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Title: Global particle simulation of lower hybrid wave propagation and mode conversion in tokamaks

Particle-in-cell simulation of lower hybrid (LH) waves in core plasmas is presented with a realistic electron-to-ion mass ratio in toroidal geometry. Due to the fact that LH waves mainly interact with electrons to drive the current, ion dynamic is described by cold fluid equations for simplicity, while electron dynamic is described by drift kinetic equations. This model could be considered as a new method to study LH waves in tokamak plasmas, which has advantages in nonlinear simulations. The mode conversion between slow and fast waves is observed in the simulation when the accessibility condition is not satisfied, which is consistent with the theory. The poloidal spectrum upshift and broadening effects are observed during LH wave propagation in the toroidal geometry.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [4]
  1. Fusion Simulation Center and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China)
  2. (United States)
  3. Department of Physics and Astronomy, University of California, Irvine, CA 92697 (United States)
  4. (China)
Publication Date:
OSTI Identifier:
22496219
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1689; Journal Issue: 1; Conference: 21. topical conference on radio frequency power in plasmas, Lake Arrowhead, CA (United States), 27-29 Apr 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ELECTRONS; GEOMETRY; IONS; KINETIC EQUATIONS; LOWER HYBRID CURRENT DRIVE; LOWER HYBRID HEATING; MODE CONVERSION; NONLINEAR PROBLEMS; PARTICLES; PLASMA; SIMULATION; SPECTRA; TOKAMAK DEVICES; WAVE PROPAGATION