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IPM
30
YEARS OLD

“School of Particles And Accelerator”

Paper   IPM / Particles And Accelerator / 11254
   School of Particles and Accelerator
  Title: The Challenge of Monte Carlo Method in Two Sided Multipactor
  Author(s):
1 . Maryam Mostajeran
2 . Mohammad Lamehi Rachti
  Status: In Proceedings
  Proceeding: SRF09 - TUPPO058, P.365, Berlin, Germany, 2009
  Year: 2009
  Supported by: IPM
  Abstract:
Superconducting RF cavities have been used in modern accelerators. SRF cavities have the limitation on maximum RF voltage and maximum delivered RF power. The major limitation comes from Multipacting in the cavity andwaveguide. To design a Multipacting-free RF structure, numerical tracing calculations are required. Here, Monte Carlo method within a plane parallel model is employed using a wide range of parameters. For more accurate predictions,a long history of electron trajectories between two parallel plats is investigated. Simulations give us fast convergence when we are far from the avalanche threshold. However it is very difficult to get such convergence when we are close to the avalanche threshold. In the present work, we demonstrate how we can cope with this difficulty.

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