Curriculum Vitaes

Hidenori Kumagai

  (熊谷 英憲)

Profile Information

Affiliation
Professor, Faculty of Intercultural Studies, Department of Intercultural Communication, Gakushuin Women's College
Visiting Principal Scientist, Japan Agency for Marine-Earth Science and Technology
Degree
Ph.D(Univ. Tokyo)

J-GLOBAL ID
200901074165988576
researchmap Member ID
5000101557

Ph.D. in Earth and Planetary Physics (Graduate school of Science, the University of Tokyo)
MSc in Earth and Planetary Physics (Graduate school of Science, the University of Tokyo)
BSc in Geophysics (Faculty of Science, the University of Tokyo)


Education

 1

Papers

 81
  • Yuichiro Cho, Yayoi N. Miura, Hikaru Hyuga, Kenta Shimokoshi, Kazuo Yoshioka, Hiroyuki Kurokawa, Hidenori Kumagai, Naoyoshi Iwata, Satoshi Kasahara, Haruhisa Tabata, Mari Aida, Yoshifumi Saito, Seiji Sugita
    The Planetary Science Journal, 5(8) 187-187, Aug 1, 2024  
    Abstract The Martian atmospheric Ne may reflect recent gas supply from its mantle via volcanic degassing, due to its short (∼100 Myr) escape timescale. The isotopic ratio of the Martian atmospheric Ne would therefore provide insights into that of the Martian mantle, further suggesting the origin of Mars volatiles during planetary formation. Mass spectrometric analysis of the Martian atmospheric Ne, however, has faced challenges from interference between 20Ne+ and 40Ar++. Previous studies using a polyimide membrane for 20Ne/40Ar separation were limited by the drawbacks of elastomeric O-rings to support the membrane, such as low-temperature intolerance, outgassing, and the need to endure environmental conditions during the launch and before/after landing on Mars. This study proposes a new method employing a metal C-ring to secure a 100 μm polyimide sheet within vacuum flanges. Environmental tests, including vibration, shock, extreme temperatures, and radiation exposure, were conducted on the gas separation flanges. Pre- and post-test analyses for He, Ne, and Ar demonstrated the membrane-flange system’s resilience. Gas permeation measurements using terrestrial air effectively permeated 4He and 20Ne, while reducing 40Ar by more than six orders of magnitude. This study achieved a <3% accuracy in determining the 20Ne/22Ne ratio, sufficient for assessing the origins of Ne in the Martian mantle. Furthermore, experiments with a 590 Pa gas mixture simulating the Martian atmosphere achieved a 10% accuracy for the 20Ne/22Ne isotope ratio, with gas abundances consistent with numerical predictions based on individual partial pressures. These results validate the suitability of the developed polyimide membrane assembly for in situ Martian Ne analyses.
  • Hidenori Kumagai, Kazuutaka Mannen
    Bulletin of Gakushuin Women's College, 26 135-139, Mar, 2024  Lead authorCorresponding author
  • Rintaro Kimura, Kazutaka Mannen, Hidenori Kumagai, Yohei Matsui, Motoko Igisu, Yoshinori Takano
    Bunseki Kagaku, 72,(7.8) 249-256. (https://doi.org/10.2116/bunsekikagaku.72.249), Jul, 2023  Peer-reviewed
  • Yusuke Ohta, Takafumi Kasaya, Yoshifumi Kawada, Shuhei Totsuka-Shiiki, Hidenori Kumagai, Hisanori Iwamoto, Hideaki Machiyama, Koichi Iijima, Junji Kaneko
    BUTSURI-TANSA(Geophysical Exploration), 76 14-21, Mar, 2023  Peer-reviewed

Misc.

 28

Books and Other Publications

 3

Presentations

 68

Teaching Experience

 7

Major Professional Memberships

 8

Major Research Projects

 13
  • Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Japan Society for the Promotion of Science, Apr, 2021 - Mar, 2025
  • Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Japan Society for the Promotion of Science, 2008 - 2012
    ISHIBASHI Junichiro, KUMAGAI Hidenori, KOJIMA Shigeaki, TOYODA Shin, NAKAI Shunichi, ITAYA Tetsumaru, HASHIMOTO Tetsuo, WATANABE Hiromi, SUZUKI Yohei, FUJIKURA Katsunori, SATO Keiko, TAKAMASA Asako, OKUMURA Tasuku