研究者業績
基本情報
- 所属
- 国立研究開発法人宇宙航空研究開発機構 宇宙科学研究所 准教授
- 学位
- 博士(理学)(東京大学)
- 研究者番号
- 10392820
- ORCID ID
https://orcid.org/0000-0002-8071-3398- J-GLOBAL ID
- 200901069192864044
- researchmap会員ID
- 1000315975
- 外部リンク
経歴
1-
2004年6月 - 現在
学歴
1-
- 2003年
論文
254-
Journal of Physics: Conference Series 1468(1) 012074-012074 2020年2月 査読有りAbstract The CALET (CALorimetric Electron Telescope) space experiment, which is currently conducting direct cosmic-ray observations onboard the International Space Station (ISS), is an all-calorimetric instrument optimized for cosmic-ray electron measurements with capability to measure hadrons and gamma-rays. Since the start of observation in October 2015, smooth and continuous operations have taken place. In this paper, we will give a brief summary of the CALET observations ranging from charged cosmic rays, gamma-rays, to space weather, while focusing on the energy spectra of electrons and protons.
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 947 162695-162695 2019年12月 査読有り
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2019 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) N-30-05 2019年10月28日
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2019 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) N-05-065 2019年10月28日 筆頭著者責任著者
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Journal of Instrumentation 14(10) P10009-P10009 2019年10月9日 査読有り
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36th Intl. Cosmic Ray Conf. (ICRC2019) 128 2019年6月25日
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36th Intl. Cosmic Ray Conf. (ICRC2019) 037 2019年6月25日
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32nd ISTS (International Symposium on Space Technology and Science) 2019-m-16 2019年6月21日
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Physical Review Letters 122(18) 181102 2019年5月10日 査読有り
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Journal of Physics: Conference Series 1181(1) 012003 2019年3月10日 査読有り
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Advances in Space Research 63(1) 779-793 2019年1月 査読有り
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CPAD Instrumentation Frontier Workshop 2018 128 2018年12月10日
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2018年12月The 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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2018 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) N-17-01 2018年11月13日We have developed large-area lithium-drifted silicon (Si(Li)) detectors to meet the unique requirements of the General Antiparticle Spectrometer (GAPS) experiment. GAPS is an Antarctic balloon-borne mission scheduled for the first flight in late 2020. The GAPS experiment aims to survey low-energy cosmic-ray antinuclei, particularly antideuterons, which are recognized as essentially background-free signals from dark matter annihilation or decay. The GAPS Si(Li) detector design is a thickness of 2.5 mm, diameter of 10 cm and 8 readout strips. The energy resolution of <4 keV (FWHM) for 20 to 100 keV X-rays at temperature of -35 to -45 C, far above the liquid nitrogen temperatures frequently used to achieve fine energy resolution, is required. We developed a high-quality Si crystal and Li-evaporation, diffusion and drift methods to form a uniform Li-drifted layer. Guard ring structure and optimal etching of the surface are confirmed to suppress the leakage current, which is a main source of noise. We found a thin un-drifted layer retained on the p-side effectively suppresses the leakage current. By these developments, we succeeded in developing the GAPS Si(Li) detector. As the ultimate GAPS instrument will require >1000 10-cm diameter Si(Li) detectors to achieve high sensitivity to rare antideuteron events, high-yield production is also a key factor for the success of the GAPS mission.
