1–6 Jun 2025
Taipei International Convention Center (TICC)
Asia/Taipei timezone

The LLRF related superconducting elliptical cavities characterization for ESS project

THPS046
5 Jun 2025, 15:30
2h
Exhibiton Hall A _Salmon (TWTC)

Exhibiton Hall A _Salmon

TWTC

Poster Presentation MC6.T27 Low Level RF Thursday Poster Session

Speaker

Wojciech Cichalewski (Lodz University of Technology)

Description

The installation phase of the European Spallation Source (ESS) linear accelerator is nearly complete. As with other superconducting linacs operating in pulse mode, LLRF systems play a crucial role in controlling accelerating beam parameters.
Modern LLRF systems go beyond providing fast and reliable feedback for RF signal regulation; they also ensure precise, dynamic cavity tuning. Additionally, they enhance machine availability by monitoring various signals to identify potential issues and implementing fast and slow algorithms to optimize cavity performance within safety limits, tailored to specific accelerator conditions.
Preparation for these tasks begins during cryomodule and cavity testing, prior to tunnel installation. Key parameters such as Lorentz force detuning coefficients, piezotuner range and polarity, main mechanical cavity modes, Pi-mode frequencies, slow tuner sensitivity, and backlash must be accurately determined to enable peak LLRF performance.
This paper outlines the development, implementation, and application of software tools designed to determine these parameters for cavities tested at ESS Test Stand 2 (TS2) and those installed in the accelerator tunnel.

Region represented Europe
Paper preparation format LaTeX

Author

Wojciech Cichalewski (Lodz University of Technology)

Co-authors

Cecilia Maiano (European Spallation Source) Grzegorz Jablonski (Lodz University of Technology) Kacper Klys (Lodz University of Technology) Paolo Pierini (European Spallation Source) Wojciech Tylman (Lodz University of Technology)

Presentation materials

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