Implosion dynamics of wire-array z-pinches on the COBRA accelerator

ORAL

Abstract

Experimental results characterizing wire-array z-pinch implosion dynamics on the 1-MA, 100-ns rise time COBRA pulsed power generator are presented. Diagnostics fielded include an optical streak camera, a time-gated XUV framing camera, a laser shadowgraph system, filtered time-integrated pinhole cameras, a focusing x-ray spectrometer with spatial resolution (FSSR), a load voltage monitor, a faraday cup, a bolometer, silicon diodes and diamond photoconducting detectors (PCDs). The load geometries investigated in this set of experiments include cylindrical arrays ranging from 6 to 16 mm in diameter, and consisting of 8, 16, or 32 wires of either aluminum (Al) or tungsten (W). The data produced by the entire suite of diagnostics are analyzed and presented to provide an overall picture of implosion dynamics and timing on COBRA. In particular, data fitting to various implosion trajectory models, as well as x-ray pulse shape dependencies on various loads and implosion characteristics are presented and discussed.

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Authors

  • R. McBride

    Cornell University

  • Kate Bell

    Cornell University

  • I. Blesener

  • D.A. Chalenski

    Cornell University Laboratory of Plasma Studies, Cornell University

  • J. Douglass

    Cornell University

  • J. Greenly

    Cornell University Laboratory of Plasma Studies, Cornell University, Laboratory of Plasma Studies, Cornell University

  • P. Knapp

    Laboratory for Plasma Studies, Cornell University

  • S. Pikuz

  • T. Shelkovenko

  • T. Blanchard

  • H. Wilhelm

  • David Hammer

    Cornell University, Cornell University, Ithaca, NY

  • B. Kusse

    Cornell University, Cornell University Laboratory of Plasma Studies, Laboratory of Plasma Studies, Cornell University