5 papers
Constrained multi-objective shape optimization of superconducting RF cavities considering robustness against geometric perturbations
Marija Kranjcevic, Shahnam Gorgi Zadeh, Andreas Adelmann +2
High current storage rings, such as the Z-pole operating mode of the FCC-ee, require accelerating cavities that are optimized with respect to both the fundamental mode and the high…
Solving large-scale interior eigenvalue problems to investigate the vibrational properties of the boson peak regime in amorphous materials
Giuseppe Accaputo, Peter M. Derlet, Peter Arbenz
Amorphous solids, like metallic glasses, exhibit an excess of low frequency vibrational states reflecting the break-up of sound due to the strong structural disorder inherent to th…
Multi-objective shape optimization of radio frequency cavities using an evolutionary algorithm
Marija Kranjcevic, Andreas Adelmann, Peter Arbenz +2
Radio frequency (RF) cavities are commonly used to accelerate charged particle beams. The shape of the RF cavity determines the resonant electromagnetic fields and frequencies, whi…
A Homotopy Method for Large-Scale Multi-Objective Optimization
Andreas Adelmann, Peter Arbenz, Andrew Foster +1
A homotopy method for multi-objective optimization that produces uniformly sampled Pareto fronts by construction is presented. While the algorithm is general, of particular interes…
A novel adaptive time stepping variant of the Boris-Buneman integrator for the simulation of particle accelerators with space charge
Matthias Toggweiler, Andreas Adelmann, Peter Arbenz +1
We show that adaptive time stepping in particle accelerator simulation is an enhancement for certain problems. The new algorithm has been implemented in the OPAL (Object Oriented P…