A Moving Window Technique in Parallel Finite Element Time Domain Electromagnetic Simulation

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A moving window technique for the finite element time domain (FETD) method 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 key to implementing a moving window in a finite-element unstructured mesh, are presented. Numerical ... continued below

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17 pages

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Lee, Lie-Quan; Candel, Arno; Ng, Cho; Ko, Kwok; /SLAC & , June 7, 2010.

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A moving window technique for the finite element time domain (FETD) method 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 key 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 FETD method and the advantages of using the moving window technique are discussed.

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17 pages

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  • Journal Name: Journal of Computational Physics; Journal Volume: 229; Journal Issue: 24

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  • Report No.: SLAC-PUB-14099
  • Grant Number: AC02-76SF00515
  • DOI: 10.1016/j.jcp.2010.08.037 | External Link
  • Office of Scientific & Technical Information Report Number: 981693
  • Archival Resource Key: ark:/67531/metadc1013022

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  • June 7, 2010

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  • Oct. 14, 2017, 8:36 a.m.

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  • Nov. 3, 2017, 1:28 p.m.

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Lee, Lie-Quan; Candel, Arno; Ng, Cho; Ko, Kwok; /SLAC & ,. A Moving Window Technique in Parallel Finite Element Time Domain Electromagnetic Simulation, article, June 7, 2010; [California]. (digital.library.unt.edu/ark:/67531/metadc1013022/: accessed October 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.