A crossed field (Penning) discharge device has been developed which can perform HVDC interruption. The discharge is controlled by a magnetic field, the removal of which causes the plasma to decay in a time ~10μs. The present single tube capability is 100 kV/2000 A with a recovery rate of 2 kV/μs. The tubes are capable of series and parallel operation, opening the door to many HVDC applications requiring forced current interruption at performance levels far in excess of those of a single tube.
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Gallagher et al. (1973) studied this question.
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