Damping of relativistic electron beams by synchrotron radiation

被引:73
作者
Andersson, F [1 ]
Helander, P
Eriksson, LG
机构
[1] Chalmers Univ Technol, Dept Electromagnet, S-41296 Gothenburg, Sweden
[2] EURATOM VR Assoc, Gothenburg, Sweden
[3] UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England
[4] CEA Cadarache, EURATOM Assoc, CEA Fus, St Paul Les Durance, France
关键词
D O I
10.1063/1.1418242
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
Relativistic electrons emit synchrotron radiation due to their gyro- and guiding-center motions in a curved magnetic field. In this article, the kinetic theory of relativistic electron beams is developed to account for radiation reaction by including the Abraham-Lorentz reaction force in the kinetic equation. As an application of this theory, the dynamics of runaway electrons is examined and a steady-state solution is constructed describing a balance between acceleration by the electric field, pitch-angle scattering, and radiation reaction. Furthermore, it is found that a beam of relativistic electrons can be slowed down by the combined effects of pitch-angle scattering and radiation reaction. This damping can be more efficient than ordinary collisional drag, and appears to explain the decay of post-disruption runaway currents in the Joint European Torus (JET) [R. D. Gill, Nucl. Fusion 33, 1613 (1993)]. (C) 2001 American Institute of Physics.
引用
收藏
页码:5221 / 5229
页数:9
相关论文
共 17 条
[2]   Fokker-Planck simulations of knock-on electron runaway avalanche and bursts in tokamaks [J].
Chiu, SC ;
Rosenbluth, MN ;
Harvey, RW ;
Chan, VS .
NUCLEAR FUSION, 1998, 38 (11) :1711-1721
[3]   RELATIVISTIC LIMITATIONS ON RUNAWAY ELECTRONS [J].
CONNOR, JW ;
HASTIE, RJ .
NUCLEAR FUSION, 1975, 15 (03) :415-424
[4]   ELECTRON AND ION RUNAWAY IN A FULLY IONIZED GAS .2. [J].
DREICER, H .
PHYSICAL REVIEW, 1960, 117 (02) :329-342
[5]   ELECTRON AND ION RUNAWAY IN A FULLY IONIZED GAS .1. [J].
DREICER, H .
PHYSICAL REVIEW, 1959, 115 (02) :238-249
[6]   SEPARATING VARIABLES IN 2-WAY DIFFUSION-EQUATIONS [J].
FISCH, NJ ;
KRUSKAL, MD .
JOURNAL OF MATHEMATICAL PHYSICS, 1980, 21 (04) :740-750
[7]  
Fleischmann H. H., 1993, PPPL2914
[8]   GENERATION AND LOSS OF RUNAWAY ELECTRONS FOLLOWING DISRUPTIONS IN JET [J].
GILL, RD .
NUCLEAR FUSION, 1993, 33 (11) :1613-1625
[9]  
GUREVICH AV, 1961, ZH EKSP TEOR FIZ, V12, P904
[10]   Suppression of runaway electron avalanches by radial diffusion [J].
Helander, P ;
Eriksson, LG ;
Andersson, F .
PHYSICS OF PLASMAS, 2000, 7 (10) :4106-4111