LHAASO原型系统数据获取软件

Data Acquisition Ssoftware of LHAASO Prototype System

介绍了一个基于VME/PowerPC控制器和嵌入式Linux操作系统的小型读出软件,包括运行于PowerPC控制器上的前端软件、运行于PC上的后端软件以及在线直方图软件3部分,实现了VME插件的数据读出、存储以及在线直方图等基本功能。在设计中,利用模块动态加载和XML描述数据格式等技术,独立于具体电子学、数据格式相关的模块,使该软件可以方便地移植到其它类似数据获取系统中。该软件已应用于大型高海拔空气簇射观测站(LHAASO)宇宙线实验的部分原型系统。

This paper introduces the design and implementation of the data acquisition software based on VME/ PowerPC and Embedded Linux for small - scale systems. The software consists of three parts： the front - end readout program running on PowerPC, the back - end part on PC, and the online histogram software. The sys- tem implemented the basic function of VME electronic module readout, data transfer and storage. The software also uses the technology of dynamically loaded modules and XML based data format description to separate mod- ules that depend on specific electronics and data format. The design makes the software easy to be ported to oth- er DAQ systems. This software is currently applied to the prototype of LHAASO - KM2A and LHAASO - WC- DA cosmic ray experiments successfully.