Enhanced betatron radiation in strongly magnetized plasma

被引：2
作者：
Pan, K. Q. [1 ,2 ]
Zheng, C. Y. [1 ,2 ,3 ]
Cao, L. H. [1 ,3 ,4 ]
Liu, Z. J. [3 ]
He, X. T. [1 ,2 ,3 ]
机构：
[1] Peking Univ, Ctr Appl Phys & Technol, Beijing 100871, Peoples R China
[2] Shanghai Jiao Tong Univ, Collaborat Innovat Ctr IFSA CICIFSA, Shanghai 200240, Peoples R China
[3] Inst Appl Phys & Computat Math, Beijing 100088, Peoples R China
[4] Peking Univ, Minist Educ, Key Lab High Energy Dens Phys Simulat, Beijing 100871, Peoples R China
来源：
PHYSICS OF PLASMAS | 2016年 / 23卷 / 04期
基金：
中国国家自然科学基金;
关键词：
TERAHERTZ RADIATION; INSTABILITY; GENERATION;
D O I：
10.1063/1.4947545
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：
Betatron radiation in strongly magnetized plasma is investigated by two dimensional (2D) particle-in-cell (PIC) simulations. The results show that the betatron radiation in magnetized plasmas is strongly enhanced and is more collimated compared to that in unmagnetized plasma. Single particle model analysis shows that the frequency and the amplitude of the electrons's betatron oscillation are strongly influenced by the axial external magnetic field and the axial self-generated magnetic field. And the 2D PIC simulation shows that the axial magnetic field is actually induced by the external magnetic field and tends to increase the betatron frequency. By disturbing the perturbation of the plasma density in the laser-produced channel, the hosing instability is also suppressed, which results in a better angular distribution and a better symmetry of the betatron radiation. Published by AIP Publishing.
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页数：5
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