空间X射线CCD驱动和读出电路设计及性能测试  

Design and calibration of space X-ray CCD driver and processing circuit

作　　者：彭吉龙[1] PENG Jilong(Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China)

机构地区：[1]北京卫星环境工程研究所,北京100094

出　　处：《量子电子学报》2019年第2期231-237,共7页Chinese Journal of Quantum Electronics

基　　金：国家重点研发计划;2016YFB0501300;2016YFB0501304~~

摘　　要：CCD的读出噪声等性能影响卫星X射线探测载荷的数据质量。空间应用的X射线CCD结构不同于普通CCD,其结构影响它的性能.以国外卫星广泛应用的E2V航天级CCD为例,分析了其X射线敏感CCD的内部结构,介绍了使用FPGA和驱动芯片满足时序和电平要求的驱动电路的方法,设计了一种可实现滤波功能、同时增益连续可调的CCD信号处理电路实现对CCD信号的放大和滤波,给出了利用Fe^(55)放射源配合驱动电路测试X射线CCD增益和读出噪声的方法,最终测得CCD和配套电路的增益为5.1 e^-/DN,读出噪声为37 e^-。The performance of CCD, such as readout noise, determines the final data quality of satellite X-ray detection payload. Commercial CCD sensor cannot be applied in space, neither in X-ray detection.The structure of an X-ray sensing CCD was explained, taking E2V space qualified product for example.Drive circuit met the time and voltage demand was designed with FPGA and an integrated drive circuit.CCD signal was amplified and filtered by a gain adjustable CCD signal process circuit. The calibration methods of gain and readout noise using Fe55 radioactive sources are also described. The measured gain of CCD and its support circuit is 5.1 e^-/DN, and the readout noise is 37 e^-.

关 键 词：X射线光学 CCD性能测试 驱动和读取电路 增益 读出噪声 

分 类 号：O434[机械工程—光学工程]