Curriculum Vitaes
Profile Information
- Affiliation
- Professor, Institute of Space and Astronautical Science, Japan Aerospace Exploration AgencyProfessor, School of Physical Sciences, The Graduate University for Advanced StudiesVisiting Professor, Graduate School of Science and Engineering, Aoyama Gakuin University
- Degree
- Doctor of Science(Feb, 1991, The University of Tokyo)
- J-GLOBAL ID
- 200901011121067404
- researchmap Member ID
- 1000013960
「初期宇宙の素粒子的描像での理解」を目指して低エネルギー反粒子宇宙線観測気球実験に参画。2006年からは自ら気球実験を実施してきた経験をベースに，日本で唯一気球実験を運営しているJAXA宇宙科学研究所の教授に着任し，大気球実験の実施責任者として大学の研究者等による宇宙科学研究を推進している。大気球，観測ロケットといった小型飛翔体による科学成果の創出に加えて宇宙科学研究を場とした幅広い人材育成への貢献にも取り組んでいる。
Major Research Interests
25Research Areas
2Research History
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Oct, 1996 - Mar, 1997
Education
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Apr, 1985 - Feb, 1991
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Apr, 1981 - Mar, 1985
Committee Memberships
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Feb, 2013 - Jan, 2015
Awards
1Papers
213-
Journal of Evolving Space Activities, 2 177, Oct 24, 2024 Peer-reviewed
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Physical Review Letters, 132(13), Mar 25, 2024 Peer-reviewed
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Journal of Evolving Space Activities, 1 77, Dec, 2023 Peer-reviewed
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Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023), 444, Sep 27, 2023
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Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023), 444, Aug 9, 2023
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Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023), 444, Aug 5, 2023
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Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023), 444, Aug 5, 2023
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Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023), 444, Jul 25, 2023
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J. Evolving Space Activities, 1, Apr, 2023 Peer-reviewed
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Journal of Evolving Space Activities, 1 n/a, Apr, 2023 Peer-reviewedThe General Antiparticle Spectrometer (GAPS) is a balloon-borne experiment that aims to measure low-energy cosmicray antiparticles. GAPS has developed a new antiparticle identification technique based on exotic atom formation caused by incident particles, which is achieved by ten layers of Si(Li) detector tracker in GAPS. The conventional analysis uses the physical quantities of the reconstructed incident and secondary particles. In parallel with this, we have developed a complementary approach based on deep neural networks. This paper presents a new convolutional neural network (CNN) technique. A three-dimensional CNN takes energy depositions as three-dimensional inputs and learns to identify their positional/energy correlations. The combination of the physical quantities and the CNN technique is also investigated. The findings show that the new technique outperforms existing machine learning-based methods in particle identification.
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Astroparticle Physics, 145 102791-102791, 2023
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Journal of Low Temperature Physics, 209(3-4) 396-408, Sep 5, 2022
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Proceedings of Science, 395, Mar 18, 2022
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Proceedings of Science, 395, Mar 18, 2022
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Proceedings of Science, 395, Mar 18, 2022
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Proceedings of Science, 395, Mar 18, 2022
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Proceeding of Science (ICRC2021), 132, 2022
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Proceeding of Science (ICRC2021), 395 136, 2022
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Proceeding of Science (ICRC2021), 504, 2022
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Astroparticle Physics, 130 102580-102580, Mar, 2021 Peer-reviewed
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Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave, Dec 21, 2020
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Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X, Dec 16, 2020
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Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave, Dec 15, 2020
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J Low Temp Phys, Jan 6, 2020 Peer-reviewedRecent developments of transition-edge sensors (TESs), based on extensive experience in ground-based experiments, have been making the sensor techniques mature enough for their application on future satellite CMB polarization experiments. LiteBIRD is in the most advanced phase among such future satellites, targeting its launch in Japanese Fiscal Year 2027 (2027FY) with JAXA's H3 rocket. It will accommodate more than 4000 TESs in focal planes of reflective low-frequency and refractive medium-and-high-frequency telescopes in order to detect a signature imprinted on the cosmic microwave background (CMB) by the primordial gravitational waves predicted in cosmic inflation. The total wide frequency coverage between 34GHz and 448GHz enables us to extract such weak spiral polarization patterns through the precise subtraction of our Galaxy's foreground emission by using spectral differences among CMB and foreground signals. Telescopes are cooled down to 5Kelvin for suppressing thermal noise and contain polarization modulators with transmissive half-wave plates at individual apertures for separating sky polarization signals from artificial polarization and for mitigating from instrumental 1/f noise. Passive cooling by using V-grooves supports active cooling with mechanical coolers as well as adiabatic demagnetization refrigerators. Sky observations from the second Sun-Earth Lagrangian point, L2, are planned for three years. An international collaboration between Japan, USA, Canada, and Europe is sharing various roles. In May 2019, the Institute of Space and Astronautical Science (ISAS), JAXA selected LiteBIRD as the strategic large mission No. 2.
