Measurement of runaway electron energy distribution function during high-Z gas injection into runaway electron plateaus in DIII-D

被引：57

作者：

Hollmann, E. M. ^{[1
]}

Parks, P. B. ^{[2
]}

Commaux, N. ^{[3
]}

Eidietis, N. W. ^{[2
]}

Moyer, R. A. ^{[1
]}

Shiraki, D. ^{[3
]}

Austin, M. E. ^{[4
]}

Lasnier, C. J. ^{[5
]}

Paz-Soldan, C. ^{[2
]}

Rudakov, D. L. ^{[1
]}

机构：

[1] Univ Calif San Diego, La Jolla, CA 92093 USA

[2] Gen Atom Co, San Diego, CA 92186 USA

[3] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[4] Univ Texas Austin, Inst Fus Studies, Austin, TX 78712 USA

[5] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

来源：

PHYSICS OF PLASMAS | 2015年 / 22卷 / 05期

关键词：

AVALANCHE;

D O I：

10.1063/1.4921149

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 evolution of the runaway electron (RE) energy distribution function f(epsilon) during massive gas injection into centered post-disruption runaway electron plateaus has been reconstructed. Overall, f(epsilon) is found to be much more skewed toward low energy than predicted by avalanche theory. The reconstructions also indicate that the RE pitch angle theta is not uniform, but tends to be large at low energies and small theta similar to 0.1-0.2 at high energies. Overall power loss from the RE plateau appears to be dominated by collisions with background free and bound electrons, leading to line radiation. However, the drag on the plasma current appears to be dominated by collisions with impurity ions in most cases. Synchrotron emission appears not to be significant for overall RE energy dissipation but may be important for limiting the peak RE energy. (C) 2015 AIP Publishing LLC.

引用

页数：9

共 26 条

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