Stability criteria in metal vapor discharges

Details Stability criteria in metal vapor discharges Stability criteria in metal vapor discharges

Jun 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apphl..32..705s&link_type=abstract

Applied Physics Letters, Volume 32, Issue 11, id. 705 (1978).

Physics

5

Electric Discharges

Scientific paper

In this letter we discuss the stability criteria in recombination- and attachment-dominated metal vapor laser discharges. The mercury halide laser discharges are typical of attachment-dominated discharges, while the metal vapor exciplex lasers, like CdHg*, are typical of recombination-dominated discharges. In high-power electronic transition laser discharges, a relatively large excited-state population exists which dominates the stability of these discharges. This occurs because the excited states have a smaller ionization potential and larger ionization cross section than the ground state. As a result, multistep ionization is the dominant ionization. When three-step ionization is dominant and electron mixing of the excited states is unimportant, attachment-dominated discharges will be stable if the attachment rate β>=mνi0, where 2=3 and νi0, is the equilibrium ionization rate. For a recombination-dominated discharge the criterion in this limit is ane0>=mνi0 where 1.0=1.5 and a is the recombination coefficient and ne0 is the equilibrium electron density.

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