Detailed calibration of the PI-LCX：1300 high performance single photon counting hard x-ray CCD camera

• Published in: Chinese physics B 2017-02, Vol.26 (2), p.334-340
• Main Author: 洪伟 温贤伦 魏来 朱斌 吴玉迟 董克攻 焦春晔 伍波 何颖玲 张发强 周维民 谷渝秋
• Format: Article
• Language: English
• Subjects: CCD相机; 单光子计数; 校准; 检测效率; 激光等离子体相互作用; 硬X射线; 能量分辨率; 计算机程序
• ISSN: 1674-1056; 2058-3834
• DOI: 10.1088/1674-1056/26/2/025204

X-ray charge-coupled-device（CCD） camera working in single photon counting mode is a type of x-ray spectrometer with high-sensitivity and superior signal-to-noise performance. In this study, two single photon counting CCD cameras with the same mode（model： PI-LCX： 1300） are calibrated with quasi-monochromatic x-rays from radioactive sources and a conventional x-ray tube. The details of the CCD response to x-rays are analyzed by using a computer program of multi-pixel analyzing and event-distinguishing capability. The detection efficiency, energy resolution, fraction of multi-pixel events each as a function of x-ray energy, and consistence of two CCD cameras are obtained. The calibrated detection efficiency is consistent with the detection efficiency from Monte Carlo calculations with XOP program. When the multi-pixel event analysis is applied, the CCDs may be used to measure x-rays up to 60 ke V with good energy resolution（E /？E ≈ 100 at60 ke V）. The difference in detection efficiency between two CCD cameras is small（5.6% at 5.89 ke V）, but the difference in fraction of the single pixel event between them is much larger（25% at 8.04 ke V）. The obtained small relative error of detection efficiency（2.4% at 5.89 ke V） makes the high accurate measurement of x-ray yield possible in the laser plasma interaction studies. Based on the discrete calibration results, the calculated detection efficiency with XOP can be used for the whole range of 5 ke V–30 ke V.