Triggering of radial multichannel pseudospark switches by a pulsedhollow cathode discharge |
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Authors: | Tkotz R. Schlaug M. Christiansen J. Frank K. Gortler A. Schwandner A. |
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Affiliation: | Dept. of Phys., Erlangen-Nurnberg Univ.; |
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Abstract: | We report on a special trigger discharge for pulsed high-power pseudospark switches. The switch used is a radial three-channel pseudospark switch. For triggering, a cylindrical trigger electrode is inserted into the hollow cathode of the main gap. This electrode acts as a hollow cathode for the dc preionization, while the hollow cathode of the main gap is the anode. A negative high-voltage pulse supplied to the trigger electrode ignites the main discharge. We report the temporal evolution of the trigger discharge observed with a fast camera. This trigger method gives an excellent current distribution among the discharge channels, as can be proven by fast photography. The switch has a delay of 220 ns and a jitter of 15 ns |
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