Noble gas mass-spectrometry for extraterrestrial micro-samples: analyses of asteroid matter returned by Hayabusa2 JAXA mission

Alexander Meshik; Olga Pravdivtseva; Ryuji Okazaki; Kasumi Yogata; Toru Yada; Fumio Kitajima; Hisayoshi Yurimoto; Tomoki Nakamura; Takaaki Noguchi; Hikaru Yabuta; Hiroshi Naraoka; Kanako Sakamoto; Shogo Tachibana; Masahiro Nishimura; Aiko Nakato; Akiko Miyazaki; Masanao Abe; Tatsuaki Okada; Tomohiro Usui; Makoto Yoshikawa; Takanao Sakai; Satoshi Tanaka; Fuyuto Terui; Satoru Nakazawa; Seiichiro Watanabe; Yuichi Tsuda; Hayabusa2 Initial Analysis Volatile Team

doi:10.1039/D3JA00125C

Noble gas mass-spectrometry for extraterrestrial micro-samples: analyses of asteroid matter returned by Hayabusa2 JAXA mission†

Alexander Meshik,

*^a Olga Pravdivtseva,^a Ryuji Okazaki,^b Kasumi Yogata,^c Toru Yada,^c Fumio Kitajima,^b Hisayoshi Yurimoto,^d Tomoki Nakamura,^e Takaaki Noguchi,^f Hikaru Yabuta,^g Hiroshi Naraoka,^b Kanako Sakamoto,^c Shogo Tachibana,^ch Masahiro Nishimura,^c Aiko Nakato,^c Akiko Miyazaki,

^c Masanao Abe,^c Tatsuaki Okada,^c Tomohiro Usui,^c Makoto Yoshikawa,^c Takanao Sakai,^c Satoshi Tanaka,^c Fuyuto Terui,ⁱ Satoru Nakazawa,^c Seiichiro Watanabe,

^j Yuichi Tsuda^c and Hayabusa2 Initial Analysis Volatile Team

Author affiliations

* Corresponding authors

^a Physics Department, Washington University, Saint Louis, MO, USA
E-mail: ameshik@physics.wustl.edu

^b Department of Earth and Planetary Sciences, Kyushu University, Fukuoka, Japan

^c Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara, Japan

^d Department of Earth and Planetary Sciences, Hokkaido University, Sapporo, Japan

^e Department of Earth Science, Tohoku University, Sendai, Japan

^f Division of Earth and Planetary Sciences, Kyoto University, Kyoto, Japan

^g Department of Earth and Planetary Systems Science, Hiroshima University, Higashi-Hiroshima, Japan

^h UTokyo Organization for Planetary and Space Science, The University of Tokyo, Tokyo, Japan

ⁱ Kanagawa Institute of Technology, Atsugi 243-0292, Japan

^j Department of Earth and Environmental Sciences, Nagoya University, Nagoya, Japan

Abstract

Mass spectrometry of noble gas isotopes extracted from limited amounts of extraterrestrial materials delivered by robotic space missions requires high sensitivity, high ion transmission, low detection limit, and several other characteristics not readily available in commercial instruments. We compared two different configurations of electron impact ionisation. We concluded that the ion source with cylindrical symmetry and without a magnetic field in the ionisation region is better for analyzing all stable noble gas isotopes extracted from sub-milligram extraterrestrial samples. Isotopic analyses of noble gases retrieved using multi-step heating of sub-mg samples delivered from near-Earth (162 173) asteroid Ryugu support this conclusion.

Journal of Analytical Atomic Spectrometry

Noble gas mass-spectrometry for extraterrestrial micro-samples: analyses of asteroid matter returned by Hayabusa2 JAXA mission†

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