Transmission of keV O- ions through a single tapered glass capillary

被引：3
|
作者：
Pan, P. [1 ]
Niu, S. T. [1 ]
Song, H. Y. [1 ]
Chen, X. M. [1 ]
Qiu, X. Y. [1 ]
Shao, J. X. [1 ]
机构：
[1] Lanzhou Univ, Sch Nucl Sci & Technol, South Tianshui Rd 222, Lanzhou 730000, Gansu, Peoples R China
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2019年 / 450卷
基金：
中国国家自然科学基金;
关键词：
Transmission; Tapered glass capillary; Negative ions; Focusing; NEGATIVE-IONS; ELECTRON; OXYGEN; ATOMS;
D O I：
10.1016/j.nimb.2018.08.024
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
An experimental study of 14 keV O- ions transmission through a tapered glass capillary with the inlet diameters of 580 pm, an outlet diameter of 68 pm and a length of 45 mm, has been performed in this work. It indicates that the O- ions transmitting through the tapered capillary had a density enhancement of about 5.5 times with the tilt angle of 0 degrees. It was found that more than 97% of the transmitted and focused ions remained their initial charge state in central area. It's the first time that focusing effect was observed and was reported in experiment for negative ions. The angular distribution of transmitted ions was narrow. These results clearly indicated that the focusing effect can be achieved in the transmission process of keV O- ions through a tapered glass capillary.
引用
收藏
页码：332 / 336
页数：5
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