Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufm.p23c1281m&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #P23C-1281
Physics
[5418] Planetary Sciences: Solid Surface Planets / Heat Flow
Scientific paper
The subsurface temperature of the Moon is strongly influenced by the diurnal, annual, and precession fluctuations of the insolation. Therefore, to measure the heat flow, the probe has to be inserted to a depth of at least 3m. There are a number of ways the heat flow probe can be deployed. These methods differ in many ways such as simplicity and mass of the deployment system, power required to deploy it, extent of thermal isolation between temperature sensors and between sensors themselves and surface system (deployment system, lander, electronics box etc), thermal sensor placement within the hole (radiative as opposed to conducive coupling), and methods of deployment. The percussive based heat flow probe utilizes a percussive approach to drive a small diameter (20mm) cone penetrometer to >3 meter depths, deploying ring-like thermal sensors every 30 cm. It leaves only small sensors in the borehole, maximizing measurement sensitivity by minimizing thermal coupling from the lander to the electrical tether. The proboscis based heat flow probe utilizes a pneumatic (gas) approach to lower the heat flow probe, a lenticular tape, to 3 meters. The system offers extremely low mass, volume, and simple deployment.
Kumar Nirman
Mumm Erik
Zacny Kris
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