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Author Li, J. C. ♦ Gong, X. Y. ♦ Dong, J. Q. ♦ Song, S. D. ♦ Gao, Q. D. ♦ Zheng, P. W. ♦ Du, D.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword 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
Abstract 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.
ISSN 1070664X
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-06-15
Publisher Place United States
Journal Physics of Plasmas
Volume Number 22
Issue Number 6


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