Abstract
A comparison between the dc and the pulsed medium pressure discharge in Xenon (10...100 Torr) has shown that a significantly higher VUV-radiation (140 to 180 nm) occurs in the pulsed discharge (rectangular pulses in the frequency range of some kHz). For a pulse repetition frequency of 6 kHz and a pulse current of 250 mA measurements of the VUV-radiation and the density of excited atoms (1s5,1s4) in dependence on the duty cycle are presented. It is shown, that the mean value of the VUV-radiation reaches a maximum in dependence on the duty cycle. The enhanced radiation in the pulsed mode is connected with the effect of dissociative recombination and the formation of excimer states.
