基于Matlab电磁聚焦的动力学仿真

Dynamic simulation of electromagnetic focusing based on Matlab

阐述了电磁聚焦的基本原理,基于Matlab平台使用离散动力学的方法对电子在显像管中的电磁聚焦过程进行了仿真计算.仿真结果显示,偏转电场的目标是使得电子在进入磁场之前在同一电场聚焦点具有不同大小的偏转速度,使得电子束在磁场中能够形成运动轨迹聚焦.该离散动力学的仿真方法基于牛顿运动定律,所以可以推广到所有符合牛顿运动定律的粒子运动,有很广的使用范围.

The principle of electromagnetic focusing was described in detail,and the electromagnetic focusing process of electrons in a picture tube was emulated by the method of discrete dynamics based on Matlab at the same time.The result demonstrated that the deflection field could give electrons different deflection speed at the focus point of electric filed,which could result in track focusing in the magnetic field.The method of discrete dynamics came from Newton’s law of motion and could be used in all problems that were in accordance with Newton’s law.