180 keV O^(6+)离子与锥形玻璃毛细管相互作用研究  

Study on the interaction between the 180 keV O^(6+) ions and the tapered glass capillary

作　　者：陈婧[1,2] 武晔虹[1,2] 刘俊亮[1,2] 薛迎利[1] 王伟[1] 阮芳芳[1] 于得洋[1] 蔡晓红[1] 

机构地区：[1]中国科学院近代物理研究所,兰州730000 [2]中国科学院研究生院,北京100049

出　　处：《原子与分子物理学报》2012年第4期608-612,共5页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(10775160);国家重点基础研究发展计划(973计划)(2010CB832901)

摘　　要：实验研究了强流(几个nA/mm^2)180 keV O^(6+)离子穿越微米尺度锥形玻璃毛细管的聚焦效应.结果表明,毛细管出口处束流密度比入口处束流密度增加了6～7倍,且出射离子保持原有的电荷态及能量.此外我们发现,当毛细管倾斜一定角度时,离子出射方向偏向毛细管管轴方向.基于自组织充电模型对上述实验结果进行了讨论.Transmission of 180keV O6＋ ions through a tapered glass macro-capillary has been investigated, in which high incident current with a magnitude of several nA/mm2 was employed. It is found that the current density was enhanced by 6~7 times after the ions transmitted through the capillary. The transmitted ions kept their original charge state and energy. It is found that the transmitted ions were deflected away from its incident direction for a small angle when the capillary was tilted. Experiment results were discussed with the self-organized charging-up model.

关 键 词：离子束聚焦 高电荷态离子 玻璃毛细管 

分 类 号：O562.5[理学—原子与分子物理]