SMuK 2023 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 1: Particle and Photon Sources
AKBP 1.6: Vortrag
Montag, 20. März 2023, 17:15–17:30, CHE/0183
Computational homogenisation of laminated yokes in finite-element models of fast-ramped orbit corrector magnets — Jan-Magnus Christmann1, Moritz von Tresckow1, •Herbert De Gersem1, Alexander Aloev2, Sajjad H. Mirza2, Sven Pfeiffer2, and Holger Schlarb2 — 1TEMF, TU Darmstadt, Germany — 2DESY, Hamburg, Germany
Fast corrector magnets need to be equipped with iron yokes to keep their inductance sufficiently low. Even iron stacks with thin laminates suffer from relevant eddy-current losses at elevated frequencies, causing Joule losses and invoking a time delay between excitation current and aperture field. Resolving the individual laminates within a finite-element model is not feasible. Instead, computational homogenisation is applied. The lamination stack is modelled as a bulk part and represented by an anisotropic and frequency-dependent surrogate material. This contribution illustrates the validity of this approach. The correction magnets planned for the fast orbit feedback system of PETRA IV at DESY serve as an example.