A demonstration of extracting the strength and wavelength of the magnetic field generated by the Weibel instability from proton radiography

作     者：Bao Du Hong-Bo Cai Wen-Shuai Zhang Shi-Yang Zou Jing Chen Shao-Ping Zhu 

作者机构：Institute of Applied Physics and Computational MathematicsBeijing 100094China HEDPSCenter for Applied Physics and TechnologyPeking UniversityBeijing 100871China IFSA Collaborative Innovation CenterShanghai Jiao Tong UniversityShanghai 200240China STPPLResearch Center of Laser FusionChina Academy of Engineering PhysicsMianyang 621900China Graduate SchoolChina Academy of Engineering PhysicsBeijing 100088China 

出 版 物：《High Power Laser Science and Engineering》 (高功率激光科学与工程（英文版）)

年 卷 期：2019年第7卷第3期

页      面：37-44页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：supported by the Science Challenge Project (No. TZ2016005) the National Natural Science Foundation of China (Nos. 11575030 and U1730449 (NSAF)) the National Key Programme for S&T Research and Development in China (No. 2016YFA0401100) 

主　　题：magnetic field plasma diagnostics proton radiography Weibel instability 

摘      要：The Weibel instability and the induced magnetic field are of great importance for both astrophysics and inertial confinement *** of the stochasticity of this magnetic field,its main wavelength and mean strength,which are key characteristics of the Weibel instability,are still unobtainable *** this paper,a theoretical model based on the autocorrelation tensor shows that in proton radiography of the Weibel-instability-induced magnetic field,the proton flux density on the detection plane can be related to the energy spectrum of the magnetic *** allows us to extract the main wavelength and mean strength of the two-dimensionally isotropic and stochastic magnetic field directly from proton radiography for the first *** calculations are conducted to verify our theory and show good consistency between pre-set values and the results extracted from proton radiography.