| Autor: |
Jian Fang, Feng Shi, Tao Hu, Li Zhou, Hong-Bang Liu, Xiao Cai, Yong-Shuai Ge, Zheng Xue, Zhenghua An, Ying-Biao Liu, Yuguang Xie, Lijun Sun, Junguang Lu, Boxiang Yu, Aiwu Zhang, Yangheng Zheng, Qi-Wen Lü, Xilei Sun |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 664:310-316 |
| ISSN: |
0168-9002 |
| DOI: |
10.1016/j.nima.2011.09.067 |
| Popis: |
A quantum efficiency(QE) measurement system has been established for CsI photocathodes in the wavelength range of 120–210 nm by using the synchrotron radiation light source at Beijing Synchrotron Radiation Laboratory (BSRF). An AXUV100G photodiode calibrated by Physikalisch-Technische Bundesanstalt (PTB) was used as the transfer detector standard to ensure the accuracy and reliability of the QE measurement. The dependencies of QE measurement on beam energy, vacuum pressure and bias voltage were studied in detail. The influence of photoionization in gas on the QE measurement was observed and is described. The surface morphological characteristics of both substrate and CsI film were analyzed by atomic force microscopy (AFM). The QE results of differently prepared CsI photocathodes were compared, including: the printed circuit board (PCB) of FR-4 (Woven glass and epoxy)+Cu, FR-4+Cu/Ni/Au, and stainless steel substrates; a series of thickness from 60 to 600 nm; and the resistive and electron beam evaporation techniques. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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