Curriculum Vitaes
Profile Information
- Affiliation
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
- Degree
- 博士(理学)(Mar, 2011, 青山学院大学)
- ORCID ID
https://orcid.org/0000-0001-9307-046X- J-GLOBAL ID
- 201801006299578336
- researchmap Member ID
- B000303523
Research Interests
6Research Areas
2Research History
4-
Jul, 2019 - Present
-
Apr, 2017 - May, 2019
-
Apr, 2012 - 2017
-
Apr, 2011 - Apr, 2012
Awards
1-
Mar, 2018
Papers
111-
Journal of Space Science Informatics Japan, Mar, 2024 Peer-reviewedCorresponding author
-
Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023), Aug 14, 2023
-
Scientific reports, 12(1) 16300-16300, Oct 11, 2022Relativistic electron precipitation (REP) from the Earth's radiation belt plays an important role in mesospheric ozone loss as a connection between space weather and the climate system. However, the rapid (tens of minutes) destruction of mesospheric ozone directly caused by REP has remained poorly understood due to the difficulty of recognizing its location and duration. Here we show a compelling rapid correspondence between localized REP and ozone destruction during a specific auroral phenomenon, the called an isolated proton aurora (IPA). The IPA from the Earth's radiation belt becomes an important spatial and temporal proxy of REP, distinct from other auroral phenomena, and allowing visualizing micro-ozone holes. We found ozone destruction of as much as 10-60% within 1.5 h of the initiation of IPA. Electromagnetic ion cyclotron waves in the oxygen ion band observed as the driver of REP likely affect through resonance with mainly ultra-relativistic (> 2 mega-electron-volts) energy electrons. The rapid REP impact demonstrates its crucial role and direct effect on regulating the atmospheric chemical balance.
-
Physical Review Letters, 129(10), Sep 1, 2022 Peer-reviewed
-
The Astrophysical Journal, 933(1) 85-85, Jul 1, 2022Abstract The CALorimetric Electron Telescope (CALET) on the International Space Station consists of a high-energy cosmic-ray CALorimeter (CAL) and a lower-energy CALET Gamma-ray Burst Monitor (CGBM). CAL is sensitive to electrons up to 20 TeV, cosmic-ray nuclei from Z = 1 through Z ∼ 40, and gamma rays over the range 1 GeV–10 TeV. CGBM observes gamma rays from 7 keV to 20 MeV. The combined CAL-CGBM instrument has conducted a search for gamma-ray bursts (GRBs) since 2015 October. We report here on the results of a search for X-ray/gamma-ray counterparts to gravitational-wave events reported during the LIGO/Virgo observing run O3. No events have been detected that pass all acceptance criteria. We describe the components, performance, and triggering algorithms of the CGBM—the two Hard X-ray Monitors consisting of LaBr3(Ce) scintillators sensitive to 7 keV–1 MeV gamma rays and a Soft Gamma-ray Monitor BGO scintillator sensitive to 40 keV–20 MeV—and the high-energy CAL consisting of a charge detection module, imaging calorimeter, and the fully active total absorption calorimeter. The analysis procedure is described and upper limits to the time-averaged fluxes are presented.
Misc.
28-
日本物理学会講演概要集(CD-ROM), 76(1), 2021
-
日本物理学会講演概要集(CD-ROM), 75(2), 2020
-
Journal of Physics: Conference Series, 1181(1), Mar 10, 2019 Peer-reviewed© Published under licence by IOP Publishing Ltd. The CALorimetric Electron Telescope (CALET) is a high-energy astroparticle physics space experiment installed on the International Space Station (ISS), developed and operated by Japan in collaboration with Italy and the United States. The CALET mission goals include the investigation of possible nearby sources of high-energy electrons, of the details of galactic particle acceleration and propagation, and of potential signatures of dark matter. CALET measures the cosmic-ray electron+positron flux up to 20 TeV, gamma-rays up to 10 TeV, and nuclei with Z=1 to 40 up to 1, 000 TeV for the more abundant elements during a long-term observation aboard the ISS. Starting science operation in mid-October 2015, CALET performed continuous observation without major interruption with close to 20 million triggered events over 10 GeV per month. Based on the data taken during the first two-years, we present an overview of CALET observations: 1) Electron+positron energy spectrum, 2) Nuclei analysis, 3) Gamma-ray observation including a characterization of on-orbit performance. Results of the electromagnetic counterpart search for LIGO/Virgo gravitational wave events are discussed as well.
Presentations
163-
Meeting Abstracts of the Physical Society of Japan, 2011, The Physical Society of Japan
-
Meeting Abstracts of the Physical Society of Japan, 2011, The Physical Society of Japan
Professional Memberships
1Works
2-
May 1, 2018 - Present Web Service
-
Oct 1, 2011 - Present Web Service
Research Projects
2-
Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2013 - Mar, 2017
-
Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Jun, 2012 - Mar, 2017
Media Coverage
1-
https://www.isas.jaxa.jp/topics/003206.html, Oct, 2022
