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
收藏
页数：7
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