• M. Min, P.F. Fischer
  ANL, Argonne

We developed a moving window algorithm for the SEDG time-domain code, NekCEM, for wake field calculations. NekCEM is a highly efficient and spectrally accurate electromagnetic solver using the spectral element discontinuous Galerkin (SEDG) method based on body-fitted spectral element hexahedral meshes. When the domain of interest is around a moving bunch within a certain distance, one does not need to carry out full domain simulations. Moving window approach has been a natural consideration in such circumstance to have significant reduction in computational cost for the conventional low-order methods such as FDTD method. However, there have not been studies on the high-order methods, especially the SEDG method, based on the moving window approach. We implemented 3D moving window option for wake field calculations on various conducting cavities including the 9-cell TESLA cavity. We will demonstrate the performance of the SEDG simulations on moving window meshes.