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Re-normalized quasi-linear approximation of plasma turbulence. Part 1. Modification of the Weinstock weak-coupling limit

par Misguich, Jacques
Référence Journal of plasma physics, 13, 3, page (385-417)
Publication Publié, 1975

Article révisé par les pairs

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Résumé :

A re-normalized expansion is presented for the solution of the fluctuating Vlasov equation for turbulent plasmas. Its first term can be identified with the Weinstock result in the weak-coupling approximation. The use of time-ordering operators allows one to solve the Weinstock UA evolution operator explicitly. Detailed results are given for the weak-coupling approximation, presented here as a simple re-normalization of the quasi-linear theory. Results of Weinstock and Birmingham & Bornatici, concerning the frequency shift, resonance broadening and Dupree damping appear to be deeply modified by similar corrective terms. These arise from a consistent handling of expressions involving non-commuting operators. © 1975, Cambridge University Press. All rights reserved.