VAPoR: Analyzing Lunar Regolith by Pyrolysis Mass Spectrometry. Daniel P. Glavin and the VAPoR Team NASA Goddard Space Flight Center [email protected] 9 th LESWG General Meeting October 18, 2007.
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Supported by IRAD and Lunar Sortie Science Opportunities (LSSO)
Is there water-ice at the lunar poles? Spectrometry
Clementine: High circular polarization ratio (CPR) over dark areas at poles; No enhancement in sunlit areas.
Bussey et al. 2005; Fristad et al. 2004
The source of enhanced hydrogen at the poles remains controversial. In situ measurements will be necessary to determine the composition, abundance, spatial distribution, and source of lunar volatiles.
Potential Sources of Lunar Volatiles Spectrometry
(contamination, possible terrestrial meteorites)
Solar wind (implanted H,C,N, He, Ne)
Moon (radioactive decay, outgassing)
Interplanetary dust particles
Comets and Asteroids (water-ice, organics?)
LACE PI: John Hoffman
Surface regolith samples not analyzed by LACE
Mass: 7-15 kg 40 kg
Power: 20-25 W 60-80 W
Data rate: 1 kbps <100 kpbs Volume: 19 dm3 68 dm3
Sample Analysis at Mars (SAM)
Volatile Analysis by Pyrolysis of Regolith (VAPoR)
VAPoR can address ALL of these lunar surface science measurement objectives
Origin of Volatiles (Isotopes)
e.g. D/H and 13C/12C ratios
Mass range: 1-250 amu
Mass range: 1-250 amu
VAPoR instrument packaging optimized by D. Jones / 543
S. Gorevan and D. Roberts (Honeybee Robotics)
Lunar regolith core samples collected robotically or by an astronaut and delivered to 6 cup exchangeable sample carousel.
Carousel inserted into VAPoR and sample cups individually heated for quantitative volatiles analysis.
SAM pyrolysis unit
Vacuum pyrolysis chamber
Knudsen pyrolysis cell package
Evolved gas analysis of JSC-1 lunar regolith simulant heated to 1200ºC under vacuum
I. L. ten Kate and E. Patrick
RGA Quadrupole Mass Spectrometer
Detection limit for water in the ppm range (~ 0.0001%)
Niemann et al. (1996)
Jupiter: Galileo Probe Mass Spectrometer
Saturn: Cassini-Huygens Probe GCMS
Micro Electro Mechanical Sys-tems (MEMS) reflectron time of flight mass spectrometer (ToF-MS) currently under development at GSFC is one of the candidates for VAPoR.
(P. Roman, T. King ,and coworkers)
Future Opportunities package
Email: [email protected]