1996 Fiscal Year Annual Research Report

惑星間空間における非熱的粒子群の起源と加速機構

Research Project

Project/Area Number	08044093
Research Institution	Ehime University
Principal Investigator	長谷部信行愛媛大学, 工学部, 助教授 (10127904)
Co-Investigator(Kenkyū-buntansha)	REAMES. D NASA/GSFC, 米国, 上級研究員 KUNOW. H. キール大学原子核研究所, 独国, 上級研究員寺沢敏夫東京大学, 院理, 教授 (30134662) WILKEN .B. マックスプランク研究所, 独国, 上級研究員村木綏名古屋大学, 太陽地球環境研究所, 教授 (70013430) 安野静子名古屋大学, 太陽地球環境研究所, 講師 (30022586) 宗像一起信州大学, 理学部, 教授 (40221618) 林孝義早稲田大学, 理工総研, 助教授 (70156446) 道家忠義早稲田大学, 理工総研, 教授 (60063369) 三島靖愛媛大学, 工学部, 助教授 (50036191) 清水徹愛媛大学, 工学部, 講師 (60196524) 鵜飼正行愛媛大学, 工学部, 教授 (10036444)
Keywords	銀河宇宙線 / 宇宙線異常成分 / 太陽フレア- / コロナ質量放出 / 太陽大気 / 粒子加速 / 太陽共回転相互作用 / 高速再結合
Research Abstract	太陽・惑星間空間・地球の結合系で起こる大規模な磁場エネルギー解放の諸現象では、非熱的粒子群が観測される。それらの衛星観測データ、地上観測データの解析、計算機シミュレーションを介して、エネルギー解放メカニズムや、粒子の加熱・加速・伝播の物理過程の研究を発展させた。 1.GEOTAILとWINDの重粒子検出器により、静穏期における3〜150MeV/nの宇宙線強度解析の結果、宇宙線異常成分He,C,N,O,Ne,S,Arの増加を観測した。第一電離ポテンシャル10.4eVの硫黄成分を世界で最初に検出した。局所星間空間における粒子のFIP依存性に関する理解を更に明らかにした。 2.太陽共回転相互作用領域CIRの形成過程のプラズマ条件、CIRイオン強度の増加量、銀河宇宙線強度の減少量、との関係が明らかになってきた。また、回帰的なCIRが外太陽圏に伝播する間にCIRが融合し、MIRを形成して長期間MIR存在する事で、宇宙線強度が長期間減少する事が明らかになった。 3.太陽フレア-での爆発的高エネルギー現象が、磁場の高速再結合機構により成長して蓄積された磁場エネルギーを一気に解放する。これによりフレア-現象が良く説明できる事を示した。更に、MHDシミュレーションで得られる電磁場データから、粒子軌道の計算をして粒子の加速機構について研究を進める。 4.地球磁気圏尾部での低温粒子の加熱機構として、スローショック前面のフォアショックでの粒子の電磁サイクロトロン波との相互作用を提案した。磁気圏尾部で存在する3種類の粒子(H+,He++,O+)の共存から、太陽風の磁気圏尾部への寄与の重大さを示し、O+とプロトンの起源機構の違いを示した。

Research Products

(30 results)

All Other

All Publications (30 results)

