Shunsaku Nagasawa's Website

Papers (Peer-reviewed)

1. S.Nagasawa, A.Pantazides, K.Cooper, R.Shimizu, S.Perez-Piel, T.Minami, Y.Zhang, H.Kanniainen,
   S.Watanabe, T.Takahashi, N.Narukage, J.C.Buitrago Casas, L.Glesener
   "SpaceWire-based Data Acquisition Network for the Solar Flare Sounding Rocket Experiment FOXSI-4 and FOXSI-5"
   Journal of Astronomical Telescopes, Instruments, and Systems, Vol.12, 014004, 2026
   DOI: https://doi.org/10.1117/1.JATIS.12.1.014004
   arXiv: https://doi.org/10.48550/arXiv.2601.02788
   
2. S.Nagasawa, T.Minami, S.Watanabe, T.Takahashi
   "Imaging and spectral performance of a wide-gap CdTe double-sided strip detector"
   Nuclear Instruments and Methods in Physics Research Section A, 1075, 170362, 2025
   DOI: https://doi.org/10.1016/j.nima.2025.170362
   arXiv: https://doi.org/10.48550/arXiv.2502.15899
   
3. S.Nagasawa, T.Minami, S.Watanabe, T.Takahashi
   "Wide-gap CdTe Strip Detectors for High-Resolution Imaging in Hard X-rays"
   Nuclear Instruments and Methods in Physics Research Section A, 1050, 168175, 2023
   DOI: https://doi.org/10.1016/j.nima.2023.168175
   arXiv: http://arxiv.org/abs/2302.14544
   
4. S.Nagasawa, T.Kawate, N.Narukage, T.Takahashi, Amir Caspi, Tom Woods
   "Study of Time Evolution of Thermal and Nonthermal Emission from an M-class Solar Flare"
   The Astrophysical Journal, Volume 933, Number 2, 2022
   DOI: https://iopscience.iop.org/article/10.3847/1538-4357/ac7532
   arXiv: https://doi.org/10.48550/arXiv.2205.14369
   
5. K.Furukawa, S.Nagasawa*, L.Glesener, M.Katsuragawa, S.Takeda, S.Watanabe, T.Takahashi
   "Imaging and Spectral Performance of a 60 μm Pitch CdTe Double-Sided Strip Detector"
   Nuclear Instruments and Methods in Physics Research Section A, 978, 164378, 2020
   DOI: https://doi.org/10.1016/j.nima.2020.164378
   arXiv: https://arxiv.org/abs/2006.06174
   
6. H.Gulick, H.Yoneda, T.Takahashi, C.Chen, K.Nakazawa, S.Nagasawa, M.Ando, K.Okuma et al.
   "A study of afterglow signatures in NaI and CsI scintillator modules for the background and transient observer instrument on COSI"
   Nuclear Instruments and Methods in Physics Research Section B, Volume 561, 2025
   DOI: https://doi.org/10.1016/j.nimb.2025.165631
   arXiv: https://doi.org/10.48550/arXiv.2501.16434
   
7. N.Itoh, H.Allaire, T.Ikeda, S.Nagasawa, S.Okada, T.Takahashi et al.
   "The energy dependence of cluster size and its physical processes in the proton measurement with TimePix3 silicon detector"
   Nuclear Instruments and Methods in Physics Research Section A, Volume 1073, 2025
   DOI: https://doi.org/10.1016/j.nima.2025.170244
   arXiv: https://doi.org/10.48550/arXiv.2501.10964
   
8. T.Minami, M.Katsuragawa, S.Nagasawa, S.Takeda, S.Watanabe, Y.Tsuzuki, T.Takahashi
   "2-mm-thick large-area CdTe double-sided strip detectors for high-resolution spectroscopic imaging of X-ray and gamma-ray with depth-of-interaction sensing"
   Nuclear Instruments and Methods in Physics Research Section A, Volume 1059, 2024
   DOI: https://doi.org/10.1016/j.nima.2023.169024
   arXiv: https://arxiv.org/abs/2312.07915
   
9. K.Ninomiya, T. Osawa, K.Terada, T.Wada, S.Nagasawa, I.Chiu, et al.
   "Quantification of bulk elemental composition for C-type asteroid Ryugu samples with nondestructive elemental analysis using muon beam"
   Meteoritics & Planetary Science, 2024
   DOI: https://doi.org/10.1111/maps.14135
   
