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Acceleration and dynamics of energetic particles in the Jovian magnetosphere

Research Project

Project/Area Number 12440129
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Space and upper atmospheric physics
Research InstitutionTohoku University

Principal Investigator

MORIOKA Akira  Tohoku University, Graduate School of Science, Professor, 大学院・理学研究科, 教授 (50004479)

Co-Investigator(Kenkyū-buntansha) TSUCHIYA Fuminori  Tohoku University, Graduate School of Science, Research Associate, 大学院・理学研究科, 助手 (10302077)
MISAWA Hiroaki  Tohoku University, Graduate School of Science, Associate Professor, 大学院・理学研究科, 助教授 (90219618)
Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥12,600,000 (Direct Cost: ¥12,600,000)
Fiscal Year 2001: ¥4,500,000 (Direct Cost: ¥4,500,000)
Fiscal Year 2000: ¥8,100,000 (Direct Cost: ¥8,100,000)
Keywordsenergetic particles / Jovian magnetosphere / Jovian radiation belt / synchrotron radiation / Jovian radio waves / particle dynamics / relativistic particles / antenna
Research Abstract

To study the acceleration and dynamics of energetic particles in the Jovian magnetosphere, the development of the observation system for Jovian synchrotron radiation was performed.
(1) After the improvement and adjustment of the observation system, the performance experiments was carried out. And the system has been established.
(2) The software for the automatic operation, including the phase and gain calibration was successfully completed, which are essential to detect the absolute intensity of the Jovian synchrotron radiation for a long term.
(3) The simultaneous observations of the Jovian synchrotron radiation at Kiso and Fuji observatories, Nagoya University, using the 327 MHz radio telescopes were carried out, and detected the daily variation of the radiation.
(4) From the analyzes of the energetic particle data provided from NASA database, the response of the Jovian magnetopause for the solar wind variation and particle boundary in the Jovian magnetosphere were derived.
(5) The data analyzes of the Ulysses spacecraft, the periodic modulation of Jovian energetic electrons with the period of about 40 min was discovered in interplanetary space
(6) The dynamics of the earth's radiation belts was studied as the counter part of the Jovian radiation belt. From the detailed investigation of energetic electrons, unexpected pitch angle distributions in the equatorial region in the inner magnetosphere were discovered, which is strongly related to the intense plasma waves called EPWAT (equatorial plasma wave turbulence).
(7) The dynamics of the outer radiation belt associated with magnetic storms was studied, and proposed the mechanism to accelerate hot electrons to relativistic energies through the interaction with the storm time whistler mode waves.

Report

(3 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • Research Products

    (33 results)

All Other

All Publications (33 results)