[Publications] D.V.Reames,et al.: "The spatial distribution of particles accelerated by coronal mass ejection-driven shocks" Astrophys.J.vol.466. 473-486 (1996)
[Publications] B.Heber,et al.: "Spatial variation of>106MeV proton fluxes observed during the Ulysses rapid latitude scan : Ulysses COSPIN/KET results" Geophys.Res.Lett.vol.23. 1513-1516 (1996)
[Publications] T.L.Lim.et al.: "ULYSSES observations of energetic particle acceleration and the wuperposed CME and CIR events of November 1992" Ann.Geophys.vol.14. 400-410 (1996)
[Publications] C.Rastoin,et al.: "Time and space variations of the Galactic cosmic ray elsctron spectrum in the 3-D heliosphere explored by Ulysses" Astron.Astrophys.vol.307. 981-995 (1996)
[Publications] B.Wilken,et al.: "Geoactivity in Responce to CIR/CME Events-A Synoptic View" EGS meeting (Vienna). (1997)
[Publications] C.M.S.Cohen,et al.: "Kinetic temperature rations of O^<6+> and He^<2+> : observations from Wind/MASS and Ulysses/SWICS" Geophys.Res.Lett.vol.23. 1187-1190 (1996)
[Publications] T.Terasawa,et al.: "On the determination of a moving MHO structure : Minimization of the residue of integrated Faraday's equation" J.Geomag.Geoelectr.vol.48. 603-614 (1996)
[Publications] T.Terasawa: "Three dimensional structure of reconnection region" Adv.Space Res.vol.18. 273-276 (1996)
[Publications] Y.Saito,et al.: "Foreshock structure of the slow-mode shocksin the Earth's magnetotail" J.Geophys.Res.vol.101. 13267-13274 (1996)
[Publications] S.Yasue,et al.: "Calculation of the power law index for a time series by means of its fractal dimension" Fractals(Singapore). vol.4. 265-271 (1996)
[Publications] J.A.Miller,et al.: "Heavy ion acceleration by cascading Alfven waves in impulsive solar flares" AIP Conf.Proc.450-460 (1996)
[Publications] D.V.Reames: "Energetic particles from solar flares and coronal mass ejections" AIP Conf.Proc.35-44 (1996)
[Publications] M.Nakamura,et al.: "GEOTAIL observation at the dayside magnetopause--Confirmation of the reconnection events--" Adv.Space Res.(印刷中). (1997)
[Publications] K.Tsubouchi,et al.: "Bow shock expansion caused by the magnetic cloud passage on Oct.18,1995." Adv.Space Res.(印刷中). (1997)
[Publications] T.Terasawa,et al.: "Particle acceleration at the interplanetary shock ahead of a large magnetic cloud on Oct 18,1995 : GEOTAIL-WIND collaboration" Adv.Space Res.(印刷中). (1997)
[Publications] K.Seki,et al.: "Coexistence of Earth-origin O^+ and solar wind-origin H^+/He^<++> in the distant magnetotail" Geophys.Res.Lett.vol.23. 985-988 (1996)
[Publications] K.Seki,et al.: "Coexistence of earth-origin O^+ and solar wind-origin H^+/He^<++> in the distant magnetotail" Geophys.Res.Lett.,23. 985-988 (1996)
[Publications] M.Hirahara,et al.: "Cold dense ion flows with multiple components observed in the distant tail lobe by Geotail" J.Geophys.Res.vol.101. 7769-7784 (1996)
[Publications] T.Shimizu,et al.: "Particle Acceleration Simulations of the Spontaneous Fast Magnetic Reconnection Process" J.G.R.,. (投稿中). (1997)
[Publications] M.Ugai,et al.: "Computer Studies on the Spontaneous Fast Reconnection Mechanism in Three Dimesnsions" Phys.Plasmas. vol.3,No.3. 853-862 (1996)
[Publications] M.Ugai: "Computer studies on dynaics of large-scale magnetic loop by the spontaneous fast reconnection model" Phys.Plasmas. No.3. 4172-4180 (1996)
[Publications] 清水他: "離散電磁場中で断熱不変量を保存する粒子軌道計算法" 応用数理学会論文誌. Vol.5,No.4. 423-444 (1995)
[Publications] Y.Muraki,et al.: "Solar Flare and Neutron Telescope" Nuclear Physics B Supplement. (in press).
[Publications] T.Terasawa,et al.: "Solar Wind Control of Density and Temperature in the Near-Earth Plasma Sheet : WIND-GEOTAIL Collaboration" Geophys.Res.Letters. (印刷中). (1997)
[Publications] T.Takashima,et al.: "The First Observation of Sulfar in Anomalous Cosmic Rays by the Geotail and the Wind Spacecrafts" ApJ Letter. 3月号(印刷中). (1997)
[Publications] N.Hasebe,et al.: "Composition and Energy Spectra of Anomalous Cosmic Rays Observed by the GEOTAIL Satellite" Adv.Space Sci.,. (印刷中). (1997)
[Publications] K.Kondoh,et al.: "Long-Term Decrease in Galactic Cosmic Ray Intensity Associated with Recurrent CIRs" JGG. (投稿中).
[Publications] B.Willen,et al.: "Energetic Neutral Atoms in the Outer Magnetosphere an Upper Flux Limit Obtained With the HEP-LD Spectrometer on Board GEOTAIL" GRL. (投稿中).
[Publications] M.Kobayashi,et al.: "Low Energy lon Enhancements and Plasma Speed of Corotating Streams" GRL. (投稿中).
[Publications] K.Nagata,et al.: "GEOTAIL HEP-BD Data Analysis" Techinical Report : Advanced Research Institute for Science and Engineering Waseda University. No.96-37.

1996 Fiscal Year Annual Research Report

惑星間空間における非熱的粒子群の起源と加速機構

Principal Investigator

長谷部 信行 愛媛大学, 工学部, 助教授 (10127904)

Research Products

[Publications] D.V.Reames,et al.: "The spatial distribution of particles accelerated by coronal mass ejection-driven shocks" Astrophys.J.vol.466. 473-486 (1996)

[Publications] B.Heber,et al.: "Spatial variation of>106MeV proton fluxes observed during the Ulysses rapid latitude scan : Ulysses COSPIN/KET results" Geophys.Res.Lett.vol.23. 1513-1516 (1996)

[Publications] T.L.Lim.et al.: "ULYSSES observations of energetic particle acceleration and the wuperposed CME and CIR events of November 1992" Ann.Geophys.vol.14. 400-410 (1996)

[Publications] C.Rastoin,et al.: "Time and space variations of the Galactic cosmic ray elsctron spectrum in the 3-D heliosphere explored by Ulysses" Astron.Astrophys.vol.307. 981-995 (1996)

[Publications] B.Wilken,et al.: "Geoactivity in Responce to CIR/CME Events-A Synoptic View" EGS meeting (Vienna). (1997)

