- Access by Xinjiang University
The Dark Current Time in Condensed Discharges in Air at Atmospheric Pressure
Phys. Rev. 40, 409 – Published 1 May, 1932
DOI: https://doi.org/10.1103/PhysRev.40.409
Abstract
The time of current flow prior to the appearance of luminosity in a condensed discharge was measured by means of the high speed rotating mirror developed by Henriot and Hunguenard. The discharge was initiated by ultraviolet light from another spark gap. This light was focussed on the cathode of the gap under investigation. The light from the two gaps after reflection by the mirror was focussed on a photographic plate. The separation of the images on the plate was a measure of the dark current time. This time was found to be a function of the electrode geometry. For symmetrical hemispherical electrodes, 6.5 mm in diameter, 4 mm apart, it was not greater than 2× sec. It increased to 3× sec. for a gap with two spherical electrodes, the anode 25.4 mm and the cathode 1 mm in diameter. As near as this method could determine, in all cases the luminosity appeared at the same time throughout the gap.
References (10)
- v. Hippel and Franck, Zeits. f. Physik 57, 696 (1929)
- P. O. Pedersen, Ann. d. Physik 71, 317 (1923)
- J. W. Beams, Jr. Franklin Inst. 206, 809 (1928)
- J. C. Street and J. W. Beams, Phys. Rev. 38, 416 (1931)
- K. Zuber, Ann. d. Physik 76, 231 (1925)
- Henriot and Hunguenard, Jour. d. Phys. et Radium 8, 443 (1927)
- J. W. Beams, Rev. of Sc. Inst. 1, 667 (1930)
- E. O. Lawrence and J. W. Beams, Phys. Rev. 32, 478 (1928)
- McEachron and Wade, A.I.E.E. 44, 832 (1925)
- Wolcott, Phys. Rev. 12, (1918)