Numerical modeling of arcs in accelerators

Jim Norem, Zeke Insepov, Thomas Proslier, Sudhakar Mahalingam, Seth Veitzer

Research output: Contribution to conferencePaperpeer-review

1 Citation (Scopus)

Abstract

We are developing a model of arcing to explain breakdown phenomena in high-gradient rf systems used for particle accelerators. This model assumes that arcs develop as a result of mechanical failure of the surface due to electric tensile stress, ionization of fragments by field emission, and the development of a small, dense plasma that interacts with the surface primarily through self sputtering and terminates as a unipolar arc capable of producing field emitters with high enhancement factors. We are modeling these mechanisms using Molecular Dynamics (mechanical failure, Coulomb explosions, self sputtering), Particle-In-Cell (PIC) codes (plasma evolution), mesoscale surface thermodynamics (surface evolution), and finite element electrostatic modeling (field enhancements). We believe this model may be more widely applicable and we are trying to constrain the physical mechanisms using data from tokamak edge plasmas.

Original languageEnglish
Pages205-207
Number of pages3
Publication statusPublished - 2011
Externally publishedYes
Event25th International Linear Accelerator Conference, LINAC 2010 - Tsukuba, Ibaraki, Japan
Duration: Sep 12 2010Sep 17 2010

Other

Other25th International Linear Accelerator Conference, LINAC 2010
Country/TerritoryJapan
CityTsukuba, Ibaraki
Period9/12/109/17/10

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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