Drift-wave fluctuation in an inviscid tokamak plasma

doi:10.1088/1674-1056/22/11/115203

Abstract In order to describe the characterization of resistive drift-wave fluctuation in a tokamak plasma, a coupled inviscid two-dimensional Hasegawa–Wakatani model is investigated. Two groups of new analytic solutions with and without phase shift between the fluctuant density and the fluctuant potential are obtained by using the special function transformation method. It is demonstrated that the fluctuant potential shares similar spatio–temporal variations with the density. It is found from the solutions without phase shift that the effect of the diffusion and adiabaticity on the fluctuant density is quite complex, and that the fluctuation may be controlled through the adiabaticity and diffusion. By using the typical parameters in the quasi-adiabatic regime in the solutions with phase shift, it is shown that the density gradient becomes larger as the contours become dense toward the plasma edge and the contours have irregular structures, which reveal the nonuniform distribution in the tokamak edge.

Keywords: tokamak plasma Hasegawa–Wakatani model drift-wave fluctuation

Received: 01 April 2013
Revised: 20 June 2013
Accepted manuscript online:

PACS:	52.35.Mw	(Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.))
	52.35.Kt	(Drift waves)
	52.25.-b	(Plasma properties)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10905038, 11275123, and 11365017), the National ITER Plans Program of China (Grant No. 2009GB105002), and the Natural Science Foundation of Jiangxi Province, China (Grant Nos. 2008GZS0045 and 2009GZW0026).

Corresponding Authors: Tang Xiao-Yan
E-mail: xytang@sjtu.edu.cn

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Yang Jian-Rong (杨建荣), Mao Jie-Jian (毛杰健), Tang Xiao-Yan (唐晓艳) Drift-wave fluctuation in an inviscid tokamak plasma 2013 Chin. Phys. B 22 115203

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