强激光与粒子束2024，Vol.36Issue(3)：117-124,8.DOI:10.11884/HPLPB202436.230361
NFTHz加速器束流横向截面尺寸测量系统研制
Development of the NFTHz accelerator beam profile measurement system
摘要
Abstract
The"Composite Light Source"project of the National Synchrotron Radiation Laboratory,Terahertz Near-Field High-Flux Material Property Testing System,consists of an approximately 3-meter electron linear accelerator.To characterize the performance of the accelerator and monitor the status of the beam,it is necessary to measure the beam size.Specifically designed for the terahertz linear accelerator,a beam size measurement system based on the EPICS distributed system has been developed.A beam spot detector is taken for the conversion of the beam spot into an optical spot and a remote mirror is taken to image the optical spot onto a CCD camera for image acquisition.Subsequently,the camera-captured image data is integrated into the EPICS database using ADAravis.Due to the dark current and radiation environment,salt-and-pepper noise is present in the acquired images.Therefore,a Convolutional Neural Network(CNN)is employed to suppress the salt-and-pepper noise in the images.Finally,Gaussian fitting is applied to calculate the beam cross-sectional dimensions from the images.The experimental results indicate that the CNN can effectively eliminate salt-and-pepper noise,and the resolution of this system is 15.8 μm,which satisfies the design requirement.关键词
EPICS/ADAravis/束流截面测量/机器学习/卷积神经网络Key words
EPICS/ADAravis/beam profile measurement/machine learning/convolutional neural network分类
能源科技引用本文复制引用
朱文超,魏征宇,谢春杰,周泽然,王琳,梁钰..NFTHz加速器束流横向截面尺寸测量系统研制[J].强激光与粒子束,2024,36(3):117-124,8.基金项目
国家自然科学基金项目(51627901) （51627901）
