall mode (RWM) instability is proposed. The results demonstrate that the trapped EPs have a dramatic stabilizing effect on the RWM because of resonant interaction between the mode and the magnetic precession drift motion of the trapped EPs. The results also show that the effect of the trapped EPs depends on the wall position. In addition, the stabilizing effect becomes stronger when the plasma rotation is taken into account. For sufficiently fast plasma rotation, the trapped EPs can lead to the complete stabilization of the RWM. Furthermore, the trapped EPs can induce a finite real frequency of the RWM in the absence of plasma rotation.

• OSTI ID: 21537299
• Journal Information: Physics of Plasmas, Vol. 18, Issue 3; Other Information: DOI: 10.1063/1.3569854; (c) 2011 American Institute of Physics; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
PLASMA
STABILIZATION
TRAPPED-PARTICLE INSTABILITY
INSTABILITY
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES