Some observations on the writing-speed performance of cathodochromic cathode-ray tubes

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Abstract
The writing speed of cathodochromic cathode-ray tubes appears to have an optimum performance at high accelerating voltages. It is believed that, at these voltages, the coloration of cathodochromic material produced by an electron beam is enhanced by X rays, the effect being clearly demonstrated as the acceleration voltage is increased from a relatively low value up to, and above, the voltage at which X rays are generated.