On the feasibility to achieve high pressures with disk EMG driven impacting liners

Devices for producing 10-30 Mbar pressures in cylindrical targets of /spl sim/1 cm radius would be unique tools to study material properties under extreme conditions for a variety of research and application purposes. The paper presents results of theoretical and computational studies demonstrating the feasibility of this. The multi-module disk EMG themselves and especially those with an electrically exploded opening switch developed by VNIIEF are shown to be able to ensure the required acceleration of solid impacting liners, e.g., two-layered liners made of aluminum (on the outside) and molybdenum or tungsten (inside), up to 15-20 km/s velocities. The impacting liners optimal in their match to two considered energy sources have radii from /spl sim/7 cm to /spl sim/3 cm for targets of /spl sim/1 cm radius. Results of 2D magnetohydrodynamic liner compression computations are also presented, according to which the 2D effects of the liner interaction with end components may not lead to considerable violations of the desired 1D pattern of the liner impact on the target.