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000632942 0247_ $$2doi$$a10.18429/JACoW-IPAC25-THPS040
000632942 037__ $$aPUBDB-2025-02270
000632942 041__ $$aEnglish
000632942 1001_ $$0P:(DE-H253)PIP1005825$$aGrecki, Mariusz$$b0$$eCorresponding author
000632942 1112_ $$a16th International Particle Accelerator Conference$$cTaipei$$d2025-06-01 - 2025-06-06$$wTaiwan
000632942 245__ $$aOptimization of Piezo Operation for Superconducting TESLA Cavities at EuXFEL
000632942 260__ $$c2025
000632942 300__ $$a3001-3003
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000632942 500__ $$aAt the time of this request, the publication was not yet available on doi.org (10.18429/JACoW-IPAC25-THPS040).
000632942 520__ $$aSuperconducting cavities with high Q-factor require precise tuning to match the RF frequency, ensuring stable electromagnetic fields and minimizing RF power consumption. At the XFEL accelerator, TESLA cavities are tuned using slow tuners (step motors) for coarse adjustments and fast tuners (piezoelectric actuators) for fine-tuning and compensating disturbances such as Lorentz Force Detuning (LFD) and microphonics*. Critical to this system, Piezo actuators require high-voltage (up to 100V) and high-current (up to 1A) driving signals for effective LFD compensation. However, they are vulnerable to overvoltage, overcurrent, and overheating**, and their protection is crucial since replacing damaged piezo in fully assembled modules is unfeasible. Additionally, piezo induced vibrations can affect the machine's stability. Optimizing piezo excitation—by reducing voltage, current, and current slope while ensuring effective LFD compensation—improves both reliability and machine stability. This paper explores the optimization of piezo excitation at XFEL, detailing methods and results applicable to other facilities with superconducting cavities.
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000632942 693__ $$0EXP:(DE-H253)XFEL-Exp-20150101$$1EXP:(DE-H253)XFEL-20150101$$5EXP:(DE-H253)XFEL-Exp-20150101$$aXFEL$$eExperiments at XFEL$$x0
000632942 7001_ $$0P:(DE-H253)PIP1014945$$aBranlard, Julien$$b1
000632942 7001_ $$0P:(DE-H253)PIP1096993$$aDiomede, Marco$$b2
000632942 7001_ $$0P:(DE-H253)PIP1005968$$aSchmidt, Christian$$b3
000632942 7001_ $$0P:(DE-H253)PIP1106369$$aHerrmann, Max$$b4
000632942 773__ $$a10.18429/JACoW-IPAC25-THPS040
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