Observation of proton and helium cosmic-ray primaries and the ratio of boron relative to carbon by CALET experiment

• Project/Area Number: 15K05095
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Hirosaki University
• Principal Investigator: ICHIMURA Masakatsu 弘前大学, 理工学研究科, 准教授 (20232415)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 高エネルギー宇宙線 / 原子核 / CALET

Outline of Final Research Achievements

The development of the analysis method and the data analysis have been performed for the purpose of the initial analysis of the cosmic ray nuclei which have been observed by the CALET detector onboard the International Space Station.
At first, the development and the improvement of the track reconstruction algorithm have been done as same as the alignment calibration of the scintillating fibers in the detector. These have successfully improved the accuracy of the track reconstruction.Then the analysis of the observed data has been done basing on the established charge determination and energy estimation procedures. The detection efficiencies have been calculated in parallel with simulation calculations.
The absolute fluxes of proton and helium, the ratio of boron relative to carbon are now under calculation basing of above results.

Research Products

• [Int'l Joint Research] Louisiana State University/Washington University in St. Louis/University of Denver(米国)
• [Int'l Joint Research] University of Siena/University of Padova/University of Pisa(Italy)
• [Int'l Joint Research] Louisiana State University/Washington University in St. Louis/University of Denver(米国)
• [Int'l Joint Research] University of Siena/University of Padova/University of Pisa(Italy)
• [Int'l Joint Research] Louisiana State University/Washington University in St. Louis/University of Denver(米国)
• [Int'l Joint Research] University of Siena/University of Padova/University of Pisa(Italy)
• [Journal Article] On-orbit Operations and Offline Data Processing of CALET onboard the ISS (2018)
  • Author(s): Y. Asaoka, M. Mori et al.
  • 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] Energy Spectrum of Cosmic-ray Electron and Positron from 10 GeV to 3 TeV Observed with the Calorimetric Electron Telescope on the International Space Station (2017)
  • Author(s): Adriani O., Akaike Y., Asano K., et al.
  • Journal Title: PHYSICAL REVIEW LETTERS Volume: 119 Issue: 18 Pages: 181101-181101
  • DOI: 10.1103/physrevlett.119.181101
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Energy calibration of CALET onboard the International Space Station (2017)
  • Author(s): Y.Asaoka, Y.Akaike, S.Torii, M.Mori, H.M.Motz, S.Ozawa, Y.Shimizu, T.Tamura, T.Terasawa et al.
  • Journal Title: Astroparticle Physics Volume: 91 Pages: 1-10
  • DOI: 10.1016/j.astropartphys.2017.03.002
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] CALET Upper Limits on X-Ray and Gamma-Ray Counterparts of GW151226 (2016)
  • Author(s): O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, M. G. Bagliesi, G. Bigongiari, W. R. Binns, S. Bonechi, M. Bongi, P. Brogi, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, V. Di Felice, K. Ebisawa, T. Sakamoto, H. Tomida, et al.
  • Journal Title: The Astrophysical Journal Volume: 829 Issue: 1 Pages: 20-24
  • DOI: 10.3847/2041-8205/829/1/l20
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] CALETによる2年間の定常運用成果報告 (2018)
  • Author(s): 鳥居祥二, 浅岡陽一, 小澤俊介, 笠原克昌, Motz Holger, 田村忠久, 清水雄輝, 日比野欣也, 奥野祥二, 吉田篤正, 坂本貴紀, 中平聡志, 寺澤敏夫, 山岡和貴, 浅野勝晃, 吉田健二, 片寄祐作, 森正樹, 市村雅一, 宗像一起, 加藤千尋, 塩見晶司, 柳田昭平, 三宅晶子, 片岡龍峰, 晴山慎, 赤池陽水, 他CALETチーム
  • Organizer: 日本物理学会
• [Presentation] CALETにおける原子核観測の軌道上性能 (2017)
  • Author(s): 小澤俊介, 赤池陽水, 浅岡陽一, 市村雅一, 笠原克昌, 小宮優馬, 多田真紀子, 鳥居祥二, 他CALETチーム
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪大学豊中キャンパス
  • Year and Date: 2017-03-17
• [Presentation] CALET UPPER LIMITS ON X-RAY AND GAMMA-RAY COUNTERPARTS OF GW 151226 (2016)
  • Author(s): O. Adriani, Y. Akaike, Y. Asaoka, W.R. Binns, M.L. Cherry, T.G. Guzik, M. Ichimura, J.F. Krizmanic, J.W. Mitchell, M. Mori, J. Nishimura, J.F. Ormes, S. Ozawa, T. Sakamoto, Y. Shimizu, T. Tamura, S. Torii, J.P. Wefel, A. Yoshida, K. Yoshida 他72名
  • Organizer: the 8th Huntsville GRB conference
  • Place of Presentation: The Westin Huntsville(USA)
  • Year and Date: 2016-10-24
• [Presentation] CALETの初期観測成果報告 (2016)
  • Author(s): 鳥居祥二, 浅岡陽一, 笠原克昌, 小澤俊介, Motz Holger, 田村忠久, 清水雄輝, 日比野欣也, 奥野祥二, 吉田篤正, 坂本貴紀, 高橋一郎, 中平聡志, 赤池陽水，山岡和貴, 寺澤敏夫, 浅野勝晃, 森正樹，吉田健二, 片寄祐作，市村雅一, 宗像一起, 加藤千尋, 塩見晶司, 柳田昭平, 三宅晶子, 片岡龍峰, 晴山慎, 他CALETチーム
  • Organizer: 日本物理学会
  • Place of Presentation: 宮崎大学木花キャンパス
  • Year and Date: 2016-09-21
• [Presentation] CALET検出器における入射粒子の飛跡再構成 (2016)
  • Author(s): 市村雅一，前川芽以，松本尚樹，鳥居祥二，浅岡陽一，笠原克昌，小澤俊介，赤池陽水，清水雄輝，田村忠久，他CALETチーム
  • Organizer: 日本物理学会
  • Place of Presentation: 宮崎大学木花キャンパス
  • Year and Date: 2016-09-21
• [Presentation] CALET軌道上観測の初期運用報告 (2016)
  • Author(s): 鳥居祥二, 浅岡陽一, 笠原克昌, 小澤俊介, 赤池陽水, Motz Holger, 田村忠久, 清水雄輝, 日比野欣也, 奥野祥二, 吉田篤正, 坂本貴紀, 高橋一郎, 中平聡志, 山岡和貴, 寺澤敏夫, 浅野勝晃, 吉田健二, 片寄祐作, 森正樹, 市村雅一, 宗像一起, 加藤千尋, 塩見晶司, 柳田昭平, 三宅晶子, 片岡龍峰, 晴山慎, 他CALETチーム
  • Organizer: 日本物理学会
  • Place of Presentation: 東北学院大学泉キャンパス
  • Year and Date: 2016-03-19