Data from: High-power test of normal conducting cavities with real-time resonant frequency tracking

Normal-conducting RF cavities suffer from thermal detuning during high-power operation, traditionally requiring manual frequency adjustments or mechanical tuning. This work presents a digital low-level RF system that autonomously tracks and compensates for resonant frequency shifts using an embedded phase-locked loop and real-time spectrum analysis. The approach maintains reflected power below 8.5% under detuning exceeding 200 kHz, offering a compact, fully electronic alternative to conventional methods.