Development of the new optical sensors for exploration of deep Universe with the next generation neutrino telescopes

• Project/Area Number: 16H02174
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Chiba University
• Principal Investigator: Ishihara Aya 千葉大学, 大学院理学研究院, 教授 (40568929)
• Project Period (FY): 2016-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥45,240,000 (Direct Cost: ¥34,800,000、Indirect Cost: ¥10,440,000); Fiscal Year 2020: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000); Fiscal Year 2019: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000); Fiscal Year 2018: ¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000); Fiscal Year 2017: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2016: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
• Keywords: ニュートリノ / 超高エネルギー宇宙線 / マルチメッセンジャー / ニュートリノ検出器 / 光検出器 / マルチメッセンジャー天文学 / 宇宙線 / 高エネルギー天体 / 最高エネルギー宇宙線

Outline of Final Research Achievements

Cosmic neutrinos bring us with more direct information from the high energy Universe. Furthermore, it allowed us to realize the multi-messenger observation with conventional telescopes using e.g., visible light and gamma rays. The IceCube detector measured distributions of the high energy cosmic neutrino fluxes for the first time. However, the low statistics of the high-energy neutrinos limit its capability. To overcome the situation, we have developed a new optical sensor module that can significantly enhance the efficiency of high-energy neutrino detection. We also have performed several searches for extremely-high energy cosmic neutrinos. These analyses have placed the world's best limit on neutrino flux at energies above 10 PeV placing important constraints on ultra-high energy cosmic ray origins. Moreover, observations of a flaring blazar in coincidence with IceCube real-time alert made the neutrino and multimessenger astronomy a reality.

Academic Significance and Societal Importance of the Research Achievements

ニュートリノは通常の望遠鏡では観測が難しい高エネルギー宇宙の情報をもたらす。しかし、その検出は難しいという困難もある。その困難な観測の精度向上を、検出器と解析手法の両面から行い、将来のニュートリノ望遠鏡への道筋をつけることに成功した。天体のマルチメッセンジャー観測は今後の発展が期待される新しい重要な分野へと成長しつつある。また、地上加速器では不可能な高エネルギー現象を解明するために宇宙からくる素粒子ニュートリノを使うという新たな可能性をも示すものであり宇宙天体観測に変革をもたらした。

