Renormalization-group theory of plasma microturbulence

Journal Article · Mon Aug 01 00:00:00 EDT 1994 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States)

DOI:https://doi.org/10.1103/PhysRevE.50.1444· OSTI ID:6998078

Carati, D; Chriaa, K; Balescu, R ^[1]

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1. Physique Statistique, Plasmas, et Optique Nonlineaire, Association Euratom-Etat Belge, Campus Plaine C.P. 231, B-1050 Bruxelles (Belgium)

The dynamical renormalization-group methods are applied to the gyrokinetic equation describing drift-wave turbulence in plasmas. As in both magnetohydrodynamic and neutral turbulence, small-scale fluctuations appear to act as effective dissipative processes on large-scale phenomena. A linear renormalized gyrokinetic equation is derived. No artificial forcing is introduced into the equations and all the renormalized corrections are expressed in terms of the fluctuating electric potential. The link with the quasilinear limit and the direct interaction approximation is investigated. Simple analytical expressions for the anomalous transport coefficients are derived by using the linear renormalized gyrokinetic equation. Examples show that both quasilinear and Bohm scalings can be recovered depending on the spectral amplitude of the electric potential fluctuations.

• OSTI ID: 6998078
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States), Vol. 50:2; ISSN 1063-651X
• Country of Publication: United States
• Language: English

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