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Research on catalysts for long-life closed-cycle CO2 laser oaperationLong-life, closed-cycle operation of pulsed CO2 lasers requires catalytic CO-O2 recombination both to remove O2, which is formed by discharge-induced CO2 decomposition, and to regenerate CO2. Platinum metal on a tin-oxide substrate (Pt/SnO2) has been found to be an effective catalyst for such recombination in the desired temperature range of 25 to 100 C. This paper presents a description of ongoing research at NASA-Langley on Pt/SnO2 catalyzed CO-O2 recombination. Included are studies with rare-isotope gases since rare-isotope CO2 is desirable as a laser gas for enhanced atmospheric transmission. Results presented include: (1) the effects of various catalyst pretreatment techniques on catalyst efficiency; (2) development of a technique, verified in a 30-hour test, to prevent isotopic scrambling when C(O-18) and (O-18)2 are reacted in the presence of a common-isotope Pt/Sn(O-16)2 catalyst; and (3) development of a mathematical model of a laser discharge prior to catalyst introduction.
Document ID
19880049069
Document Type
Conference Paper
Authors
Sidney, Barry D. (NASA Langley Research Center Hampton, VA, United States)
Schryer, David R. (NASA Langley Research Center Hampton, VA, United States)
Upchurch, Billy T. (NASA Langley Research Center Hampton, VA, United States)
Hess, Robert V. (NASA Langley Research Center Hampton, VA, United States)
Wood, George M. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Subject Category
LASERS AND MASERS
Distribution Limits
Public
Copyright
Other