Physics – Geophysics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p43b1668b&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #P43B-1668
Physics
Geophysics
[0994] Exploration Geophysics / Instruments And Techniques, [1094] Geochemistry / Instruments And Techniques, [3094] Marine Geology And Geophysics / Instruments And Techniques, [3694] Mineralogy And Petrology / Instruments And Techniques
Scientific paper
Deep penetration and sample acquisition are critical capabilities for the NASA in-situ exploration missions to bodies in the solar system, including the missions to Mars. A rotary-hammering drilling and coring device called Auto-Gopher is being developed that addresses this need by producing a rotary-hammering drilling and coring device that It employs a piezoelectric actuated percussive mechanism for breaking formations and electric motor generated rotation that removes the cuttings. The percussive and rotary motions of the Auto-Gopher are activated simultaneously to optimize the penetration rate. The percussive mechanism is based on the Ultrasonic/Sonic Drill/Corer (USDC) mechanism that was demonstrated to require low axial preload. This sampler is a wireline mechanism that allows thru cyclic coring and core removal to reach great depths in subsurfaces and it is intended to establish the capability to penetrate the subsurface of Mars beyond the oxidized and sterilized zone and acquire pristine samples. The Auto-Gopher that is under development represents a lessons learned from the development of the Gopher drill that is percussive only and was demonstrated to penetrated about 2 meters deep ice at in Antarctica in 2005. The demonstration of the Auto-Gopher will include coring gypsum and limestone substrates and it will be field tested to reach as deep as 3 to 5 meters.
Badescu Mircea
Bao Xuezhao
Bar-Cohen Yoseph
Beegle Luther W.
Paulsen G.
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