Focusing of 90 keV O⁶⁺ ions through a single tapered glass macrocapillary

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• 作者：Jing Chen^a ; ^b ; Yingli Xue^a ; Junliang Liu^a ; ^b ; Yehong Wu^a ; ^b ; Fangfang Ruan^a ; Wei Wang^a ; ^b ; Deyang Yu^a ; Xiaohong Cai^a ; ^{caixh@impcas.ac.cn}
• 关键词：Ion beam focusing ; Tapered glass capillary ; Highly charged ions
• 刊名：Nuclear Instruments and Methods in Physics Research Section B ; Beam Interactions with Materials and Atoms
• 出版年：2012
• 期刊代码：42_0168583x
• 类别：ph
• 出版时间：15 June, 2012
• 卷：281
• 期：Complete
• 页码：26-29
• 文件大小：419 K

摘要

Transmission of O⁶⁺ ions through a tapered glass capillary with a diameter of 0.2 mm at the exit has been investigated, in which high incident current with a magnitude of several nA/mm² was employed. The majority of ions passing through the capillary deviated from their incident directions, but kept their charge state and energy even when the capillary was tilted with an angle less than the opening angle. The present results indicate that the focusing effect can also be obtained in the transmission of medium energy ions through a tapered glass macrocapillary and show a rough linear relationship between the transmission probability and the ions perpendicular energy.