Gyrokinetic theory of turbulent acceleration and momentum conservation in tokamak plasmas

被引：0

作者：

王璐 ^{[1
]}

彭水涛 ^{[1
]}

P H DIAMOND ^{[2
]}

机构：

[1] International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Tech

[2] Center for Momentum Transport and Flow Organization and Center for Astrophysics and Space Sciences,University of California at San Diego

来源：

Plasma Science and Technology | 2018年 / 07期

关键词：

turbulent acceleration; intrinsic rotation; momentum conservation;

D O I：

暂无

中图分类号：

TL631.24 [];

学科分类号：

082701 ;

摘要：

Understanding the generation of intrinsic rotation in tokamak plasmas is crucial for future fusion reactors such as ITER. We proposed a new mechanism named turbulent acceleration for the origin of the intrinsic parallel rotation based on gyrokinetic theory. The turbulent acceleration acts as a local source or sink of parallel rotation, i.e., volume force, which is different from the divergence of residual stress, i.e., surface force. However, the order of magnitude of turbulent acceleration can be comparable to that of the divergence of residual stress for electrostatic ion temperature gradient(ITG) turbulence. A possible theoretical explanation for the experimental observation of electron cyclotron heating induced decrease of co-current rotation was also proposed via comparison between the turbulent acceleration driven by ITG turbulence and that driven by collisionless trapped electron mode turbulence. We also extended this theory to electromagnetic ITG turbulence and investigated the electromagnetic effects on intrinsic parallel rotation drive. Finally, we demonstrated that the presence of turbulent acceleration does not conflict with momentum conservation.

引用

页码：26 / 30

页数：5