Berlin 2024 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 12: AKBP Poster Session
AKBP 12.8: Poster
Donnerstag, 21. März 2024, 11:00–14:00, Poster A
Multi-physics simulation of Quadrupole Resonators under geometric uncertainties — •Piotr Putek1, Gowrishankar T. Hallilingaiah2, Marc Wenskat3, Simon B. Adrian1, and Ursula van Rienen1 — 1Universität Rostock, Rostock, Germany — 2HZDR, Dresden, Germany — 3Universität Hamburg, Hamburg, Germany
Exploring the fundamental properties of materials, including niobium, NbTiN, multilayers or Nb3Sn, in high-precision surface resistance measurements is highly relevant to superconducting radio-frequency (RF) technology. Typically, the calorimetric measurement is carried out with a quadrupole resonator (QPR) to precisely characterize the RF properties of superconducting samples. Still, one of the main challenges in the QPR design and operations is to mitigate the influence of microphonics and Lorentz force (LF) detuning, on the one hand, and the RF losses on the adapter flange with the fabrication tolerances, on the other hand, into QPR functioning. For this reason, a multi-physics problem with random input parameters is addressed to study a significant measurement bias of the surface resistance, observed mainly for the third operating mode of the given QPR. Finally, the preliminary optimization results and their implication for the operational conditions of the QPR are discussed.
Keywords: Lorentz force (LF) detuning; electro-stress-heat (E-S-H) coupled problem; multiphysics and multiobjective shape optimization; quadrupole resonator; uncertainty quantification