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Description
This work presents the development and experimental validation of a control system for synchrotron X-ray beam stabilization. A laboratory-scale replica of a beamline was constructed using an analog oscilloscope to emulate beam dynamics. Electrical actuation was implemented via deflection plates, while disturbances were introduced using an electromagnet. Beam position monitoring was performed through a 2×2 photodiode matrix, replicating the functionality of X-ray Beam Position Monitors (XBPMs). System identification through steady-state and transient analysis resulted in a first-order linear dynamic model relating input voltages to beam position. A PI controller was designed based on this model, and experimental validation demonstrated the controller’s effectiveness in maintaining beam stability under position drift conditions—typical disturbances during X-ray Absorption Spectroscopy (XAS) experiments—achieving a control frequency of 1 kHz, limiting the steady-state error to below 0.2% of the total drift. The proposed approach provides a foundation for the development of high-performance control systems for synchrotron beamlines, with potential application to operational facilities.
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