磁聚焦法测量电子荷质比实验中励磁电流测量方法的研究  

Investigation on the method of measuring field current in the experiment of measuring electron charge mass ratio using electron magnetic focusing

作　　者：王玉清[1] 杨能勋[1] 薛琳娜[1] 

机构地区：[1]延安大学物理与电子信息学院,陕西延安716000

出　　处：《大学物理》2012年第3期44-46,共3页College Physics

基　　金：延安大学重点扶持学科物理课程与教学论项目资助

摘　　要：根据电荷在电场、磁场中的运动特点,分析了磁聚焦法测量电子荷质比的原理;利用磁场叠加原理,从理论角度探讨了测量磁聚焦时励磁电流的方法,并对各种方法进行了比较;从实验角度对实验数据分析处理,指出了误差产生的主要原因之一,得出了测量磁聚焦时励磁电流值的新方法.According to the motion characteristic of the charge in the electric and magnetic fields, the principle for measuring electron charge mass ratio using electron magnetic focusing is analyzed. The method for measuring field current with magnetic focusing is discussed from the theoretical point of view by using principle of magnetic fields superposition, and vaious methods are compared. The experimental data are analyzed and managed from the experiment point of view, the one of the main reason of error production is pointed out and the new method for measuring the value of field current with magnetic focusing is obtained.

关 键 词：电子荷质比 励磁电流 环境磁场 磁聚焦 电聚焦 误差 

分 类 号：O441.5[理学—电磁学]