Research Products

• [Int'l Joint Research] WIPAC, University of Wisconsin/Michigan State University(米国)
• [Int'l Joint Research] DESY/University of Munster(ドイツ)
• [Int'l Joint Research] Sungkyunkwan University(韓国)
• [Int'l Joint Research] University of Wisconsin at Madison/Michigan State University(米国)
• [Int'l Joint Research] DESY/University of Munster(ドイツ)
• [Int'l Joint Research] University of Wisconsin at Madison(米国)
• [Journal Article] Detection of a particle shower at the Glashow resonance with IceCube (2021)
  • Author(s): The IceCube Collaboration、Aartsen M. G. et al
  • Journal Title: Nature Volume: 591 Issue: 7849 Pages: 220-224
  • DOI: 10.1038/s41586-021-03256-1
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Follow-up of Astrophysical Transients in Real Time with the IceCube Neutrino Observatory (2021)
  • Author(s): IceCube Collaboration: C. Hill, A. Ishihara, K. Kin, L. Lu,Y. Makino,K. Mase, M. Meier, R. Nagai, S. Yoshida, et al.
  • Journal Title: The Astrophysical Journal Volume: 910 Issue: 1 Pages: 4-4
  • DOI: 10.3847/1538-4357/abe123
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Searches for neutrinos from cosmic-ray interactions in the Sun using seven years of IceCube data (2021)
  • Author(s): IceCube Collaboration: C. Hill, A. Ishihara, K. Kin, L. Lu,Y. Makino,K. Mase, M. Meier, R. Nagai, S. Yoshida, et al.
  • Journal Title: Journal of Cosmology and Astroparticle Physics Volume: 2021 Issue: 02 Pages: 025-025
  • DOI: 10.1088/1475-7516/2021/02/025
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Measurements of the time-dependent cosmic-ray Sun shadow with seven years of IceCube data: Comparison with the Solar cycle and magnetic field models (2021)
  • Author(s): IceCube Collaboration: C. Hill, A. Ishihara, K. Kin, L. Lu,Y. Makino,K. Mase, M. Meier, R. Nagai, S. Yoshida, et al.
  • Journal Title: Physical Review D Volume: 103 Issue: 4
  • DOI: 10.1103/physrevd.103.042005
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Characteristics of the Diffuse Astrophysical Electron and Tau Neutrino Flux with Six Years of IceCube High Energy Cascade Data (2020)
  • Author(s): Aartsen M.G. et al
  • Journal Title: Physical Review Letters Volume: 125 Issue: 12
  • DOI: 10.1103/physrevlett.125.121104
  • Peer Reviewed
• [Journal Article] Time-Integrated Neutrino Source Searches with 10 Years of IceCube Data (2020)
  • Author(s): A. Ishihara, 他 IceCube Collaboration
  • Journal Title: Physical Review Letters Volume: 124 Issue: 5 Pages: 051103-051103
  • DOI: 10.1103/physrevlett.124.051103
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Search for Sources of Astrophysical Neutrinos Using Seven Years of IceCube Cascade Events (2019)
  • Author(s): A. Ishihara, 他 IceCube Collaboration
  • Journal Title: The Astrophysical Journal Volume: 886 Issue: 1 Pages: 12-12
  • DOI: 10.3847/1538-4357/ab4ae2
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Detection of the Temporal Variation of the Sun's Cosmic Ray Shadow with the IceCube Detector (2019)
  • Author(s): A. Ishihara, 他 IceCube Collaboration
  • Journal Title: The Astrophysical Journal Volume: 872 Issue: 2 Pages: 133-133
  • DOI: 10.3847/1538-4357/aaffd1
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Efficient propagation of systematic uncertainties from calibration to analysis with the SnowStorm method in IceCube. (2019)
  • Author(s): C. Hill, A. Ishihara, K. Kin, L. Lu,Y. Makino,K. Mase, M. Meier, R. Nagai, S. Yoshida 他 IceCube Collaboration
  • Journal Title: Journal of Cosmology and Astroparticle Physics Volume: 2019 Issue: 10 Pages: 048-048
  • DOI: 10.1088/1475-7516/2019/10/048
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Neutrino emission from the direction of the blazar TXS 0506+056 prior to the IceCube-170922A alert (2018)
  • Author(s): S. Yoshida, A. Ishihara 他（ IceCube collaboration）
  • Journal Title: Science Volume: 361 Issue: 6398 Pages: 147-151
  • DOI: 10.1126/science.aat2890
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Differential limit on the extremely-high-energy cosmic neutrino flux in the presence of astrophysical background from nine years of IceCube data (2018)
  • Author(s): Aartsen M et al (IceCube Collaboration)
  • Journal Title: Physical Review D Volume: 98 Issue: 6 Pages: 062003-062003
  • DOI: 10.1103/physrevd.98.062003
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The IceCube realtime alert system (2017)
  • Author(s): M.G. Aartsen et al (IceCube Collaboration)
  • Journal Title: Astroparticle Physics Volume: 92 Pages: 30-41
  • DOI: 10.1016/j.astropartphys.2017.05.002
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Measurement of the multi-TeV neutrino interaction cross-section with IceCube using Earth absorption (2017)
  • Author(s): IceCube Collaboration: Aartsen M.G., Ishihara A, et al.
  • Journal Title: Nature Volume: 551 Issue: 7682 Pages: 596-600
  • DOI: 10.1038/nature24459
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Multi-messenger Observations of a Binary Neutron Star Merger (2017)
  • Author(s): Abbott B. P., Abbott, R., Abbott, T. D., Acernese, F., Ackley, K., Adams, C., Adams, T., Addesso, P., Adhikari, R. X., Adya, V. B., Affeldt, C., Afrough, M., Agarwal, B., Agathos, M., Agatsuma, K., Aggarwal, N., Aguiar, O. D., Aiello, L., Ain, A., Ajith, P. 他 Negoro, H. 含む 3656 名
