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Study on the Impulsive Plasma Wave Burst Phenomena Associated with Auroras

Research Project

Project/Area Number 09440170
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

ONO Takayuki  Tohoku Univ., Graduate School of Science, Associate Professor, 大学院・理学研究科, 助教授 (10141996)

Co-Investigator(Kenkyū-buntansha) IIZIMA Masahide  Tohoku Univ., Graduate School of Science, Associate Professor, 大学院・理学研究科, 助教授 (80232114)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥6,800,000 (Direct Cost: ¥6,800,000)
Fiscal Year 1998: ¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 1997: ¥3,600,000 (Direct Cost: ¥3,600,000)
KeywordsAkebono (EXOS-D) / auroal ionosphere / electrostatic Whistler mode / impulsive burst / database / beam plasma instability / low energy electrons / plasma waves / 静電的ホイッスラーモード波 / 瞬時性バースト / 温度異方性型プラズマ不安定 / プラズマ波動 / 静電的ホイッスラ-モード波
Research Abstract

Plasma Waves and Sounder (PWS) Experiment on board the Akebono (EXOS-D) satellite has been successfully carried out through the entire regions along the satellite orbit with initial perigee, apogee and inclination of 300 kin, 10,500 km and 68゚, respectively ; the observation have also been made in the polar ionosphere covering from low to high altitude ranges. The high altitude observation in the polar region is aimed to explore the acceleration region of auroral particles ; in the low altitude polar ionosphere, on the other hand, observations have been made for sounding the energy dissipation region related to formation of auroras and ionospheric disturbances. Strong interactions of the auroral particles with ionospheric plasma with neutral gases makes disturbed states in entire altitude range of the auroral thermosphere.
The present research work has been focused on the emissions of impulsive plasma wave burst (IPB) observed in the frequency range of the whistler mode waves in the low … More altitude polar ionosphere below 2,000 km by using electric field detecting antenna of plasma waves and sounder experiment (PWS) on-board the Akebono satellite. Within the research period form 1997 to 1998, the research activities have been directed to the theoretical research of the wave particle interactions in the polar ionosphere as well as data archiving and analysis of PWS data from the Akebono (EXOS-D) satellite.
The results of the data analysis shows that the emissions of IPB are frequently observed indicating a group of intense impulses with electric field amplitude of several hundreds muV/m to several mV/m. The propagation directions identified by using the spin modulation effect on the electric fields detected with the two sets of dipole antennas showed that IPB's belong to the electrostatic whistler mode plasma waves whose wave number vectors have a large propagation angle from the ambient magnetic field. The origin of impulsive signatures of emissions can be attributed to the manifestation of the short lived nature of excited waves ; namely, the duration time is estimated to be in the range from 20 to 200 msec. These major characteristics of IPB are consistently interpreted with the theorecal approach to the whistler mode branch of the plasma waves, calculating the dispersion relation in the regime of electrostatic whistler mode waves under the condition of beam plasma instability related to the low energy electron beam in the F-region and topside ionosphere of the polar region. The short lived feature of IPB is understood as being resulted by severe damping effects of the electrostatic whistler mode plasma waves when the waves enter into the space of non free energy. The observation region of IPB is then limited in the region close to plasma instability that is possibly caused by the low energy electrons associated with auroras. Though the quest for origin of the impulsive generation of low energy electrons is deferred for future studies, it is inferred that the auroral particle precipitation into the polar ionosphere generates suprathermal electron beams forming successive groups with periodic modulation. Less

