Data acquisition and online preprocessing system for the Femtosecond X-ray Scattering endstation at PAL-XFEL

Abstract We present a Data Acquisition (DAQ) system architecture specifically designed for time-resolved X-ray scattering and spectroscopy experiments at the Femtosecond X-ray Scattering (FXS) endstation at the Pohang Accelerator Laboratory X-ray Free Electron Laser (PAL-XFEL). This system addresses the critical challenges associated with high data production rates, alignment of data from various devices, the demands for efficient data handling, and scalability of entire system. To enable rapid preliminary analysis and data visualization, we have implemented a real-time analysis approach prior to data saving. In addition, the system provides user-friendly data access and analysis capabilities, ensuring efficient exploration and utilization of the collected data.