A Global Equation of State for High Energy Density Physics

High energy density physics deals with behavior of matter under extreme conditions of pressure and temperature. Several fields of research involve high energy density: astrophysics, geophysics, inertial confinement fusion (ICF), explosive and impact loading of materials, Z-pinch devices, etc. All of these fields involve one common feature: i.e., concentration of an intense source of energy in a small region at a fast rate. This leads to hydrodynamic phenomena involving rapid motion of materials due to large pressure gradients generated inside the system [see Box 1]. Fig.1 depicts some typical regimes of energy density vs energy that occur in some of the situations. The DARHT facility is for explosive driven