Collisionless pitch-angle scattering of runaway electrons

被引：15

作者：

Liu, Jian ^{[1
,2
,3
]}

Wang, Yulei ^{[1
,2
,3
]}

Qin, Hong ^{[1
,2
,4
]}

机构：

[1] Univ Sci & Technol China, Sch Nucl Sci & Technol, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China

[3] Chinese Acad Sci, Key Lab Geospace Environm, Hefei 230026, Anhui, Peoples R China

[4] Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA

来源：

NUCLEAR FUSION | 2016年 / 56卷 / 06期

基金：

中国国家自然科学基金;

关键词：

runaway electron; neoclassical scattering; pitch-angle scattering; volume-preserving algorithm; energy limit; gyro-center model; toroidal geometry; SYNCHROTRON-RADIATION; CURRENT TERMINATION; TOKAMAK; DISRUPTIONS; GENERATION; PLASMAS; TEXTOR; JET; ACCELERATION; DISCHARGES;

D O I：

10.1088/0029-5515/56/6/064002

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：

It is discovered that the tokamak field geometry generates a toroidicity induced broadening of the pitch-angle distribution of runaway electrons. This collisionless pitch-angle scattering is much stronger than the collisional scattering and invalidates the gyro-center model for runaway electrons. As a result, the energy limit of runaway electrons is found to be larger than the prediction of the gyro-center model and to depend heavily on the background magnetic field.

引用

页数：7

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