10. T.Osawa, S.Nagasawa, K.Ninomiya, T.Takahashi, T.Nakamura, T.Wada et al.
    "Development of non-destructive elemental analysis system for Hayabusa2 samples using muonic X-rays"
    ACS Earth and Space Chemistry, 7(4), 699-711, 2023
    DOI: https://doi.org/10.1021/acsearthspacechem.2c00303
    
11. T.Nakamura, M.Matsumoto, K.Amano, Y.Enokido et al. (including S.Nagasawa)
    "Formation and evolution of carbonaceous asteroid Ryugu: Direct evidence from returned samples"
    Science, 2022
    DOI: https://doi.org/10.1126/science.abn8671
    Press Release: https://www.ipmu.jp/ja/20220923-Ryugu
    
12. I.Chiu, S.Takeda, M.Kajino, A.Shinohara, M.Katsuragawa, S.Nagasawa, R.Tomaru,
    G.Yabu, T.Takahashi, S.Watanabe, S.Takeshita, Y.Miyake, K.Ninomiya
    "Non-destructive 3D imaging method using muonic X-rays and a CdTe double-sided strip detector"
    Scientific Reports volume 12, 2022
    DOI: https://doi.org/10.1038/s41598-022-09137-5
    Press Release: https://www.ipmu.jp/ja/20220426-Muon
    

Proceedings

1. S.Nagasawa, T.Minami, T.Takahashi, S.Watanabe
   "First-principles response simulation of wide-gap CdTe-DSDs for the FOXSI solar sounding rocket experiment"
   Proc. SPIE 13625, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIV, 2025
   DOI: https://doi.org/10.1117/12.3064088
   arXiv: https://arxiv.org/abs/2509.00738
   
2. S.Nagasawa, T.Takahashi, K.Nakazawa, H.Gulick, C.Chen, H.Yoneda, K.Okuma, M.Dexter, J.Forgione, N.Gulati, et al.
   "Signal processing and data acquisition system for the BTO detectors onboard COSI"
   Proc. SPIE 13625, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIV, 2025
   DOI: https://doi.org/10.1117/12.3063967
   arXiv: https://arxiv.org/abs/2509.00725
   
3. A.Tosolini, S.Perez-Piel, J.C. Buitrago-Casas, J.C. Martínez Oliveros, A.Tremsin, K.Ampuku, S.Bongiorno
   S.Christe, K.Cooper, L.Glesener, N.Godbole et al. (including S.Nagasawa)
   "Initial report of Timepix3 detector performance on the FOXSI-5 sounding rocket payload"
   Proc. SPIE 14157, X-Ray, Optical, and Infrared Detectors for Astronomy XII, 2026
   DOI: https://doi.org/10.1117/12.3102574
4. R.Shimizu, N.Narukage, T.Sakao, Y.Sato, S.Kashima, T.Takahashi, S.Nagasawa,
   T.Minami, T.Iwata, L.Glesener, R.Suzaki
   "Evaluation of a CMOS sensor for solar flare soft x-ray imaging spectroscopy onboard the sounding rocket experiment FOXSI-4"
   Proc. SPIE 13103, X-Ray, Optical, and Infrared Detectors for Astronomy X, 2024
   DOI: https://doi.org/10.1117/12.3017009
5. H.Gulick, E.Neights, S.A.Nussirat, C.Chen, K.Ching, C.Dove, A.Joens, C.Kierans, H.Liu, I.Martinez, T.Mician, S.Nagasawa et al.
   "Across the soft gamma-ray regime: utilizing simultaneous detections in the Compton Spectrometer and Imager (COSI) and
   the Background and Transient Observer (BTO) to understand astrophysical transients"
   Proc. SPIE 13093, Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray, 2024
   DOI: https://doi.org/10.1117/12.3020606
6. T.Minami, S.Nagasawa, Y.Zhang, K.Cooper, A.Pantazides, L.Glesener, H.Kanniainen,
   S.Watanabe, N.Narukage, T.Takahashi
   "Hard X-ray focal plane detectors onboard the FOXSI-4 sounding rocket for solar flare observation"
   Proc. SPIE 13093, Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray, 2024
   DOI: https://doi.org/10.1117/12.3018742
7. J.Duncan, P.S.Athiray, S.Musset, J.Vievering, S.Nagasawa, JC.Buitrago-Casas, L.Glesener,
   T.Takahashi, S.Watanabe, Y.Zhang, S.Christe, A.MacDowell, S.Krucker
   "Modeling Effects of Charge Sharing on the Response of the FOXSI Sounding Rockets"
   Proc. SPIE 12191, X-Ray, Optical, and Infrared Detectors for Astronomy X, 2022
   DOI: https://doi.org/10.1117/12.2629443

