First Trial for Generating Repetitive Flash X Rays Using a Glass-Enclosed Cold-Cathode Triode with a Plate Target

概要

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The fundamental studies for generating repetitive flash x rays using a glass-enclosed triode with a plate target are described. This generator consisted of the following essential components: a constant positive high-voltage power supply with a maximum voltage of +100 kV, an energy storage condenser of 97 nF, a cable condense of 1.05 nF, a constant negative high-voltage power supply for supplying an initial trigger voltage of -7.0 kV, a repetitive trigger device, and an x-ray tube. The xray tube was of the glass-enclosed triode and consisted of the following major devices: a plate target made of tungsten, a rod-shaped graphite cathode, a mesh-type trigger electrode made from tungsten wires, an insulator made from an acrylate resin tube, and a tube body made of glass. The cable condenser was charged from 30 to 80 kV, and the electric charges in the condenser were discharged to the x-ray tube repetitively when a negative pulse with a maximum voltage of about -15 kV (no-Load) was input (added) to the trigger electrode. The maximum tube voltage was equivalent to the initial charged voltage of the cable condenser, and the maximum tube current was about 0.3 kA with a charged voltage of 60kV. Tbe x-ray durations were about 1μs. and the x-ray intensity was about 0.34μC/kg at 0.5 m per pulse with a charged voltage of 60 kV. The repetitive rate of the flash x rays was less than 100 Hz.
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