Eichler, AnnikaAnnikaEichlerBranlard, JulienJulienBranlardTimm, JanJanTimm2024-01-042024-01-042023-01-04Physical Review Accelerators and Beams 26 (1): 012801 (2023-01-04)https://hdl.handle.net/11420/44921A novel approach to detect anomalies in superconducting radio-frequency (rf) cavities is presented, based on the parity space method with the goal to detect quenches and distinguish them from other anomalies. The model-based parity space method relies on analytical redundancy and generates a residual signal computed from measurable rf waveforms. The residual is a sensitive indicator of deviation from the model and provides different signatures for different types of anomalies. This new method not only helps with detecting faults but also provides a catalog of unique signatures, based on the detected fault. The method was experimentally verified at the European X-ray Free Electron Laser (EuXFEL). Various types of anomalies incorrectly detected as quenches by the current quench detection system are analyzed using this new approach.en2469-988820231American Physical Societyhttps://creativecommons.org/licenses/by/4.0/PhysicsJournal Articlehttps://doi.org/10.15480/882.1397710.1103/PhysRevAccelBeams.26.01280110.15480/882.139772202.02051Journal Article