Misc

1. S.Nagasawa
   "JSPS Fellow in America: Shunsaku Nagasawa"
   JSPS San Francisco Office Newsletter Volume 61, Invited article, 2025, (URL Link)
   
2. S.Nagasawa, T.Kawate, N.Narukage, T.Takahashi, A.Caspi
   "Utilizing CubeSat Observation Data: Investigating Solar Flare Particle Acceleration Mechanisms through MinXSS Solar Soft X-ray Spectroscopic Observations"
   The Astronomical Herald EUREKA (天文月報), 2024, (URL Link)
   
3. S.Nagasawa
   "Thermal/Nonthermal with MinXSS and RHESSI"
   RHESSI Nuggets, Invited article, 2022, (URL Link)
   

Presentation

International Conferences（as a presenter only）

Invited Talks

1. S.Nagasawa, FOXSI team
   "Probing Particle Acceleration in Solar Flares with Hard X-ray Focusing Imaging Spectroscopy"
   MR2026: International Workshop on Magnetic Reconnection (Link)
   Daiwa Roynet Hotel Kagoshima Tenmonkan PREMIER, Kagoshima, Japan
   Jun. 2026, Invited talk
   

Contributed Talks, Posters

1. S.Nagasawa, D.Khangulyan, T.Takahashi
   "Two-Zone Fokker-Planck Approach for Modeling the Time Evolution of Non-thermal Emissions in Solar Flares"
   Hinode-19 and SOLAR-C Science Meeting (Link)
   Nagoya University, Nagoya, Japan
   Sep. 2026, Poster presentation
   
2. S.Nagasawa, FOXSI-4 and FOXSI-5 team
   "Direct Focusing X-ray Imaging Spectroscopy of Solar Flares with FOXSI-4 and FOXSI-5"
   Hinode-19 and SOLAR-C Science Meeting (Link)
   Nagoya University, Nagoya, Japan
   Sep. 2026, Contributed talk
   
3. S.Nagasawa, D.Khangulyan, T.Takahashi
   "Two-Zone Fokker-Planck Approach for Modeling the Time Evolution of Non-thermal Emissions in Solar Flares"
   Solar Physics High Energy Research (SPHERE) 4 Workshop (Link)
   International House, Berkeley, USA
   Aug. 2025, Contributed talk
   
4. S.Nagasawa, T.Takahashi, K.Nakazawa, H.Gulick, C.Chen, H.Yoneda, K.Okuma et al.
   "Signal Processing and Data Acquisition System for the BTO Detectors onboard COSI"
   2025 SPIE Optics + Photonics, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIV (Link)
   Convention Center Sails Pavilion, San Diego, USA
   Aug. 2025, Contributed talk
   
5. S.Nagasawa, T.Minami, S.Watanabe, T.Takahashi et al.
   "First-principles Response Simulation of Wide-gap CdTe-DSDs for the FOXSI Solar Sounding Rocket Experiment"
   2025 SPIE Optics + Photonics, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIV (Link)
   Convention Center Sails Pavilion, San Diego, USA
   Aug. 2025, Contributed talk
   
6. S.Nagasawa, T.Minami, S.Watanabe, T.Takahashi et al.
   "Toward Realizing the First Direct Focusing Imaging of Solar Flares in Hard X-rays with FOXSI-4:
   Wide-gap CdTe Double-sided Strip Detectors and SpaceWire-based Data Acquisition Systems"
   AGU24 Annual Meeting (Link)
   Walter E. Washington Convention Center, Washington, D.C., USA
   Dec. 2024, Poster presentation
   
7. S.Nagasawa, COSI-BTO team.
   "Background & Transient Observer: Digital Board & Software Design"
   COSIfest 2024 (Link)
   Space Sciences Laboratory, Berkeley, USA
   Oct. 2024, Contributed talk
   
