Toroidal Alfven eigenmodes in TFTR deuterium-tritium plasmas

被引：35

作者：

Nazikian, R ^{[1
]}

Fu, GY ^{[1
]}

Chang, Z ^{[1
]}

Batha, SH ^{[1
]}

Berk, H ^{[1
]}

Budny, RV ^{[1
]}

Chen, Y ^{[1
]}

Cheng, CZ ^{[1
]}

Darrow, DS ^{[1
]}

Gorelenkov, NN ^{[1
]}

Levinton, FM ^{[1
]}

Medley, S ^{[1
]}

Petrov, MP ^{[1
]}

Redi, M ^{[1
]}

Ruskov, E ^{[1
]}

Spong, DA ^{[1
]}

White, RB ^{[1
]}

Zweben, SJ ^{[1
]}

机构：

[1] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

来源：

PHYSICS OF PLASMAS | 1998年 / 5卷 / 05期

关键词：

D O I：

10.1063/1.872818

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：

Purely alpha-particle-driven toroidal Alfven eigenmodes (TAEs) with toroidal mode numbers n = 1-6 have been observed in deuterium-tritium (D-T) plasmas on the tokamak fusion test reactor [D. J. Grove and D. M. Meade, Nucl. Fusion 25, 1167 (1985)]. The appearance of mode activity following termination of neutral beam injection in plasmas with q(0)>1 is generally consistent with theoretical predictions of TAE stability [G. Y. Fu et al. Phys. Plasmas 3, 4036 (1996)]. Internal reflectometer measurements of TAE activity is compared with theoretical calculations of the radial mode structure. Core localization of the modes to the region of reduced central magnetic shear is confirmed, however the mode structure can deviate significantly from theoretical estimates. The peak measured TAE amplitude of delta n/n similar to 10(-4) at r/a similar to 0.3-0.4 corresponds to delta B/B similar to 10(-5), while delta B/B similar to 10(-8) is measured at the plasma edge. Enhanced alpha particle lass associated with TAE activity has not been observed. (C) 1998 American Institute of Physics.

引用

页码：1703 / 1711

页数：9

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