The screen efficiency of sealed-off high-speed-oscillograph cathode-ray tubes

The factors which affect the screen efficiency of a high-speed oscillograph cathode-ray tube are summarized, and the nature of the shape of the luminance pulse produced by a short-duration square-wave screen excitation is explained. It is then shown how shortening the duration of screen excitation reduces the screen efficiency of the tube as a consequence of energy lost by non-radiative dissipation.