Precision Measurement of Cosmic Ray Chemical Composition by High Resolution Imaging Direct Cherenkov Light

• Project/Area Number: 24654061
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: The University of Tokyo
• Principal Investigator: SASAKI MAKOTO 東京大学, 宇宙線研究所, 准教授 (40242094)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 宇宙線核種 / 宇宙線起源 / 銀河内宇宙線 / 宇宙線スペクトル / 超新星 / 宇宙線伝播 / 直接チェレンコフ光 / 宇宙線加速

Outline of Final Research Achievements

The measurement of "Direct Cherenkov" (DC) light, of which intensity is propotional to the charge Z of the primary cosmic ray particle, should be a clear identification of particle species with less ambiguities. In that case, clear discrimination between DC and air shower components is a key. We have developed a very precise imaging device with the angular resolution less than 1 arcmin (i.e. 0.015 deg) for this purpose. We installed it onto a light collector in the Ashra Observatory on Mauna Loa in Hawaii and purformed several investigation observations. The data analysis is on going.

Research Products

• [Journal Article] Search for PeV-EeV Tau Neutrinos and Optical Transients from Violent Objects with Ashra-1 (2014)
  • Author(s): M.Sasaki
  • Journal Title: Astroparticle, Particle, Space Physics and Detectors for Physics Applications - Proceedings of the 14th ICATPP Conference Volume: 1 Pages: 112-119
  • DOI: 10.1142/9789814603164_0018
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Ashra NTA: Towards Survey of Astronomical Tau Neutrino Sources (2014)
  • Author(s): Y. Aita, T. Aoki,Y.Asaoka, H.M Motz, M. Sasaki, C. Abiko, C. Kanokohata,S.Ogawa ,H. Shibuya, T. Takada, T. Kimura, J. G. learned, S. Matsuno, S. Kuze, P. Chang, *G.W-S. Hou,Y.B. Hsiung, J-G. Shu, K. Ueno, M. Wang, P. M. Binder,J. Goldman, N. Sugiyama, Y. Watanabe, C-C. Hsu (Ashra NTA Collaboration)
  • Journal Title: JPS Conference Proceedings Volume: 1 Pages: 3095-3098
  • DOI: 10.7566/jpscp.1.013095
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Trigger and readout system for the Ashra-1 detector (2014)
  • Author(s): Y. Aita, T. Aoki,Y.Asaoka, Y.Moromoto,H.M Motz, M. Sasaki, C. Abiko, C. Kanokohata, *S.Ogawa ,H. Shibuya, T. Takada, T. Kimura, J. G. learned, S. Matsuno, S. Kuze, P. M. Binder,J. Goldman, N. Sugiyama, Y. Watanabe (Ashra-1 Collaboration)
  • Journal Title: JPS Conference Proceedings Volume: 1 Pages: 3111-3114
  • DOI: 10.7566/jpscp.1.013111
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Search for PeV-EeV Tau Neutrinos and Optical Transients from Violent Objects with Ashra-1 (2014)
  • Author(s): M.Sasaki
  • Journal Title: Proceedings of 14th ICATPP Conference on Astroparticle,Particle,Space Physics and Detectors for Physics Applications(Villa Olmo,Como 23-27 ) Volume: 印刷中
  • Peer Reviewed
• [Journal Article] Ashra NTA: Towards Survey of Astronomical Tau Neutrino Sources (2014)
  • Author(s): Y. Aita, T. Aoki,Y.Asaoka, H.M Motz, M. Sasaki, C. Abiko, C. Kanokohata,S.Ogawa ,H. Shibuya, T. Takada, T. Kimura, J. G. learned, S. Matsuno, S. Kuze, P. Chang, *G.W-S. Hou,Y.B. Hsiung, J-G. Shu, K. Ueno, M. Wang, P. M. Binder,J. Goldman, N. Sugiyama, Y. Watanabe, C-C. Hsu (Ashra NTA Collaboration)
  • Journal Title: Proceedings of the 12th Asia Pacific Physics Conference of AAPPS ASEPS3 The third Asia-Europe Physics Summit Volume: 1 Pages: 0130951-0130954
  • Peer Reviewed
