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Investigation of superionic states in planetary interiors by neutron diffraction experiments at high temperatures and pressures

Research Project

Project/Area Number 20H01998
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 17040:Solid earth sciences-related
Research InstitutionJapan Atomic Energy Agency

Principal Investigator

Sano Asami  国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 J-PARCセンター, 研究主幹 (30547104)

Co-Investigator(Kenkyū-buntansha) 河野 義生  関西学院大学, 関西学院大学, 教授 (20452683)
大平 格  学習院大学, 理学部, 助教 (90873159)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥15,340,000 (Direct Cost: ¥11,800,000、Indirect Cost: ¥3,540,000)
Fiscal Year 2022: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2021: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2020: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Keywords高温高圧 / 中性子回折 / 高圧 / 中性子 / 高圧力 / 中性子散乱実験 / 氷 / 超イオン伝導 / 中性子散乱
Outline of Research at the Start

本研究は、高温高圧下中性子その場観察実験により氷、含水鉱物の高温下におけるダイナミックな水素の動きを直接捉えようとするものである。そのために、J-PARC MLFの超高圧中性子回折装置PLANETにおいて新しく中性子実験用の2段式加圧セルを開発し、これまで未踏の領域であった50万気圧を越える圧力での高温実験を実現する。

Outline of Final Research Achievements

This study aimed to directly observe the position of hydrogen in ices and hydrous phases under planetary interior conditions using in-situ neutron diffraction experiments at high temperatures and pressures. We explored the feasibility of introducing a new double-stage compression cell at the PLANET beamline at J-PARC MLF. Pressure generation tests confirmed high-efficiency pressure generation using cells with Mn-based Null-Alloy or duralumin gaskets, achieving pressures up to 48 GPa. Neutron diffraction experiments investigated the differences in background noise and signal intensity based on the geometry, establishing an optimal setup method. These findings will be used to continue the development of a new research project.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果は、天体内部条件下における水素の挙動を直接観察する新たな手法を提供するものであり、惑星科学や地球科学において重要な学術的意義を持つ。特に、高温高圧条件下での氷や含水鉱物の挙動解明は、地球や他の惑星の内部構造や進化過程の理解に寄与する。また、超高圧下での中性子実験技術の発展は、材料科学や物理学にも波及効果をもたらし、新材料の開発や既存材料の特性評価などへも応用が広がることが期待される。

Report

(4 results)
  • 2023 Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (7 results)

All 2024 2023 2021 2020

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (4 results) (of which Int'l Joint Research: 1 results,  Invited: 4 results)

  • [Journal Article] Neutron diffraction: a primer2024

    • Author(s)
      Richard Dronskowski, Thomas Brucke, Holger Kohlmann, Maxim Avdeev, Andreas Houben, Martin Meven, Michael Hofmann , Takashi Kamiyama, Mirijam Zobel, Werner Schweika, Raphael P. Hermann, Asami Sano-Furukawa
    • Journal Title

      Zeitschrift fur Kristallographie - Crystalline Materials

      Volume: 0 Issue: 5-6 Pages: 1-28

    • DOI

      10.1515/zkri-2024-0001

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] High-pressure and high-temperature neutron-diffraction experiments using Kawai-type multi-anvil assemblies2021

    • Author(s)
      Sano-Furukawa Asami、Kakizawa Sho、Shito Chikara、Hattori Takanori、Machida Shinichi、Abe Jun、Funakoshi Ken-ichi、Kagi Hiroyuki
    • Journal Title

      High Pressure Research

      Volume: 41 Issue: 1 Pages: 65-74

    • DOI

      10.1080/08957959.2020.1867723

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Structural Evolution of SiO2 Glass with Si Coordination Number Greater than 62020

    • Author(s)
      Kono Yoshio、Shu Yu、Kenney-Benson Curtis、Wang Yanbin、Shen Guoyin
    • Journal Title

      Physical Review Letters

      Volume: 125 Issue: 20 Pages: 205701-205701

    • DOI

      10.1103/physrevlett.125.205701

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] High pressure experiments in PLANET and its applications2023

    • Author(s)
      Asami Sano-Furukawa
    • Organizer
      Workshop on Extreme Sciences for Space Matters and Materials
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 高温高圧中性子実験による地球深部物質科学の展開2023

    • Author(s)
      佐野亜沙美,服部高典, 阿部淳, 町田真一, 有馬寛, 舟越賢一
    • Organizer
      第60回高圧討論会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Recent developments of neutron diffraction at mantle PT conditions at PLANET2021

    • Author(s)
      Asami Sano-Furukawa
    • Organizer
      10th Asian Conference on High Pressure Research,
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Investigation of hydrogen bonding in minerals under high pressure and high temperature using neutron diffraction2021

    • Author(s)
      Asami Sano-Furukawa
    • Organizer
      Conference on Science at Extreme Conditions (CSEC-2021)
    • Related Report
      2021 Annual Research Report
    • Invited

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Published: 2020-04-28   Modified: 2025-01-30  

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