Influence of air exposure on CsI photocathodes
文献类型:期刊论文
作者 | Xie YG(谢宇广)![]() ![]() |
刊名 | NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
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出版日期 | 2012 |
卷号 | 689页码:79-86 |
关键词 | CsI photocathode Air exposure Quantum efficiency Surface morphology XPS |
英文摘要 | We investigate the influence of air exposure on the quantum efficiency (QE) and surface morphology of CsI photocathodes (PCs), at relative humidities (RH) higher than 80% down to nearly 3% (both at room temperature) and a 60 degrees C baking condition. By atomic force microscopy (AFM) surface analysis, it is clearly seen that RH > 60% speeds up water film formation and CsI dissolution on the surface of the photocathode at the minute scale, while both grain size and QE change slowly at RH <30% at the hour scale. In the baking environment, the peak QE decreases less than 1.5% (absolute) within one week, and a stainless steel substrate and electron beam evaporation technique tend to effectively weaken the influence of air. With an Au-coated FR-4 Substrate, the QE degradation is found to strongly depend on wavelength in the range of 120-210 nm. According to spectra of X-ray photoelectron spectroscopy (XPS), an excess of cesium was observed and the chemical reaction between water and CsI when exposed to humid air is proved. It is found that carbon, and not H2O or O-2, is the main pollutant in the baking condition. (C) 2012 Elsevier B.V. All rights reserved. |
学科主题 | Instruments & Instrumentation; Nuclear Science & Technology; Physics; Spectroscopy |
收录类别 | SCI |
WOS记录号 | WOS:000307797500013 |
公开日期 | 2016-05-03 |
源URL | [http://ir.ihep.ac.cn/handle/311005/223827] ![]() |
专题 | 高能物理研究所_实验物理中心 |
推荐引用方式 GB/T 7714 | Xie YG,Zhang AW,Liu YB,et al. Influence of air exposure on CsI photocathodes[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,2012,689:79-86. |
APA | 谢宇广.,章爱武.,刘颖彪.,Xie, YG.,Zhang, AW.,...&吕军光.(2012).Influence of air exposure on CsI photocathodes.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,689,79-86. |
MLA | 谢宇广,et al."Influence of air exposure on CsI photocathodes".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 689(2012):79-86. |
入库方式: OAI收割
来源:高能物理研究所
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