A multi-point radial photonic Doppler velocimetry (PDV) diagnostic for cylindrical implosion experiments

Radial photonic Doppler velocimetry (PDV) has been successfully applied in cylindrical implosion experiments fielded on Sandia's Z accelerator. Magnetically driven cylinders have been diagnosed well beyond 20 km/s, using a ``leapfrog'' configuration to address the bandwidth limitations of currently available detectors and digitizers. Implosion symmetry is the latest question this diagnostic will attempt to answer. An innovative multi-point configuration is being developed to allow six concurrent measurements during each experiment. This presentation describes the implementation of radial PDV in this extreme environment. Sandia National Labs is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corp., for the U.S. Dept. of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000.