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Title: 3D Fluorescent and Reflective Imaging of Whole Stardust Tracks in Aerogel

The NASA Stardust mission returned to earth in 2006 with the cometary collector having captured over 1,000 particles in an aerogel medium at a relative velocity of 6.1 km/s. Particles captured in aerogel were heated, disaggregated and dispersed along 'tracks' or cavities in aerogel, singular tracks representing a history of one capture event. It has been our focus to chemically and morphologically characterize whole tracks in 3-dimensions, utilizing solely non-destructive methods. To this end, we have used a variety of methods: 3D Laser Scanning Confocal Microscopy (LSCM), synchrotron X-ray fluorescence (SXRF), and synchrotron X-ray diffraction (SXRD). In the past months we have developed two new techniques to aid in data collection. (1) We have received a new confocal microscope which has enabled autofluorescent and spectral imaging of aerogel samples. (2) We have developed a stereo-SXRF technique to chemically identify large grains in SXRF maps in 3-space. The addition of both of these methods to our analytic abilities provides a greater understanding of the mechanisms and results of track formation.
Authors:
;  [1]
  1. (AMNH)
Publication Date:
OSTI Identifier:
1023026
Resource Type:
Conference
Resource Relation:
Conference: 42nd Lunar and Planetary Society Conference;March 7-11,2011;Woodlands, TX
Publisher:
Lunar and Planetary Science Conference XLII;SPIE;2640
Research Org:
Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
Sponsoring Org:
NSFNASA
Country of Publication:
United States
Language:
ENGLISH
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CAVITIES; FLUORESCENCE; LASERS; MICROSCOPES; MICROSCOPY; NASA; SYNCHROTRONS; VELOCITY; X-RAY DIFFRACTION