GENERATION OF ULTRAFAST ELECTRONS BY SIMULTANEOUS STIMULATED RAMAN BACKWARD AND FORWARD SCATTERING

被引:36
作者
BERTRAND, P
GHIZZO, A
KARTTUNEN, SJ
PATTIKANGAS, TJH
SALOMAA, RRE
SHOUCRI, M
机构
[1] CTR CANADIEN FUS MAGNET,TOKAMAK VARENNES,VARENNES,PQ,CANADA
[2] TECH RES CTR FINLAND,NUCL ENGN LAB,SF-02150 ESPOO 15,FINLAND
[3] HELSINKI UNIV TECHNOL,DEPT TECH PHYS,SF-02150 ESPOO 15,FINLAND
来源
PHYSICAL REVIEW E | 1994年 / 49卷 / 06期
关键词
D O I
10.1103/PhysRevE.49.5656
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
Fast electron generation in stimulated Raman forward and backward scattering is investigated. The simultaneous forward and backward scattering is shown to create an electrostatic field structure which is exceptionally efficient in producing highly relativistic electrons. The Vlasov-Maxwell simulations reveal that the two plasma wave packets generated by the backward and forward scattering are spatially separated, and thus form a two-staged electron ''accelerator.'' The bulk electrons are accelerated from the lower boundary of the trapping region of the slower wave to the upper boundary of the trapping region of the faster wave. The mechanism of the electron acceleration is analyzed by Vlasov-Maxwell simulations with self-consistent fields and by test particle calculations with prescribed electrostatic fields.
引用
收藏
页码:5656 / 5659
页数:4
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