Fast wave current drive in low aspect ratio tokamaks

被引：6

作者：

Chiu, SC ^{[1
]}

Chan, VS ^{[1
]}

Miller, RL ^{[1
]}

Lin-Liu, YR ^{[1
]}

Mau, TK ^{[1
]}

机构：

[1] Gen Atom Co, San Diego, CA 92138 USA

来源：

NUCLEAR FUSION | 1997年 / 37卷 / 11期

关键词：

D O I：

10.1088/0029-5515/37/11/I02

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：

The magnetic field of a low aspect ratio tokamak (LART) deviates rather significantly from the approximately 1/R dependence of conventional tokamaks. The parameterization of current drive efficiency on the basis of conventional large aspect ratio tokamaks becomes inaccurate. The physics of high harmonic ion cyclotron fast wave current drive (FWCD) and low frequency FWCD in LARTs is examined using exact evaluations of the current drive efficiencies from the adjoint technique. The results indicate that the high harmonic ion cyclotron current drive cannot penetrate to the plasma core at the high beta values typical of LART reactors, and hence this scheme may only be applicable for off-axis steady state current drive, while the low frequency current drive penetrates well into the plasma core and is appropriate for on-axis current profile control. The implications for advanced scenarios of LART are discussed.

引用

页码：1515 / 1522

页数：8

共 17 条

[1] RADIO-FREQUENCY CURRENT GENERATION BY WAVES IN TOROIDAL GEOMETRY [J].