Results and Prospects of Material Strength Studies on Electrophysical Facilities Based on Perturbation Growth in Liner Systems

Data are presented describing refined simulations of perturbation growth in a three-layer cylindrical liner system tested with disk explosive magnetic flux compression generators (DEMGs) to study the strength properties of copper and polyethylene at shocklessly applied pressures of up to ~15 GPa. The calculated performance for the same liner system in the experiments to study the strength properties of copper at shockless loading of up to ~40-GPa pressures is presented. The feasibility of similar strength experiments with quasi-isentropic material compression to ~2000 GPa using DEMGs is demonstrated.

I. Introduction

Magnetically imploded cylindrical liners can be used to study dynamic shear strength of materials based on the growth of initial perturbations during the development of the Rayleigh–Taylor instability in liner systems [1]–[10]. High-current capacitor banks (Pegasus-2, Shiva Star, Atlas, peak currents ) and disk explosive magnetic flux compression generators (DEMGs) are capable of driving cylindrical liner systems to a wide range of material pressures from 1 GPa [2], [3] to hundreds of GPa [5].