摘要
加速器束流发射度描述了束流的径向性能,是束流品质的一个重要参数。本文描述了双缝扫描法发射度测量的基本原理和方法,基于PXI系统及LabVIEW软件设计了一套发射度控制及测量方法,以实现束流发射度的实时测量。结合中国散裂中子源工程束晕研究的需要,利用步进电机控制双缝完成位置缝每运动一个步长,角度缝要运动一个束流径向距离的扫描过程;且角度缝每动一个步长,数据采集系统读一次束流信号和一次双缝位置信号,最后将所得数据进行处理。测试及处理方法满足工程需要,在中国散裂中子源工程低能传输段及中能传输段得以验证。
Accelerator beam emittance is an important parameter of beam quality,and it describes the beam＇s radial performance.The paper describes the double-slit scan measurement principle and method of the accelerator beam emittance,and designs a control and measurement method of double-slit scan based on PXI system and LabVIEW software for achieving real-time measurement of emittance.Combined with the research need of China Spallation Neutron Source project beam halo,using stepper motor control double-slit scan：with every movement completion by one step of position slit,the angle slit exercises a radial distance;with moving one step of the angle slit,the DAQ work one time for beam signal and the two slits＇ position information,and the resulting data is processed finally.The method meets to project＇needs,and is verified in Median Energy Beam Transform and Low Energy Beam Transform of China Spallation Neutron Source project.
出处
《国外电子测量技术》
2016年第4期21-27,共7页
Foreign Electronic Measurement Technology
