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={Mohamad Shalaby and Avery E. Broderick and Philip Chang and Christoph Pfrommer and Astrid Lamberts and Ewald Puchwein},
  journal={arXiv: High Energy Astrophysical Phenomena},
Many astrophysical plasmas are prone to beam-plasma instabilities. For relativistic and dilute beams, the {\it 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 wave numbers. 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… Expand

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