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Title: Combined effects of trapped energetic ions and resistive layer damping on the stability of the resistive wall mode

A dispersion relation is derived for the stability of the resistive wall mode (RWM), which includes both the resistive layer damping physics and the toroidal precession drift resonance damping from energetic ions in tokamak plasmas. The dispersion relation is numerically solved for a model plasma, for the purpose of systematic investigation of the RWM stability in multi-dimensional plasma parameter space including the plasma resistivity, the radial location of the resistive wall, as well as the toroidal flow velocity. It is found that the toroidal favorable average curvature in the resistive layer contributes a significant stabilization of the RWM. This stabilization is further enhanced by adding the drift kinetic contribution from energetic ions. Furthermore, two traditionally assumed inner layer models are considered and compared in the dispersion relation, resulting in different predictions for the stability of the RWM.
Authors:
; ; ;  [1] ;  [2] ;  [3] ;  [4] ; ;  [5] ;  [6] ;  [7]
  1. Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Ministry of Education, School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China)
  2. CCFE, Culham Science Centre, Abingdon OX14 3DB (United Kingdom)
  3. (China)
  4. (Sweden)
  5. Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041 (China)
  6. College of Science, Donghua University, Shanghai 201620 (China)
  7. School of Mathematics and Statistics Science, Ludong University, Yantai 264025 (China)
Publication Date:
OSTI Identifier:
22493816
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 23; Journal Issue: 1; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DAMPING; DISPERSION RELATIONS; FIRST WALL; MATHEMATICAL SPACE; PLASMA; PLASMA SIMULATION; PRECESSION; STABILITY; STABILIZATION; TAIL IONS; TOKAMAK DEVICES; TOROIDAL CONFIGURATION; TRAPPED-PARTICLE INSTABILITY