Modeling of the Hawk Dense Plasma Focus (DPF) Device Using USIM

We compare MHD simulation results to experimental measurements taken from a dense plasma focus driven by the HAWK pulsed-power generator (0.65 MA peak current,
$1.2\mu \mathrm{s}$
rise time). USim is a 3D capable, fluid plasma modeling framework that simulates the dynamics of charged fluids using the two temperature MHD equations, among others. The DPF device is modeled using an unstructured mesh, and initial conditions are applied to account for plasma injected radially inward by 3 Marshall guns, as well as additional mass injected by an on-axis gas puff valve. The non-axisymmetric nature of the Marshall guns means that full 3D simulations are required. The initial plasma and gas density profiles were varied to determine their effect on the pinch parameters. Simulated current, voltage, inductance and neutron yield are compared with experimental results. We also calculate simulated end-on optical imaging using multiple opacity models and compare with experiment.