3维楔形阴极场致发射模型

分析了场致发射的物理机理，在3维Yee网格模型的基础上导出并实现了场致发射的发射条件，并引入Pade网格算法加密尖端网格。以一个楔形阴极场致发射模型为例得到了场致发射的伏安特性曲线，并且在高电压时得到了3/2次方的空间电荷限制流。同时为了解决粒子数与网格的巨大引起的计算量大的问题，引入了消息传递机制并行算法，得到3.0以上的并行加速比。

Three dimensional wedge-shaped cathode field emission model

The physical mechanism of field emission was analyzed. The launch conditions of field emission in three-dimensional Yee grid model were deduced and implemented, and the Pade grid algorithm was used to encrypt the cutting-edge grid. The current-voltage relationship and the 3/2 power of the space charge limited flow at high voltage were obtained for a wedge-shaped cathode field emission model, which verify the correctness of simulation. In order to deal with the great amount of computation due to large particle number and huge grid, the message passing interface (MPI) was used, and a more than 3.0 parallel speedup was obtained.