The collisional resonance function in discrete-resonance quasilinear plasma systems
arXiv:1906.01780 · doi:10.1063/1.5129260
Abstract
A method is developed to analytically determine the resonance broadening function in quasilinear theory, due to either Krook or Fokker-Planck scattering collisions of marginally unstable plasma systems where discrete resonance instabilities are excited without any mode overlap. It is demonstrated that a quasilinear system that employs the calculated broadening functions reported here systematically recovers the nonlinear growth rate and mode saturation levels for near-threshold plasmas previously calculated from kinetic theory. The distribution function is also calculated, which enables precise determination of the characteristic collisional resonance width.
References in corpus (4)
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- Onset of nonlinear structures due to eigenmode destabilization in tokamak plasmas
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- Analysis of non-diffusive avalanche transport of energetic particles