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2018 Fiscal Year Annual Research Report

Research on the Acceleration and Propagation of Cosmic Rays by High-precision Direct Observation

Research Project

Project/Area Number 26220708
Research InstitutionWaseda University

Principal Investigator

鳥居 祥二  早稲田大学, 理工学術院, 教授 (90167536)

Co-Investigator(Kenkyū-buntansha) 森 正樹  立命館大学, 理工学部, 教授 (80210136)
Project Period (FY) 2014-05-30 – 2019-03-31
Keywords宇宙線 / 高エネルギー電子 / 宇宙線加速機構 / 銀河内伝播機構 / 暗物質黒 / 重力波 / カロリメータ / 国際宇宙ステーション
Outline of Annual Research Achievements

CALETは2015年10月から現時点まで約3.5年にわたって安定的かつ継続的な観測が順調に行われている。主要な観測モードである高エネルギー(>10GeV)トリガーによる総観測量は約10億イベントに達している。装置性能の長期変動を定期的に較正することにより、(1) 1GeV-4.8TeV領域の電子、(2) 10GeV-数100TeV領域の陽子・原子核、(3)1GeV-1TeV領域のガンマ線、の観測に成功している。早稲田大学(WCOC)での軌道上観測のモニター及び国内外の研究チームによるデータ解析により、以下の研究実績を挙げている。1)主要目的である高エネルギー電子(>10 GeV)観測では、直接観測としては世界最高エネルギー領域まで観測を達成して、論文発表 (PRL2018)を行なった。2)陽子・原子核に関しては、陽子のエネルギースペクトル(50GeV-10TeV)の観測により、数100GeV領域でのスペクトルの硬化を最高精度で観測し、論文(PRL2019)が受理されている。さらに入射粒子の電荷決定をZ=1-40において達成し、主要な一次核について100TeV近辺までエネルギースペクトル、200GeVまでのB/C比のエネルギー依存性、及び超重核のフラックスを国際会議(COSPAR2018等)や日本物理学会等にて発表している。3)ガンマ線観測では、観測性能の検証を含む銀河内拡散成分やVela, Crab, Gemingや変動天体(CTA102) を検出し論文発表(ApJS2018)を行い、さらに重力波発生天体におけるガンマ線検出の上限値の論文発表(ApJ2018)も行っている。そのほか、低エネルギー電子の観測による太陽地球磁気圏の研究やガンマ線バーストの観測が、他観測との連携により実施されており、所期の研究目的に達成するとともに、新たな領域へと研究が進展している。

Research Progress Status

平成30年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

平成30年度が最終年度であるため、記入しない。

  • Research Products

    (69 results)

All 2019 2018 Other

All Int'l Joint Research (2 results) Journal Article (11 results) (of which Int'l Joint Research: 11 results,  Peer Reviewed: 11 results,  Open Access: 9 results) Presentation (50 results) (of which Int'l Joint Research: 30 results,  Invited: 13 results) Remarks (5 results) Funded Workshop (1 results)

  • [Int'l Joint Research] NASA / Goddard Space Flight Center/Louisiana State University/Washington University at St. Louis(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      NASA / Goddard Space Flight Center/Louisiana State University/Washington University at St. Louis
    • # of Other Institutions
      2
  • [Int'l Joint Research] Pisa INFN/Florence University/INFN/IFAC / CNR(イタリア)

    • Country Name
      ITALY
    • Counterpart Institution
      Pisa INFN/Florence University/INFN/IFAC / CNR
    • # of Other Institutions
      5
  • [Journal Article] Direct Measurement of the Cosmic-Ray Proton Spectrum from 50 GeV to 10 TeV with the Calorimetric Electron Telescope on the International Space Station2019

    • Author(s)
      O,Adriani, Y.Asaoka, M.Mori, S.Torii et al. (CALET Collaboration)
    • Journal Title

      Physical Review Letters

      Volume: 122 Pages: 181102(8pp)

    • DOI

      10.1103/PhysRevLett.122.181102

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The CALorimetric Electron Telescope (CALET) on the International Space Station: Results from the First Two Years2019

    • Author(s)
      Y Asaoka et al. (CALET Collaboration)
    • Journal Title

      Journal of Physics: Conf. Series (26th Extended European Cosmic Ray Symposium)

      Volume: 1181 Pages: 012003(1-11)

