基于无限大平行板的修正模型精确测量真空电容率  

Accurate measurement of vacuum permittivity based on modified model of infinite parallel plate capacitor

作　　者：梁燕[1] 孙煜婷 刘凡凡 刘一平 岑剡[2] LIANG Yan;SUN Yu-ting;LIU Fan-fan;LIU YI Ping;CEN Yan(Physics Enperimen t Teaching Cent er,Univerii ty of Science and Technology of China,Hefei 230026,China;PhysicsTeaching Laboratory,Department of Physics,Fudan University,Shanghai 200433,China)

机构地区：[1]中国科学技术大学物理实验教学中心,安徽合肥230026 [2]复旦大学物理学系物理教学实验中心,上海200433

出　　处：《物理实验》2020年第4期22-26,共5页Physics Experimentation

基　　金：中国科学技术大学教学研究项目(No.2017xjyxm074)。

摘　　要：针对实验教学中平行板电容器测量真空电容率偏差较大的问题,提出了平行板电容器的修正模型.实验对极板的非平行性进行了研究,结合了边缘效应和分布电容.修正后的模型提高了真空电容率的测量精度,其偏差下降至0.6%以下.A modified model of parallel plate capacitor is proposed to reduce the large deviation between the measured and the theoretical value of vacuum dielectric constant.By studying the non-parallelism of the plate and considering the edge field effect and distributed capacitance,the measurement accuracy of the vacuum dielectric constant is improved,and the deviation is reduced to less than 0.6%.

关 键 词：电容率 非平行板电容器 边缘效应 分布电容 

分 类 号：O482.4[理学—固体物理]