X-ray preionisation of the mercury halide lasers

Details X-ray preionisation of the mercury halide lasers X-ray preionisation of the mercury halide lasers

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1031..400s&link_type=abstract

IN: International Symposium on Gas Flow and Chemical Lasers, 7th, Vienna, Austria, Aug. 22-26, 1988, Proceedings (A90-11326 01-3

Computer Science

Gas Lasers, Ionization, Laser Outputs, Mercury Compounds, Metal Halides, X Rays, Chlorides, Gas Mixtures, Iodides, Ultraviolet Lasers

Scientific paper

X-rays have been used to preionize all three mercury halide lasers (HgX: X = Cl, Br, I) for the first time. This paper describes the design of the laser head, the discharge circuitry, and the X-ray preionization source used. The minimum X-ray source strength required to saturate the laser energy dependence on the preionization electron density has been determined; this corresponds to a dose of about 4 mR in a 70 ns FWHM pulse for the optimum mercury bromide laser gas mixture. Typical maximum energies and efficiencies obtained with the three mercury halides in N2/Ne/HgX2 gas mixtures were: 93 mJ (0.27 percent) for HgCl2, 100 mJ (0.34 percent) for HgBr2, and 22 mJ (0.08 percent) for HgI2. The possibility of scaling the mercury chloride and mercury iodide laser energies and efficiencies to levels comparable to the known best results for mercury bromide is discussed.

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