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A Demonstration of Extracting the Strength and Wavelength of the Magnetic Field Generated by Weibel Instability from the Proton Radiography

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摘要

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

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作者单位:

    Institute of Applied Physics and Computational Mathematics
    Shanghai Jiao Tong University
    Institute of Applied Physics and Computational Mathematics
    Institute of Applied Physics and Computational Mathematics
    Shanghai Jiao Tong University
    China Academy of Engineering Physics

引用该论文

Du Bao,Cai Hongbo,Zhang Wenshuai,Zou Shi-Yang,Chen(陈京) Jing,Zhu Shao-ping. A Demonstration of Extracting the Strength and Wavelength of the Magnetic Field Generated by Weibel Instability from the Proton Radiography[J].High Power Laser Science and Engineering,,():.