Acceleration and dynamics of energetic particles in the Jovian magnetosphere

为了研究木星磁层中高能粒子的加速度和动力学，研制了木星同步辐射观测系统。(1)对观测系统进行了改进和调试，并进行了性能实验。(3)利用327 MHz射电望远镜在名古屋大学基索天文台和富士天文台同时观测了木星同步辐射，探测到了辐射的日变化。(4)通过对NASA数据库提供的高能粒子数据的分析，得出了木星磁层顶对太阳风变化的响应和木星磁层中的粒子边界。(5)对Ulysses航天器的数据进行了分析，得到了木星磁层中的粒子边界在行星际空间发现了周期约为40min的木星高能电子的周期调制(6)作为木星辐射带的对应物，研究了地球辐射带的动力学。通过对高能电子的详细研究，发现了内磁层赤道区意想不到的俯仰角分布，这种分布与被称为EPWAT(赤道等离子体波湍流)的强等离子体波密切相关。(7)研究了与磁暴有关的外辐射带的动力学，提出了通过与风暴时间哨声模波的相互作用将热电子加速到相对论能量的机制。

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.