Constrained Multi-Objective Shape Optimization of Superconducting RF Cavities to Counteract Dangerous Higher Order Modes

Marija Kranjcevic, Andreas Adelmann, Peter Arbenz, Shahnam Gorgi Zadeh, Ursula Van Rienen, Schaa, Volker RW (Ed.), Makino, Kyoko (Ed.), Snopok, Pavel (Ed.), Berz, Martin (Ed.)
High current storage rings, such as the Z operating mode of the FCC-ee, require superconducting radio frequency (RF) cavities that are optimized with respect to both the fundamental mode and the dangerous higher order modes. In order to optimize the shape of the RF cavity, a constrained multi-objective optimization problem is solved using a massively parallel implementation of an evolutionary algorithm. Additionally, a frequency-fixing scheme is employed to deal with the constraint on the
more » ... ncy of the fundamental mode. Finally, the computed Pareto front approximation and an RF cavity shape with desired properties are shown.
doi:10.18429/jacow-icap2018-tupag14 fatcat:k6kdvrza4bhrrndazc5ngl22vm