• [Journal Article] Trigger and readout system for the Ashra-1 detector (2014)
  • Author(s): Y. Aita, T. Aoki,Y.Asaoka, Y.Moromoto,H.M Motz, M. Sasaki, C. Abiko, C. Kanokohata, *S.Ogawa ,H. Shibuya, T. Takada, T. Kimura, J. G. learned, S. Matsuno, S. Kuze, P. M. Binder,J. Goldman, N. Sugiyama, Y. Watanabe (Ashra-1 Collaboration)
  • Journal Title: Proceedings of the 12th Asia Pacific Physics Conference of AAPPS ASEPS3 The third Asia-Europe Physics Summit Volume: 1 Pages: 0131111-0131114
  • Peer Reviewed
• [Journal Article] Search for PeV-EeV Tau Neutrinos and Optical Transients from Violent Objects with Ashra-1 (2014)
  • Author(s): Y. Aita, T. Aoki,Y.Asaoka, H.M Motz,*M. Sasaki, C. Abiko, C. Kanokohata,S.Ogawa ,H. Shibuya, T. Takada, T. Kimura, J. G. learned, S. Matsuno, S. Kuze, P. M. Binder,J. Goldman, N. Sugiyama, Y. Watanabe (Ashra-1 Collaboration)
  • Journal Title: Proceedings of 33th Intl. Cosmic Ray Conf. (Rio) Volume: 印刷中
• [Journal Article] Ashra NTA: Towards Survey of Astronomical Tau Neutrino Sources (2014)
  • Author(s): Y. Aita, T. Aoki,Y.Asaoka, H.M Motz, M. Sasaki, C. Abiko, C. Kanokohata,S.Ogawa ,H. Shibuya, T. Takada, T. Kimura, J. G. learned, S. Matsuno, S. Kuze, P. Chang, *G.W-S. Hou,Y.B. Hsiung, J-G. Shu, K. Ueno, M. Wang, P. M. Binder,J. Goldman, N. Sugiyama, Y. Watanabe, C-C. Hsu (Ashra NTA Collaboration)
  • Journal Title: Proceedings of 33th Intl. Cosmic Ray Conf. (Rio) Volume: 印刷中
• [Journal Article] Cherenkov Tau Shower Earth-Skimming Method for PeV-EeV Tau Neutrino Observation with Ashra (2013)
  • Author(s): Yoichi Asaoka, Makoto Sasaki
  • Journal Title: Astroparticle Physics Volume: 41 Pages: 7-16
  • DOI: 10.1016/j.astropartphys.2012.10.001
  • Peer Reviewed
• [Journal Article] GRB起源PeV-EeVタウニュートリノ初探査 (2012)
  • Author(s): 浅岡陽一、佐々木真人
  • Journal Title: 日本物理学会 Volume: 67 Pages: 710-714
• [Presentation] Ashra-1 for NTA (2015)
  • Author(s): M.Sasaki
  • Organizer: International Symposium on Very High Energy Particle Astronomy - New Approach to PeV-EeV Universe -
  • Place of Presentation: National Taiwan University, Taipei, Taiwan
  • Year and Date: 2015-04-08 – 2015-04-09
  • Invited
• [Presentation] Ashra-1全体報告 (2015)
  • Author(s): 佐々木真人
  • Organizer: 日本物理学会 第70回年次大会(2015年)
  • Place of Presentation: 早稲田大学 早稲田キャンパス〒169-8050 東京都新宿区西早稲田1-6-1
  • Year and Date: 2015-03-21 – 2015-03-24
  • Invited
• [Presentation] Ashra-1全体報告 (2014)
  • Author(s): 佐々木真人
  • Organizer: 日本物理学会 2014年秋季大会
  • Place of Presentation: 佐賀大学 【本庄キャンパス】（本部） 〒840-8502 佐賀市本庄1
  • Year and Date: 2014-09-18 – 2014-09-21
  • Invited
• [Presentation] Ashra-1全体発表 (2014)
  • Author(s): 佐々木真人
  • Organizer: 日本物理学会2013年年次大会
  • Place of Presentation: 東海大学 湘南キャンパス 〒259-1292 神奈川県平塚市北金目四丁目１番１号
• [Presentation] Search for PeV-EeV Tau Neutrinos and Optical Transients from Violent Objects with Ashra-1 (2013)
  • Author(s): M.Sasaki
  • Organizer: 14th ICATPP Conference on Astroparticle,Particle,Space Physics and Detectors for Physics Applications
  • Place of Presentation: Villa Olmo,Como,Italy
• [Presentation] Ashra NTA: Towards Survey of Astronomical Tau Neutrino Sources (2013)
  • Author(s): Y. Aita, T. Aoki,Y.Asaoka, H.M Motz, M. Sasaki, C. Abiko, C. Kanokohata,S.Ogawa ,H. Shibuya, T. Takada, T. Kimura, J. G. learned, S. Matsuno, S. Kuze, P. Chang, *G.W-S. Hou,Y.B. Hsiung, J-G. Shu, K. Ueno, M. Wang, P. M. Binder,J. Goldman, N. Sugiyama, Y. Watanabe, C-C. Hsu (Ashra NTA Collaboration)
