We present experiments performed on the 1 MA COBRA generator using a low density, annular, gas-puff z-pinch implosion as an opening switch to rapidly transfer a current pulse into a single metal wire on axis. This gas-puff on axial wire configuration was studied for its promise as an opening switch and as a means of enhancing the x-ray output of the wire. We demonstrate that current can be switched from the gas-puff plasma into the wire, and that the timing of the switch can be controlled by the gas-puff plenum backing pressure. X-ray detector measurements indicate that for low plenum pressure Kr or Xe shots with a copper wire, this configuration can offer a significant enhancement in the peak intensity and temporal distribution of radiation in the 1–10 keV range.
Enhancing the x-ray output of a single-wire explosion with a gas-puff based plasma opening switch
Joseph T. Engelbrecht, Nicholas D. Ouart, Niansheng Qi, Philip W. de Grouchy, Tatiana A. Shelkovenko, Sergey A. Pikuz, Jacob T. Banasek, William M. Potter, Sophia V. Rocco, David A. Hammer, Bruce R. Kusse, John L. Giuliani; Enhancing the x-ray output of a single-wire explosion with a gas-puff based plasma opening switch. Phys. Plasmas 1 February 2018; 25 (2): 022704. https://doi.org/10.1063/1.5019378
Download citation file: