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Direct Observation of High Energy Cosmic Ray with Circumpolar Balloon.

Research Project

Project/Area Number 06302018
Research Category

Grant-in-Aid for Co-operative Research (A)

Allocation TypeSingle-year Grants
Research Field 素粒子・核・宇宙線
Research InstitutionInstitute for Cosmic Ray Research, University of Tokyo

Principal Investigator

OGATA Takeshi  ICRR.Univ.of Tokyo, Associate Prof., 宇宙線研究所, 助教授 (50107471)

Co-Investigator(Kenkyū-buntansha) IYONO Atsushi  Faculty of Engineering, Okayama Univ.of Science, Associate Prof., 工学部, 講師 (10211757)
FUKI Michiko  Faculty of Educ., Kochi Univ., Associ.Prof., 教育学部, 助教授 (10199177)
DAKE Shoji  Dept.of Phys., Kobe Univ., Assit.Prof., 理学部, 助手 (80030774)
YOKOMI Hiroyuki  Dept.of Economics, Tezukayama Univ.Prof., 経済学部, 教授 (60029460)
MIYAMURA Osamu  Dept.of Phys.Hiroshima Univ., Prof., 理学部, 教授 (80029511)
杉立 徹  広島大学, 理学部, 助教授 (80144806)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥5,000,000 (Direct Cost: ¥5,000,000)
Fiscal Year 1995: ¥5,000,000 (Direct Cost: ¥5,000,000)
KeywordsPrimary Cosmic Ray / Heavy Ion Interactior / 重イオン反応. / 一次宇宙線の組成 / 超高エネルギー核反応
Research Abstract

The elemental composition and the energy spectra of cosmic rays around the "knee" region have been central issues in the study of the acceleration mechanism and the origin of cosmic rays. In order to directly observe cosmic ray fluxes at energies approaching the knee, exposure factors of m^2-years are required. Detectors of large collecting area, weighing 1 ton or more, must be flown for hundreds of hours at altitudes exceeding 5 g/cm^2.
The JACEE (Japanese American Cooperative Emulsion Experiments) collaboration has successfully executed ten midlatitude balloon campaigns to measure the spectrum and composition of primary cosmic ray nuclei above 10^<12> eV/nucleon.
We now seek to extend our data into the knee region of the spectrum at 10^<15> eV.
To this end, a series of long duration (>200hour) balloon exposures is being in Antarctica. In the years concerned, JACEE has had two successful circum polar balloon flights (JACEE 13, and JACEE 14) in Antractica. Each flight provided 300 hours of exposure at approximately 5 g/cm^2 residual overburden, for an array of 6 emulsion chamber modules with overall area 100cm * 120cm.
Two this recent Antarctic exposures JACEE 13, and 14, are being analyzed now and will triple the existing data pool.

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] O.Miyamura et al.: "Search for Long Mean Free Path Nuclei with a Balloon Borne Emulsion Chamber." 24th Int.Cosmic Ray Conf.in Roma.1. 890-893 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] K.Asakimori et al.: "High Energy Gamma Rays above 3 TeV observed by Balloon Borne JACEE Emulsion Chambers." 24th Int.Cosmic Ray Conf.in Roma.2. 451-454 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] K.Asakimori et al.: "Results from an Antarctic Balloon Flight." 24th Int.Cosmic Ray Conf.in Roma.2. 752-755 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] K.Asakimori et al.: "Antarctic Balloon Flights for JACEE." 24th Int.Cosmic Ray Conf.in Roma.3. 615-619 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] O.Miyamura et al.: "Search for Long Mean Free Path Nuclei with a Balloon Borne Emulsion Chamber." 24th Int.Cosmic Ray Conf.in Roma. Vol 1. 890-893 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] K.Asakimori et al.: "High Energy Gamma Rays above 3 TeV observed by Balloon Borne JACEE Emulsion Chambers" 24th Int.Cosmic Ray Conf.in Roma. Vol 2. 451-454 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] K.Asakimori et al.: "Results from an Antarctic Balloon Flight" 24th Int.Cosmic Ray Conf.in Roma. Vol 2. 752-755 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] K.Asakimori et al.: "Antarctic Balloon Flights for JACEE" 24th Int.Cosmic Ray Conf.in Roma. Vol 3. 615-619 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] K. Asakimori et al.: "Results from an Antarctic Balloon Flight." 24th Int. Cosmic Ray Conf. in Roma. 2. 752-755 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] K. Asakimori et al.: "High Energy Gamma Rays above 3TeV Observed by Balloon Borne JACEE Emulsion Chambers." 24th Int. Cosmic Ray Conf. in Roma. 2. 451-454 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] K. Asakimori et al.: "Antarctic Balloon Flights for JACEE." 24th Int. Cosmic Ray Conf.in Roma. 3. 651-619 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] O. Miyamura et al.: "Search for Long Mean Free Path Nuclei with a Balloon Borne Emulsion Chamber." 24th Int. Cosmic Ray Conf. in Roma. 1. 890-893 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] T.Toinaga et al.: "Cosmic Ray Composition and Spectra" Proc.ot 23rd ICRC.Calgary.1. 21-24 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] M.Fuki et al.: "Cora-Sige ot Very High Energy Cascade in Emulsion Chambers." Proc.ot 23rd ICRC.Calgary.4. 159-162 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] M.Fuki et al.: "Detection Efficiencies ot Very High Energy Particles in Emulsion Chambers." Proc.ot 23rd ICRC.Calgary.4. 730-733 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] K.Asakimori et al: "Multiphoton Emission in Heavy Particle Decoys." J.ot Puys.G.20. 1257-1265 (1994)

    • Related Report
      1994 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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