项目名称: 用粒子模拟方法研究太阳磁场重联中的波动
项目编号: No.11203083
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 天文学、地球科学
项目作者: 黄宇
作者单位: 中国科学院紫金山天文台
项目金额: 29万元
中文摘要: 太阳大气中的磁场重联是太阳物理必须要解决的关键问题之一,至今还有很多 问题没有搞清楚,例如:磁场重联中激波加速粒子的效率以及与其它加速机制的比较,反常 电阻在磁场重联过程中的产生机制、位置和大小,以及电磁波的产生过程和能量来源等。本 人准备使用2.5 维粒子模拟(PIC)方法实现对这些复杂的过程的模拟计算,以便深入了解 磁场重联的物理机制,集中解决以下几个问题:1)了解激波的产生过程和其对粒子加速的 贡献,进而与其它加速机制进行比较。2)研究重联过程中反常电阻的产生机制、大小和位 置,并通过参数的变化来研究反常电阻对磁重联的影响。3)分析磁场重联中的电磁波的产 生过程和能量转化。
中文关键词: 等离子体辐射机制;粒子模拟;离子声波;朗缪波;
英文摘要: Magnetic reconnection in the solar atmosphere play an important role of solar physics. However, the details of the solar magnetic reconnection are still unclear, such as: the efficency of particle acceleration by magnetic reconnection shork wave? The excite machanism of anomalous resistivity in the process of solar magnetic reconnection, as well as the electromagnetic wave generation machanism and the conversion process. We plan to simulate this complex physical process by using the 2.5 dimensional particle in cell simulation method,for better understanding the physical mechanism of magnetic reconnection.We focus to solve the following problems: 1)Simulate the shock wave generation process and study how the shock wave accelerate the particles, and then compared with other acceleration mechanisms. 2)To study the details of anomalous resistivity in solar magnetic reconnection process, and by changing the simulation parameters to study the correlation between the anomalous resistivity and the magnetic reconnection. 3)To analysis the excite machanism of electromagnetic waves during the magnetic reconnection and energy conversion process.
英文关键词: plasma emission mechanism;partical in cell simulation;ion sound waves;langmuir waves;