Guiding of 150 keV O^(6+) ions through nanocapillaries in an uncoated Al_2O_3 membrane:special time dependence of the transmission profile width  

作　　者：陈熙萌 席发元 邱玺玉 邵剑雄 肖国青 崔莹 孙光智 王俊 陈益峰 刘会平 尹永智 王瑜玉 李德慧 娄凤君 王兴安 徐俊奎 周春林 

机构地区：[1]School of Nuclear Science and Technology,Lanzhou University [2]Institute of Modern Physics,Chinese Academy of Sciences

出　　处：《Chinese Physics B》2009年第5期1955-1960,共6页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No 10775063)

摘　　要：This paper reports that the transmission of O6＋ ions with energy of 150keV through capillaries in an uncoated Al2O3 membrane was measured, and agreements with previously reported results in general angular distribution of the transmitted ions and the transmission fractions as a function of the tilt angle well fitted to Gaussian-like functions were observed. Due tousing an uncoated capillary membrane, our φc is larger than that using a gold-coated one with a smaller value of Ep/q, which suggests a larger equilibrium charge Q∞ in our experiment. The observed special width variation with time and a larger width than that using a smaller Ep/q were qualitatively explained by using mean-field classical transport theory based on a classical-trajectory Monte Carlo simulation.This paper reports that the transmission of O6＋ ions with energy of 150keV through capillaries in an uncoated Al2O3 membrane was measured, and agreements with previously reported results in general angular distribution of the transmitted ions and the transmission fractions as a function of the tilt angle well fitted to Gaussian-like functions were observed. Due tousing an uncoated capillary membrane, our φc is larger than that using a gold-coated one with a smaller value of Ep/q, which suggests a larger equilibrium charge Q∞ in our experiment. The observed special width variation with time and a larger width than that using a smaller Ep/q were qualitatively explained by using mean-field classical transport theory based on a classical-trajectory Monte Carlo simulation.

关 键 词：guiding effect Al2O3 nanocapillaries uncoated membrane transmission profile width 

分 类 号：O484.1[理学—固体物理]