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THE OBSERVATION OF PRIMARY COSMIC-RAY BY JAPAN-RUSSIA COORPORATIVE BALLOON EXPERIMENT

Research Project

Project/Area Number 11695026
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 素粒子・核・宇宙線
Research InstitutionHIROSAKI UNIVERSITY

Principal Investigator

NANJO Hirotada  HIROSAKI UNIVERSITY, FACULTY OF SCIENCE AND TECHNOLOGY PROFESSOR, 理工学部, 教授 (00106840)

Co-Investigator(Kenkyū-buntansha) MATUTANI Hideya  HIROSAKI UNIVERSITY, SCHOOL OF MEDICINE INSTRUCTOR, 医学部, 助手 (30241483)
ICHIMURA Masakatu  HIROSAKI UNIVERSITY, FACULTY OF SCIENCE AND TECHNOLOGY ASSOCIATE PROFESSOR, 理工学部, 助教授 (20232415)
KURAMATA Shuichi  HIROSAKI UNIVERSITY, FACULTY OF SCIENCE AND TECHNOLOGY PROFESSOR, 理工学部, 教授 (10215048)
SHIBATA Toru  AOYAMA GAKUIN UNIVERSITY COLLEGE OF SCIENCE AND ENGINEERING ASSOCIATE PROFESSOR, 理工学部, 助教授 (70082831)
Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥6,600,000 (Direct Cost: ¥6,600,000)
Fiscal Year 2001: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 2000: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1999: ¥2,400,000 (Direct Cost: ¥2,400,000)
KeywordsCosmic-ray / Energy Spectrum / Observation by Balloon / Emulsion Chamber
Research Abstract

This experiment has been carried out for the purpose of making clear so called "knee" in the cosmic-ray energy spectrum which is a rapid change in an inclination of spectrum. Long duration balloon flights (about 150 hours) from Kamchatka to Volga River were carried out 11 times from 1996 to 1999, and 10 flights were succeeded in the observation of cosmic-ray.
Both side of Japanese and Russian researchers visited each other countries to have a check and discussion about analyzed data, discussion about energy determination and calculation of detection efficiency, by use of this Grant-in-Aid and others. The main results obtained by this research is as follows.
1. Energy spectrum obtained by our experiment has a good agreement with the extrapolation from the lower energy spectrum.
2. Our result in proton spectrum is consistent to the result by JACEE (Japan and USA co-operative experiment) and SOKOL (Russian experiment), and flux in helium spectrum has a twice difference compared to the result … More form above two experiments.
3. Flux and slope inclination of spectrum for heavy particle has also rather large differences compared to above experiments.
These results were reported in 1999 international cosmic-ray conference held in Utah, USA and 2001 international cosmic-ray conference held in Hamburg, Germany. The flux obtained by most of air shower experiments had been giving higher value compared with our data up to 2001 conference, however, many air shower groups reported the results of flux similar to our result in 2001 conference. Moreover the result in our energy region by direct observation is only our report, and our result was highly appreciated by rapporteur.
The paper about results of the data to 1996 was published in the 22nd ISTS Proceedings (Vol. 2 p1831-1836) and Astor Particle Physics (No. 16 2001, p13-46). The data of 1999 experiment is under analysis. As 1999 experiment corresponds to four times flight, and it will take more one or two years to obtain the final results. Less

Report

(4 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report

Research Products

(27 results)

All Other

All Publications (27 results)

