Experimental basis for a Titan probe organic analysis

Details Experimental basis for a Titan probe organic analysis Experimental basis for a Titan probe organic analysis

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ceol.symp...52m&link_type=abstract

In NASA, Washington Second Symposium on Chemical Evolution and the Origin and Evolution of Life p 52 (SEE N86-26844 17-55)

Biology

Atmospheric Models, Chemical Analysis, Chemical Evolution, Organic Chemistry, Titan, Chemical Composition, Electric Discharges, Exobiology, Methane, Nitrogen, Planetary Atmospheres

Scientific paper

The recent Voyager flyby of Titan produced evidence for at least nine organic compounds in that atmosphere that are heavier than methane. Several models of Titan's atmosphere, as well as laboratory simulations, suggest the presence of organics considerably more complex that those observed. To ensure that the in situ measurements are definitive with respect to Titan's atmosphere, experiment concepts, and the related instrumentation, must be carefully developed specifically for such a mission. To this end, the possible composition of the environment to be analyzed must be bracketed and model samples must be provided for instrumentation development studies. Laboratory studies to define the optimum flight experiment and sampling strategy for a Titan entry probe are currently being conducted. Titan mixtures are being subjected to a variety of energy sources including high voltage electron from a DC discharge, high current electric shock, and laser detonation. Gaseous and solid products are produced which are then analyzed. Samples from these experiements are also provided to candidate flight experiments as models for instrument development studies. Preliminary results show that existing theoretical models for chemistry in Titan's atmosphere cannot adequetely explain the presence and abundance of all trace gases observed in these experiments.

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