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Plasma formation and the correlation with current loss in post-hole convolutes - Matthew Gomez

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Uploaded on Jul 29, 2011

View more information on the DOE NNSA SSGF Program at http://www.krellinst.org/ssgf.

Post-hole convolutes are used in large pulsed-power devices to reduce the system inductance by combining the current from several self-magnetically insulated transmission lines at the load. This allows the driver to achieve larger peak currents with shorter risetimes than if a single transmission line were used. The efficiency of post-hole convolutes at higher driver powers has recently come into question. After the refurbishment of the Z-Machine at Sandia National Laboratories, which doubled the electrical power, the convolute losses increased from 5-10 percent to to as much as 20 percent of the peak current on particularly lossy shots.

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