高能电子成像实验平台束流发射度测试

Beam Emittance Measurement of High Energy Electron Radiography Experimental Platform

针对兰州高能电子成像实验平台加速器,设计了基于多次改变聚焦强度法的实验来测量東流发射度。采用YAG屏及CCD相机来采集束斑图像,编制了一套完整的计算软件,具有测量方便,计算快速可靠等特点,该测量为后续的高能电子成像实验提供了相关信息。测试结果表明,x方向发射度与理论计算设计接近,y方向发射度与理论计算偏差较大,有待进一步对加速器进行优化调试。

We have designed an experiment based on the‘quadruple scan method'to measure the beam emittance at the Lanzhou High Energy Electron Radiography experimental platform.Mainly using a YAG screen and a CCD camera to get beam profiles,and a GUI code is written to rcalizing the image processing and emittance calculation.With the characteristics of convenient measurement,fast and reliable calculation,this measurement provides the basis for subsequent High Energy Electron Radiography experiments.The measurement results show that the x-direction emittance is close to the theoretical calculation,and the y-direction emittance is far from the theoretical calculation.It is necessary to further optimize and commissioning the accelerator.