合肥光源飞扫控制系统研制  

Development of on-the-fly mode control system for Hefei Light Source

作　　者：张天哲 孔安博 陈凯 陈留国 刘功发[1] ZHANG Tianzhe;KONG Anbo;CHEN Kai;CHEN Liuguo;LIU Gongfa(National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230029,China)

机构地区：[1]中国科学技术大学国家同步辐射实验室,合肥230029

出　　处：《核技术》2024年第2期31-40,共10页Nuclear Techniques

基　　金：中国科学院人才支撑体系专项(No.KY2310000044)资助。

摘　　要：合肥光源实验站现在的扫描实验全部是基于步进扫描模式的。这种步进模式下由于运动机构存在一定的死区时间,实验耗时长,效率低。为了提高实验效率,设计了一种基于硬件触发的飞扫控制系统,可以实现实验过程的快速连续扫描。该飞扫控制系统包括同步信号采集模块、同步运动控制模块以及软件控制模块,使用EPICS(Experimental Physics and Industrial Control System)架构实现设备控制,并基于Bluesky完成实验流程控制以及数据采集。随后在合肥光源的软X射线磁性圆二色实验站上进行了飞扫控制系统的部署和测试。测试结果表明,在满足采谱性能指标的前提下,该飞扫控制系统可将单次采谱时间从几十分钟量级降低至分钟量级,显著提高了实验效率和用户体验。[Background]When conducting experiments at a synchrotron radiation facility,it is necessary to scan the position of the sample or the beam energy within a certain range.The scanning modes are categorized as step scanning and on-the-fly.In the step-scanning mode,there is a significant amount of dead time in the motion mechanism,which leads to long data acquisition times and low experimental efficiency.By contrast,the on-the-fly mode allows for continuous motion while triggering the detectors and sensors,avoiding the dead time of the motion mechanism and greatly improving the efficiency of the experiments.[Purpose]This study aims to propose and implement a hardware-triggered on-the-fly system to achieve rapid and continuous scanning during experimental processes for Hefei light source(HLS).[Methods]The proposed on-the-fly system mainly consisted of a synchronous signal acquisition module,a synchronous motion control module,and a software control module.The design of the hardware synchronous trigger module in the synchronous signal acquisition module was based on the field-programmable gate array(FPGA)development board Zynq7020.The encoder signals were decoded into position signals and used to trigger other devices based on position or time.This made it the central component for the on-the-fly mode.The design of the synchronous motion control module was based on a highly synchronous EtherCAT bus.The motion controller supported multi-axis coordination and programmable trajectory motion to meet the requirements of different experiments.The software control module utilized the experimental physics and industrial control system(EPICS)architecture for device control,and experiment flow control and data acquisition were implemented using Bluesky platform.Finally,the proposed on-the-fly system has been deployed and tested at the Soft X-ray Magnetic Circular Dichroism(XMCD)experimental station of HLS.[Results]The experimental results demonstrate that the on-the-fly mode system not only meets the spectral performance require

关 键 词：飞扫 FPGA Bluesky EPICS 

分 类 号：TL503.6[核科学技术—核技术及应用]