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 905 12-21 2018年10月 査読有り
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Astrophysical Journal, Supplement Series 238(1) 5 2018年9月 査読有り
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Astrophysical Journal 863(2) 160 2018年8月20日 査読有り
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Astroparticle Physics 100 29-37 2018年7月 査読有り
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Physical Review Letters 120(26) 261102 2018年6月25日 査読有り
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19th International Heat Pipe Conference and 13th International Heat Pipe Symposium (IHPC-IHPS) HP6_6 2018年6月13日
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13th Conference on the Intersections of Particle and Nuclear Physics (CIPANP2018) 2018年6月1日The 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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AIAA Aerospace Sciences Meeting, 2018 (210059) 2018年1月7日 査読有り
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Physical Review Letters 119(18) 181101 2017年11月1日 査読有り
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35th Intl. Cosmic Ray Conf. (ICRC2017) 210 2017年7月
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35th Intl. Cosmic Ray Conf. (ICRC2017) 174 2017年7月
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35th Intl. Cosmic Ray Conf. (ICRC2017) 914 2017年7月
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Journal of Astronomical Instrumentation 06(02) 1740006-1740006 2017年6月25日 査読有り
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Journal of Astronomical Instrumentation 6(2) 1740001 2017年6月1日 査読有り
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Journal of Astronomical Instrumentation 6(2) 1740005 2017年6月1日 査読有り責任著者
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Astroparticle Physics 91 1-10 2017年5月1日 査読有り
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JPS Conf. Proc. 18 011003 2017年 査読有り
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Astrophysical Journal Letters 829(1) L20 2016年9月20日 査読有り
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JOURNAL OF LOW TEMPERATURE PHYSICS 184(3-4) 824-831 2016年8月 査読有り
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Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave 9904 99040X 2016年7月29日 査読有り
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ASTROPHYSICAL JOURNAL 822(2) 65 2016年5月 査読有り
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PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS 618 1-37 2016年3月 査読有り
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TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN 14(30) Pi_17-Pi_26 2016年 査読有り<p>A cooling system using oscillating heat pipe (OHP) has been developed for a balloon-borne astrophysics project GAPS (General Anti-Particle Spectrometer). Taking advantages of OHP, such as high conductivity, low-power, and suitability for spread heat source, OHP is planned to be used to cool the GAPS core detectors. OHP is a novel technique and it has never been utilized in practical use neither for a spacecraft nor for a balloon-craft, regardless of its many advantages. In these several years, we have investigated OHP's suitability for GAPS step by step. At first, we have succeeded in developing a scaleddown OHP model with a three-dimensional routing, which can operate in a wide temperature range around between 230 K and 300 K. We also succeeded in the first OHP flight demonstration with a prototype GAPS balloon experiment. Subsequently, we developed actual-sized OHP models with various routings. Numerical simulation models have been developed in parallel to further optimize the OHP design by understanding the OHP performance both macroscopically and microscopically. The design of the OHP check valve has been improved as well. This paper discusses the latest status of the GAPS-OHP development.</p>
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Journal of Physics: Conference Series 632(1) 012023 2015年8月13日 査読有り
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EPJ Web of Conferences 95 2015年5月29日 査読有り
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Advances in Space Research 55(2) 753-760 2015年 査読有り
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INTERNATIONAL JOURNAL OF MICROGRAVITY SCIENCE AND APPLICATION 32(2) 320211 2015年 査読有り
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Proceedings of Science 30- 2015年
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Proceedings of Science 30- 2015年
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Proceedings of Science 30- 2015年
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日本航空宇宙学会論文集 63(6) 257-264 2015年 査読有りIn this paper is presented a microgravity experiment system utilizing a high altitude balloon. The feature is a double shell structure of a vehicle that is dropped off from the balloon and a microgravity experiment section that is attached to the inside of the vehicle with a liner slider. Control with cold gas jet thrusters of relative position of the experiment section to the vehicle and attitude of the vehicle maintains fine microgravity environment. The design strategy of the vehicle is explained, mainly referring to differences from the authors' previous design. The result of the flight experiment is also shown to evaluate the characteristics of the presented system.
MISC
283-
2025 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) NSS-19-04 (#1633) 2025年11月5日
講演・口頭発表等
165-
62nd International Winter Meeting on Nuclear Physics 2026年1月21日
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TAUP (Topics in Astroparticle and Underground Physics) 2025 2025年8月27日
共同研究・競争的資金等の研究課題
17-
日本学術振興会 科学研究費助成事業 基盤研究(A) 2022年4月 - 2027年3月
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JAXA宇宙科学研究所 小規模計画 2017年7月 - 2027年3月
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宇宙航空研究開発機構宇宙科学研究所 宇宙工学委員会戦略的開発研究費 2025年4月 - 2026年3月
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日本学術振興会 科学研究費助成事業 国際共同研究加速基金(国際共同研究強化(B)) 2022年10月 - 2026年3月
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三菱財団 自然科学研究助成 2019年10月 - 2022年9月
● 指導学生等の数
8-
年度2025年度(FY2025)修士課程学生数1技術習得生の数2その他1
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年度2024年度(FY2024)修士課程学生数2連携大学院制度による学生数1技術習得生の数3その他2
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年度2023年度(FY2023)博士課程学生数1修士課程学生数1技術習得生の数3その他2
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年度2022年度(FY2022)博士課程学生数1技術習得生の数3その他2
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年度2021年度(FY2021)博士課程学生数1修士課程学生数2連携大学院制度による学生数2技術習得生の数3
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年度2020年度(FY2020)博士課程学生数1修士課程学生数2連携大学院制度による学生数3技術習得生の数2
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年度2019年度(FY2019)博士課程学生数1修士課程学生数4連携大学院制度による学生数4技術習得生の数4
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年度2018年度(FY2018)博士課程学生数1修士課程学生数2連携大学院制度による学生数3受託指導学生数1技術習得生の数2
● 専任大学名
1-
専任大学名総合研究大学院大学(SOKENDAI)
● 所属する所内委員会
3-
所内委員会名大樹航空宇宙実験場連絡会
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所内委員会名観測ロケット専門委員会
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所内委員会名大気球専門委員会