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Rare gas and mercury halide lasers have introduced new opportunities for achievingefficient scalable lasers at ultraviolet-visible wavelengths.The rare gas halide lasers suchas KrF and ArF were originally demonstrated in electron-beam pumped mixtures of highpressure rare gases with halide donor species and mercury vapor in the case of HgCl andHgBr mercury halide lasers.This method of excitation forms the laser molecule directlyin the excited state via ion-ion recombination,for expample Kr~+ and F~- or Hg~+ and CI~-.For this reason the formation kinetics of KrF and HgCl in e-beam pumped mixturesexhibit many similarities.Since these ionic formation channels require ～25 eV toproduce the positive ion,a formation efficiency of approximately 20% for KrF and 9%for HgCl is possible.A review of laser experiments and kinetics measurements will be pre-sented for e-beam numped KrF and HgCl lasers a general overview of scaling considera-
Rare gas and mercury halide lasers have introduced new opportunities for achievinfficient scalable lasers at ultraviolet-visible wavelengths. The rare gas halide lasers suchas KrF and ArF were originally demonstrated in electron-beam pumped mixtures of high pressureure rare gases with halide donor species and mercury vapor in the case of HgCl andHgBr mercury halide lasers. This method of excitation forms the laser molecule directly in the excited state of ion-ion recombination, for exp. Kr ~ + and F ~ - or Hg ~ + and CI ~ -.For this reason the formation kinetics of KrF and HgCl in e-beam pumped mixturesexhibit many similarities. These ionic formation channels require ~ 25 eV toproduce the positive ion, a formation efficiency of approximately 20% for KrF and 9% for HgCl is possible. A review of laser experiments and kinetics measurements will be pre-sented for e-beam numped KrF and HgCl lasers a general overview of scaling considera-