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Proceeding of Science (ICRC2019), 37, 2020
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Journal of Cosmology and Astroparticle Physics, 2020(8) 035-035, Aug 18, 2020 Peer-reviewed
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TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN, 18(3) 44-50, 2020 Peer-reviewed
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Dec, 2018Experiments aiming to directly detect dark matter (DM) particles have yet to make robust detections, thus underscoring the need for complementary approaches such as searches for new particles at colliders, and indirect DM searches in cosmic-ray spectra. Low energy (< 0.25 GeV/n) cosmic-ray antiparticles such as antideuterons are strong candidates for probing DM models, as the yield of these particles from DM processes can exceed the astrophysical background by more than two orders of magnitude. The General Antiparticle Spectrometer (GAPS), a balloon borne cosmic-ray detector, will perform an ultra-low background measurement of the cosmic antideuteron flux in the regime < 0.25 GeV/n, which will constrain a wide range of DM models. GAPS will also detect approximately 1000 antiprotons in an unexplored energy range throughout one long duration balloon (LDB) flight, which will constrain < 10 GeV DM models and validate the GAPS detection technique. Unlike magnetic spectrometers, GAPS relies on the formation of an exotic atom within the tracker in order to identify antiparticles. The GAPS tracker consists of ten layers of lithium-drifted silicon detectors which record dE/dx deposits from primary and nuclear annihilation product tracks, as well as measure the energy of the exotic atom deexcitation X-rays. A two-layer, plastic scintillator time of flight (TOF) system surrounds the tracker and measures the particle velocity, dE/dx deposits, and provides a fast trigger to the tracker. The nuclear annihilation product multiplicity, deexcitation X-ray energies, TOF, and stopping depth are all used together to discern between antiparticle species. This presentation provided an overview of the GAPS experiment, an update on the construction of the tracker and TOF systems, and a summary of the expected performance of GAPS in light of the upcoming LDB flight from McMurdo Station, Antarctica in 2020....
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Dec, 2018The General Antiparticle Spectrometer (GAPS) is designed to carry out indirect dark matter search by measuring low-energy cosmic-ray antiparticles. Below a few GeVs the flux of antiparticles produced by cosmic-ray collisions with the interstellar medium is expected to be very low and several well-motivated beyond-standard models predict a sizable contribution to the antideuteron flux. GAPS is planned to fly on a long-duration balloon over Antarctica in the austral summer of 2020. The primary detector is a 1m3 central volume containing planes of Si(Li) detectors. This volume is surrounded by a time-of-flight system to both trigger the Si(Li) detector and reconstruct the particle tracks. The detection principle of the experiment relies on the identification of the antiparticle annihilation pattern. Low energy antiparticles slow down in the apparatus and they are captured in the medium to form exotic excited atoms, which de-excite by emitting characteristic X-rays. Afterwards they undergo nuclear annihilation, resulting in a star of pions and protons. The simultaneous measurement of the stopping depth and the dE/dx loss of the primary antiparticle, of the X-ray energies and of the star particle-multiplicity provides very high rejection power, that is critical in rare-event search. GAPS will be able to perform a precise measurement of the cosmic antiproton flux below 250 MeV, as well as a sensitive search for antideuterons....
