Abstract
A simple, low inductance (~50 nH) capacitor bank is developed for plasma focus operation. The bank comprises three modules, each consisting of two 2µF, 40 kV capacitors along with a field distortion type pressurized sparkgap. The system is employed to investigate the temporal correlation of neutrons, ion beam, high voltage probe, and Rogowski coil signals. From a careful analysis of the data, the high voltage probe signal is found to coincide well with the Rogowski coil signal, whereas the ion beam and the neutron pulses are delayed by 20–30 nsec. These observations suggest that in low energy plasma foci, ion beam generation and neutron emission occur after the maximum compression has taken place and the pinch filament has started to break, most probably due to the onset of sausage type instability.
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