8. S.Nagasawa, T.Minami, Y.Zhang, A.Pantazides et al.
   "First Direct Focusing Hard X-ray Imaging of M-Class Solar Flare from FOXSI-4 Sounding Rocket Experiment"
   HINODE-17/IRIS-15/SPHERE-3 Joint Science Conference (Link)
   Montana State University, USA
   July 2024, Poster presentation
   
9. S.Nagasawa, T.Minami, S.Watanabe, T.Takahashi et al.
   "Wide-gap CdTe Double-Sided Strip Detectors for High-Resolution Imaging Spectroscopy of Solar Flares in Hard X-rays for FOXSI-4"
   HINODE-17/IRIS-15/SPHERE-3 Joint Science Conference (Link)
   Montana State University, USA
   July 2024, Poster presentation
   
10. S.Nagasawa
    "Developing Innovative Hard X-ray Spectral Imager for Studies of Particle Acceleration in Solar Flare"
    International Symposium on Quantum Electronics 2024 (Link)
    The University of Tokyo, Japan
    February 2024, Poster presentation
    
11. S.Nagasawa, T.Minami, S.Watanabe, T.Takahashi
    "Wide-Gap CdTe Double-Sided Strip Detectors for High-Resolution Imaging Spectroscopy of Solar Flares in Hard X-rays"
    IEEE 2023 Symposium on Radiation Measurements and Applications (SORMA XIX) (Link)
    Mendelssohn Auditorium, University of Michigan, Ann Arbor, USA.
    May 2023, Contributed talk (Peer-reviewed)
    
12. S.Nagasawa, T.Minami, S.Watanabe, T.Takahashi
    "Wide-Gap CdTe Double-Sided Strip Detectors for High-Resolution Imaging Spectroscopy of Solar Flares in Hard X-rays"
    Interdisciplinary Science Conference in Okinawa (ISCO 2023) -Physics and Mathematics meet Medical Science- (Link)
    OIST Auditorium, OIST, Okinawa, Japan
    February 2023, Poster presentation
    
13. S.Nagasawa
    "Solar Flare: A Key to Understanding the Energetic Universe"
    FoPM International Symposium (Link)
    Ito Hall, The University of Tokyo, Japan
    February 2023, Contributed talk
    
14. S.Nagasawa, T.Minami, S.Watanabe, T.Takahashi
    "Imaging and Spectral Performance of Wide-gap CdTe Double-Sided Strip Detectors for FOXSI-4 Sounding Rocket Experiment"
    The 4th Workshop on Quantum Beam Imaging (QBI2022) (Link)
    Administrative Headquarters Building, RIKEN, Japan
    September 2022, Contributed talk
    
15. S.Nagasawa, K.Mine, P.Cox, T.Melia, T.Mizuno, M.Numazawa, T.Takahashi, V.Takhistov, G.White, H.Yoneda
    "Population Distribution of Smallest Jovian Trojan Asteroids from Gamma-ray Albedo"
    Fermi-LAT Collaboration Meeting 2022 Fall (Link)
    Online participation
    September 2022, Contributed talk
    
16. S.Nagasawa, T.Minami, S.Watanabe, T.Takahashi
    "Imaging and Spectral Performance of Wide-gap CdTe Double-Sided Strip Detectors"
    9th Conference on New Developments in Photodetection (NDIP20) (Link)
    Aube conference centre, Troyes/France
    July 2022, Contributed talk (Peer-reviewed)
    
17. S.Nagasawa, T.Minami, S.Watanabe, T.Takahashi
    "Wide-gap CdTe Strip Detectors for High-Resolution Imaging in Hard X-rays"
    2021 IEEE Nuclear Science Symposium and Medical Imaging Conference (IEEE NPSS) (Link)
    Online participation
    October 2021, Contributed talk (Peer-reviewed)
    
18. S.Nagasawa, K.Furukawa, L.Glesener, M.Katsuragawa, S.Takeda, S.Watanabe, T.Takahashi
    "Imaging and Spectral Performance of a 60 μm Pitch CdTe Double-Sided Strip Detector"
    12th International "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors (HSTD12) (Link)
    International Conference Center Hiroshima
    December 2020, Contributed talk (Peer-reviewed)
    
