Explosive magnetic liner devices to produce shock pressures up to 3 TPa

The paper discusses devices with a Disk Explosive Magnetic flux compression Generator (DEMG), which are similar to the ALT-1,2 experimental devices and are intended for testing the possibility of producing 1-3 TPa (10-30 Mbar) pressures and the possibility of measuring Hugoniots of different materials at such pressures. It is expected that two-layer, cylindrical liners, Al+Fe and/or Al+W, will be used, driven by 4-5 MG magnetic fields to ~ 20 km/s velocities. The paper presents and discusses simulated characteristics of these devices, in which currents, energies and powers delivered to the liner load can reach ~ 70 MA, ~ 40 MJ and ~ 20 TW and exceed those in the ALT-1,2 devices by a factor of ~2, ~ 4 and ~ 7, respectively.

I INTRODUCTION

Electromagnetic implosion of cylindrical condensed liners (azimuthal magnetic field ) is of great interest for high energy density physics, in particular, for the generation of terapascal pressures and measurements of Hugoniots of materials at such pressures, see e.g. [1], , , , , , [7]. Pulsed power systems based on Disc Explosive Magnetic flux compression Generators (DEMG) deliver particularly high currents to the liner load. The use of an electrically exploded foil opening switch (FOS) in such systems reduces the effective rise time of current in the liners down to , which allows accelerating liners with a mass of 50 g (~13g/cm) and more to ~20 km/s or higher velocities [3], [7]. We consider cylindrical Al liners and two-layer liners, whose current carrying Al layers interface with internal layers of higher-density materials (Fe, Mo, W, …), which at such velocities are capable of producing shock pressures up to 1–3 TPa in different materials [1], [3], [7].