Author: Cheatham, D.M.
Paper Title Page
Particle-in-Cell Simulations of Plasma Production in C100 SRF Cavity for in Situ Cleaning  
  • J.B. Leddy, J.R. Cary, D.M. Cheatham, D.N. Smithe
    Tech-X, Boulder, Colorado, USA
  Particle-in-cell simulations provide insight into the parameters of the plasma that can be used to remove impurities from superconducting radio frequency (SRF) cavity walls in situ. Surface contamination of the vessel walls can severely impact the achievable field strength. Therefore, efficient and effective cleaning of the cavity surfaces is necessary to maintain optimal acceleration gradients. In situ cleaning techniques involve generating plasma discharges that remove the impurities through chemical and mechanical processes*. The benefits of these techniques are to reduce the field emission and increase stability for devices with complex geometries without the need for disassembly. Theoretical methods have emerged to increase the effectiveness of the plasma discharge cleaning; however, there is an inherent risk when attempting new methods experimentally. We have performed particle-in-cell simulations of the C100 cavity including ionization, recombination, and scattering interactions to explore the parameters of the plasma generated via EM signal. These properties provide an insight into the plasma generation and its predicted effectiveness at removing impurities.  
slides icon Slides THAHC6 [14.656 MB]  
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