Hydrodynamic motion of electron beam heated warm dense foils*

Foils of Al, Ti, Ni, and Cu are heated isochorically by an electron bunch with ~100 ns pulse length, energy of 19.8 MeV and current of 1.7 kA. The electron bunch is focused to a spot size of ~2 mm onto each foil. The corresponding hydrodynamic motion of the foils is measured instantaneously once electron energy deposition begins with Photonic Doppler Velocimetry (PDV).  PDV provides a measurement of the foil velocity, inferred pressure within the foil, and hydrodynamic disassembly time.  Electron energy deposition into these foils was simulated utilizing a new capability in the HELIOS-CR code. Simulated results of velocity and plasma pressure profiles of the various foils are compared with LASNEX simulations and experimental measurements.