The Traveling-Wave Cathode-Ray Tube

We have constructed cathode-ray tubes utilizing traveling waves, whose deflection sensitivity can be made independent of frequency by equalizing the phase velocity of the wave and the electron velocity. According to the theoretical analysis, the sensitivity of this tube is increased to 10
^-1
mm/v at 30 kMc without any difficulty. The results of the theoretical analysis are proved experimentally by the inversion spectrums. As examples of its application, measurements of amplitude modulation degree and observations of uhf voltage wave form are described in this paper.