刻槽绝缘平行板对电子束的导向效应研究  

Guiding Effect of Electron Beam by Grooved Insulating Parallel Plates

作　　者：张明武[1] 薛迎利[1] 李鑫[1] 刘俊亮[1] 于得洋[1] 杨变[1] 王伟[1] 郭义盼 黎晓晓 杨丽萍 习薇 朱小娜[1] 张月昭 邵曹杰[1] 蔡晓红[1] ZHANG Mingwu;XUE Yingli;LI Xin;LIU Junliang;YU Deyang;YANG Bian;WANG Wei;GUO Yipan;LI Xiaoxiao;YANG Liping;XI Wei;ZHU Xiaona;ZHANG Yuezhao;SHAO Caojie;CAI Xiaohong(Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, Chin)

机构地区：[1]中国科学院近代物理研究所,兰州730000

出　　处：《原子核物理评论》2018年第2期204-209,共6页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(11205224;11275240;U1332206)~~

摘　　要：采用不同材质的刻槽绝缘平行板,包括高纯度石英玻璃、聚四氟乙烯(Teflon)、酚醛树脂(电木)和聚甲醛板(赛钢板),并在15 p A/mm^2～14.3 n A/mm^2范围内改变入射流强,利用1 500 e V电子束入射上述绝缘平行板,实验研究了上述平行板对电子束的导向行为。实验发现,上述电子束通过上述平行板时存在明显的导向现象,其导向行为与束流流强和绝缘材质无关。据此,可排除绝缘平行板内表面沉积电荷自组织充放电过程中,以绝缘材料的面电阻和体电阻对地泄放的线性形式放电过程。Adopting several grooved parallel plates made by different insulators, such as high-purity fused quartz, Teflon, Bakelite and POM（Polyformaldehyde）, and further adjusting the electron beam current in a wide range（tens of p A～tens of n A）, the discharging mechanism in the self-organizing charge and discharge processes of electron guiding was investigated and discussed by using 1 500 e V incident electron beam. The present results show that, the electron guiding behaviors are obviously existing when such electron beam is transmitted through the above grooved insulating parallel plates, which are independent on beam current and insulators. Our results suggest that, the possibilities of the accumulated charges on inner-surface of grooved parallel plates linearly discharging through surface and bulk resistances of plates into the ground should be excluded.

关 键 词：导向效应 电子束 刻槽平行板 自组织充放电 

分 类 号：O562.5[理学—原子与分子物理]