Electron Velocities in a High Frequency Discharge in Hydrogen

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Abstract
A high frequency discharge in hydrogen was obtained by applying undamped high frequency voltages to the movable external electrodes of a cylindrical discharge tube. The mean velocity of the electrons in the discharge was determined from the ratio of the densities of certain singlet and triplet lines of the molecular spectrum of hydrogen. It was found (1) that the electron velocity increases as the voltage between electrodes is increased, the gas pressure and the frequency of oscillation being constant; (2) for a given voltage between electrodes, the electron velocity is, in general, greater the longer the wave-length of oscillation; (3) the electron velocity decreases as the pressure is increased. The paper concludes with a discussion of the mechanism of the high frequency discharge in which an explanation of its behavior is proposed.

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