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Title: Numerical studies of electron cyclotron wave current drive on HL-2A tokamak

The electron cyclotron wave (ECW) current drive (CD) for the HL-2A tokamak is investigated numerically with a new ray-tracing and Fokker-Planck code. The code is benchmarked with other well-tested linear and quasilinear codes and is then used to study the electron cyclotron current drive on the HL-2A tokamak. The wave propagation, power deposition, and driven-current profiles are presented. The effect of electron trapping is also assessed. It is found that quasilinear effects are negligible at the present ECW power levels and that when both waves are injected at an angle of 20° on the plasma equatorial plane, the CD efficiency for the HL-2A saturates at ∼0.029 × 10{sup 20 }A/W/m{sup 2} and ∼0.020 × 10{sup 20 }A/W/m{sup 2} for the 0.5 MW/68 GHz first harmonic ordinary (O1) and 1 MW/140 GHz second harmonic extraordinary (X2) modes, respectively. The effects of the plasma density, temperature, and wave-launching position on the driven current are also investigated analytically and numerically.
Authors:
;  [1] ; ; ;  [2] ;  [3] ;  [4]
  1. School of Nuclear Science and Technology, University of South China, Hengyang, Hunan 421001 (China)
  2. Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041 (China)
  3. School of Environmental Protection and Safety Engineering, University of South China, Hengyang, Hunan 421001 (China)
  4. School of Mathematics and Physics, University of South China, Hengyang, Hunan 421001 (China)
Publication Date:
OSTI Identifier:
22490934
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 6; Other Information: (c) 2015 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; BENCHMARKS; DEPOSITION; ECR CURRENT DRIVE; EFFICIENCY; ELECTRON TEMPERATURE; FOKKER-PLANCK EQUATION; GHZ RANGE; HL-2A TOKAMAK; ION TEMPERATURE; NUMERICAL ANALYSIS; PLASMA DENSITY; TRAPPED ELECTRONS; WAVE PROPAGATION