Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
63 (1988), S. 4899-4904
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Results of high-speed streak photography of the initial stages of a discharge in technical vacuum are presented. The roles of electrode material, electrode spacing, gas pressure, and gas composition were investigated as well as the influence of cathode temperature. The results show that the visible light in the initial stages of the discharge oscillates in intensity with a period of between 4 and 5 ns. The period is little changed by any of the parameters studied. The results are examined in the light of three models for the process; explosive emission, oscillations in layers of solid adsorbate on the cathode, and oscillations in the space charges in the gap. The results definitely exclude explosive emission and do not fit well with the requirements of oscillations in cathode surface layers. It is concluded that space-charge oscillations are responsible for observed oscillations in visible light intensity and gap current.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.340430
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