2:00 PM - 2:15 PM
[PPS03-25] Development of analytical method of Haybusa2 returned samples by multi-agency collaboration.
Keywords:Hayabusa2, analysis of returned samples
On the bases of the experiences of such previous issues, we started the development of techniques and devices for the handling, transfer and analysis of samples returned by Hayabusa2 spacecraft from 2015, by organizing a special team constituting of members of Japan Aerospace Exploration Agency (JAXA), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Institute for Molecular Sciences (IMS), SPring-8 and National Institute of Polar Research (NIPR). Our activity includes development of sample container for distribution of samples with inter-facility transfer, atmosphere shielding sample holder, sample holder applicable for multiple analytical devices, and trial examinations of those developed devices through the analysis of extraterrestrial materials.
In this presentation, we report the results of sequential analysis of Antarctic micro-meteorites (AMMs) which simulated the small returned particles of Hayabusa2 returned samples, as the first step of a series of flow test. 10 Antarctic micrometeorites provided by NIPR were imaged by synchrotron radiation computed tomography (SR-CT) and x-ray diffraction (XRD) at SPring-8, and investigated by high resolution field emission scanning electron microscopy and energy dispersive spectroscopy (FE-SEM-EDS) system at IMS. Through the series of non-destructive analysis, we selected AMMs those having similar characteristics of carbonaceous chondrites, and formed thin sections by focused ion beam (FIB) for the characterization of organic materials by scanning transmitted x-ray microscopy and near edge x-ray absorption fine structure analysis (STXM-NEXAFS) at IMS, high resolution analysis by transmission electron microscopy (TEM), and isotopic analysis of light elements such as hydrogen, carbon, nitrogen and oxygen by secondary ion mass spectrometry (SIMS) at JAMSTEC.
We will also show the future plan of the developments and trial examinations. We will operate the rehearsals using mm-sized Antarctic meteorites simulating anlaysis of large particles of the Hayabusa2 returned samples, along with the development of sample fabrication methods and data sharing process of sequential analysis.