    • DOI

      10.1088/1742-6596/1181/1/012003

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Measurements of Heavy Cosmic-Ray Nuclei Spectra with CALET on the ISS2019

    • Author(s)
      Y.Akaike et al. (CALET Collaboration)
    • Journal Title

      Journal of Physics: Conf. Series (26th Extended European Cosmic Ray Symposium)

      Volume: 1181 Pages: 012042(1-7)

    • DOI

      10.1088/1742-6596/1181/1/012042

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] An Interpretation of the Cosmic Ray Electron + Positron Spectrum from 10 GeV to 3 TeV Measured by CALET on the ISS2019

    • Author(s)
      Saptashwa Bhattacharyya, Holger Motz, Yoichi Asaoka, Shoji Torii
    • Journal Title

      International Journal of Modern Physics D

      Volume: 28 Pages: 1950035(1-24)

    • DOI

      10.1142/S0218271819500354

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The cosmic-ray electron spectrum measured with the CALorimetric Electron Telescope2019

    • Author(s)
      Lorenzo Pacini et al. (CALET Collaboration)
    • Journal Title

      Proceedings of Science (ICHEP2018)

      Volume: 印刷中 Pages: 1-4

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Characteristics and Performance of the CALorimetric Electron Telescope (CALET) Calorimeter for Gamma-Ray Observations2018

    • Author(s)
      N.Cannady, Y.Asaoka, F.Sato, M.Tanaka, S.Torii et al. (CALET Collaboration)
    • Journal Title

      The Astrophysical Journal Supplement Series

      Volume: 238:5 Pages: 1-16

    • DOI

      10.3847/1538-4365/aad6a3

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Search for GeV Gamma- Ray Counterparts of Gravitational Wave Events by CALET2018

    • Author(s)
      O,Adriani, Y.Asaoka, M.Mori, S.Torii et al. (CALET Collaboration)
    • Journal Title

      The Astrophysical Journal

      Volume: 863:160 Pages: 1-9

    • DOI

      10.3847/1538-4357/aad18f

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Extended Measurements of Cosmic-ray Electron and Positron Spectrum from 11 GeV to 4.8 TeV with the Calorimetric Electron Telescope on the International Space Station2018

    • Author(s)
      O,Adriani, Y.Asaoka, M.Mori, S.Torii et al. (CALET Collaboration)
    • Journal Title

      Physical Review Letters

      Volume: 120 Pages: 261102 (7pp)

    • DOI

      10.1103/PhysRevLett.120.261102

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] On-orbit Operations and Offline Data Processing of CALET onboard the ISS2018

    • Author(s)
      Y. Asaoka, S.Ozawa, S. Torii, M.Mori et al. (CALET Collaboration)
    • Journal Title

      Astroparticle Physics

      Volume: 100 Pages: 29-37

    • DOI

      10.1016/j.astropartphys.2018.02.010

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] CALET: Calorimetric Electron Telescope2018

    • Author(s)
      Pier S. Marrocchesi et al. (CALET Collaboration)
    • Journal Title

      Frascati Physics Series(Frontier Objects in Astrophysics and Particle Physics)

      Volume: 66 Pages: 144-153

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] CALETが開始した高エネルギー宇宙の新たな探求2018

    • Author(s)
      鳥居祥二,浅岡陽一,森正樹,吉田篤正
    • Journal Title

      日本物理学会誌(話題)

      Volume: 73 Pages: 388-392

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] The CALorimetric Electron Telescope (CALET) Status and Initial Results2019

    • Author(s)
      T Gregory Guzik
    • Organizer
      APS April Meeting 2019 (Denver, USA)
    • Int'l Joint Research / Invited
  • [Presentation] Measurements of Nuclei Fluxes in Cosmic-rays with CALET2019

    • Author(s)
      Yosui Akaike on behalf of CALT collaboration
    • Organizer
      APS April Meeting 2019 (Denver, USA)
    • Int'l Joint Research
  • [Presentation] Three Years of CALET Ultra Heavy Cosmic Ray Observations2019

    • Author(s)
      Brian Flint Rauch and Bob Binns for the CALET Collaboration
    • Organizer
      APS April Meeting 2019 (Denver, USA)
    • Int'l Joint Research
  • [Presentation] Observations of the Sun in GeV Gamma Rays by CALET on the ISS2019

    • Author(s)
      Nicholas Cannady for the CALET Collaboration
    • Organizer
      APS April Meeting 2019 (Denver, USA)
    • Int'l Joint Research
  • [Presentation] On-orbit operation and gamma-ray burst observations with the CALET Gamma-ray Burst Monitor2019

    • Author(s)
      Yuta Kawakubo for the CALET collaboration
    • Organizer
      APS April Meeting 2019 (Denver, USA)
    • Int'l Joint Research
  • [Presentation] CALETによる3年間の軌道上観測の最新成果報告2019

    • Author(s)
      鳥居祥二
    • Organizer
      日本物理学会第74回年次大会(九州大学)
  • [Presentation] CALETによる陽子スペクトル観測2019

    • Author(s)
      浅岡陽一
    • Organizer
      日本物理学会第74回年次大会(九州大学)
  • [Presentation] CALETによる原子核エネルギースペクトル及びB/C比の観測2019

    • Author(s)
      赤池陽水
    • Organizer
      日本物理学会第74回年次大会(九州大学)
  • [Presentation] CALETによる高エネルギーガンマ線の観測と解析2019

    • Author(s)
      森正樹
    • Organizer
      日本物理学会第74回年次大会(九州大学)
  • [Presentation] CALET ガンマ線バーストモニター (CGBM) によるガンマ線バースト観測2019

    • Author(s)
      坂本貴紀
    • Organizer
      日本物理学会第74回年次大会(九州大学)
  • [Presentation] CALETによる1-10GeV全電子の太陽変調観測2019

    • Author(s)
      三宅晶子
    • Organizer
      日本物理学会第74回年次大会(九州大学)
  • [Presentation] Possible Interpretations of Structures in the CALET Electron+Positron Spectrum as Dark Matter Signatures2019

    • Author(s)
      Holger Motz
    • Organizer
      日本物理学会第74回年次大会(九州大学)
  • [Presentation] 高エネルギー電子・ガンマ線 観測装置(CALET)2019

    • Author(s)
      鳥居祥二
    • Organizer
      宇宙科学シンポジウム(宇宙科学研究所) 宇宙科学研究所賞受賞講演
    • Invited
  • [Presentation] CALETによる11GeV-4.8TeVの全電子スペクトル観測 (ポスター)2019

    • Author(s)
      浅岡陽一
    • Organizer
      宇宙科学シンポジウム(宇宙科学研究所)
  • [Presentation] CALETによる宇宙線原子核の観測観測(ポスター)2019

    • Author(s)
      赤池陽水
    • Organizer
      宇宙科学シンポジウム(宇宙科学研究所)
  • [Presentation] Interpretation of the CALET Electron+Positron Spectrum concerning Dark Matter Signature (ポスター)2019

    • Author(s)
      Holger Motz
    • Organizer
      宇宙科学シンポジウム(宇宙科学研究所)
  • [Presentation] The Calorimetric ElectronTelescope (CALET) Experiment on the International Space Station2018

    • Author(s)
      Shoji Torii
    • Organizer
      The 4th International Conference on Science, Application and Technology of Xenon Radiation Detector (Tokyo)
    • Int'l Joint Research / Invited
  • [Presentation] The Calorimetric Electron Telescope (CALET) Experiment on the International Space Station2018

    • Author(s)
      Shoji Torii
    • Organizer
      APS/JPS Joint Symposium celebrating the 60th anniversary of Physical Review Letters
    • Int'l Joint Research / Invited
  • [Presentation] CALorimetric Electron Telescope (CALET) Collaboration on the International Space Station,2018

    • Author(s)
      Shoji Torii for the CALET Collaboration
    • Organizer
      JAXA/NASA Joint Workshop (LosAngels, USA)
    • Int'l Joint Research / Invited
  • [Presentation] The Calorimetric Electron Telescope (CALET) on the International Space Station: Latest results from the First Two-Years on Orbit2018

    • Author(s)
      Shoji Torii for the CALET Collaboration
    • Organizer
      AMS Days 2018 (La Palma, Spain)
    • Int'l Joint Research / Invited
  • [Presentation] Preliminary Results on the Measurement of the Proton Spectrum with CALET on the ISS2018

    • Author(s)
      Pier Simone Marrocchesi for the CALET Collaboration
    • Organizer
      COSPAR2018 (Pasadena, USA)
    • Int'l Joint Research / Invited
  • [Presentation] Measurement of Cosmic Spectrum from CALET on the ISS - Ray Electron and Positron2018

    • Author(s)
      Yoichi Asaoka for the CALET Collaboration
    • Organizer
      COSPAR2018 (Pasadena, USA)
    • Int'l Joint Research
  • [Presentation] Performance of the CALET calorimeter for GeV energy gamma-ray observations2018

    • Author(s)
      Nicholas Cannady for the CALET Collaboration
    • Organizer
      COSPAR2018 (Pasadena, USA)
    • Int'l Joint Research
  • [Presentation] Cosmic-Ray Electron Flux from 1GeV to 10 GeV with low-energy trigger in the CALET Experiment2018

    • Author(s)
      Shoko Miyake for the CALET Collaboration
    • Organizer
      COSPAR2018 (Pasadena, USA)
    • Int'l Joint Research
  • [Presentation] Measurements of cosmic-ray carbon and oxygen nuclei spectra with CALET2018

    • Author(s)
      Paolo Maestro for the CALET Collaboration
    • Organizer
      COSPAR2018 (Pasadena, USA)
    • Int'l Joint Research / Invited
  • [Presentation] Measurements of Heavy Cosmic-Ray Nuclei (Z>8) Spectra from CALET on the ISS2018

    • Author(s)
      Yosui Akaike for the CALET Collaboration
    • Organizer
      COSPAR2018 (Pasadena, USA)
    • Int'l Joint Research
  • [Presentation] Search for gamma-ray counterparts of gravitational wave events by CALET2018

    • Author(s)
      Masaki Mori for the CALET collaborattion
    • Organizer
      COSPAR2018 (Pasadena, USA)
    • Int'l Joint Research
  • [Presentation] Status of CALET Ultra Heavy Cosmic Ray Analysis2018

    • Author(s)
      Brian Rauch for the CALET collaboration
    • Organizer
      COSPAR2018 (Pasadena, USA)
    • Int'l Joint Research
  • [Presentation] CALET Gamma-ray Burst observations and search for Gravitational Wave counterparts2018

    • Author(s)
      Sergio Ricciarini for the CALET collaboration
    • Organizer
      COSPAR2018(Pasadena, USA)
    • Int'l Joint Research
  • [Presentation] The CALorimetric Electron Telescope (CALET) on the International Space Station2018

    • Author(s)
      Yoichi Asaoka for the CALET collaboration
    • Organizer
      26th E+CRS / 35th RCRC (Altai, Russia)
    • Int'l Joint Research / Invited
  • [Presentation] Measurements of Heavy Cosmic-Ray Nuclei Spectra with CALET on the ISS2018

    • Author(s)
      Yosui Akaike for the CALET Collaboration
    • Organizer
      26th E+CRS / 35th RCRC (Altai, Russia)
    • Int'l Joint Research
  • [Presentation] Cosmic-ray Electron and Positron Spectrum from CALET Observations on ISS2018

    • Author(s)
      Yoichi Asaoka for the CALET collaboration
    • Organizer
      Searching for the Sources of Galactic cosmic rays (Paris, France)
    • Int'l Joint Research / Invited
  • [Presentation] CALET: Calorimetric Electron Telescope2018

    • Author(s)
      Pier Simone Marrocchesi for the CALET Collaboration
    • Organizer
      Dark Side of the Universe 2018(Annecy, France)
    • Int'l Joint Research / Invited
  • [Presentation] The Calorimetric Electron Telescope (CALET) Latest - years on orbit on results from the first three the International Space Station2018

    • Author(s)
      Yoichi Asaoka for the CALET collaboration
    • Organizer
      TeV Particle Astrophysics 2018 (Berlin, Germany)
    • Int'l Joint Research
  • [Presentation] Constraints on Dark Matter Annihilation and Decay from CALET Data2018

    • Author(s)
      Holger Motz
    • Organizer
      TeV Particle Astrophysics 2018 (Berlin, Germany)
    • Int'l Joint Research
  • [Presentation] he CALorimetric Electron Telescope (CALET) on the International Space Station: Results from the First Two Years of Operation2018

