Speaker
Dr
Vinicius Duarte
(Princeton Plasma Physics Laboratory)
Description
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.
| Country or International Organization | United States |
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Primary authors
Dr
Vinicius Duarte
(Princeton Plasma Physics Laboratory)
Nikolai Gorelenkov
(Princeton Plasma Physics Laboratory)
Dr
Roscoe B. White
(Princeton Plasma Physics Laboratory)
Herbert Berk
(University of Texas at Austin)
