Self-driven current generation in turbulent fusion plasmas

被引：14

作者：

Wang, W. X. ^{[1
]}

Hahm, T. S. ^{[2
]}

Startsev, E. A. ^{[1
]}

Ethier, S. ^{[1
]}

Chen, J. ^{[1
]}

Yoo, M. G. ^{[1
]}

Ma, C. H. ^{[1
]}

机构：

[1] Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA

[2] Seoul Natl Univ, Dept Nucl Engn, Seoul 08826, South Korea

来源：

NUCLEAR FUSION | 2019年 / 59卷 / 08期

关键词：

plasma self-driven current; current drive; plasma turbulence and transport; magnetic confinement fusion; nonlinear phenomena in plasmas; BOOTSTRAP CURRENT; TRANSPORT; DYNAMO;

D O I：

10.1088/1741-4326/ab266d

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Global gyrokinetic simulations with self-consistent coupling of neoclassical and turbulent dynamics show that turbulence can significantly affect plasma self-driven mean current generation in tokamaks. The current amplitude, profile and associated phase space structures can all be modified. Turbulence can significantly reduce the current generation in the collisionless regime, generate current profile corrugation near the rational magnetic surface and nonlocally drive current in the linearly stable region-all these are expected to have a radical impact on broad tokamak physics. Both electron parallel acceleration and residual stress from turbulence play crucial roles in turbulence-induced current generation.

引用

页数：7

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