Observation of velocity-independent electron transport in the reversed field pinch

被引：33
作者：
O'Connell, R
Hartog, DJD
Forest, CB
Anderson, JK
Biewer, TM
Chapman, BE
Craig, D
Fiksel, G
Prager, SC
Sarff, JS
Terry, SD
Harvey, RW
机构：
[1] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
[2] CompX, San Diego, CA USA
来源：
PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 04期
关键词：
D O I：
10.1103/PhysRevLett.91.045002
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Confinement of runaway electrons has been observed for the first time in a reversed field pinch during improved-confinement plasmas in the Madison Symmetric Torus. Energy-resolved hard-x-ray flux measurements have been used to determine the velocity dependence of the electron diffusion coefficient, utilizing computational solutions of the Fokker-Planck transport equation. With improved-confinement, the fast electron diffusivity drops by 2 orders of magnitude and is independent of velocity. This suggests a change in the transport mechanism away from stochastic magnetic field diffusion.
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页数：4
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