  • [Publications] Misawa, H.: "Observation of Jovian decimetric radiation at a frequency of 327 MHz"Advanced Space Research. 26. 1537-1540 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nakagawa, F.: "On the source of Jovian hectometric radiation"Advanced Space Research. 26. 1541-1544 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Miyoshi, Y.: "Observation of short term variation of Jovian synchroton radiation at a frequency of 2290MHz"Advanced Space Research. 26. 1533-1536 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Takahashi, S.: "Distribution of sodium cloud near lo and in the inner Jovian magnetosphere"Advanced Space Research. 26. 1529-1532 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nozawa, H.: "Variability of Sll emission from the Io plasma torus"Advanced Space Research. 26. 1525-1528 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Miyoshi, Y.: "Long term modulation of low altitude proton radiation belt by the Earth's atmosphere"Geophysical Research Letters. 27. 2169-2172 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Morioka, A.: "Pitch angle distribution of relativistic electrons in the inner radiation belt and its relation to equatorial plasma wave turbulence phenomena"Geophysical Research Letters. 28. 931-934 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Watanabe, T.: "Development of observation system for the Jovian synchrotron radiation at 327 MHz"Tohoku Geophysical Journal. Ser.5,36. 25-37 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Miyoshi, Y.: "Observation of short term variation of Jovian synchrotron radiation"Journal of the Communications Research Laboratory. 48. 165-172 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Obara, T.: "Large enhancement of the outer belt electrons during magnetic storms"Earth Planets Space. 53. 1163-1170 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Misawa, H.: "Newly developed meter to decimeter wave range radio telescope for the investigation of planetary environments"Proceedings of the 34th ISAS Lunar and Planetary Symposium. 175-178 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 三好 由純: "木星シンクロトロン放射強度短期時間変動の観測"通信総合研究所季報. 47. 169-177 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Misawa, H.: "Observations of Jovian decimetric radiation at a frequency of 327 MHz"Adv. Space Res.. Vol. 26, No. 26. 1537-1540 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nakagawa, F.: "On the source of Jovian hectometric radiation"Adv. Space Res.. Vol. 26, No. 10. 1541-1544 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Miyoshi, Y.: "Observation of short term variation of Jovian synchrotron radiation at a frequency of 2290 MHz"Adv. Space Res.. Vol. 26, No. 10. 1533-1536 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Takahashi, S.: "Distribution of sodium cloud near lo and in the inner Jovian magnetosphere"Adv. Space Res.. Vol. 26, No. 10. 1529-1532 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nozawa, H.: "Variability of SII emission from the lo plasma torus"Adv. Space Res.. Vol. 26, No. 10. 1525-1528 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Miyoshi, Y.: "Long term modulation of low altitude proton radiation belt by the Earth's atmosphere"Geophys. Res. Lett.. Vol. 27. 2169-2172 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Morioka, A.: "Pitch angle distribution of relativistic electrons in the inner radiation belt and its relation to equatorial plasma wave turbulence phenomena"Geophys. Res. Lett.. Vol. 28, No. 5. 931-934 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Watanabe, T.: "Development of observation system for the Jovian synchrotron radiation at 327 MHz"Tohoku Geophys. J.. Ser. 5., 36. 25-37 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Miyoshi, Y.: "Observation of short term variation of Jovian synchrotron radiation"J. Commu. Res. Lab.. 48. 165-172 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Obara, T.: "Large enhancement of the outer belt electrons during magnetic storms"Earth Planets Space. 53. 1163-1170 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Misawa, H.: "Newly developed meter to decimeter wave range radio telescope for the investigation of planetary environments"Proceedings of the 34th ISAS Lunar and Planetary Symposium. 175-178 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Miyoshi, Y.: "Observation of short term variation of Jovian synchrotron radiation (in Japanese)"Rept. Commu. Res. Lab.. 47. 169-177 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Watenabe, T. 他6名: "Development of observation system for the Jovian synchrotron radiation at 327 MHz"Tohoku Geophysical Journal. Ser.5,36. 25-37 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Miyoshi, Y. 他5名: "Observation of short term variation of Jovial synchrotron radiation"Journal of the Communications Research Laboratory. 48. 165-172 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Obata, T. 他2名: "Large enhancement of outer belt electrons during magnetic storms"Earth Planets Space. 53. 1163-1170 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Misawa, H. 他6名: "Newly developed meter to decimeter wave rango radio telescope for the investigation of planetary environments"Proceedings of the 34th ISAS Lunar and Planetary Symposium. 175-178 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 三好 由純 他5名: "木星シンクロトロン放射強度短期時間変動の観測"通信総合研究所季報. 47. 169-177 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Morioka,A.: "Pitch angle distribution of relativistic electrons in the inner radiation belt and its relation to equatorial plasma wave turbulence phenomena"Geophysical Research Letters. 28. 931-934 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Misawa,H.: "Observation of Jovian decimetric radiation at a frequency of 327 MHz"Advanced Space Research. 26. 1537-1540 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Nakagawa,F.: "On the source of Jovian hectometric radiation"Advanced Space Research. 26. 1541-1544 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Miyoshi,Y.: "Observation of short term variation of Joviant synchroton radiation at a frequency of 2290MHz"Advanced Space Research. 26. 1533-1536 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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