Stability criteria in metal vapor discharges
- 1 June 1978
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 32 (11) , 705-708
- https://doi.org/10.1063/1.89913
Abstract
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<m⩾3 and νi0, is the equilibrium ionization rate. For a recombination‐dominated discharge the criterion in this limit is ane0⩾mνi0 where 1.0<m⩾1.5 and a is the recombination coefficient and ne0 is the equilibrium electron density.Keywords
This publication has 4 references indexed in Scilit:
- Laser action on the B2Σ+1/2→X2Σ+1/2 band of HgCl at 5576 ÅApplied Physics Letters, 1977
- Modeling the KrF laser dischargeApplied Physics Letters, 1976
- Attachment-dominated electron-beam-ionized dischargesApplied Physics Letters, 1976
- Visible continua of the cadmium mercury moleculeJournal of Physics B: Atomic and Molecular Physics, 1976