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Five-Channel Infrared Laser Absorption Spectrometer for Combustion Product Monitoring Aboard Manned SpacecraftContinuous combustion product monitoring aboard manned spacecraft can prevent chronic exposure to hazardous compounds and also provides early detection of combustion events. As future missions extend beyond low-Earth orbit, analysis of returned environmental samples becomes impractical and safety monitoring should be performed in situ. Here, we describe initial designs of a five-channel tunable laser absorption spectrometer to continuously monitor combustion products with the goal of minimal maintenance and calibration over long-duration missions. The instrument incorporates dedicated laser channels to simultaneously target strong mid-infrared absorption lines of CO, HCl, HCN, HF, and CO2. The availability of low-power-consumption semiconductor lasers operating in the 2 to 5 micron wavelength range affords the flexibility to select absorption lines for each gas with maximum interaction strength and minimal interference from other gases, which enables the design of a compact and mechanically robust spectrometer with low-level sensitivity. In this paper, we focus primarily on absorption line selection based on the availability of low-power single-mode semiconductor laser sources designed specifically for the target wavelength range.
Document ID
20160008254
Document Type
Conference Paper
External Source(s)
Authors
Briggs, Ryan M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Frez, Clifford
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Borgentun, Carl E.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bagheri, Mahmood
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Forouhar, Siamak
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
May, Randy D.
(Port City Instruments, LLC Wilmington, NC, United States)
Date Acquired
July 1, 2016
Publication Date
July 13, 2014
Subject Category
Inorganic, Organic And Physical Chemistry
Instrumentation And Photography
Report/Patent Number
ICES-2014-244
Meeting Information
Meeting: International Conference on Environmental Systems (ICES)
Location: Tucson, AZ
Country: United States
Start Date: July 13, 2014
End Date: July 17, 2014
Sponsors: International Conference On Environmental Systems, Inc. (ICES), American Society of Mechanical Engineers, Texas Tech Univ., American Inst. of Chemical Engineers
Distribution Limits
Public
Copyright
Other

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