作　　者： ; ; ; ; ; ; ;

机构地区： 中国工程物理研究院流体物理研究所

出　　处： 《高能物理与核物理》 2005年第11期1095-1099,共5页

摘　　要： 光学渡越辐射作为高能强流电子束束流参数测量的一种方式,具有时间响应快、分辨率高等特点,可以测量电子束的束剖面、发散角、能量等多个参数;通过电子束束参数的时间分辨测量则能够了解电子束产生、运输中的问题,非常有利于加速器的研究与调试。一种具有时间分辨能力的、利用光学渡越辐射进行高能强流电子束参数测量的系统被建立起来,并应用到了18.5MeV,2.5kA,90ns的实际的电子束束参数的在线测量中,具有以10ns的时间间隔和3ns的曝光时间来获得90ns内相应的时间分辨的束发射度的变化值的能力,为加速器的研究提供了又一个强有力的测试手段。该系统具有的时间分辨能力最高到达10ns,一次可以拍摄到8幅图像,最小的曝光时间为3ns,图像分辨率为1376×1035,幅面可以达到φ80mm以上。 The technology using optical transition radiation （OTR） which is a main method for measuring the electron beam of high energy and high current has been developed for the past ten years. OTR characterized by the ultra-fast response, high resolution and capability of measuring both spatial and angular profiles of an electron beam. It also can measure the beam energy and divergence. A time-resolved measurement results of an electron beam produced by linear induction accelerator （LIA） can provide much more detail information so that many problems about the beam transmission can be known well. Such a time-resolved measurement system has been developed recently in our lab and put into operation. It provides an on-line beam diagnostic method for a 18.5MeV, 2kA, 90ns electron pulse. The beam emittance and its variation during the 90ns pulse are obtained in 10ns time interval. This system can capture 8 frame images at one time in the minimum interval period of 10ns while the exposure time is 3ns. The frame interval time is 8 level which changes from 10ns to 1280ns in power of 2 and the exposure time can change in three level of 3ns, 5ns, 10ns. The size of image is 1376×1035 and the object plane size can reach φ80mm.

关 键 词： 光学渡越辐射 束流诊断 强流加速器 分光锥 辐射测量系统 强流电子束 分辨能力 时间响应

领　　域： [核科学技术] [自动化与计算机技术] [自动化与计算机技术]