Design and Testing of a Compact Sub-GW, Subnanosecond Pulser
Subnanosecond high-power pulsers find applications in diversified fields, such as generation of UWB signals and X-ray pulsed radiation, gas-discharge physics, study of rapid processes, etc. Probably the most advanced reliable compact pulsers were designed by the Ekaterinburg group.0–0 Sub-GW levels were achieved in a modest-size package of several tens of kg. The approach of Refs. 1, 2, 3 was to use fast spark gaps (SG) for pulse sharpening. The underlying philosophy is to overvolt both the SGs and the insulation of the energy storage components. At a higher overvoltage, the first break down faster, while the second withstands higher stresses without breakdown. Both these effects are well known in high voltage engineering and discharge physics.0,0 Rukin et al.0 describe all solid-state subnanosecond switching at a power level comparable to that of SG switching, with all the benefits of high repetition rate, longevity and stability. The shortcomings of this technique are low efficiency and relatively large transition times.
KeywordsCopper Electrode Load Voltage Rogowski Coil PSpice Simulation Capacitive Divider
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