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Thermal and Evolved Gas Analyses at Reduced Pressures: A Mineral Database for the Thermal Evolved Gas Analyzer (TEGA)Volatile-bearing minerals (e.g., Fe-oxyhydroxides, phyllosilicates, carbonates, and sulfates) may be important phases on the surface of Mars. The Thermal Evolved Gas Analyzer (TEGA), which was part of the Mars Polar Lander payload, was to detect and identify volatile-bearing phases in the Martian regolith. The TEGA instrument is composed of a differential scanning calorimetry (DSC) interfaced with an evolved gas analyzer (EGA). The EGA consists of a Herriott cell of a tunable-diode laser (TDL) spectrometer that determines CO, and H2O abundances. The sample chamber in TEGA operates at about 100 mbar (-76 torr) with a N2 carrier gas flow of 0.4 sccm. Essentially no information exists on the effects of reduced pressure on the thermal properties of volatile-bearing minerals. Here we present a database for the thermal behavior of volatile-bearing phases under reduced pressure conditions.
Document ID
20000085925
Acquisition Source
Johnson Space Center
Document Type
Preprint (Draft being sent to journal)
Authors
Lauer, H. V., Jr. (Lockheed Martin Space Mission Systems and Services Houston, TX United States)
Ming, Douglas W. (NASA Johnson Space Center Houston, TX United States)
Golden, D. C. (Hernandez Engineering, Inc. Houston, TX United States)
Lin, I.-C. (NASA Johnson Space Center Houston, TX United States)
Morris, R. V. (NASA Johnson Space Center Houston, TX United States)
Boynton, W. V. (Arizona Univ. Tucson, AZ United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2000
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Lunar and Planetary Science
Location: Houston, TX
Country: United States
Start Date: March 13, 2000
End Date: March 17, 2000
Sponsors: NASA Johnson Space Center, NASA Headquarters, Lunar and Planetary Inst.
Funding Number(s)
PROJECT: RTOP 898-10-01-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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