Thermal and Evolved Gas Analyzer: Part of the Mars Volatile and Climate Surveyor integrated payload

William V. Boynton, Samuel H. Bailey, David K. Hamara, Michael S. Williams, Rolfe C. Bode, Michael R. Fitzgibbon, WenJeng Ko, Michael G. Ward, K. R. Sridhar, Jeff A. Blanchard, Ralph D. Lorenz, Randy D. May, David A. Paige, Asmin V. Pathare, David A. Kring, Laurie A. Leshin, Douglas W. Ming, Aaron P. Zent, D. C. Golden, Kristopher E. KerryH. Vern Lauer, Richard C. Quinn

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The Thermal and Evolved Gas Analyzer (TEGA) on the Mars Polar Lander spacecraft is composed of two separate components which are closely coupled: a Differential Scanning Calorimeter (DSC) and an Evolved Gas Analyzer (EGA). TEGA has the capability of performing differential scanning calorimetry on eight small (0.038 mL) soil samples selected in the vicinity of the lander. The samples will be heated in ovens to temperatures up to 950°C, and the volatile compounds water and carbon dioxide, which are released during the heating, will be analyzed in the EGA. The power required by the sample oven is continuously monitored during the heating and compared to that required to heat simultaneously a similar, but empty, oven. The power difference is the output of the DSC. Both endothermic and exothermic phase transitions can be detected, and the data can be used in the identification of the phases present. By correlating the gas release with the calorimetry, the abundance of the volatile compounds associated with the different phases can be determined. The EGA may also be able to detect the release of oxygen associated with any superoxide that may be on the surface of the soil grains. The instrument can detect the melting of ice in the DSC down to abundances on the order of 0.2% of the sample, and it can detect the decomposition of calcite, CaCO3, down to abundances of 0.5%. Using the EGA, TEGA can detect small amounts of water, down to 8 ppm in the sample, and it can detect the associated release of CO2 down to the equivalent abundances of 0.03%. The EGA also has the ability to determine the 13C/12C ratio in the evolved CO2, but it is not clear if the accuracy of this ratio will be sufficient to address the scientific issues.

Original languageEnglish (US)
Pages (from-to)17683-17698
Number of pages16
JournalJournal of Geophysical Research: Space Physics
Volume106
Issue numberE8
StatePublished - Aug 25 2001

Fingerprint

payloads
mars
climate
Mars
analyzers
Gases
gases
gas
ovens
Ovens
Calorimeters
calorimeters
scanning
calorimetry
Scanning
Mars Polar Lander
soils
heat measurement
heating
Soils

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)
  • Atmospheric Science
  • Geochemistry and Petrology
  • Geophysics
  • Oceanography
  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Boynton, W. V., Bailey, S. H., Hamara, D. K., Williams, M. S., Bode, R. C., Fitzgibbon, M. R., ... Quinn, R. C. (2001). Thermal and Evolved Gas Analyzer: Part of the Mars Volatile and Climate Surveyor integrated payload. Journal of Geophysical Research: Space Physics, 106(E8), 17683-17698.

Thermal and Evolved Gas Analyzer : Part of the Mars Volatile and Climate Surveyor integrated payload. / Boynton, William V.; Bailey, Samuel H.; Hamara, David K.; Williams, Michael S.; Bode, Rolfe C.; Fitzgibbon, Michael R.; Ko, WenJeng; Ward, Michael G.; Sridhar, K. R.; Blanchard, Jeff A.; Lorenz, Ralph D.; May, Randy D.; Paige, David A.; Pathare, Asmin V.; Kring, David A.; Leshin, Laurie A.; Ming, Douglas W.; Zent, Aaron P.; Golden, D. C.; Kerry, Kristopher E.; Lauer, H. Vern; Quinn, Richard C.

In: Journal of Geophysical Research: Space Physics, Vol. 106, No. E8, 25.08.2001, p. 17683-17698.

