Collisional resonance function in discrete-resonance quasilinear plasma systems

Duarte, V. N.; Gorelenkov, N. N.; White, R. B.; Berk, H. L.

doi:10.1063/1.5129260

Title: Collisional resonance function in discrete-resonance quasilinear plasma systems

Journal Article · 02 December 2019 · Physics of Plasmas

DOI: https://doi.org/10.1063/1.5129260 · OSTI ID:1580577

^[1];

^[1]; Berk, H. L. ^[2]

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Univ. of Texas, Austin, TX (United States)

In this paper, a method is developed to analytically determine the resonance broadening function in quasilinear theory from first principles, 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 growth rate and mode saturation levels for near-threshold plasmas previously calculated from nonlinear kinetic theory. The distribution function is also calculated, which enables precise determination of the characteristic collisional resonance width.

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Research Organization:: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 1580577

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 12 Vol. 26; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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