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Kawaguchi, H.

Paper Title Page
THPAN045 Explicit Time Domain Boundary Element Scheme for Dispersion-free Wake Field Calculation of Long Accelerator Structures 3330
  • K. Fujita, T. Enoto, S. Tomioka
    Hokkaido University, Sapporo
  • R. Hampel, W. F.O. Muller, T. Weiland
    TEMF, Darmstadt
  • H. Kawaguchi
    Muroran Institute of Technology, Department of Electrical and Electronic Engineering, Muroran
  This paper introduces a new explicit scheme with a moving window option for wake field calculation of long accelerator structures. This scheme is based on a time domain boundary element method (TDBEM) which uses a retarded Kirchhoff boundary integral equation on interior region problems. As a corollary of this boundary integral equation, our approach allows a conformal modeling of a structure and time domain wake field simulation without numerical grid dispersion errors in all spatial directions. The implementation of a moving window technique in the framework of TDBEM is presented and it is shown that this moving window technique allows to significantly reduce memory requirement of the TDBEM scheme in the short range wake field calculation. Several numerical examples are demonstrated for the TESLA 9-cell cavity and tapered collimators. The results of the new TDBEM scheme are compared with that of finite difference codes.