Numerical Modeling of Magnetospheric Dynamics

将研究与地球磁层中的极光和亚暴动力学有关的物理过程的数值模拟。一个数值模型将解决极光电子加速的问题。计算中将包括适当的边界条件和碰撞的作用。将研究等离子体(特别是重离子)从电离层到等离子体片的传输。该模型应该能够解释等离子体片中O+离子的存在。对流电场可以使极帽上方的离子加速。离子在亚暴动力学中的作用将通过数值模式来确定。磁感应粒子编码将被用来模拟场对齐电流。该模型考虑了自洽磁场中非绝热粒子运动的影响。该模式应该能够提供极光电喷流与近地等离子体片之间风暴时间相互作用的信息。该模型的计算结果将有助于理解会聚磁场中电流驱动的离子回旋加热。关于离子二次曲线和微双层的信息也将从这个模型中获得。

Numerical modeling of physical processes related the aurora and substorm dynamics in the earth's magnetosphere will be studied. A numerical model will address the question of acceleration of auroral electrons. Appropriate boundary conditions and the role of collisions will be included in the calculations. The study of the transport of plasma (especially heavy ions) from the ionosphere to the plasma sheet will be conducted. The model should be able to explain the presence of O+ ions in the plasma sheet. The convection electric field can accelerate the ions over the polar cap. The role of ions in the substorm dynamics will be established by the numerical model. A magneto-inductive particle code will be used to model field- aligned currents. The model includes the effects of non- adiabatic particle motion in the self-consistent magnetic field. This model should be able to provide information on the storm- time interaction between auroral electrojet and the near-earth plasma sheet. The results from this model calculations will be useful in understanding current-driven ion cyclotron heating in a converging magnetic field. Information on the ion conics and micro-double layers also will available from this model.