    • Author(s)
      Yoichi Asaoka for the CALET collaboration
    • Organizer
      ISVHECRI2018 (Nagoya)
    • Int'l Joint Research / Invited
  • [Presentation] Recent Results from the CALorimetric Electron Telescope(CALET) on the International Space Station2018

    • Author(s)
      Yoichi Asaoka for the CALET collaboration
    • Organizer
      The 10th International workshop on Very High Energy Particle Astronomy
    • Int'l Joint Research / Invited
  • [Presentation] Measurement of Cosmic-Ray Nuclei with CALET2018

    • Author(s)
      Yosui Akaike for the CALET Collabora5on
    • Organizer
      APS April Meeting 2018 (Columbus, USA)
    • Int'l Joint Research
  • [Presentation] CALET Ultra Heavy Cosmic Ray Analysis Status2018

    • Author(s)
      Brian Flint Rauch for the CALET Collaboration
    • Organizer
      APS April Meeting 2018 (Columbus, USA)
    • Int'l Joint Research
  • [Presentation] CALETによる3年間の観測成果と今後の展望2018

    • Author(s)
      鳥居祥二
    • Organizer
      日本物理学会秋季大会(信州大大学)
  • [Presentation] CALETによる11GeV-4.8TeVの全電子スペクトル観測結果2018

    • Author(s)
      浅岡陽一
    • Organizer
      日本物理学会秋季大会(信州大大学)
  • [Presentation] CALETによる宇宙線重原子核成分の観測2018

    • Author(s)
      赤池陽水
    • Organizer
      日本物理学会秋季大会(信州大大学)
  • [Presentation] CALETで観測する低エネルギー電子による太陽変調の研究2018

    • Author(s)
      右田陽太郎
    • Organizer
      日本物理学会秋季大会(信州大大学)
  • [Presentation] CALETにおけるトランジェントガンマ線観測システムの開発2018

    • Author(s)
      吉川 康太
    • Organizer
      日本物理学会秋季大会(信州大大学)
  • [Presentation] CALETにおけるBDTを用いた電子陽子識別方法の最適化研究2018

    • Author(s)
      片桐靖博
    • Organizer
      日本物理学会秋季大会(信州大大学)
  • [Presentation] Updated Constraints on Dark Matter Annihilation and Decay from CALET Data2018

    • Author(s)
      Holger Motz
    • Organizer
      日本物理学会秋季大会(信州大大学)
  • [Presentation] CALET による2.5年間の観測成果2018

    • Author(s)
      鳥居祥二
    • Organizer
      素粒子物理学の進展2018
  • [Presentation] Study on the solar modulation of GeV-energy electrons observed with the CALET2018

    • Author(s)
      Yotaro Migita
    • Organizer
      The Ninth Symposium on Polar Science (NIPR, Tachikawa)
  • [Presentation] Measurements of 1 to 10 GeV Cosmic-Ray Electron Flux in the CALET Experiment over 3 Years2018

    • Author(s)
      Shoko Miyake
    • Organizer
      Recent progress in heliospheric physics by direct measurements of unexplored space plasmas (Nagoya U.)
    • Int'l Joint Research
  • [Presentation] Latest Results from the CALorimetric Electron Telescope (CALET) on the International Space Station2018

    • Author(s)
      Yoichi Asaoka
    • Organizer
      Recent progress in heliospheric physics by direct measurements of unexplored space plasmas (Nagoya U.)
    • Int'l Joint Research
  • [Remarks] CALET-カロリメータ型宇宙線望遠鏡

    • URL

      http://calet.jp

  • [Remarks] 早稲田大学理工学術院鳥居研究室

    • URL

      http://www.crlab.wise.sci.waseda.ac.jp

  • [Remarks] 国際宇宙ステーション搭載の宇宙線電子望遠鏡(CALET)による電子スペクトル測定

    • URL

      https://www.waseda.jp/top/news/59919

  • [Remarks] 2年間のデータ蓄積により観測領域を拡張。4.8テラ電子ボルトまでの高精度電子識別に成功

    • URL

      iss.jaxa.jp/kiboexp/news/180627_calet.html

  • [Remarks] 鳥居祥二教授が第5回(2018年度)宇宙科学研究所賞・特別賞を受賞

    • URL

      https://www.waseda.jp/fsci/wise/news/2019/01/17/2626/

  • [Funded Workshop] CALET Technical Interface Meeting2018

URL: 

Published: 2019-12-27  

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