摘要
在利用磁聚焦法测量电子比荷的实验中,测量误差与示波管的加速电压和聚焦电压存在较大的相关性.通过对测量误差与电聚焦程度、加速电压和聚焦电压之间关系的分析,指出了误差产生的原因,给出了加速电压和聚焦电压的最佳取值范围.
There is dependence between e/m error and accelerating voltage or focus voltage in the measurement of e/m by magnetic focusing method. The curves of e/m error with degree of focus, accelerating voltage or focus voltage are analyzed, the reasons of e/m error are pointed out, and the optimum ranges of accelerating voltage and focus voltage are given.
出处
《大学物理》
北大核心
2005年第3期54-56,共3页
College Physics
关键词
电子的比荷
磁聚焦法
误差分析
e m ratio of electron
magnetic focusing method
analysis of error
