Development of a Heterodyne Multiplexed Velocimetry Diagnostic for Isentropic Compression and High Energy Density Physics Experiments

The University of New Mexico is developing a Mutiplexed Heterodyne Photon Doppler Velocimetry diagnostic for use in isentropic as well as in High Energy Density Experiments. The diagnostic will be used to measure multipoint changes in material velocity due to pulsed power dynamic compression experiments on additive manufactured materials of interest to Inertial Confinement Fusion and provide data for Equation Of State development. This paper presents the initial development, configuration and characterization of this diganostic as well as initial results on 3d printed polymeric targets from commercial off the shelf printers. The diagnostic is comprised of single longitudinal mode 1550 nm laser, time multiplexed via a set of sf28 km long fiber delay lines coupled to Miteq and other photodetectors data is captured by a 20 GHz digitizer. The shifted second wavelength for the heterodyne effect is generated by an Acousto Optic Modulator operating near 1550nm. As well as results from various resin density samples data will also be shown for charged particle beam characterization experiments. The pulsed power driver for these loads is the Lobo LTD coincidently presented at this conference.