Abstract

A sliding spark over solid xenon has been developed with the object to serve as a vacuum-ultraviolet light source for the photoionization of gases, especially hydrogen and inert gases. An intensity of 1·1012 Watt/cm3 sr at 800 A has been observed, lasting about 5 μsec. The emitting area was approximately 1.6 cm2. This light source has been used to irradiate a test gas of xenon at 0.4 m Torr. An electron density of 2·1012 cm−3 was detected at a distance of 80 cm with an 8 mm microwave interferometer.

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