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Sep, 2018The General AntiParticle Spectrometer (GAPS) is a balloon-borne instrument designed to detect cosmic-ray antimatter using the novel exotic atom technique, obviating the strong magnetic fields required by experiments like AMS, PAMELA, or BESS. It will be sensitive to primary antideuterons with kinetic energies of $\approx0.05-0.2$ GeV/nucleon, providing some overlap with the previously mentioned experiments at the highest energies. For $3\times35$ day balloon flights, and standard classes of primary antideuteron propagation models, GAPS will be sensitive to $m_{\mathrm{DM } }\approx10-100$ GeV c$^{-2}$ WIMPs with a dark-matter flux to astrophysical flux ratio approaching 100. This clean primary channel is a key feature of GAPS and is crucial for a rare event search. Additionally, the antiproton spectrum will be extended with high statistics measurements to cover the $0.07 \leq E \leq 0.25 $ GeV domain. For $E>0.2$ GeV GAPS data will be complementary to existing experiments, while $E<0.2$ GeV explores a new regime. The first flight is scheduled for late 2020 in Antarctica. These proceedings will describe the astrophysical processes and backgrounds relevant to the dark matter search, a brief discussion of detector operation, and construction progress made to date....
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Meeting Abstracts of the Physical Society of Japan, 73 136-136, 2018 Peer-reviewed
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ADVANCES IN SPACE RESEARCH, 60(4) 806-814, Aug, 2017 Peer-reviewed
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Journal of Astronomical Instrumentation, 6 1740005, 2017 Peer-reviewed
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Proceedings of Science, 2017
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Proceedings of Science, 2017
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Proceedings of Science, 2017 Peer-reviewed
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Advances in Space Research, 60(4) 806-814, Aug, 2017 Peer-reviewed
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Astrophysical Journal, 822(2), May, 2016 Peer-reviewed
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Journal of Low Temperature Physics, 184(3-4) 824-831, Aug, 2016 Peer-reviewed
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Proceedings of Science, 30-, 2015
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Proceedings of Science, 30-, 2015
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Proceedings of SPIE - The International Society for Optical Engineering, 9143, 2014 Peer-reviewed
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Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 735 24-38, Jan, 2014 Peer-reviewed
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Journal of Low Temperature Physics, 176(5-6) 733-740, Sep, 2014 Peer-reviewed
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Astroparticle Physics, 54 93-109, Feb, 2014 Peer-reviewed
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Advances in Space Research, 53(10) 1426-1431, May, 2014 Peer-reviewed
Misc.
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大気球シンポジウム: 2022年度 = Balloon Symposium: 2022, Nov, 2022大気球シンポジウム 2022年度（2022年11月7-8日. ハイブリッド開催（JAXA相模原キャンパス& オンライン)) Balloon Symposium 2022 (November 7-8, 2022. Hybrid(in-person & online) Conference (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan 著者人数: 26名 資料番号: SA6000177012 レポート番号: isas22-sbs-012
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宇宙航空研究開発機構宇宙科学研究所大気球シンポジウム (2021年度), isas21-sbs-032, Nov 2, 2021
Books and Other Publications
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"Neutrino Oscillation and their Origin", eds. Y.Suzuki, M.Nakahata, M.Miura and K.Kaneyuki, World Scientific., 2001
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Neutrino Oscillation and their Origin", eds. Y.Suzuki, M.Nakahata, M.Miura and K.Kaneyuki, World Scientific., 2001
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Proc. of 21st Intl. Symposium Space Technology and Science, 1998
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Proc. of 21st Intl. Symposium Space Technology and Science, 1998
Presentations
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SPACETIDE 2025 Side Event “The Force of Collaboration”, Jul, 2025
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45th COSPAR Scientific Assembly, Jul, 2024
Teaching Experience
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Business Internship (Osaka University of Economics)
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最新物理講義 (青山学院大学理学部)
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宇宙工学概論 (総合研究大学院大学物理科学研究科宇宙科学専攻)
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宇宙システム工学特論I (総合研究大学院大学物理科学研究科宇宙科学専攻)
Professional Memberships
4Research Projects
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2014 - Mar, 2017
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Grant-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2010 - Mar, 2014
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Grant-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Jul, 2009 - Mar, 2014
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 2006 - 2009
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 2001 - 2005
