文献类型：期刊文献

英文题名：Analysis of the polarization effects in the gyrokinetic theory of magnetized plasmas

作者：Zhang, Debing[1];Yu, Limin[1];Xue, Erbing[1];Zhang, Xianmei[1]

机构：[1]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2021

卷号：103

期号：1

外文期刊名：PHYSICAL REVIEW E

收录：;EI(收录号：20210509837257);WOS:【SCI-EXPANDED(收录号:WOS:000612141200014)】；

基金：One of the authors, D. Zhang, thanks Professor S. Wang for his helpful discussion about the velocity transformation between the GC and GY coordinates. This work was supported by the National Natural Science Foundation of China under Grants No. 12005063, No. 11875254, No. 11775265, and No. GG2030040320.

语种：英文

外文关键词：Quantum theory - Dispersion (waves) - Dispersions - Phase space methods - Distribution functions - Magnetoplasma

摘要：By adopting the hybrid coordinates, in which the nonlinearity of polarization displacement is included in the configuration space variables compared to the conventional gyrocenter coordinates, the polarization effects are analyzed by using the modern gyrokinetic (GK) theory of magnetized plasmas. Based on the invariant property, the velocity transformation between the gyrocenter and hybrid coordinates is calculated, and the phase-space velocity in terms of the hybrid coordinates is obtained. The linear and nonlinear polarization distribution functions are defined, and the evolutions for the polarization distribution functions are derived. It is well known that the polarization density is important in the GK calculation of particle density. Analogously, it is shown that the polarization current should be considered in the GK calculation of current density. In the case with electrostatic fluctuations, the roles of the polarization current are illustrated in the derivations of the Hasegawa-Mima equation and the dispersion relation for geodesic acoustic mode. In the case with magnetic fluctuations, the procedure for the GK calculation of perpendicular current is clarified, the dispersion relation for compressional Alfven wave is derived, in which the effect of polarization current is discussed.