Nonlinear diffusion waves in high magnetic fields

30th International Conference on Interaction of Intense Energy Fluxes with Matter

Oreshkin, V.I.^1,2 ; Chaikovsky, S.A.^1 ; Labetskaya, N.A.^1 ; Datsko, I.M.^1 ; Rybka, D.V.^1 ; Ratakhin, N.A.^1 ; Khishchenko, K.V.^3

Institute of High Current Electronics, Siberian Branch, Russian Academy of Sciences, Akademichesky Avenue 2/3, Tomsk

634055, Russia^1

National Research Tomsk Polytechnical University, Lenin Avenue 30, Tomsk

634050, Russia^2

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13, Moscow

125412, Russia^3

关键词: Current rise time;    Electrical explosion;    High magnetic fields;    High-current generator;    Large-scale instability;    Nonlinear diffusion;    Nonlinear diffusion waves;    Thermal instabilities;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/653/1/012143/pdf
DOI  :  10.1088/1742-6596/653/1/012143

来源: IOP

【 摘 要 】

The nonlinear diffusion of a magnetic field and the large-scale instabilities arising upon an electrical explosion of conductors in a superstrong (2-3 MG) magnetic field were investigated experimentally on the MIG high-current generator (up to 2.5 peak current, 100 ns current rise time). It was observed that in the nonlinear stage of the process, the wavelength of thermal instabilities (striations) increased with a rate of 1.5-3 km/s.