Central electron temperature enhancements due to sawtooth stabilization during counter electron cyclotron current drive in Tokamak a Configuration Variable

被引:14
|
作者
Pietrzyk, ZA [1 ]
Angioni, C [1 ]
Behn, R [1 ]
Coda, S [1 ]
Goodman, TP [1 ]
Henderson, MA [1 ]
Hofmann, F [1 ]
Hogge, JP [1 ]
Moret, JM [1 ]
Pochelon, A [1 ]
Reimerdes, H [1 ]
Sauter, O [1 ]
Weisen, H [1 ]
机构
[1] Ecole Polytech Fed Lausanne, Assoc Euratom Confederat Suisse, Ctr Rech Phys Plasmas, CH-1015 Lausanne, Switzerland
关键词
D O I
10.1063/1.874141
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
In the Tokamak a Configuration Variable (TCV), the central electron temperature obtained in discharges with counter (CNTR) electron cyclotron current drive (ECCD) is larger than with CO-ECCD or electron cyclotron resonance heating (ECRH) alone. Comparison of experimental results with calculations by the transport code PRETOR [IAEA Technical Conference on Advances in Simulation and Models of Thermonuclear Plasmas. Montreal 142 (International Atomic Energy Agency, Vienna 1992)] indicates that sawtooth stabilization is responsible for the increased confinement time and the attendant twofold enhancement of the central temperature. Sawtooth stabilization is caused in turn by the central safety factor q(0) rising above 1 for CNTR-ECCD; by contrast, the simulation results show that q(0)< 1 in the sawtoothing CO-ECCD and ECRH cases. (C) 2000 American Institute of Physics. [S1070-664X(00)03907-0].
引用
收藏
页码:2909 / 2914
页数:6
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