Filamentation due to the Weibel Instability in two counterstreaming laser ablated plasmas

9th International Conference on Inertial Fusion Sciences and Applications

Dong, Quan-Li^1 ; Yuan, Dawei^2,3 ; Gao, Lan^4 ; Liu, Xun^2 ; Chen, Yangao^4 ; Jia, Qing^4 ; Hua, Neng^5 ; Qiao, Zhanfeng^5 ; Chen, Ming^5 ; Zhu, Baoqiang^5 ; Zhu, Jianqiang^5 ; Zhao, Gang^3 ; Ji, Hantao^4 ; Sheng, Zheng-Ming^6 ; Zhang, Jie^6

School of Physics and Optoengineerings, Ludong University, Yantai

264025, China^1

Institute of Physics, CAS, Beijing

100190, China^2

National Astronomical Observatories, CAS, Beijing

100012, China^3

PPPL, Princeton University, Princeton

NJ

08543, United States^4

National Laboratory on High Power Lasers and Physics, Shanghai

201800, China^5

Key Laboratory for Laser Plasmas (MoE), Department of Physics, Shanghai Jiao Tong University, Shanghai

200240, China^6

关键词: Collisionless;    Filamentation;    Filamentation instabilities;    Laser spots;    Total energy;    Weibel instability;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/717/1/012061/pdf
DOI  :  10.1088/1742-6596/717/1/012061

来源: IOP

【 摘 要 】

Weibel-type filamentation instability was observed in the interaction of two counter streaming laser ablated plasma flows, which were supersonic, collisionless, and closely relevant to astrophysical conditions. The plasma flows were created by irradiating a pair of oppositely standing plastic (CH) foils with 1ns-pulsed laser beams of total energy of 1.7 kJ in two laser spots. With characteristics diagnosed in experiments, the calculated features of Weibel-type filaments are in good agreement with measurements.