19. S.Nagasawa, T.Kawate, N.Narukage, T.Takahashi, Amir Caspi, Tom Woods
    "Study of Time Evolution of Thermal and Non-Thermal Emission from the M-Class Solar Flare"
    SolFER Spring 2021 Meeting (Link)
    Online participation
    May 2021, Contributed talk (Peer-reviewed)
    
20. S.Nagasawa, T.Kawate, N.Narukage, T.Takahashi, Amir Caspi, Tom Woods
    "Time Evolution of Thermal and Non-thermal Emission from M7.6 Class Flare Observed with MinXSS and RHESSI"
    RHESSI-20 Workshop: Preparing for the Next Decade in High-Energy Solar Physics Research (Link)
    Online participation
    July 2021, Contributed talk and discussion
    
21. S.Nagasawa
    "Imaging and spectral performance of a 60 μm pitch CdTe double-sided strip detector for the FOXSI sounding rocket experiment"
    The Cosmos at High Energies: Exploring Extreme Physics through Novel Instrumentation (Link)
    Kavli IPMU, The University of Tokyo
    October 2020, Poster presentation
    
    

Domestic conferences in Japan (as a presenter only)

1. 長澤俊作, 渡辺伸, 高橋忠幸, 廣瀬維士, 佐藤慶暉, 菅井春佳, 成影典之, 他FOXSI-4/ FOXSI-5 Team
   "日米共同・太陽フレアX線集光撮像分光観測ロケット実験FOXSI-5の打ち上げと初期解析成果"
   日本天文学会 2026年秋季年会, 岡山理科大学, 2026年9月
   
2. 長澤俊作, Hannah Gulick, 高橋忠幸, 中澤知洋, 米田浩基, 大熊佳吾, 他COSI/BTOチーム
   "MeVガンマ線観測衛星COSI 搭載 Background and Transient Observer の開発"
   日本物理学会 2026年春季年会, オンライン開催, 2026年3月
   
3. 長澤俊作, Dmitry Khangulyan, 高橋忠幸
   "太陽フレア非熱的X線放射の時間発展理解に向けたTwo-zone Fokker-Planckモデルの構築"
   日本天文学会 2026年春季年会, 京都産業大学+オンライン開催, 2026年3月
   
4. 長澤俊作, 高橋忠幸, 中澤知洋, 大熊佳吾, 米田浩基, 清水康行, 伊藤尚輝, 幸村孝由, 他COSI/BTOチーム
   "MeVガンマ線観測衛星COSI搭載BTO検出器の信号処理システムの開発II"
   日本天文学会 2025年秋季年会, 海峡メッセ下関+オンライン開催, 2025年9月
   
5. 長澤俊作, 南喬博, 渡辺伸, 高橋忠幸,Yixian Zhang, Kristopher Cooper, 他FOXSI-4 Team
   "日米共同・太陽フレアX線集光撮像分光観測ロケット実験FOXSI-4: 硬X線装置の較正状況と初期解析成果"
   日本天文学会2025年春季年会, 水戸市民会館, 2025年3月
   
6. 長澤俊作, FOXSI-4 Team
   "First Direct Focusing Hard X-ray Imaging of M-Class Solar Flare with FOXSI-4 Sounding Rocket Experiment"
   2024年度 太陽研究者連絡会シンポジウム, JAXA宇宙科学研究所+オンライン開催, 2025年2月
   
7. 長澤俊作, 高橋忠幸, 中澤知洋, Hannah Gulick, Claire Chen, 他COSI/BTOチーム
   "MeVガンマ線観測衛星COSI搭載BTO検出器の信号処理システムの開発"
   日本天文学会 2024年秋季年会, 関西学院大学+オンライン開催, 2024年9月
   
8. 長澤俊作
   "太陽フレア粒子加速研究のための革新的硬X線撮像分光検出器の開発"
   第23回高宇連研究会 (高宇連博士論文発表会・研究会), 京都大学+オンライン開催, 2023年3月
   
9. 長澤俊作, 南喬博, 高橋忠幸, 渡辺伸, Lindsay Glesener, Athanasios Pantazides, 他FOXSI-4チーム
   "太陽観測ロケット実験FOXSI-4: 物理計測用FPGAボードと通信規格SpaceWireを用いたデータ取得システムの構築"
   日本天文学会 2023年秋季年会, 名古屋大学, 2023年9月
   
