Record Details

Cleaning Genesis Sample Return Canister for Flight: Lessons for Planetary Sample Return
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External Online Source: http://curator.jsc.nasa.gov/genesis/index.cfm
Author and Affiliation:
Allton, J. H.(Lockheed Martin Space Operations, Houston, TX, United States);
Hittle, J. D.(Lockheed Martin Space Operations, Houston, TX, United States);
Mickelson, E. T.(Lockheed Martin Space Operations, Houston, TX, United States);
Stansbery, Eileen K.(NASA Johnson Space Center, Houston, TX, United States)
Abstract: Sample return missions require chemical contamination to be minimized and potential sources of contamination to be documented and preserved for future use. Genesis focused on and successfully accomplished the following: - Early involvement provided input to mission design: a) cleanable materials and cleanable design; b) mission operation parameters to minimize contamination during flight. - Established contamination control authority at a high level and developed knowledge and respect for contamination control across all institutions at the working level. - Provided state-of-the-art spacecraft assembly cleanroom facilities for science canister assembly and function testing. Both particulate and airborne molecular contamination was minimized. - Using ultrapure water, cleaned spacecraft components to a very high level. Stainless steel components were cleaned to carbon monolayer levels (10 (sup 15) carbon atoms per square centimeter). - Established long-term curation facility Lessons learned and areas for improvement, include: - Bare aluminum is not a cleanable surface and should not be used for components requiring extreme levels of cleanliness. The problem is formation of oxides during rigorous cleaning. - Representative coupons of relevant spacecraft components (cut from the same block at the same time with identical surface finish and cleaning history) should be acquired, documented and preserved. Genesis experience suggests that creation of these coupons would be facilitated by specification on the engineering component drawings. - Component handling history is critical for interpretation of analytical results on returned samples. This set of relevant documents is not the same as typical documentation for one-way missions and does include data from several institutions, which need to be unified. Dedicated resources need to be provided for acquiring and archiving appropriate documents in one location with easy access for decades. - Dedicated, knowledgeable contamination control oversight should be provided at sites of fabrication and integration. Numerous excellent Genesis chemists and analytical facilities participated in the contamination oversight; however, additional oversight at fabrication sites would have been helpful.
Publication Date: Feb 24, 2016
Document ID:
20160002409
(Acquired Mar 01, 2016)
Subject Category: EXOBIOLOGY
Report/Patent Number: JSC-CN-35100
Document Type: Technical Report
Financial Sponsor: NASA Johnson Space Center; Houston, TX, United States
Organization Source: NASA Johnson Space Center; Houston, TX, United States
Description: 41p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution as joint owner in the copyright
NASA Terms: CLEANING; GENESIS MISSION; SOLAR WIND; ACCUMULATORS; SAMPLE RETURN MISSIONS; SAMPLES; LESSONS LEARNED; PLANETARY PROTECTION; CONTAMINATION; ALUMINUM; CANS; SURFACE TREATMENT; PARTICULATES; SPACECRAFT COMPONENTS; CARBON; STAINLESS STEELS; OXIDES; SURFACE FINISHING; WATER; MISSION PLANNING
Miscellaneous Notes: Excerpts from an Astromaterials Research & Exploration Science document written April 2002
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