A disk EMG system for driving impacting liners to ∼ 20 km/s

We consider an ALT-1,2-like [1,2] system to deliver up to 60-70 MA currents in the liner load and accelerate ~20 g/cm cylindrical liners to ~20 km/s (ALT-1,2: ~31 MA, ~13 g/cm, ~12 km/s). The system is intended for the ALT-3 experiment to test the efficiency of magnetic implosion of impacting liners and to verify the possibility of shock-wave measurements at up to 1 TPa pressures. We describe the physical configuration of the system and its diagnostic suite, which differ significantly from similar systems [3,4]. As compared with [4], changes are made to the physical configuration of individual system units and a number of system parameters: we increase load inductance by a factor of 1.5, use a We consider an ALT-1,2-like [1,2] system to deliver up to 60-70 MA currents in the liner load and accelerate ~20 g/cm cylindrical liners to ~20 km/s (ALT-1,2: ~31 MA, ~13 g/cm, ~12 km/s). The system is intended for the ALT-3 experiment to test the efficiency of magnetic implosion of impacting liners and to verify the possibility of shock-wave measurements at up to 1 TPa pressures. We describe the physical configuration of the system and its diagnostic suite, which differ significantly from similar systems [3,4]. As compared with [4], changes are made to the physical configuration of individual system units and a number of system parameters: we increase load inductance by a factor of 1.5, use a different transmission line and an AI liner (instead of envisaged two-layer liners) etc. Simulated characteristics of the system are presented.different transmission line and an AI liner (instead of envisaged two-layer liners) etc. Simulated characteristics of the system are presented.

I. INTRODUCTION

Magnetic implosion of cylindrical liners in the Z-pinch geometry is of interest for high energy density physics, in particular, for producing terapascal shock pressures in various materials [1]–[4]. Pulsed power drivers based on disk explosive magnetic flux compression generators (DEMG) with electrically exploded fuse opening switches (FOS), similar to the systems used in the previous experiments, can deliver up to 60–70 MA currents with a characteristic rise time of , which makes it possible to accelerate up to g/cm liners to km/s[2]–[4]. Al and two-layer liners are considered, which, as predicted by ID simulations, can produce up to 1–3 TPa shock pressures, when accelerated to the above velocities [3], [4].