ScatteredField Time Domain Boundary Element Method and Its Application to Transient Electromagnetic Field Simulation in Particle Accelerator Physics

 FUJITA Kazuhiro
 the Division of Quantum Science and Engineering, Graduate School of Engineering, Hokkaido University

 KAWAGUCHI Hideki
 the Department of Electrical and Electronic Engineering, Muroran Institute of Technology

 NISHIYAMA Shusuke
 the Division of Quantum Science and Engineering, Graduate School of Engineering, Hokkaido University

 TOMIOKA Satoshi
 the Division of Quantum Science and Engineering, Graduate School of Engineering, Hokkaido University

 ENOTO Takeaki
 the Division of Quantum Science and Engineering, Graduate School of Engineering, Hokkaido University

 ZAGORODNOV Igor
 DESY

 WEILAND Thomas
 Technishe Universitat Darmstadt
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Author(s)

 FUJITA Kazuhiro
 the Division of Quantum Science and Engineering, Graduate School of Engineering, Hokkaido University

 KAWAGUCHI Hideki
 the Department of Electrical and Electronic Engineering, Muroran Institute of Technology

 NISHIYAMA Shusuke
 the Division of Quantum Science and Engineering, Graduate School of Engineering, Hokkaido University

 TOMIOKA Satoshi
 the Division of Quantum Science and Engineering, Graduate School of Engineering, Hokkaido University

 ENOTO Takeaki
 the Division of Quantum Science and Engineering, Graduate School of Engineering, Hokkaido University

 ZAGORODNOV Igor
 DESY

 WEILAND Thomas
 Technishe Universitat Darmstadt
Abstract
Authors have been working in particle accelerator wake field analysis by using the Time Domain Boundary Element Method (TDBEM). A stable TDBEM scheme was presented and good agreements with conventional wake field analysis of the FDTD method were obtained. On the other hand, the TDBEM scheme still contains difficulty of initial value setting on interior region problems for infinitely long accelerator beam pipe. To avoid this initial value setting, we adopted a numerical model of beam pipes with finite length and wall thickness on open scattering problems. But the use of such finite beam pipe models causes another problem of unwanted scattering fields at the beam pipe edge, and leads to the involvement of interior resonant solutions. This paper presents a modified TDBEM scheme, Scatteredfield Time Domain Boundary Element Method (STDBEM) to treat the infinitely long beam pipe on interior region problems. It is shown that the STDBEM is able to avoid the excitation of the edge scattering fields and the involvement of numerical instabilities caused by interior resonance, which occur in the conventional TDBEM.
Journal

 IEICE Trans. Electron., C

IEICE Trans. Electron., C 90(2), 265274, 20070201
The Institute of Electronics, Information and Communication Engineers
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 Largescale Parallel Computation of Particle Accelerator Wake Fields based on Time Domain Boundary Element Method with Moving Window Technique [in Japanese]

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