  • Organizer: The 12th Asia Pacific Physics Conference of AAPPS ASEPS3 The third Asia-Europe Physics Summit
  • Place of Presentation: International Conference Halls, Makuhari Messe Chiba, Japan
• [Presentation] Trigger and readout system for the Ashra-1 detector (2013)
  • Author(s): Y. Aita, T. Aoki,Y.Asaoka, Y.Moromoto,H.M Motz, M. Sasaki, C. Abiko, C. Kanokohata, *S.Ogawa ,H. Shibuya, T. Takada, T. Kimura, J. G. learned, S. Matsuno, S. Kuze, P. M. Binder,J. Goldman, N. Sugiyama, Y. Watanabe (Ashra-1 Collaboration)
  • Organizer: The 12th Asia Pacific Physics Conference of AAPPS ASEPS3 The third Asia-Europe Physics Summit
  • Place of Presentation: International Conference Halls, Makuhari Messe Chiba, Japan
• [Presentation] Search for PeV-EeV Tau Neutrinos and Optical Transients from Violent Objects with Ashra-1 (2013)
  • Author(s): Y. Aita, T. Aoki,Y.Asaoka, H.M Motz,*M. Sasaki, C. Abiko, C. Kanokohata,S.Ogawa ,H. Shibuya, T. Takada, T. Kimura, J. G. learned, S. Matsuno, S. Kuze, P. M. Binder,J. Goldman, N. Sugiyama, Y. Watanabe (Ashra-1 Collaboration)
  • Organizer: 33th Intl. Cosmic Ray Conf.
  • Place of Presentation: Centro Brasileiro de Pesquisas Fisicas(CBPF)Rua Xavier Sigaud 150,Rio de Janeiro CEP 22290-180,RJ,Brazi
• [Presentation] Ashra NTA: Towards Survey of Astronomical Tau Neutrino Sources (2013)
  • Author(s): Y. Aita, T. Aoki,Y.Asaoka, H.M Motz, M. Sasaki, C. Abiko, C. Kanokohata,S.Ogawa ,H. Shibuya, T. Takada, T. Kimura, J. G. learned, S. Matsuno, S. Kuze, P. Chang, *G.W-S. Hou,Y.B. Hsiung, J-G. Shu, K. Ueno, M. Wang, P. M. Binder,J. Goldman, N. Sugiyama, Y. Watanabe, C-C. Hsu (Ashra NTA Collaboration)
  • Organizer: 33th Intl. Cosmic Ray Conf.
  • Place of Presentation: Centro Brasileiro de Pesquisas Fisicas(CBPF)Rua Xavier Sigaud 150,Rio de Janeiro CEP 22290-180,RJ,Brazi
• [Presentation] Ashra-1全体報告 (2013)
  • Author(s): 佐々木真人
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 高知大学、 朝倉キャンパス、 高知市曙町二丁目5番1号
• [Presentation] Ashra全体報告 (2013)
  • Author(s): 佐々木真人
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学
• [Presentation] Ashra全体報告 (2012)
  • Author(s): 佐々木真人
  • Organizer: 日本物理学会第68回秋季大会
  • Place of Presentation: 京都産業大学
• [Remarks] 東京大学宇宙線研究所
  • URL: http://www.icrr.u-tokyo.ac.jp/index.html
• [Remarks] Ashra
  • URL: http://www.icrr.u-tokyo.ac.jp/̃ashra/
• [Remarks] 佐々木研究室
  • URL: http://www.icrr.u-tokyo.ac.jp/̃sasakig/
• [Remarks] 佐々木真人ホームページ
  • URL: http://www.icrr.u-tokyo.ac.jp/̃sasakim/
• [Remarks] 東京大学宇宙線研究所
  • URL: http://www.icrr.u-tokyo.ac.jp/index.html
• [Remarks] Ashra
  • URL: http://www.icrr.u-tokyo.ac.jp/~ashra/
• [Remarks] 佐々木研究室
  • URL: http://www.icrr.u-tokyo.ac.jp/~sasakig/
• [Remarks] 佐々木真人ホームページ
  • URL: http://www.icrr.u-tokyo.ac.jp/~sasakim/
• [Remarks] 3D-RTIL
  • URL: http://www.icrr.u-tokyo.ac.jp/~a3drtil/
• [Remarks] 東京大学宇宙線研究所
  • URL: http://www.icrr.u-tokyo.ac.jp/
• [Remarks] Ashra
  • URL: http://www.icrr.u-tokyo.ac.jp/~ashra
• [Remarks] 佐々木研究室
  • URL: http://www.icrr.u-tokyo.ac.jp/~sasakig
• [Remarks] 佐々木真人ホームページ
  • URL: http://www.icrr.u-tokyo.ac.jp/~sasakim
• [Remarks] 3D-RTIL
  • URL: http://www.icrr.u-tokyo.ac.jp/~a3drtil
• [Patent(Industrial Property Rights)] 撮像光学系及び撮像装置 (2014)
  • Inventor(s): 佐々木真人
  • Industrial Property Rights Holder: 佐々木真人
  • Industrial Property Rights Type: 特許
  • Filing Date: 2014-03-28
  • Overseas