Fluorescent-target imaging and real-time beam diagnostics at the High Energy Photon Source

Fourth-generation synchrotron radiation sources based on diffraction-limited storage rings impose stringent requirements on beamline alignment precision, diagnostic reliability, and real-time monitoring under high-brightness operating conditions. To address these requirements, an integrated fluorescent-target imaging and real-time beam diagnostic platform has been developed at the High Energy Photon Source (HEPS). The system incorporates a radiation-tolerant and ultra-high-vacuum-compatible mechanical assembly with diamond and YAG:Ce scintillators for different heat-load conditions. A distributed multi-camera architecture implemented within the Experimental Physics and Industrial Control System (EPICS) areaDetector framework enables synchronized multi-angle monitoring of beam profiles. Key beam parameters are extracted through online image processing and published as EPICS process variables for control-system integration. To support high-throughput diagnostic data handling, the platform further integrates the Mamba Data Worker framework, enabling coordinated multi-target acquisition, HDF5 storage, and automated metadata ingestion into a dedicated HEPS beamline alignment database. Representative deployment demonstrated stable synchronized operation of 13 cameras, with online analysis completed in less than 20 ms and end-to-end latency below 50 ms. These results establish a practical and scalable framework for beamline diagnostics, alignment support, and data-driven optimization at HEPS.