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Title: Electromagnetic effects on geodesic acoustic modes

By using the full electromagnetic drift kinetic equations for electrons and ions, the general dispersion relation for geodesic acoustic modes (GAMs) is derived incorporating the electromagnetic effects. It is shown that m = 1 harmonic of the GAM mode has a finite electromagnetic component. The electromagnetic corrections appear for finite values of the radial wave numbers and modify the GAM frequency. The effects of plasma pressure β{sub e}, the safety factor q, and the temperature ratio τ on GAM dispersion are analyzed.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [4] ;  [7]
  1. Salam Chair in Physics, G. C. University Lahore, Katchery Road, Lahore 54000 (Pakistan)
  2. (Pakistan)
  3. University of Saskatchewan, 116 Science Place, Saskatoon S7N 5E2 (Canada)
  4. (Russian Federation)
  5. Institute of Physics, University of São Paulo, São Paulo 05508-090 (Brazil)
  6. Institute of Tokamak Physics, NRC “Kurchatov Institute,” 123182 Moscow (Russian Federation)
  7. Visiting Professor, Department of Physics, Quaid-e-Azam University, Islamabad (Pakistan)
Publication Date:
OSTI Identifier:
22303776
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 8; Other Information: (c) 2014 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; CORRECTIONS; DISPERSION RELATIONS; DISPERSIONS; ELECTRONS; KINETIC EQUATIONS; PLASMA PRESSURE; SAFETY