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Spark-Gap Crowbar for High-Voltage Power Supply

A new crowbar circuit employing a pressurized spark gap has been designed to replace the existing ignitron crowbar that protects a 500-kW klystron tube when it arcs. The spark gap offers definite performance advantages when compared to the conventional ignitron circuits. The small overall size makes the spark gap more convenient and the very few components make it more reliable than the ignitron crowbar.