LABORATORY SIMULATION OF THE DYNAMICS AND INSTABILITIES OF SPACE PLASMA CLOUDS EXPLODING IN MAGNETIZED BACKGROUND

摘要

By using a Laser-produced Plasma Clouds (LPC) and highly-ionized background plasma with magnetic field up to B_0=550 G at large-scale vacuum chamber (Φ1,2m) of KI-1 facility of ILP we have done a series of new simulative experiments to study main collisionless interaction processes between exploding plasmas and magnetized background in space. The prime goal of this work was investigation of the suppressing influence of H~+— background (with density n* up to 3/7·10~(13) cm~(-3)) on the development of non-MHD flute-like instability of LPC as the main feature of plasma-field interactions that determines all related processes of diamagnetic cavity formation, plasma deceleration and its further propagation across field. New data and model for the Hall-phenomenon of non-diffusive and anomalous field's penetration into LPC are presented and confirmed by its numerical simulation by novel 1D Hall-code of ILP.