Modeling rate dependent phase transitions in isentropically compressed Bi and Fe

Experiments are underway at the Janus laser to study phase transitions in isentropically compressed samples of Bi and Fe attached to windows of LiF or sapphire. The target is loaded with a ramped laser ICE drive. The velocity history of the sample-window interface is recorded using line VISAR. The response of the targets is modeled by evolving the 1D Euler equations using a drive deduced by back integration from shots performed with Al samples. Multiphase EOS models are used for the sample, and rate dependence is implemented with the Andrews-Hayes equations.