Silicon PIN photodiode applied to acquire high-frequency sampling XAFS spectra  

作　　者：Yun-Peng Liu Lei Yao Bing-Jie Wang Jia-Jun Zhong Hao Wang Li-Xiong Qian Zhong-Jun Chen Guang Mo Xue-Qing Xing Wei-Fan Sheng Zhong-Hua Wu 

机构地区：[1]Beijing Synchrotron Radiation Facility,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing,100049,China [2]University of Chinese Academy of Sciences,Chinese Academy of Sciences,Beijing,100049,China

出　　处：《Nuclear Science and Techniques》2022年第7期15-24,共10页核技术（英文）

基　　金：supported by the National Key R&D Program of China(Nos.2017YFA0403000 and 2017YFA0403100).

摘　　要：Experimental techniques based on SR facilities have emerged with the development of synchrotron radiation(SR)sources.Accordingly,detector miniaturization has become significant for the development of SR experimental techniques.In this study,the miniaturization of a detector was achieved by coupling a commercial silicon PIN photodiode(SPPD)into a beamstop,aiming for it not only to acquire X-ray absorption fine structure(XAFS)spectra,but also to protect the subsequent two-dimensional detector from high-brilliance X-ray radiation damage in certain combination techniques.This mini SPPD detector coupled to a beamstop was used as the rear detector in both the conventional sampling scheme and novel high-frequency(HF)sampling scheme to collect the transmission XAFS spectra.Traditional ion chambers were also used to collect the transmission XAFS spectra,which were used as the reference.These XAFS spectra were quantitatively analyzed and compared;the results demonstrated that the XAFS spectra collected by this SPPD in both the conventional sampling scheme and HF sampling scheme are feasible.This study provides a new detector-selection scheme for the acquisition of the quick-scanning XAFS(QXAFS)and HF sampling XAFS spectra.The SPPD detector presented in this study can partially meet the requirements of detector miniaturization.

关 键 词：Silicon PIN photodiodes Beamstop XAFS High frequency sampling 

分 类 号：TN15[电子电信—物理电子学] TL81[核科学技术—核技术及应用]