[Publications] C.M.S.Cohen,et al.: "Kinetic temperature rations of O^<6+> and He^<2+> : observations from Wind/MASS and Ulysses/SWICS" Geophys.Res.Lett.vol.23. 1187-1190 (1996)

[Publications] T.Terasawa,et al.: "On the determination of a moving MHO structure : Minimization of the residue of integrated Faraday's equation" J.Geomag.Geoelectr.vol.48. 603-614 (1996)

[Publications] T.Terasawa: "Three dimensional structure of reconnection region" Adv.Space Res.vol.18. 273-276 (1996)

[Publications] Y.Saito,et al.: "Foreshock structure of the slow-mode shocksin the Earth's magnetotail" J.Geophys.Res.vol.101. 13267-13274 (1996)

[Publications] S.Yasue,et al.: "Calculation of the power law index for a time series by means of its fractal dimension" Fractals(Singapore). vol.4. 265-271 (1996)

[Publications] J.A.Miller,et al.: "Heavy ion acceleration by cascading Alfven waves in impulsive solar flares" AIP Conf.Proc.450-460 (1996)

[Publications] D.V.Reames: "Energetic particles from solar flares and coronal mass ejections" AIP Conf.Proc.35-44 (1996)

[Publications] M.Nakamura,et al.: "GEOTAIL observation at the dayside magnetopause--Confirmation of the reconnection events--" Adv.Space Res.(印刷中). (1997)

[Publications] K.Tsubouchi,et al.: "Bow shock expansion caused by the magnetic cloud passage on Oct.18,1995." Adv.Space Res.(印刷中). (1997)

[Publications] T.Terasawa,et al.: "Particle acceleration at the interplanetary shock ahead of a large magnetic cloud on Oct 18,1995 : GEOTAIL-WIND collaboration" Adv.Space Res.(印刷中). (1997)

[Publications] K.Seki,et al.: "Coexistence of Earth-origin O^+ and solar wind-origin H^+/He^<++> in the distant magnetotail" Geophys.Res.Lett.vol.23. 985-988 (1996)

[Publications] K.Seki,et al.: "Coexistence of earth-origin O^+ and solar wind-origin H^+/He^<++> in the distant magnetotail" Geophys.Res.Lett.,23. 985-988 (1996)

[Publications] M.Hirahara,et al.: "Cold dense ion flows with multiple components observed in the distant tail lobe by Geotail" J.Geophys.Res.vol.101. 7769-7784 (1996)

[Publications] T.Shimizu,et al.: "Particle Acceleration Simulations of the Spontaneous Fast Magnetic Reconnection Process" J.G.R.,. (投稿中). (1997)

[Publications] M.Ugai,et al.: "Computer Studies on the Spontaneous Fast Reconnection Mechanism in Three Dimesnsions" Phys.Plasmas. vol.3,No.3. 853-862 (1996)

[Publications] M.Ugai: "Computer studies on dynaics of large-scale magnetic loop by the spontaneous fast reconnection model" Phys.Plasmas. No.3. 4172-4180 (1996)

[Publications] 清水 他: "離散電磁場中で断熱不変量を保存する粒子軌道計算法" 応用数理学会論文誌. Vol.5,No.4. 423-444 (1995)

[Publications] Y.Muraki,et al.: "Solar Flare and Neutron Telescope" Nuclear Physics B Supplement. (in press).

[Publications] T.Terasawa,et al.: "Solar Wind Control of Density and Temperature in the Near-Earth Plasma Sheet : WIND-GEOTAIL Collaboration" Geophys.Res.Letters. (印刷中). (1997)

[Publications] T.Takashima,et al.: "The First Observation of Sulfar in Anomalous Cosmic Rays by the Geotail and the Wind Spacecrafts" ApJ Letter. 3月号(印刷中). (1997)

[Publications] N.Hasebe,et al.: "Composition and Energy Spectra of Anomalous Cosmic Rays Observed by the GEOTAIL Satellite" Adv.Space Sci.,. (印刷中). (1997)

[Publications] K.Kondoh,et al.: "Long-Term Decrease in Galactic Cosmic Ray Intensity Associated with Recurrent CIRs" JGG. (投稿中).

[Publications] B.Willen,et al.: "Energetic Neutral Atoms in the Outer Magnetosphere an Upper Flux Limit Obtained With the HEP-LD Spectrometer on Board GEOTAIL" GRL. (投稿中).

[Publications] M.Kobayashi,et al.: "Low Energy lon Enhancements and Plasma Speed of Corotating Streams" GRL. (投稿中).

[Publications] K.Nagata,et al.: "GEOTAIL HEP-BD Data Analysis" Techinical Report : Advanced Research Institute for Science and Engineering Waseda University. No.96-37.

長谷部信行愛媛大学, 工学部, 助教授 (10127904)

[Publications] 清水他: "離散電磁場中で断熱不変量を保存する粒子軌道計算法" 応用数理学会論文誌. Vol.5,No.4. 423-444 (1995)