  • [Publications] A.V.Apanasenko et al.: "Composition and energy spectra of cosmic-ray primaries in the energy range 10^<13>-10^<15>eV/particle observed by Japanese-Russian joint balloon experiment"Astroparticle Physics. 16. 13-46 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] M.Ichimura et al.: "All particle spectrum observed by RUNJOB"Proc. of 27th International Cosmic Ray conf. 5. 1622-1625 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] M.Hareyama et al.: "Proton and Helium spectra observed by RUNJOB"Proc. of 27th International Cosmic Ray conf. 5. 1626-1629 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] T.M.Roganova et al.: "Heavy primary spectra observed by RUNJOB"Proc. of 27th International Cosmic Ray conf. 5. 1630-1633 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] P.A.Publichenko et al.: "Development of measurement system for heavy primaries identificationwithuse of screen type X-ray films in RUNJOB experiment"Proc. of 27th International Cosmic Ray conf. 6. 2131-2134 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] A. V. Apanasenko et al.: "Composition and energy spectra of cosmic-ray primaries in the energy range 10^<13> - 10^<15> eV/particle observed by Japanese-Russian joint balloon experiment"Astroparticle Phys.. 16. 13-46 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] M. Ichimura et al.: "All particle spectrum observed by RUNJOB"Proc. of 27th International Cosmic Ray Conference (Hamburg Germany). Vol. 5. 1622-1625 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] M. Hareyama et al.: "Proton and Helium spectra observed by RUNJOB"Proc. of 27th International Cosmic Ray Conference (Hamburg Germany). Vol. 5. 1626-1629 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] T. M. Roganova et al.: "Heavy primary spectra observed by RUNJOB"Proc. of 27th International Cosmic Ray Conference (Hamburg Germany). Vol. 5. 1630-1633 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] P. A. Publichenko et al.: "Development of measurement system for heavy primaries identification with use of screen type X-ray films in RUN-JOB experiment"Proc. of 27th International Cosmic Ray Conference (Hamburg Germany). Vol. 6. 2131-2134 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] A.V.Apanasenko et al.: "Composition and energy spectra of cosmic-ray primaries in the energy range 10^<13>-10^<15> eV/particle observed by Japanese-Russian joint balloon experiment"Astroparticle Physics. 16. 13-46 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Ichimura et al.: "All Particle spectrum observed by RUNJOB"Proc. of 27th International Cosmic Ray conf.. 5. 1622-1625 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Hareyama et al.: "Proton and Helium spectra observed by RUNJOB"Proc. of 27th International Cosmic Ray conf.. 5. 1626-1629 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.M.Roganova et al.: "Heavy primary spectra observed by RUNJOB"Proc. of 27th International Cosmic Ray conf.. 5. 1630-1633 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] P.A.Publichenko et al.: "Development lf measurement system for heavy primaries identification with use of screen type X-ray films in RUNJOB experiment"Proc. of 27th International Cosmic Ray conf.. 6. 2131-2134 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] A.Apanasenko et al.: "Russian Nippon Joint Balloon Experiment-Long Duration Flight from Kamchatka-"Proceedings of 22th of Int.Symposium on Space Technology and Science. Vol.2. 1831-1836 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] A.Apanasenko et al.: "Composition and energy spectra of cosmic-ray primaries in the energy region range 10^<13>〜10^<15> eV/particle observed by Japanese-Russian joint balloon experiment."Astor Particle Physics. (印刷中). (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 藤井正美 他: "日ロ共同気球実験解析結果"宇宙科学研究所大気球シンポジウム報告. 2000年12/14-15(印刷中). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] 藤井正美 他: "RUNJOBデータによるエスケープレングスについての考察"宇宙科学研究所大気球シンポジウム報告. 2000年12/14-15(印刷中). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] A.Apanasenko et al.: "Primary Cosmic Ray Spectra Observed by RUNJOB -- proton and alpha spectra"Proc.of 26th International Cosmic Ray Conference (Salt Lake City). OG.1.2.15 Vol.3. 167-170 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] A.Apanasenko et al.: "Primary Cosmic Ray Spectra Observed by RUNJOB -- spectra for heavy primaries and all particle"Proc.of 26th International Cosmic Ray Conference (Salt Lake City). OG.1.2.38 Vol.3. 231-234 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] A.Apanasenko et al.: "The Properties of Electron-Photon Component of Cosmic Rays at 10 g/cm^2"Proc.of 26th International Cosmic Ray Conference (Salt Lake City). OG.4.2.16 Vol.5. 132-135 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] A.Apanasenko et al.: "Energy Determination for RUNJOB Experiment"Proc.of 26th International Cosmic Ray Conference (Salt Lake City). OG.1.2.40 Vol.3. 235-238 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 柴田徹 他: "日露共同気球実験RUNJOB'96解析結果"宇宙科学研究所大気球シンポジウム報告. 1999-12. 49-52 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 市村雅一 他: "重一次宇宙線飛跡の解析"宇宙科学研究所大気球シンポジウム報告. 1999-12. 53-56 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 南條宏肇 他: "ジェットトリガー方式による高エネルギー一次宇宙線の検出"宇宙科学研究所大気球シンポジウム報告. 1999-12. 57-60 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 市村雅一 他: "日露共同気球実験RUNJOB'99キャンペーン報告"宇宙科学研究所大気球シンポジウム報告. 1999-12. 61-64 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-03-31   Modified: 2016-04-21  

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