10. 長澤俊作, 南喬博, 高橋忠幸, 渡辺伸, 新井翔大, 岩田季也, 小高裕和, 高嶋聡, 加島颯太, 佐藤慶暉, 清水里香, 成影典之
    "太陽観測ロケット実験FOXSI-4に向けたワイドギャップCdTeストリップ検出器の開発と性能評価III"
    日本天文学会 2023年春季年会, 立教大学, 2023年3月
    
11. 長澤俊作, 南喬博, 高橋忠幸, 渡辺伸, 他FOXSI-4チーム
    "太陽フレアX線集光撮像分光観測ロケット実験FOXSI-4: Wide-gap CdTe両面ストリップ検出器の開発"
    第23回宇宙科学シンポジウム, オンライン開催, ポスター講演, 2023年1月
    
12. 長澤俊作, 高橋忠幸, 渡辺伸, Lindsay Glesener, Athanasios Pantazides, 他FOXSI-4チーム
    "太陽フレアX線集光撮像分光観測ロケット実験FOXSI-4: SpaceWireを用いたデータ取得システムの構築とテストモジュールの開発"
    第23回宇宙科学シンポジウム, オンライン開催, ポスター講演, 2023年1月
    
13. 長澤俊作, 峰海里, Peter Cox, Tom Melia, 水野恒史, 沼澤正樹, 高橋忠幸, Volodymyr Takhistov, Graham White, 米田浩基
    "Fermi-LATによる木星トロヤ群からのガンマ線アルベド放射と小惑星サイズ分布への制限"
    日本天文学会 2022年秋季年会, 新潟大学, 2022年9月
    
14. 長澤俊作, 南喬博, 高橋忠幸, 渡辺伸, 市橋正裕, 岩田季也, 小高裕和, 高嶋聡, 谷本敦, 丹波翼, 渡邊泰平, 神谷好郎, 成影典之
    "太陽観測ロケット実験FOXSI-4に向けたワイドギャップCdTeストリップ検出器の開発と性能評価II"
    日本天文学会 2022年春季年会, オンライン開催, 2022年3月
    
15. 長澤俊作, 南喬博, 高橋忠幸, 渡辺伸
    "太陽観測ロケット実験FOXSI-4に向けたワイドギャップCdTeストリップ検出器の開発と性能評価"
    日本天文学会 2021年秋季年会, オンライン開催, 2021年9月
    
16. 長澤俊作
    "Exploring Magnetic Energy Release in Solar Flares from High-Resolution Observation with Photon-Counting X-ray Detectors"
    第20回高宇連研究会 (高宇連博士論文発表会・研究会), オンライン開催, 2021年3月
    
17. 長澤俊作, 高橋忠幸, 成影典之, 川手朋子, Amir Caspi, Tom Woods
    "超小型衛星を用いた太陽フレアからの熱的・非熱的放射の時間発展の研究Ⅲ"
    日本天文学会 2021年春季年会, オンライン開催, 2021年3月
    
18. 長澤俊作, 高橋忠幸, 成影典之, 川手朋子, Amir Caspi, Tom Woods
    "超小型衛星を用いた太陽フレアからの熱的・非熱的放射の時間発展の研究Ⅱ"
    日本天文学会 2020年秋季年会, オンライン開催, 2020年9月
    
19. 長澤俊作
    "超小型衛星で迫る太陽フレアからの熱的・非熱的放射の時間発展と粒子加速"
    第50回 天文・天体物理若手夏の学校, オンライン開催, 2020年8月
    
20. 長澤俊作, 高橋忠幸, 成影典之, 川手朋子, Amir Caspi, Tom Woods
    "超小型衛星を用いた太陽フレアからの熱的・非熱的放射の時間発展の研究"
    日本天文学会 2020年春季年会, オンライン開催, 2020年3月
    
21. 長澤俊作
    "Imaging and spectral performance of a 60 μm pitch CdTe double-sided strip detector for the FOXSI sounding rocket experiment"
    新学術領域「クラスター階層」「量子ビーム応用」合同検出器 ワークショップ, 東北大学, ポスター講演, 2019年9月
    
22. 長澤俊作
    "太陽観測ロケット実験 FOXSI-3 用両面ストリップ CdTe 検出器の性能評価"
    第49回 天文・天体物理若手夏の学校, ロワジールホテル豊橋, ポスター講演, 2019年8月
    
