Correlation between Electron Transport and Shear Alfven Activity in the National Spherical Torus Experiment

被引：72
|
作者：
Stutman, D. [1 ]
Delgado-Aparicio, L. [1 ]
Gorelenkov, N. [2 ]
Finkenthal, M. [1 ]
Fredrickson, E. [2 ]
Kaye, S. [2 ]
Mazzucato, E. [2 ]
Tritz, K. [1 ]
机构：
[1] Johns Hopkins Univ, Baltimore, MD 21218 USA
[2] Princeton Univ, Princeton, NJ 08543 USA
来源：
PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 11期
关键词：
MODE DISCHARGES; ASPECT-RATIO; TURBULENCE; PLASMAS; CONFINEMENT; PHYSICS; DEVICE;
D O I：
10.1103/PhysRevLett.102.115002
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report the observation of a correlation between shear Alfven eigenmode activity and electron transport in plasma regimes where the electron temperature gradient is flat, and thus the drive for temperature gradient microinstabilities is absent. Plasmas having rapid central electron transport show intense, broadband global Alfven eigenmode (GAE) activity in the 0.5-1.1 MHz range, while plasmas with low transport are essentially GAE-free. The first theoretical assessment of a GAE-electron transport connection indicates that overlapping modes can resonantly couple to the bulk thermal electrons and induce their stochastic diffusion.
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页数：4
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