The length study of bright spots in the electric deflection of electron beam
CHEN Jie,ZHU Zhan-wu,ZHANG Qin,LIU Guo-ying,ZHANG Xi-ping,WU Yun-pei
College Physics . 2017, (8): 38 -40 .  DOI: 10.16854 /j.cnki.1000-0712.2017.08.0011