Comparison between the ultraviolet emission from pulsed microhollow cathode discharges in xenon and argon

Petzenhauser, Isfried; Biborosch, Leopold D.; Emst, Uwe; Frank, Klaus; Schoenbach, Karl H.
November 2003
Applied Physics Letters;11/24/2003, Vol. 83 Issue 21, p4297
Academic Journal
We measured the dynamic I–V characteristics and vacuum ultraviolet (VUV) emission lines of the second continuum in xenon (170 nm) and argon (130.5 nm) from pulsed microhollow cathode discharges (MHCD). For pulse lengths between 1 and 100 μs the dynamic I–V characteristics are similar in both inert gases. Only the time variation of the VUV emission line at 170 nm for xenon can be related to the dimer excited states. In argon the energy transfer between the Ar[sub 2][sup *] dimers and the oxygen impurity atoms is responsible for a qualitatively different time behavior of the resonance line at 130.5 nm. Consequently, the relative VUV efficiency reveals an inverse dependence on the electrical pulse lengths for the MHCD in xenon and argon, respectively. © 2003 American Institute of Physics.


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