北京谱仪Ⅱ顶点探测器径迹重建软件的研究

Research on the Software of Track Reconstruction in Vertex Chamber of BESⅡ

解决了北京谱仪Ⅱ顶点探测器径迹重建软件系统———VCJULI从HP Unix平台到PC Linux平台移植中“字典存放”和精度处理的问题 ,从而使两平台上的候选径迹差别从 74 %降至 0 .0 2 % ;径迹参数中一些量的差别从 5 %下降至 0 .5 %左右 .

The software of track reconstruction of the vertex chamber of BESⅡ-VCJULI was studied when it was transplanted from the HP-Unix platform to PC-Linux. The problems of distinct dictionary storage and precision treatment in these two different platforms were found and settled in the modified software. Then the obvious differences of the candidate track number in an event and some track parameters caused by them were reduced from 74% to 0.02% and from 5% to 0.5%, respectively. As a result, the quality of the track finding was greatly improved and the CPU time saved.