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J-GLOBAL ID：201301093277942347   Update date: Feb. 04, 2025

Ken-ichi Bajo

Ken-ichi Bajo
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Affiliation and department：
Hokkaido University Creative Research Institution

About Hokkaido University Creative Research Institution


Homepage URL  (1)： https://sites.google.com/eis.hokudai.ac.jp/kbajo/%E3%83%9B%E3%83%BC%E3%83%A0
Research field  (1)： Space and planetary science
Research keywords  (5)： Secondary Ion Mass Spectrometry ,  Isotope ,  Planetary science ,  Mass Spectrometry ,  Noble gas
Research theme for competitive and other funds  (7)：
  • 2021 - 2026 Solar activities from pre-main-sequence stage to present
  • 2021 - 2024 Solar activity change between stages of protosun and main-sequense
  • 2020 - 2023 マントルウェッジにおける沈み込み由来炭素の探索
  • 2020 - 2023 Noble gas isotope analysis for individual presolar grain to study environment of interstellar material
  • 2015 - 2018 Activity of the proto-Sun revealed by multi-isotope analyses
Show all
Papers (42)：
  • Tomoya Obase, Ken-ichi Bajo, Yuta Otsuki, Hisayoshi Yurimoto. Extreme Solar Particle Ejection Event in the Last Few Million Years from Asteroid Itokawa Sample. The Astrophysical Journal. 2025. 978. 2. 142-142
  • Fridolin Spitzer, Thorsten Kleine, Christoph Burkhardt, Timo Hopp, Tetsuya Yokoyama, Yoshinari Abe, Jérôme Aléon, Conel M. O’D Alexander, Sachiko Amari, Yuri Amelin, et al. The Ni isotopic composition of Ryugu reveals a common accretion region for carbonaceous chondrites. Science Advances. 2024. 10. 39
  • Hiroharu Yui, Shu-hei Urashima, Morihiko Onose, Mayu Morita, Shintaro Komatani, Izumi Nakai, Yoshinari Abe, Yasuko Terada, Hisashi Homma, Kazuko Motomura, et al. Pyrrhotites in asteroid 162173 Ryugu: Records of the initial changes on their surfaces with aqueous alteration. Geochimica et Cosmochimica Acta. 2024. 379. 172-183
  • Ken-ichi Bajo, Hisayoshi Yurimoto. Nanoscale analysis of noble gas in solids. Journal of Analytical Science and Technology. 2024. 15. 1
  • Ken-ichi Bajo, Noriyuki Kawasaki, Isao Sakaguchi, Taku T. Suzuki, Satoru Itose, Miyuki Matsuya, Morio Ishihara, Kiichiro Uchino, Hisayoshi Yurimoto. In Situ Helium Isotope Microimaging of Meteorites. Analytical Chemistry. 2024. 96. 13. 5143-5149
ｍore...
MISC (42)：
  • Sohei Wada, Ken-ichi Bajo, Hisayoshi Yurimoto. VISUALIZATION OF SEDIMENTARY STRUCTURE IN CHONDRITE BY 2-D HELIUM IMAGING. METEORITICS & PLANETARY SCIENCE. 2022. 57
  • 大槻悠太, 馬上謙一, 圦本尚義. Development of in-situ Analysis for Extraterrestrial Particles with Isotope Nanoscope. 質量分析総合討論会講演要旨集. 2021. 69th
  • 和田壮平, 馬上謙一, 圦本尚義. Development of large-area imaging of helium isotope by SNMS using post ionization by a femto-second laser. 日本地球化学会年会要旨集(Web). 2021. 68th
  • Wataru Fujiya, Yoshihiro Furukawa, Haruna Sugahara, Mizuho Koike, Ken-ichi Bajo, Nancy L. Chabot, Yayoi N. Miura, Frederic Moynier, Sara S. Russell, Shogo Tachibana, et al. Analytical Protocols for Phobos Regolith Samples Returned by the Martian Moons Exploration (MMX) Mission. Abstracts of Annual Meeting of the Geochemical Society of Japan. 2020. 67. 88
  • Hisayoshi Yurimoto, Ken-ichi Bajo. Study of the Solar Wind by Secondary Neutral Mass Spectroscopy Using Post Ionization by a Femto-Second Laser. The review of laser engineering. 2020. 48. 8. 441-446
ｍore...
Lectures and oral presentations  (4)：
  • 同位体ナノスコープを用いた地球外物質の局所ヘリウム分析
    (マイクロビームアナリシス技術部会第5回研究会 2021)
  • 二次イオン質量分析法と宇宙地球化学への応用
    (2020年 日本地球化学会 ショートコース (オンライン) 2020)
  • SNMSを用いた太陽風起源希ガスの深さ方向分析
    (日本鉄鋼協会 評価・分析・解析部会 2017)
  • 小惑星「イトカワ」の微粒子解析に貢献するNI PXIモジュール式計測器
    (NIDays 2013 2013)
Education (2)：
  • 2006 - 2011 University of Tokyo
  • 2002 - 2006 Tokyo University of Science
Professional career (1)：
  • 博士(理学) (東京大学)
Work history (4)：
  • 2014/02 - 現在 Hokkaido University Graduate School of Science
  • 2013/06 - 2014/01 Hokkaido University Creative Research Institution
  • 2011/04 - 2013/05 Hokkaido University
  • 2009/04 - 2011/03 The University of Tokyo Graduate School of Science Department of Earth and Planetary Science
Association Membership(s) (3)：
The Meteoritical Society ,  THE MASS SPECTROMETRY SOCIETY OF JAPAN ,  GEOCHEMICAL SOCIETY OF JAPAN
※ Researcher’s information displayed in J-GLOBAL is based on the information registered in researchmap. For details, see here.

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