pnCCD的实时X射线成像数据采集系统  

Real-time X-ray imaging data acquisition system for pnCCD

作　　者：霍嘉[1] 赵晓帆[1] 崔苇苇[1] 王于仨[1] 王昊[1] 陈勇[1] HUO Jia;ZHAO Xiaofan;CUI Weiwei;WANG Yusa;WANG Hao;CHEN Yong(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院高能物理研究所,北京100049

出　　处：《光学精密工程》2024年第21期3166-3173,共8页Optics and Precision Engineering

基　　金：深空基准建设装置(No.42327802);中国科学院空间科学战略先导科技专项(No.XDA15310103)。

摘　　要：根据pnCCD的工作特点,采用多线程处理和多帧图像叠合技术,研制了基于pnCCD的实时X射线成像数据采集系统。为了满足高速数据实时采集与缓存的需求,硬件采用DDR3存储器接收缓存探测器机箱的科学数据。上位机软件采用LabVIEW的列队操作函数实现了数据采集、存储、多帧叠合成像的多线程处理,并设计了多模式下的实时图像处理模块。测试结果表明,该数据采集系统满足pnCCD各工作模式下的数据采集,实时的图像处理快速呈现了聚焦相机成像的位置信息,加快完成在X射线标定装置中聚焦相机对轴对焦等实验过程。数据采集系统通信稳定可靠,具有很好的灵活性和可移植性。A real-time imaging data acquisition(DAQ)system for pn-junction Charge-Coupled Devices(pnCCD)was developed,incorporating multi-thread processing and multi-frame image superposition techniques to address the specific operational characteristics of pnCCDs.To fulfill the high-speed DAQ requirements for real-time data acquisition and caching,DDR3 memory was employed to receive scientific data from the detector box.The host computer utilized the queue operations functionality of LabVIEW to implement multi-threaded processing for data acquisition,storage,and image superposition.Additionally,real-time image processing modules with multiple operational modes were designed.Experimental results demonstrated that the DAQ system effectively met the requirements across various pnCCD operational modes.Real-time image processing enabled rapid determination of the focusing camera′s imaging position,facilitating efficient completion of key experimental procedures,such as focus adjustment and positive axis determination,within the X-ray calibration facility.The system exhibited stable and reliable communication,showcasing exceptional flexibility and portability.

关 键 词：X射线成像 pn结电荷耦合器件(pnCCD) 数据采集 LABVIEW 

分 类 号：TN386.5[电子电信—物理电子学] TP274.2[自动化与计算机技术—检测技术与自动化装置]