Efficent cw rare gas- halide excimer light sources
Abstract
Extending our work on low energy (10-20keV) dc electron beam excitation of pure rare gases (j. Wieser, D. E. Murnick, A. Ulrich, H. A. Huggins, A. Liddle, and W. L. Brown, Rev. Sci. Instrum. 68, 1360 (1997).) we have begun studies of energy transfer mechanisms in rare gas halogen (RG-H) mixtures. For these systems the thin SiN entrance windows must be coated with halogen resitant films. The system Ar+Cl2 (0-1%) is the first to be studied though other RG-H systems are expected to exihibit similar behaviour. At very low Cl2 concentrations near 1bar the VUV spectrum includes Ar2* excimer radiation, ClI resonance lines and ArCl* radiation. At higher concentrations the ArCl* band at 175nm dominates the spectrum with energy transfer efficiencies exceeding 5% observed. Calculations of threshold pumping power required indicates that compact RG-H lasers based on the e-beam pumped system are feasible with average output powers in the Watt range.
- Publication:
-
APS Annual Gaseous Electronics Meeting Abstracts
- Pub Date:
- October 1998
- Bibcode:
- 1998APS..GEC.NW205U