Speaker
Description
The electromagnetic simulation of large accelerator structures, such as RF cavity chains, is computationally demanding due to the high number of degrees of freedom required by the finite element methods (FEM). This work presents a framework that combines Model-Order Reduction (MOR) with state-space concatenation (SSC) within the NGSolve finite element environment. Individual cavity segments are discretised using high-order FEM, reduced to compact state-space models, and coupled through continuity conditions at shared interfaces to construct larger accelerator assemblies at significantly lower computational cost. A 2-cavity elliptical cavity chain is used as a test example to demonstrate reductions of several orders of magnitude in system size while maintaining excellent agreement with reference simulations from CST Studio Suite.