Capabilities of Explosive Magnetic Generators for Precision Research of Equations-of-State at Isentropic Compression

The method to study the isentropic compressibility of substances is presented in [1]. A two-layered liner made of an explored material specimen and of an outer current-carrying aluminum tube is driven by the current of Z-machine. Another aluminum liner serves as an anode. The measurements of velocity of the specimen' inner surface and of the anode' outer surface are necessary in the iterative method. In combination with magnetohydrodynamic modeling and mathematical optimization this allows obtaining current, pressure and density in the specimen. Copper was compressed by the pressure of ~ 1000 GPa. The accuracy of pressure determination is 5.7% and of density determination is 1.8%. The capabilities of the disk explosive magnetic generators to conduct similar research are analyzed.

I. Introduction

A wide range of studies is realized on powerful electrophysical facilities to study the properties of materials under shock and shock-free loading. One of the interesting research directions is to get isentropic compression of substances at ultra-high pressures.