Hybrid ray-FDTD moving window approach to pulse propagation
Journal of Computational Physics
SIAM Journal on Scientific Computing
Full wave propagation model based on moving window FDTD
MILCOM'03 Proceedings of the 2003 IEEE conference on Military communications - Volume II
Hi-index | 31.45 |
A finite element moving window technique is developed to simulate the propagation of electromagnetic waves induced by the transit of a charged particle beam inside large and long structures. The window moving along with the beam in the computational domain adopts high-order finite element basis functions through p refinement and/or a high-resolution mesh through h refinement so that a sufficient accuracy is attained with substantially reduced computational costs. Algorithms to transfer discretized fields from one mesh to another, which are the keys to implementing a moving window in a finite element unstructured mesh, are presented. Numerical experiments are carried out using the moving window technique to compute short-range wakefields in long accelerator structures. The results are compared with those obtained from the normal finite element time domain (FETD) method and the advantages of using the moving window technique are discussed.