Collisional resonance function in discreteresonance quasilinear plasma systems
Abstract
A method is developed to analytically determine the resonance broadening function in quasilinear theory from first principles, due to either Krook or FokkerPlanck 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 growth rate and mode saturation levels for nearthreshold plasmas previously calculated from nonlinear kinetic theory. The distribution function is also calculated, which enables precise determination of the characteristic collisional resonance width.
 Publication:

Physics of Plasmas
 Pub Date:
 December 2019
 DOI:
 10.1063/1.5129260
 arXiv:
 arXiv:1906.01780
 Bibcode:
 2019PhPl...26l0701D
 Keywords:

 Physics  Plasma Physics
 EPrint:
 Physics of Plasmas 26, 120701 (2019)