Miniaturized, Low Power Cryogenic Inlet System with Sampling Probes for Titan

Thorleaf Research, Inc. has demonstrated feasibility in Phase 1 and now proposes a Phase 2 effort to develop a miniature, low power cryogenic inlet system with sampling probes for Titan. This addresses a key technology gap for planetary studies, mainly how to acquire and prepare complex cryogenic samples of astrobiology interest for in situ analysis while meeting challenging mass, volume and power constraints. The proposed sampling system is designed to collect surface samples at Titan's 94K (-179C) cryogenic temperatures using two different miniature probe designs, one for collecting atmospheric aerosols, dust or particles, and another for surface penetration. The samples, which are presumed to include hydrocarbons, nitriles, tholins and other materials, can then be thermally processed by vaporization, thermal desorption or pyrolysis to prepare them for chemical analysis by GC/MS, GC/IMS or other techniques. Our Phase 1 results have demonstrated feasibility for developing a miniaturized cryogenic sampling inlet system with sampling probes weighing on the order of 100g with a peak power consumption of 20 watts or less. Because vaporization, thermal desorption or pyrolysis heating would only be required for a few seconds during each chemical analysis duty cycle, we project average power usage at a fraction of a watt.