Orateur
Description
To support beam commissioning and operation at the High Energy Photon Source (HEPS), China’s first fourth-generation high-energy synchrotron light source, an EPICS-integrated high level application (HLA) framework has been developed. The framework, named Pyapas, is implemented in Python and serves as the unified platform for HLA development at HEPS.
Pyapas is tightly integrated with EPICS, providing standardized access to accelerator devices and beam diagnostics through EPICS Process Variables. Based on pyapas, various HLAs have been developed for orbit correction, optics measurement, and machine modeling. In addition, EPICS-integrated feedback systems for beam stabilization, as well as insertion device interlock and control systems, have been implemented to support stable and safe machine operation.
Since 2023, these HLAs have been extensively applied during the commissioning of the Linac, booster, and storage ring at HEPS, contributing to major commissioning milestones. By the end of 2025, HEPS successfully completed the technical commissioning phase and achieved all acceptance criteria.