Orateur
Description
To meet the nanoradian-level beam stability requirements of synchrotron radiation facilities and address the limitations of fixed algorithms and low precision in conventional controllers, the Beamline Control Group of the Shanghai Synchrotron Radiation Facility has developed a high-performance optical component control system based on the integration of high-performance hardware and flexible software. The hardware platform comprises ultra-low-drift piezoelectric controllers/actuators, high-resolution analog modules (22-bit ADC, 20-bit DAC), and an Arm+DSP core. The software architecture features a real-time kernel, modular design, user-customizable algorithms, and EPICS compatibility. Applied to high-stability monochromators, double-crystal monochromators, and flexible angle adjustment mechanisms, the system effectively suppresses the slow drift of double-crystal angles with an angular stability RMS < 20 nrad, optimizing photon flux stability. For the flexible angle adjustment mechanism, the resolution is approximately 10 nrad, with an RMS < 4.5 nrad at 0.1–500 Hz. This work provides a customizable solution for nanoradian-level stability of advanced light source optical components, verifying the feasibility of hardware-software collaborative innovation in precision control. Future research will focus on multi-degree-of-freedom/multi-physics coupling control and application expansion to ultra-precision instruments.