基于SciCat的合肥光源实验数据管理系统开发

Development of experimental data management system for HLS-Ⅱ based on SciCat

合肥光源(Hefei Light Source,HLS-Ⅱ)是以真空紫外和软X射线为主的专用同步辐射光源,用户的实验效率与数据处理效率是其运行的核心指标,因此设计并开发了基于元数据目录框架SciCat的合肥光源实验数据管理系统,以有效提高用户的实验效率和数据处理效率。通过设计开发数据采集服务、元数据系统、文件存储系统与数据分析平台,以及接入现有的用户服务系统,实现涵盖用户认证、课题申请、专家审批、机时分配、数据采集、数据存储、数据分析、数据发布等实验及数据全生命周期的统一管理。该系统已在合肥光源的软X射线成像实验站进行了部署和功能测试,达到了设计要求。

[Background] Hefei Light Source(HLS-Ⅱ) is a dedicated synchrotron radiation source with featured the characteristics spectrum in vacuum ultraviolet and soft X-rays regions. The user’s experiment efficiency and data processing efficiency are the principal indicators of HLS-Ⅱ operation. [Purpose] This study aims to develop an experimental data management system based on SciCat to improve the user’s experimental and data processing efficiency. [Methods] As the core component of HLS-Ⅱ experimental data management system, the metadata system was designed and developed within the framework of SciCat, an open source metadata catalog framework used to realize the unified management of the whole life cycle of experimental data of large scientific devices. Data acquisition service, metadata system, file storage system and data analysis platform were integrated into SciCat, and the hierarchical data format 5(HDF5) was adopted as the standard experimental data format. Interface between existing user service systems and SciCat was implemented to achieve the management of the whole experiment and experimental data lifecycle, including user authentication, proposal application, expert approval, machine time schedule, data acquisition, data storage, data analysis and data publication. [Results & Conclusions] The system has been deployed and functionally tested at the soft X-ray microscopy experimental station of HLS-Ⅱ, satisfying all design requirements.