Hayabusa Sample Curation in the JAXA's Planetary Material Curation Facility

Details Hayabusa Sample Curation in the JAXA's Planetary Material Curation Facility Hayabusa Sample Curation in the JAXA's Planetary Material Curation Facility

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p43a1654o&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #P43A-1654

Physics

[6015] Planetary Sciences: Comets And Small Bodies / Dust, [6045] Planetary Sciences: Comets And Small Bodies / Physics And Chemistry Of Materials, [6205] Planetary Sciences: Solar System Objects / Asteroids, [6213] Planetary Sciences: Solar System Objects / Dust

Scientific paper

Hayabusa has successfully returned its reentry capsule in Australia on June 13th, 2010. As detailed previously [1], a series of processes have been held in the JAXA's Planetary Material Curation Facility to introduce the sample container of reentry capsule into the pure nitrogen filled clean chamber without influence by water or oxygen, retrieve fine particles found inside the container, characterize them with scanning electron microscope (SEM) with energy dispersive X-ray spectroscopy (EDX), classify them into mineral or rock types, and store them for future analysis. Some of those particles are delivered for initial analysis to catalogue them [2-10]. The facility is demanded to develop new methodologies or train techniques to pick up the recovered samples much finer than originally expected One of them is the electrostatic micro-probe for pickups, and .a trial started to slice the fine samples for detailed analysis of extra-fine structures. Electrostatic nano-probe to be used in SEM is also considered and developed.. To maximize the scientific outputs, the analyses must go on .based on more advanced methodology or sophisticated ideas. So far we have identified those samples as materials from S-class asteroid 25143 Itokawa due to their consistency with results by remote near-infrared and X-rsy spectroscopy: about 1500 ultra-fine particles (mostly smaller than 10 microns) caught by Teflon spatula scooping, and about 100 fine particles (mostly 20-200 microns) collected by compulsory fall onto silica glass plates. Future schedule for sample distribution must be planned. The initial analyses are still in progress, and we will distribute some more of particles recovered. Then some part of the particles will be distributed to NASA, based on the Memorandum of Understanding (MOU) between Japan and U.S.A. for the Hayabusa mission. Finally, in the near future an international Announcement of Opportunity (AO) for sample analyses will be open to any interested researchers In the presentation, functions in the JAXA's Planetary Material Curation Facility will be briefly described as well as the current achievement in methodology and future plan. Scientific outputs will be summarized for our understanding the solar system evolution.

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