3-D electromagnetic modeling of wakefields in accelerator components

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We discuss the use of 3-D finite-difference time-domain (FDTD) electromagnetic codes for modeling accelerator components. Computational modeling of cylindrically symmetric structures such as induction accelerator cells has been very successful in predicting the wake potential and wake impedances of these structures, but full 3-D modeling of complex structures has been limited due to substantial computer resources required for a full 3-D model. New massively parallel 3-D time domain electromagnetic codes now under development using conforming unstructured meshes allow a substantial increase in the geometric fidelity of the structures being modeled. Development of these new codes are discussed in context of ... continued below

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9 p.

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Poole, B.R.; Caporaso, G.J.; Ng, Wang C.; Shang, C.C. & Steich, D. September 18, 1996.

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Description

We discuss the use of 3-D finite-difference time-domain (FDTD) electromagnetic codes for modeling accelerator components. Computational modeling of cylindrically symmetric structures such as induction accelerator cells has been very successful in predicting the wake potential and wake impedances of these structures, but full 3-D modeling of complex structures has been limited due to substantial computer resources required for a full 3-D model. New massively parallel 3-D time domain electromagnetic codes now under development using conforming unstructured meshes allow a substantial increase in the geometric fidelity of the structures being modeled. Development of these new codes are discussed in context of applicability to accelerator problems. Various 3-D structures are tested with an existing cubical cell FDTD code and wake impedances compared with simple analytic models for the structures; results will be used as benchmarks for testing the new time time domain codes. Structures under consideration include a stripline beam position monitor as well as circular and elliptical apertures in circular waveguides. Excellent agreement for monopole and dipole impedances with models were found for these structures below the cutoff frequency of the beam line.

Physical Description

9 p.

Notes

INIS; OSTI as DE97050120

Source

  • CAP `96: 1996 computational accelerator physics conference, Williamsburg, VA (United States), 24-27 Sep 1996

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  • Other: DE97050120
  • Report No.: UCRL-JC--124071
  • Report No.: CONF-9609256--6
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 392716
  • Archival Resource Key: ark:/67531/metadc685010

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  • September 18, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 16, 2016, 1:28 p.m.

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Poole, B.R.; Caporaso, G.J.; Ng, Wang C.; Shang, C.C. & Steich, D. 3-D electromagnetic modeling of wakefields in accelerator components, article, September 18, 1996; California. (digital.library.unt.edu/ark:/67531/metadc685010/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.