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Proceedings Paper

COCHISE: Laboratory Spectroscopic Studies Of Atmospheric Phenomena With High-Sensitivity Cryogenic Instrumentation
Author(s): John P. Kennealy; Francis P. Del Greco; George E. Caledonia; Wilson T. Rawlins
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Paper Abstract

The design of the COCHISE facility, a cryogenic apparatus used for laboratory studies of high altitude infrared excitation phenomena, is presented. The basic design concept is the extensive reduction of thermal background radiation through cryogenic (20 K) cooling of the entire reaction volume and detection system. Vibrationally excited molecules (e.g., NO, 03, CO) are formed in a low-pressure ( - 3 mtorr) environment by interaction of a flowing reactant gas with discharge--produced radical and/or metastable species; the resulting infrared radiation is detected in the absence of interference from relaxation and surface effects. A long-path optical system and cryogenic monochromator permit high sensitivity for vibrationally excited species ( - 106 molecules cm-3) and excellent spectral resolution ( 2 cm ) over the spectral range 2-16 μm. The design and operation of the facility are described in detail. Specific applications of the facility to investigations of infrared atmospheric phenomena are also discussed.

Paper Details

Date Published: 29 October 1979
PDF: 7 pages
Proc. SPIE 0191, Multiplex and/or High Throughput Spectroscopy, (29 October 1979); doi: 10.1117/12.957827
Show Author Affiliations
John P. Kennealy, Air Force Geophysics Laboratory (United States)
Francis P. Del Greco, Air Force Geophysics Laboratory (United States)
George E. Caledonia, Physical Sciences Inc. (United States)
Wilson T. Rawlins, Physical Sciences Inc. (United States)

Published in SPIE Proceedings Vol. 0191:
Multiplex and/or High Throughput Spectroscopy
George A. Vanasse, Editor(s)

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