The Historical Data Query And Analysis System For The HLS-Ⅱ

HLS-Ⅱ (Hefei Light Source Ⅱ) is a big facility for particle accelerator, which is composed of an electron linear accelerator, a transport line and an 800 MeV electron storage ring. A large amount of historical data is archived during the commissioning and operation of the HLS-Ⅱ. The accelerator engineers and scientists can understand the status and performance of the HLS-Ⅱ by querying and analyzing these historical data. Therefore, it has important application value to develop the data query and analysis system for the historical data of the HLS-Ⅱ.There are two archive systems for the historical data of the HLS-Ⅱ, one is the RDB Channel Archiver system based on Oracle database, the other is the Channel Archiver system based on files. These two archive systems provide backup to each other. The Historical data query and analysis system for the HLS-Ⅱ is developed based on the archive systems, it is a web application implemented by the Java web method, constructed by Spring, Struts and Hibernate, and optimized for the big data query. The Historical data query and analysis system is divided of two parts:data query module and data analysis module. The data query module can be applied to both two archive systems, it is able to retrieve, show the historical data and calculate basic statistics for the selected parameters in the given time scale. The data analysis module is only applied to the RDB Channel Archiver system, it is able to count the operation status, calculate the integrated beam current and analyze the beam cleaning status in the electron storage ring.The historical data query and analysis system for the HLS-Ⅱ has been under operation since Nov.2014. It is stable, easy to use, and provides a great convenience for the accelerator engineers and scientists to learn operation status of the HLS-Ⅱ and improve the performance of the HLS-Ⅱ.