EFFECT OF ASPECT RATIO ON MAGNETIC-FIELD FLUCTUATIONS IN THE REVERSED-FIELD PINCH

被引：33
|
作者：
HO, YL [1 ]
SCHNACK, DD [1 ]
NORDLUND, P [1 ]
MAZUR, S [1 ]
SATHERBLOM, HE [1 ]
SCHEFFEL, J [1 ]
DRAKE, JR [1 ]
机构：
[1] ROYAL INST TECHNOL, ALFVEN LAB, EURATOM ASSOC NFR, DIV FUS PLASMA PHYS, S-10044 STOCKHOLM, SWEDEN
来源：
PHYSICS OF PLASMAS | 1995年 / 2卷 / 09期
关键词：
D O I：
10.1063/1.871122
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 effect of aspect ratio on magnetic field fluctuations in reversed-field pinches is investigated using a three-dimensional magnetohydrodynamic code. Configurations with aspect ratios of 1.1, 2.2, and 4.4 are modeled. The results are extrapolated to aspect ratio 8.8 for comparison with the Extrap T1 experiment [Nucl. Fusion 34, 427 (1994)]. It is found that the average modal amplitudes decrease with aspect ratio. However, the spectrum broadens correspondingly, resulting in negligible effect on the magnetic fluctuation level. The computed spectrum dynamics are found to be in good agreement with experimental observations on the T1 experiment. Quantitative evaluations of the field line stochasticity indicate no dependence of the mean magnetic field diffusion rate on aspect ratio. (C) 1995 American Institute of Physics.
引用
收藏
页码：3407 / 3411
页数：5
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