Cold Electron Source with an Electron Multiplier Illuminated by Ultraviolet Photons

被引：3
|
作者：
Kim, Hyun Sik [1 ]
Kim, Seung Yong [1 ]
Yang, Mo [1 ]
机构：
[1] Korea Basic Sci Inst, Mass Spectrometry Res Div, Ochang 363883, Chungcheungbuk, South Korea
来源：
ANALYTICAL CHEMISTRY | 2012年 / 84卷 / 08期
关键词：
MASS-SPECTROMETER; FIELD-EMISSION;
D O I：
10.1021/ac203486u
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A cold electron source has been developed using a microchannel plate (MCP) electron multiplier. Primary electron emission is initiated by illumination with ultraviolet photons from a diode. Final electron emission currents of up to 10 mu A in continuous wave (CW) mode and 10 mA in pulsed mode have been achieved from a MCP with an active diameter of 5.5 mm. Electron emission generated by UV photons with a wavelength of 260 nm has been shown to be about 30 times more efficient than emission generated by photons with a wavelength of 300 nm. Application of this cold electron source in mass spectrometry is discussed.
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页码：3635 / 3639
页数：5
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