Resolving runaway electron distributions in space, time, and energy

被引：34
作者：
Paz-Soldan, C. [1 ]
Cooper, C. M. [2 ]
Aleynikov, P. [3 ]
Eidietis, N. W. [1 ]
Lvovskiy, A. [2 ]
Pace, D. C. [1 ]
Brennan, D. P. [4 ]
Hollmann, E. M. [5 ]
Liu, C. [4 ]
Moyer, R. A. [5 ]
Shiraki, D. [6 ]
机构：
[1] Gen Atom Co, San Diego, CA 92186 USA
[2] Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA
[3] Max Planck Inst Plasma Phys, Greifswald, Germany
[4] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA
[5] Univ Calif San Diego, Energy Res Ctr, La Jolla, CA 92093 USA
[6] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
来源：
PHYSICS OF PLASMAS | 2018年 / 25卷 / 05期
关键词：
AVALANCHE; TOKAMAK;
D O I：
10.1063/1.5024223
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：
Areas of agreement and disagreement with present-day models of runaway electron (RE) evolution are revealed by measuring MeV-level bremsstrahlung radiation from runaway electrons (REs) with a pinhole camera. Spatially resolved measurements localize the RE beam, reveal energy-dependent RE transport, and can be used to perform full two-dimensional (energy and pitch-angle) inversions of the RE phase-space distribution. Energy-resolved measurements find qualitative agreement with modeling on the role of collisional and synchrotron damping in modifying the RE distribution shape. Measurements are consistent with predictions of phase-space attractors that accumulate REs, with non-monotonic features observed in the distribution. Temporally resolved measurements find qualitative agreement with modeling on the impact of collisional and synchrotron damping in varying the RE growth and decay rate. Anomalous RE loss is observed and found to be largest at low energy. Possible roles for kinetic instability or spatial transport to resolve these anomalies are discussed. Published by AIP Publishing.
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页数：12
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