Abstract
An image-converter streak camera is described which utilises an English Electric P856/20 electrostatically focused shutter tube operated in a normally cut-off mode. Streak record-time ranges of 50 ns to 10 mu s are obtained by sequentially pulsing two of the tube electrodes, using avalanche pulse generators to give the shutter action. The sweep deflection voltages, obtained from hard valves, type EL822, are gated from transistor switches. The use of these circuits has enabled a start delay time of 10 ns to be achieved. The camera has been used to investigate spark-channel formation in hydrogen using parallel gap structures. A typical result is presented.
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