Megabar Isentropic Compression Experiments (ICE) using High Explosive Pulsed Power (HEPP)

2018-10-18T08:04:24Z (GMT) by Douglas G. Tasker
In the shock physics community there is significant interest in the acquisition of accurate isentropic Equation of State (EOS) data at megabar pressures (i.e. at ≈50 GPa and above). A relatively new technique, called the Isentropic Compression Experiment or ICE, uses rapidly rising magnetic fields to compress materials to high stresses of the order of 50 GPa and above over a few hundred nanoseconds. This work was first performed on the Z-machine at the Sandia National Laboratory in Albuquerque, NM, USA. Using ICE, the Sandia researchers were able to obtain relatively accurate EOS data at large stresses in a planar geometry. This thesis describes the explosive pulsed power (HEPP) version of the ICE method, which employs a simple and compact HEPP apparatus. Every aspect of the HEPP–ICE work is presented, from theory to component development, to experimentation and data analysis. [Continues.]