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Title: Numerical simulation of geodesic acoustic modes in a multi-ion system

Based on the semi-Lagrangian method, a δf drift kinetic continuum code incorporating magnetic flux coordinate was developed and applied to investigate the geodesic acoustic mode (GAM) oscillation in a multi-ion plasma system. This work proves clearly that the effective ion mass number affects the GAM in a multi-ion system. In this simulation, GAM frequency and damping rate are seen to vary with the proportion of impurity ions. The numerical result is consistent with the theoretical prediction in terms of both frequency and damping rate.
Authors:
; ;  [1] ;  [2]
  1. Institute of Plasma Physics, Chinese Academy of Science, Hefei, Anhui 230031 (China)
  2. Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China)
Publication Date:
OSTI Identifier:
22227946
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 7; Other Information: (c) 2013 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; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPUTERIZED SIMULATION; DAMPING; ION ACOUSTIC WAVES; IONS; LAGRANGIAN FUNCTION; MAGNETIC FLUX COORDINATES; MASS NUMBER; NUMERICAL ANALYSIS; OSCILLATIONS; PLASMA IMPURITIES; PLASMA SIMULATION