% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@INPROCEEDINGS{Grecki:632942,
      author       = {Grecki, Mariusz and Branlard, Julien and Diomede, Marco and
                      Schmidt, Christian and Herrmann, Max},
      title        = {{O}ptimization of {P}iezo {O}peration for {S}uperconducting
                      {TESLA} {C}avities at {E}u{XFEL}},
      reportid     = {PUBDB-2025-02270},
      pages        = {3001-3003},
      year         = {2025},
      note         = {At the time of this request, the publication was not yet
                      available on doi.org (10.18429/JACoW-IPAC25-THPS040).},
      abstract     = {Superconducting 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.},
      month         = {Jun},
      date          = {2025-06-01},
      organization  = {16th International Particle
                       Accelerator Conference, Taipei
                       (Taiwan), 1 Jun 2025 - 6 Jun 2025},
      cin          = {MSK},
      cid          = {I:(DE-H253)MSK-20120731},
      pnm          = {621 - Accelerator Research and Development (POF4-621) /
                      iSAS - Innovate for Sustainable Accelerating Systems
                      (101131435)},
      pid          = {G:(DE-HGF)POF4-621 / G:(EU-Grant)101131435},
      experiment   = {EXP:(DE-H253)XFEL-Exp-20150101},
      typ          = {PUB:(DE-HGF)8},
      doi          = {10.18429/JACoW-IPAC25-THPS040},
      url          = {https://bib-pubdb1.desy.de/record/632942},
}