低成本线性保罗阱演示装置
College Physics（2023）
北京师范大学
Abstract
本文介绍一种低成本线性保罗阱演示实验装置的制作方法.利用霓虹灯变压器作高压电源,用4根不锈钢圆柱作电极,得到交变的类四极电场.将带电孢子粉撒入电极包围的区域,带电量合适的孢子会被交变电场俘获.用激光照射,可以清楚观察到粒子局域化的运动轨迹.利用Matlab采用简化的电势模型对保罗阱的电势分布进行了数值计算,结合粒子所受到的重力、电场力和空气阻力等对粒子运动轨迹进行模拟,并估算出粒子所带的电荷量.
MoreKey words
linear Paul trap,physics demonstration experiment
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