1、第二章 静电模型,第三节 粒子移动格式的精度 假定有一简谐运动,其解为,对有限差分蛙跳格式,假定,则有,可得,第四节 网格-粒子云-蛙跳动力论,共振因子,Electrostatic Solitary Structures in 2D plasma,The observations of the Fast satelliteErgun et al., GRL, 1998.,Characteristics：,1. The structures have a positive potential signature. 2. The parallel slicing of parallel elect
2、ric field has bipolar structures. 4. The parallel slicing of perpendicular electric field has unipolar structure.5. Debye-scale size in the parallel direction.,The stacked profiles of the electric fields from 1D PIC simulations.,The electric field and phase-space diagram of electrons from 1D PIC sim
3、ulations.,Multi-dimensional structureFrom Chen, GRL, 2003,2D PIC simulations,Case 1:,Electron bi-stream instability: initially two electron components have same density and temperaturemi/me=1836Vb=3.5vth,2D PIC simulations,Case 2:,Electron bi-stream instability: two electron components have same den
4、sity and temperaturemi/me=1836Vb=3.5vth,The parallel slicing of parallel and perpendicular electric fields at .,The charge density and perpendicular electric field along the perpendicular direction in the hole at .,The perpendicular electric field along the perpendicular direction in the hole at different time. The solid, dash and dot lines represent , and,
