Computational Study of Magnetic Field Amplification in Laser-Produced Shock Waves Relevant to Supernova Remnants

8th International Conference on Inertial Fusion Sciences and Applications

Ishii, Ayako^1 ; Kishita, Shiori^1 ; Ohnishi, Naofumi^1 ; Kuramitsu, Yasuhiro^2,3 ; Morita, Taichi^3 ; Sakawa, Youichi^3 ; Takabe, Hideaki^3

Department of Aerospace Engineering, Tohoku University, Sendai

980-8579, Japan^1

Department of Physics, National Central University, Taoyuan

320, Taiwan^2

Institute of Laser Engineering, Osaka University, Suita

565-0871, Japan^3

关键词: Accelerating fields;    Computational studies;    Contact discontinuities;    Experimental conditions;    Laboratory astrophysics;    Magnetic field amplification;    Radiation hydrodynamics;    Richtmyer Meshkov instability;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/688/1/012035/pdf
DOI  :  10.1088/1742-6596/688/1/012035

来源: IOP

【 摘 要 】

We have developed a two-dimensional magneto-radiation hydrodynamics code with an induction equation solver to analyze laboratory-astrophysics experiments relevant to a supernova remnant (SNR) environment. The computed magnetic field was amplified by a order of magnitude from the background level as expected for accelerating fields of cosmic rays in the SNR context. A part of the amplification of the magnetic field is caused by Richtmyer-Meshkov instability (RMI) that stretches a contact discontinuity. However, the maximum magnetic field is smaller than the theoretically predicted limit since the non-linear RMI cannot sufficiently grow and the field is amplified by the compression effect rather than the stretching in the present experimental condition.