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] Ono, T., A.Morioka, A.Kumamoto, H.Oya, K.Kobayashi, T.Obara, and T.Nakagawa: "Plasma Waves and Sounder(PWS)Experiment on-board the Planet-B Mars Orbiter" Earth, Planets and Space. 50. 213-222 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Oya, H.and T.Ono: "A New Altimeter for Mars Land Shape Observation Utilizing the Ionospheric Sounder System on board the Planet-B Spacecraft" Earth, Planets and Space. 50. 229-234 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yamamoto, M., T.Oho, H.Oya, R.T.Tsunode, M.F.Larsen, S.Fukao, and M.Yamamoto: "Structures in sporadic-E observed with an impedance probe during the SEEK campaign : Comparison with neutral-wind and radar-echo observations" Geophys. Res.Lett.25. 1781-1784 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Oya, H., M.Iizima, A.Morioka, and H.Murao: "Extremely large enhancements of the Jovian decameter radio bursts caused by the megnetosphere-plasmasphere passages of Shoemaker-Levy 9 comet fragments" J.Geomag. Geoelectr.49. s49-s66 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Misawa, H., H.Oya, and M.Iizima: "Polarization Characteristics of Io-related Jovian Decametric Radiations" J.Geomag. Geoelectr.49. s67-s78 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kumamoto, A., and H.Oya: "Asymmetry of occurrence-frequency and intensity of AKR between summer polar region and winter polar region sources" Geophys Res.Lett.25. 2369-2372 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Oya, H., M.Iizima, A.Morioka, and H.Murao: "Extremely large enhancements of the Jovian decameter radio bursts caused by the magnetosphere - Plasmasphere passages of Shoemaker-Levy 9 comet fragments - Evolution of Jovian decametric radiation feature into the state ofi ntense decametric pulsar" J.Geomag.Geoeiectr.vol.49. S49-S66 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Misawa, H., H.Oya, and M.Iizima: "Polarization characteristics of lo-related Jovian decametric radiations" J.Geomag.Geoelectr.vol.49. S67-S78 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Ono, t., H.Oya, A.morioka, A.Kumamoto, K.Kobayashi, T.Obara, and T.Nakagawa: "Plasma waves and sounder (PWS) experiment onboard the PLANET-B Mars orbiter" Earth Planets Space. vol.50. 213-222 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] H.Oya and T.Ono: "A new altimeter for Mars land shape observations utilizing the ionospheric sounder system onboard the Planet-B spacecraft" Earth Planets Space. vol.50. 229-234 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Okada and T.Ono: "Application of altimeter experiments of Planet-B orbiter to the exploration of Martian surface surface and subsurface layers" Earth Planets Space. vol.50. 235-240 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yamamoto, M., T.Ono, H.Oya, R.T.Tsunoda, M.F.Larsen, S.Fukao, and M.Yamamoto: "Structures in sporadic-E observed with an itnpedance probe during the SEEK campaigh : Comparisions with neutral-wind and radar-echo observations" Geophys.Res.Lett.vol.25. 1781-1784 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kumamoto, A.and H.Oya: "Asymmetry of occurrence-frequency and intensity of AKR between summer polar region and winter polar region sources" Geophys.Res.Lett.vol.25. 2369-2372 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Ono, T.and H.Oya: "Short lived electrostatic whistler mode plasma waves in the low altitude polar ionosphere observed by the Akebono (EXOS-D) satellite" Earth Planets Space. (submitted). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Ono,A.Morioka,A.Kumamoto,H.Oya,K.Kobayashi,T.Obara and T.Nakagawa: "Plasma Waves and Sounder(PWS)Experiment on-board the Planet-B Mars Orbiter" Earth,Planets and Space. 50. 213-222 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] H.Oya and T.Ono: "A New Altimeter for Mars Land Shape Observation Utilizing the Ionospheric Sounder System on board the Planet-B Spacecraft" Earth,Planets and Space. 50. 229-234 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] M.Yamamoto,T.Ono,H.Oya,R.T.Tsunode,M.F.Larsen,S.Fukao and M.Yamamoto: "Structures in sporadic-E observed with an impedance probe during the SEEK campaign:Comparison with neutral-wind and radar-echo observations" Geophys.Res.Lett.25. 1781-1784 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Oya,H.,M.Iizima,A.Morioka,and H.Murao: "Extremely large enhancements of the Jovian decameter radio bursts caused by the megnetosphere-plasmasphere passages of Shoemaker-Levy 9 comet fragments" J.Geomag.Geoelectr.49. s49-s66 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Misawa,H.,H.Oya,and M.Iizima: "Polarization Characteristics of Io-related Jovian Decametric Radiations" J.Geomag.Geoelectr.49. s67-s78 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] T.Ono, A.Morioka, A.Kumamoto, H.Oya, K.Kobayashi, T.Obara, and T.Nakagawa: "Plasma Waves and Sunder (PWS) Experiment on-doard the Planet-B Mars Orbiter" Earth,Planets and Space. (in press). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Oya and T.Ono: "A New Altimeter for Mars Land Shape Observation Utilizing the Ionospheric Sounder System on board the Planet-B Spacecraft" Earth,Planets and Space. (in press). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] M.Yamamoto, T.Ono, H.Oya, R.T.Tsunoda, M.F.Larsen, S.Fukao, and M.Yamamoto: "Struchures in sporadic-E observed with an impedance probe during the SEEK campaign : Comparison with neutral-wind and radar-echo obsevations" Ceophys.Res.Lett.(in press). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Oya.H., M.Iizima, A.Morioka, and H.Murao: "Extremely large enhancements of the Jovian decameter radio bursts caused by the megnetosphere-plasmashere passages of shoemaker-Levy 9 comet fragments" J.Geomag.Geoelectr.(in press). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Misawa, H., H.Oya and M.Iizima: "Ploarization Characteristice of Io-related Jovian Decametric Raditions" J.Geomag.Geoelectr.(in press). (1998)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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