Importance of Resolving the Spectral Support of Beam-plasma Instabilities in Simulations

  title={Importance of Resolving the Spectral Support of Beam-plasma Instabilities in Simulations},
  author={M. Shalaby and A. Broderick and P. Chang and C. Pfrommer and A. Lamberts and E. Puchwein},
  journal={The Astrophysical Journal},
  • M. Shalaby, A. Broderick, +3 authors E. Puchwein
  • Published 2017
  • Physics
  • The Astrophysical Journal
  • Many astrophysical plasmas are prone to beam-plasma instabilities. For relativistic and dilute beams, the spectral support of the beam-plasma instabilities is narrow, i.e., the linearly unstable modes that grow with rates comparable to the maximum growth rate occupy a narrow range of wavenumbers. This places stringent requirements on the box-sizes when simulating the evolution of the instabilities. We identify the implied lower limits on the box size imposed by the longitudinal beam plasma… CONTINUE READING
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