Non-Thermal Ion Populations in the Interplanetary Space

本研究的目的是了解日球层中发生的动力学，并绘制出从太阳大气层到日球层边界的日球层全局图。在行星际空间的多点同时连续观测，使我们能够研究非热离子群的组成、能谱以及在超热能和相对论能之间的广泛能量范围内的时间变化。主要研究结果如下：1)首次利用GEOTAIL卫星和WIND卫星联合观测到宇宙射线中Ar和S的异常成分。2)在高纬度观测到的银河宇宙射线（GCR）强度变化较小，表明GCR在高纬度也存在调制。3)在1AU下观测到的与自旋相互作用区（CIR）离子事件相关的高能离子，即使在通过磁扇区后也能获得连续的能量增益。与CIR事件相关的强度降低与离子强度和太阳风速度的增强有很好的相关性。4)行星际激波湍流区宇宙射线的平均自由径小于正常行星际空间的五分之一。5)离子强度在行星际空间加速的时间变化取决于事件发生的日平纬度。许多低能太阳中子是由太阳大气中的核间级联过程产生的。在太阳耀斑位置加速的高能离子具有耀斑等离子体中共振波粒相互作用产生的特征丰度。9)提出了脉冲太阳耀斑中级联Alfven波对重离子加速的机理。10)自发快速磁重联模型的实验粒子模拟表明，在三个特征区域中，地磁层重联区域的有效质子加速度是存在的。11)在重连区，当粒子在激波前有曲率漂移时，主要的加速度发生。日冕物质抛射和太阳表面粒子加速对日球层和地磁层的粒子环境有显著影响。通过这项研究，加深了对太阳、行星际空间和行星磁层之间复杂耦合系统的认识。少

The objectives of this study is to understand the dynamics occurring in the heliosphere and to draw a global picture of the heliosphere ranging from the solar atmosphere to the boundary of the heliosphere. The simultaneous and continuous observations at multi-points in the interplanetary space have allowed us to study the compostition of non-theral ion populations, their energy spectra and the time variation in a broad range of energies between spra-thermal energy and relativistic one. The main results in this study are the following :1) The anomalous component of Ar and S in cosmic rays were observed by the collaboration of GEOTAIL and WIND satellites for the first time in the world.2) It was found that small variation of galactic cosmic ray (GCR) intensity was observed at higher latitude, suggesting that GCRs are modulated even at higher latitude.3) Energetic ions associated with Corotating Interaction Region (CIR) ion events obsserved at 1AU receive continuum energy gain even after … More passing of magnetic sector region. The intensity decreases in associated with CIR events have a good correlation with the enhancement of the ion intensity and the solar wind velocity.4) The mean free path of cosmic ray in the turbulent region at interplanetary shock is one fifths or smaller than that in the normal interplanetary space.5) The temporal variation of ion intensity accelerated in the interplanetary space depends on the heliographic latitude where events occur.6) Many low energy solar neutrons are generated by internuclear cascade processes in the solar atmosphere.8) Energetic ions accelerated at the solar flare site have characteristic abundances produced by the resonant wave-particle interactions in the flare plasma.9) The mechanism of heavy ion accelerataion by cascading Alfven waves in impulsive solar flares is suggested.10) It was shown that effective proton accelerations in the reconnection regions in the geo-magnetosphere are performed in the three characteristic regions, using test particle simulations on the spontaneous fast magnetic reconnection model.11) In the reconnection regions, the dominant acceleration occurs when a particle has a curvature drift at the shock front.The particle environment in the heliosphere as well as geomagnetosphere is remarkably influenced associated with the coronal mass ejection and particle acceleration at the solar surface. The understanding of the complex coupled system between the Sun, Interplanetary space and Planetary magnetosphere, has been deepened through this study. Less