    

Other Seminars

1. S.Nagasawa
   "FOXSI: Probing Particle Acceleration in Solar Flares with Focusing X-ray Imaging Spectroscopy"
   Knowledge-Sharing Seminar, High Energy Astrophysics Laboratory, RIKEN, Jun. 2026
   
2. S.Nagasawa
   "Basics of Data Acquisition System: Analog Signal Processing"
   SSL Solar Learning Group, Space Sciences Laboratory, Berkeley, Jan. 2026
   
3. S.Nagasawa
   "Background and Transient Observer: Overview and Data Products"
   COSI GRB Science Group Meeting, Online participation, Invited, Dec. 2025
   
4. S.Nagasawa
   "First-principles Response Simulation of Wide-gap CdTe-DSDs II"
   SSL Solar Learning Group, Space Sciences Laboratory, Berkeley, Sep. 2025
   
5. S.Nagasawa
   "First-principles Response Simulation of Wide-gap CdTe-DSDs"
   SSL Solar Learning Group, Space Sciences Laboratory, Berkeley, Apr. 2025
   
6. S.Nagasawa
   "SpaceWire-based Data Acquisition Network for the Solar Flare Sounding Rocket Experiment FOXSI-4 and FOXSI-5"
   SuperHERO Meeting, Space Sciences Laboratory, Berkeley, Apr. 2025
   
7. 長澤俊作
   "FOXSI-4 硬X線カメラの較正状況、解析ソフトウェアの準備状況"
   2024年度 宇宙プラズマにおける粒子加速ワークショップ, Kavli IPMU, 2024年11月
   
8. 長澤俊作, FOXSI-4 and FOXSI-5 team
   "太陽観測ロケット実験 FOXSI-4/FOXSI-5"
   高エネルギー天体物理研究情報共有会, 東京大学, Invited, 2024年11月
   
9. S.Nagasawa
   "Wide-band X-ray spectral analysis with MinXSS and RHESSI"
   Solar Flare Science Seminar, Space Sciences Laboratory, Berkeley, Invited, Nov. 2024
   
10. 長澤俊作
    "太陽フレア粒子加速研究のための革新的硬X線撮像分光検出器の開発"
    2024年度CURIE生研究発表会, 東京大学＋オンライン開催, 2024年3月
    
11. 長澤俊作
    "太陽フレアにおけるX線分光観測解析 -非熱的放射の時間変動とTwo-zone Fokker-Planckモデル計算-"
    X線集光撮像分光観測で挑む太陽フレア高エネルギー現象の理解, 東京大学Kavli IPMU, 2023年2月
    
12. 長澤俊作
    "次世代X線太陽観測で迫る磁気エネルギー解放による粒子加速機構II"
    2023年度CURIE生研究発表会, オンライン開催, 2023年6月
    
13. Shunsaku Nagasawa
    “Wide-band X-ray spectral analysis with MinXSS and RHESSI”
    Space Physics Seminar, University of Minnesota, Invited, May 2023, (Link)
    
14. 長澤俊作
    “Study of Time Evolution of Thermal and Nonthermal Emission from an M-class Solar Flare”
    FOXSI太陽X線集光撮像分光観測データ解析研究会, 名古屋大学, 2023年3月
    
15. 長澤俊作
    “XSPECによる太陽X線スペクトル解析”
    FOXSI太陽X線集光撮像分光観測データ解析研究会, 名古屋大学, 2023年3月
    
16. 長澤俊作
    "次世代X線太陽観測で迫る磁気エネルギー解放による粒子加速機構"
    2022年度CURIE生研究発表会, Online participation, 2022年8月
    
17. Shunsaku Nagasawa
    "Constraints on the Gamma-ray Emission from the Jupiter Trojan Region with Fermi-LAT"
    Fermi-LAT Galactic Science and New Physics Group Meeting, Online participation, Apr. 2022
    
18. 長澤俊作
    "MinXSSとRHESSIを用いた広X線帯域スペクトル解析"
    PhoENiX科学検討会, Online participation, 2021年4月
    
19. 長澤俊作
    "太陽フレア観測で迫る磁気リコネクションに伴う粒子加速機構"
    4PMセミナー研究紹介, Online participation, 2021年3月
    
    

Academic Activities