  • Journal Title: The Astrophysical Journal Letters Volume: 848 Issue: 2 Pages: 1-59
  • DOI: 10.3847/2041-8213/aa91c9
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Constraints on Ultrahigh-Energy Cosmic-Ray Sources from a Search for Neutrinos above 10?PeV with IceCube (2016)
  • Author(s): M.G. Aartsen et al (IceCube Collaboration)
  • Journal Title: Physical Review Letters Volume: 117 Issue: 24 Pages: 241101-241101
  • DOI: 10.1103/physrevlett.117.241101
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] OBSERVATION AND CHARACTERIZATION OF A COSMIC MUON NEUTRINO FLUX FROM THE NORTHERN HEMISPHERE USING SIX YEARS OF ICECUBE DATA (2016)
  • Author(s): M.G. Aartsen et al (IceCube Collaboration)
  • Journal Title: The Astrophysical Journal Volume: 833 Issue: 1 Pages: 3-3
  • DOI: 10.3847/0004-637x/833/1/3
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] High-Energy Neutrino Follow-Up Search of Gravitational Wave Event GW150914 with ANTARES and IceCube (2016)
  • Author(s): ANTARES, IceCube, LIGO Scientific and Virgo Collaborations: S. Adrin-Martnez, A. Ishihara et al
  • Journal Title: Physical Review D Volume: 93 Issue: 12 Pages: 122010-122010
  • DOI: 10.1103/physrevd.93.122010
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] IceCube-Upgradeに向けた新型光検出器D-Eggの製造及び南極への発送に向けた最終試験 (2021)
  • Author(s): 金 賢一
  • Organizer: 日本物理学会 第76回年次春季大会(2021年)
• [Presentation] IceCube実験アップグレードの新型光検出器D-Eggに用いられるPMTとDAQ基板の大光量信号時の応答性評価 (2021)
  • Author(s): 森井 保次
  • Organizer: 日本物理学会 第76回年次春季大会(2021年)
• [Presentation] IceCube-Upgrade実験のための較正用LEDシステムの光度・角度分布の測定と南極氷河較正に向けたシミュレーションの開発 (2021)
  • Author(s): 武政 祐哉
  • Organizer: 日本物理学会 第76回年次春季大会(2021年)
• [Presentation] Recent updates on real-time alert system with IceCube (2020)
  • Author(s): 石原 安野
  • Organizer: Recent Topics in Time-Domain High-Energy Messenger Astrophysics
  • Invited
• [Presentation] 新型光検出器D-Eggの南極点氷河埋設に向けた耐性評価 (2020)
  • Author(s): 石原 安野
  • Organizer: 日本物理学会 第75回年次秋季大会
• [Presentation] 新型光検出器D-Egg内校正用LEDの光度・角度分布測定におけるシステム開発と測定結果 (2020)
  • Author(s): 武政 祐哉
  • Organizer: 日本物理学会 第75回年次秋季大会
• [Presentation] IceCube Gen2計画に向けた次世代光検出器「mEgg」の性能評価 (2020)
  • Author(s): 鈴木 万里子
  • Organizer: 日本物理学会 第75回年次秋季大会
• [Presentation] Droop correction database for D-Egg modules (2020)
  • Author(s): Stephany Vargas
  • Organizer: 日本物理学会 第75回年次秋季大会
• [Presentation] IceCube実験アップグレードに用いる新型光検出器D-EggのDAQ基板の単体評価 (2020)
  • Author(s): 森井 保次
  • Organizer: 日本物理学会 第75回年次秋季大会
• [Presentation] Recent progresses on the high energy neutrino astrophysics (2020)
  • Author(s): 石原 安野
  • Organizer: 第３３回 理論懇シンポジウム 「理論天文学・宇宙物理学のブレイクスルー」
• [Presentation] Neutrino Astrophysics: Experimental (2020)
  • Author(s): Aya Ishihara
  • Organizer: AAPPS-DACG Workshop on Astrophysics, Cosmology and Gravitation
  • Int'l Joint Research / Invited
• [Presentation] Constratins on UHECR sources with 9 years of the IceCube EHE data (2018)
  • Author(s): Aya Ishihara
  • Organizer: VLVnT - 2018 Very Large Volume Neutrino Telescopes
  • Int'l Joint Research / Invited
• [Presentation] Development of the front-end electronics for the new optical module “D-Egg” for IceCube-Gen2 (2018)
  • Author(s): Ryo Nagai
  • Organizer: 5th International Workshop on New Photon-Detectors
  • Int'l Joint Research
• [Presentation] D-Egg: A next-generation optical module for IceCube (2018)
  • Author(s): Yuya Makino
  • Organizer: VLVnT - 2018 Very Large Volume Neutrino Telescopes
  • Int'l Joint Research / Invited
• [Presentation] Recent results on astrophysics and particle physics from IceCube (2018)
  • Author(s): Aya Ishihara
  • Organizer: XLVIII International Symposium on Multiparticle Dynamics (ISMD 2018)
  • Int'l Joint Research / Invited
• [Presentation] アイスキューブ・ジェンツ―(IceCube-Gen2)で視る宇宙ニュートリノ (2018)
  • Author(s): Aya Ishihara
  • Organizer: "2019年 春季物理学会 シンポジウム 「ニュートリノで拓く素粒子と宇宙」 "
  • Invited
• [Presentation] Recent progresses on the multi-messenger astronomy with neutrinos and cosmogenic neutrino searches (2018)
  • Author(s): Aya Ishihara
  • Organizer: The 7th PACIFIC conference (PACIFIC 2018)
• [Presentation] The recent progress on the observation of ultra-high energy universe with neutrinos (2017)
  • Author(s): Aya Ishihara
  • Organizer: The second KIAA international Workshop on Astroparticle Physics, “KIAA-WAP II: Cosmic rays in a new era”
• [Presentation] Overview and performance of the D-Egg sensor for IceCube-Gen2 (2017)
  • Author(s): Aya Ishihara for the IceCube-Gen2 collaboration
  • Organizer: the 35th International Cosmic Ray Conference (ICRC 2017)
• [Presentation] Differential limit on an EHE neutrino flux component in the presence of astrophysical background from nine years of IceCube data (2017)
  • Author(s): Shigeru Yoshida and Aya Ishihara for the IceCube collaboration
  • Organizer: the 35th International Cosmic Ray Conference (ICRC 2017)
• [Presentation] High Energy Neutrino Astronomy: An experimental view (2016)
  • Author(s): Aya Ishihara
  • Organizer: International workshop on Astroparticle physics at Yachay
  • Int'l Joint Research / Invited
• [Presentation] Constraints on UHECR sources from IceCube (2016)
  • Author(s): Aya Ishihara
  • Organizer: 2016 International Conference on Ultra-High Energy Cosmic Rays (UHECR2016)
  • Int'l Joint Research / Invited
• [Remarks] 千葉大学ハドロン宇宙国際研究センター ニュートリノ天文学 研究成果
  • URL: http://www.icehap.chiba-u.jp/icecube/result.html
• [Remarks]