Interaction of H2+ molecular beam with thin layer graphene foils  

作　　者：Min Li Guo-Feng Qu Yi-Zhou Wang Zhou-Sen Zhu Mian-Gong Shi Mao-Lei Zhou Dong Liu Zi-Xu Xu Ming-Jiang Song Jun Zhang Fan Bai Xiao-Dong Liao Ji-Feng Han 李敏;曲国峰;王亦舟;朱洲森;师勉恭;周茂蕾;刘东;徐子虚;宋明江;张俊;白帆;廖小东;韩纪锋(Key Laboratory of Radiation Physics and Technology of the Ministry of Education,Institute of Nuclear Science and Technology,Sichuan University,Chengdu 610064,China;College of Physics and Electronic Engineering,Sichuan Normal University,Chengdu 610066,China)

机构地区：[1]Key Laboratory of Radiation Physics and Technology of the Ministry of Education,Institute of Nuclear Science and Technology,Sichuan University,Chengdu 610064,China [2]College of Physics and Electronic Engineering,Sichuan Normal University,Chengdu 610066,China

出　　处：《Chinese Physics B》2019年第9期164-168,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11575121);the National Magnetic Confinement Fusion Program of China(Grant No.2014GB125004)

摘　　要：The interaction of MeV H2^+ molecular ions with thin layer graphene and graphite foils was studied by using a highresolution electrostatic analyzer.A large number of fragment protons were observed at zero degree(along the beam direction) when the H2^+ beam was passing through the monolayer graphene foil, which indicates that the electron of the H2^+ molecular ions can be stripped easily even by the monolayer graphene foil.More trailing than leading protons were found in the energy spectrum, which means significant wake effect was observed in the monolayer graphene foil.The ratio of the numbers of trailing protons over leading protons first increased with the thickness for the much thinner graphene foils, and then decreased with the thickness for the much thicker graphite foils, which indicates that the bending effect of the wake field on the trailing proton varied with the foil thickness.The interaction of MeV H2+ molecular ions with thin layer graphene and graphite foils was studied by using a highresolution electrostatic analyzer.A large number of fragment protons were observed at zero degree（along the beam direction） when the H2+ beam was passing through the monolayer graphene foil, which indicates that the electron of the H2+ molecular ions can be stripped easily even by the monolayer graphene foil.More trailing than leading protons were found in the energy spectrum, which means significant wake effect was observed in the monolayer graphene foil.The ratio of the numbers of trailing protons over leading protons first increased with the thickness for the much thinner graphene foils, and then decreased with the thickness for the much thicker graphite foils, which indicates that the bending effect of the wake field on the trailing proton varied with the foil thickness.

关 键 词：H2^+ molecular ions GRAPHENE electron STRIPPING WAKE effect 

分 类 号：O4[理学—物理]