Gamma-ray irradiation of optical glass for the development of LIBS for future planetary missions

en	SATO, Shin-ichiro SATO, Shinichiro National Institutes for Quantum Science and Technology (QST)
ja	佐藤, 真一郎量子科学技術研究開発機構

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今泉, 充

en	IMAIZUMI, Mitsuru Sanjo City University
ja	今泉, 充三条市立大学

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Graduate School of Science, The University of Tokyo(en), Graduate School of Science, The University of Tokyo(en), Graduate School of Frontier Sciences, The University of Tokyo(en), Research and Development Directorate, Japan Aerospace Exploration Agency (JAXA)(en), Research and Development Directorate, Japan Aerospace Exploration Agency (JAXA)(en), Topcon Corporation(en), Topcon Corporation(en), Topcon Corporation(en), Topcon Corporation(en), National Institutes for Quantum Science and Technology (QST)(en), Sanjo City University(en)
東京大学大学院理学系研究科(ja), 東京大学大学院理学系研究科(ja), 東京大学大学院新領域創成科学研究科(ja), 宇宙航空研究開発機構研究開発部門 (JAXA)(ja), 宇宙航空研究開発機構研究開発部門(JAXA)(ja), 株式会社トプコン(ja), 株式会社トプコン(ja), 株式会社トプコン(ja), 株式会社トプコン(ja), 量子科学技術研究開発機構(QST)(ja), 三条市立大学(ja)

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Japan Aerospace Exploration Agency (JAXA)(en)
宇宙航空研究開発機構 (JAXA)(ja)

書誌情報

en : JAXA Research and Development Report
ja : 宇宙航空研究開発機構研究開発報告

巻 JAXA-RR-23-006E, ページ数 11, 発行日 2024-02-14

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In-situ chemical analysis has provided fundamental information on the origin and history of planetary bodies. On rocky bodies, laser-induced breakdown spectroscopy (LIBS) has proven its utility over the last decade. LIBS enables quantitative chemical measurement of samples by analyzing emission spectra from laser-induced plasma. We are currently developing a compact LIBS instrument for future landing missions; however, optical glass experiences degradation in transmittance owing to radiation (the browning effect). We conducted gamma-ray radiation experiments using a Co-60 source to assess radiation-induced transmittance changes in four optical glass materials (Ohara S-LAM3, S-NBH53V, S-TIM27, and S-TIH53W), including those incorporated in the spectrometer we are developing. We applied irradiation doses of 10–10,000 Gy (1–1,000 krad), which are comparable to 0.5–500 years in Martian orbit. Post-irradiation transmission was measured to evaluate the timescale of the recovery in transmittance. Our results indicate that transmittance across wavelengths of 380–1,000 nm decreases in all tested glass materials, with more pronounced decreases at higher doses and shorter wavelengths. Transmittance levels recovered over time, reaching > 95% of their initial values on 365 days after exposure to a 100 Gy dose. The estimated recovery timescales for the materials were 60–130 days. When subjected to a 100 Gy dose, the overall transmission of our spectrometer remained at > 80% of its original, unirradiated value. This suggests that the glass materials used in our LIBS spectrometer are sufficiently resistant to radiation for planetary exploration missions. This study provides crucial data on the radiation resistance of these glasses, aiding the design of optical instruments intended for use in space exploration missions.

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Physical characteristics: Original contains color illustrations

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形態: カラー図版あり

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2433-2216

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VoR

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http://purl.org/coar/version/c_970fb48d4fbd8a85

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2023-11-30

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2024-02-09 08:04:27.262786

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