北京谱仪Ⅲ(BESⅢ)是北京正负电子对撞机Ⅱ(BEPCⅡ)上的一台大型通用磁谱仪,用于τ-粲物理实验研究。主要研究了BESⅢ原始数据的离线处理;利用原始数据转换服务实现了BESⅢ原始数据的访问;同时,对原始数据转换服务进行了优化和扩展以满足高性能输入/输出和Monte Carlo模拟的需求。还完成了原始数据转换服务在BESⅢ在线系统中的重用,以及过滤原始数据的功能。
The Beijing Spectrometer Ⅲ (BESⅢ) is a general-purpose detector at Beijing Electron Positron Collider Ⅱ(BEPCⅡ) for the experimentalτ-charm physics study. It mainly studies the offline processing of BESⅢ raw data. Firstly, it introduces the implementation of raw data access by using the raw data conversion service. Then it describes optimizations of the service to improve input/output performance and to meet the requirements of Monte Carlo simulation. Finally, it presents how to reuse the service in the BESⅢ online system and the solution of raw data filtering.