中文摘要：

在电流零以后，它是一旦当真空电路断路器打断一条真空弧时，鞘开发是在绝缘的恢复进程的第一进程。当高水流的真空弧被打断时，一个轴的磁场(AMF ) 广泛地在真空电路断路器被使用。因此，在鞘发展学习不同 AMF 振幅的影响是很重要的。这份报纸的目的是从一个微观点在鞘发展学习不同 AMF 振幅的影响。因此，在房间的粒子 -- 蒙特卡罗碰撞(PIC-MCC ) 方法被采用开发鞘发展模型。我们把模拟结果与试验性的结果作比较然后验证了模拟。我们也在不同 AMF 振幅下面获得了鞘发展和离子的精力密度的速度。结果看了那 AMF 振幅越大，鞘开发越多 faster 并且更低离子精力密度是，意味着故障是相应地更困难。

英文摘要：

After current zero,which is the moment when the vacuum circuit breaker interrupts a vacuum arc,sheath development is the first process in the dielectric recovery process.An axial magnetic field（AMF） is widely used in the vacuum circuit breaker when the high-current vacuum arc is interrupted.Therefore,it is very important to study the influence of different AMF amplitudes on the sheath development.The objective of this paper is to study the influence of different AMF amplitudes on the sheath development from a micro perspective.Thus,the particle in cell-Monte Carlo collisions（PIC-MCC） method was adopted to develop the sheath development model.We compared the simulation results with the experimental results and then validated the simulation.We also obtained the speed of the sheath development and the energy density of the ions under different AMF amplitudes.The results showed mat the larger the AMF amplitudes are,the faster the sheath develops and the lower the ion energy density is,meaning the breakdown is correspondingly more difficult.