Development of Genesis Solar Wind Sample Cleanliness Assessment: Initial Report on Sample 60341 Optical Imagery and Elemental MappingSince 2005 the Genesis science team has experimented with techniques for removing the contaminant particles and films from the collection surface of the Genesis fragments. A subset of ~40 samples have been designated as "cleaning matrix" samples. These are small samples to which various cleaning approaches are applied and then cleanliness is assessed optically, by TRXRF, SEM, ToF-SIMS, XPS, ellipsometry or other means [1-9]. Most of these sam-ples remain available for allocation, with cleanliness assessment data. This assessment allows evaluation of various cleaning techniques and handling or analytical effects. Cleaning techniques investigated by the Genesis community include acid/base etching, acetate replica peels, ion beam, and CO2 snow jet cleaning [10-16]. JSC provides surface cleaning using UV ozone exposure and ultra-pure water (UPW) [17-20]. The UPW rinse is commonly used to clean samples for handling debris between processing by different researchers. Optical microscopic images of the sample taken before and after UPW cleaning show what has been added or removed during the cleaning process.
Document ID
20140006551
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Gonzalez, C. P. (Jacobs Technologies Engineering Science Contract Group Houston, TX, United States)
Goreva, Y. S. (Smithsonian Institution Washington, DC, United States)
Burnett, D. S. (California Inst. of Tech. Pasadena, CA, United States)
Woolum, D. (California State Univ. Fullerton, CA, United States)
Jurewicz, A. J. (Arizona State Univ. Tempe, AZ, United States)
Allton, J. H. (NASA Johnson Space Center Houston, TX, United States)
Rodriguez, P. J. (GeoControls Systems, Inc. Houston, TX, United States)
Burkett, P. J. (Jacobs Technologies Engineering Science Contract Group Houston, TX, United States)
Date Acquired
June 3, 2014
Publication Date
March 17, 2014
Subject Category
ExobiologySolar PhysicsLunar And Planetary Science And Exploration