Research output: Contribution to journalArticle

Boynton, WV, Bailey, SH, Hamara, DK, Williams, MS, Bode, RC, Fitzgibbon, MR, Ko, W, Ward, MG, Sridhar, KR, Blanchard, JA, Lorenz, RD, May, RD, Paige, DA, Pathare, AV, Kring, DA, Leshin, LA, Ming, DW, Zent, AP, Golden, DC, Kerry, KE, Lauer, HV & Quinn, RC 2001, 'Thermal and Evolved Gas Analyzer: Part of the Mars Volatile and Climate Surveyor integrated payload', Journal of Geophysical Research: Space Physics, vol. 106, no. E8, pp. 17683-17698.
Boynton, William V. ; Bailey, Samuel H. ; Hamara, David K. ; Williams, Michael S. ; Bode, Rolfe C. ; Fitzgibbon, Michael R. ; Ko, WenJeng ; Ward, Michael G. ; Sridhar, K. R. ; Blanchard, Jeff A. ; Lorenz, Ralph D. ; May, Randy D. ; Paige, David A. ; Pathare, Asmin V. ; Kring, David A. ; Leshin, Laurie A. ; Ming, Douglas W. ; Zent, Aaron P. ; Golden, D. C. ; Kerry, Kristopher E. ; Lauer, H. Vern ; Quinn, Richard C. / Thermal and Evolved Gas Analyzer : Part of the Mars Volatile and Climate Surveyor integrated payload. In: Journal of Geophysical Research: Space Physics. 2001 ; Vol. 106, No. E8. pp. 17683-17698.
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abstract = "The Thermal and Evolved Gas Analyzer (TEGA) on the Mars Polar Lander spacecraft is composed of two separate components which are closely coupled: a Differential Scanning Calorimeter (DSC) and an Evolved Gas Analyzer (EGA). TEGA has the capability of performing differential scanning calorimetry on eight small (0.038 mL) soil samples selected in the vicinity of the lander. The samples will be heated in ovens to temperatures up to 950°C, and the volatile compounds water and carbon dioxide, which are released during the heating, will be analyzed in the EGA. The power required by the sample oven is continuously monitored during the heating and compared to that required to heat simultaneously a similar, but empty, oven. The power difference is the output of the DSC. Both endothermic and exothermic phase transitions can be detected, and the data can be used in the identification of the phases present. By correlating the gas release with the calorimetry, the abundance of the volatile compounds associated with the different phases can be determined. The EGA may also be able to detect the release of oxygen associated with any superoxide that may be on the surface of the soil grains. The instrument can detect the melting of ice in the DSC down to abundances on the order of 0.2{\%} of the sample, and it can detect the decomposition of calcite, CaCO3, down to abundances of 0.5{\%}. Using the EGA, TEGA can detect small amounts of water, down to 8 ppm in the sample, and it can detect the associated release of CO2 down to the equivalent abundances of 0.03{\%}. The EGA also has the ability to determine the 13C/12C ratio in the evolved CO2, but it is not clear if the accuracy of this ratio will be sufficient to address the scientific issues.",
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T2 - Part of the Mars Volatile and Climate Surveyor integrated payload

AU - Boynton, William V.

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AU - Hamara, David K.

AU - Williams, Michael S.

AU - Bode, Rolfe C.

AU - Fitzgibbon, Michael R.

AU - Ko, WenJeng

AU - Ward, Michael G.

AU - Sridhar, K. R.

AU - Blanchard, Jeff A.

AU - Lorenz, Ralph D.

AU - May, Randy D.

AU - Paige, David A.

AU - Pathare, Asmin V.

AU - Kring, David A.

AU - Leshin, Laurie A.

AU - Ming, Douglas W.

AU - Zent, Aaron P.

AU - Golden, D. C.

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N2 - The Thermal and Evolved Gas Analyzer (TEGA) on the Mars Polar Lander spacecraft is composed of two separate components which are closely coupled: a Differential Scanning Calorimeter (DSC) and an Evolved Gas Analyzer (EGA). TEGA has the capability of performing differential scanning calorimetry on eight small (0.038 mL) soil samples selected in the vicinity of the lander. The samples will be heated in ovens to temperatures up to 950°C, and the volatile compounds water and carbon dioxide, which are released during the heating, will be analyzed in the EGA. The power required by the sample oven is continuously monitored during the heating and compared to that required to heat simultaneously a similar, but empty, oven. The power difference is the output of the DSC. Both endothermic and exothermic phase transitions can be detected, and the data can be used in the identification of the phases present. By correlating the gas release with the calorimetry, the abundance of the volatile compounds associated with the different phases can be determined. The EGA may also be able to detect the release of oxygen associated with any superoxide that may be on the surface of the soil grains. The instrument can detect the melting of ice in the DSC down to abundances on the order of 0.2% of the sample, and it can detect the decomposition of calcite, CaCO3, down to abundances of 0.5%. Using the EGA, TEGA can detect small amounts of water, down to 8 ppm in the sample, and it can detect the associated release of CO2 down to the equivalent abundances of 0.03%. The EGA also has the ability to determine the 13C/12C ratio in the evolved CO2, but it is not clear if the accuracy of this ratio will be sufficient to address the scientific issues.

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