小丸内靶靶丸跟踪系统工作原理及相关测试

小丸内靶靶丸跟踪系统是小丸内靶装置的一套辅助测量系统,该系统用于测量靶丸在反应点的位置和时间信息,记录每个靶丸的飞行轨迹和时间,配合其他靶丸控制系统实现反应事例顶点的精确定位,精确度能达到几十μm量级。本文描述了小丸内靶靶丸跟踪系统的工作原理,即利用靶丸对光的散射收集该散射光定位靶丸所在位置,及该系统搭建前的部分测试工作,确定了该系统的最终结构,即相机与光源的夹角为135°,确定了光源为5.5mW的激光;测定了线扫描相机频率为98.000 8kHz和镜头M7528-MP最小物距为285mm,此时放大倍率为0.224。

Principle and Related Test on Pellet Tracking System of Pellet Internal Target

The pellet tracking system is an auxiliary measuring system of the pellet internal target equipment .The pellet internal target system ,which is often used in had-ronic physics experiment ,is an internal target with 4πcoverage for reaction productions detection .The pellet will interact with the circulating ion beam perpendicularly in the reaction chamber .The precise determination of the reaction vertex is very helpful for the reconstruction of the events with short lived production particles .The pellet track-ing system with other controllers can determine the position of reaction vertex very pre-cisely to an order of ten micrometers .The principle of the pellet tracking system was described in this paper ,in w hich the pellet's position is determined by using the scatter-ing light from pellet .The structure was determined based on the tests before the system was built .The angle between the laser and the camera is 135° and the laser power is 5.5 mW .The frequency of the line scan camera AVIIVA M2 CL is 98.0008 kHz .The minimum distance between the lens M 7528-MP and the object is 285 mm ,and at this position the magnification is 0.224 .