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Long-lived CO/sub 2/ lasers with distributed heterogeneous catalysis

Abstract

In a sealed CO/sub 2/-N/sub 2/-He system with a clean discharge tube the degree of dissociation of the CO/sub 2/ is greater than 80 percent (with no hydrogen present), and laser action cannot be obtained. If Pt is distributed along the discharge tube walls as a discontinuous film it catalyses back-reactions reforming CO/sub 2/. The degree of dissociation is then less than 40 percent, and efficient laser action at 10.6 ..mu.. is obtained. Using such distributed heterogeneous catalysis, a CO/sub 2/-N/sub 2/-He-Xe laser has operated for more than 3000 h. In this system, both H/sub 2/ and D/sub 2/ are undesirable additives because they decrease the excitation rate of the upper laser level. (auth)
Publication Date:
Dec 11, 1974
Product Type:
Journal Article
Reference Number:
EDB-76-060974
Resource Relation:
Journal Name: J. Phys., D (London); (United Kingdom); Journal Volume: 7
Subject:
42 ENGINEERING; CARBON DIOXIDE LASERS; PERFORMANCE; DISSOCIATION; HELIUM; NITROGEN; XENON; CRYOGENIC FLUIDS; ELEMENTS; FLUIDS; GAS LASERS; LASERS; NONMETALS; RARE GASES; 420300* - Engineering- Lasers- (-1989)
OSTI ID:
7276329
Research Organizations:
St. Andrews Univ., Scotland
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: JPDBA
Submitting Site:
IAA
Size:
Pages: 2464-2470
Announcement Date:
Aug 01, 1976

Citation Formats

Browne, P G, and Smith, A L.S. Long-lived CO/sub 2/ lasers with distributed heterogeneous catalysis. United Kingdom: N. p., 1974. Web.
Browne, P G, & Smith, A L.S. Long-lived CO/sub 2/ lasers with distributed heterogeneous catalysis. United Kingdom.
Browne, P G, and Smith, A L.S. 1974. "Long-lived CO/sub 2/ lasers with distributed heterogeneous catalysis." United Kingdom.
@misc{etde_7276329,
title = {Long-lived CO/sub 2/ lasers with distributed heterogeneous catalysis}
author = {Browne, P G, and Smith, A L.S.}
abstractNote = {In a sealed CO/sub 2/-N/sub 2/-He system with a clean discharge tube the degree of dissociation of the CO/sub 2/ is greater than 80 percent (with no hydrogen present), and laser action cannot be obtained. If Pt is distributed along the discharge tube walls as a discontinuous film it catalyses back-reactions reforming CO/sub 2/. The degree of dissociation is then less than 40 percent, and efficient laser action at 10.6 ..mu.. is obtained. Using such distributed heterogeneous catalysis, a CO/sub 2/-N/sub 2/-He-Xe laser has operated for more than 3000 h. In this system, both H/sub 2/ and D/sub 2/ are undesirable additives because they decrease the excitation rate of the upper laser level. (auth)}
journal = []
volume = {7}
journal type = {AC}
place = {United Kingdom}
year = {1974}
month = {Dec}
}