Coupling saturation in the nonlinear theory of parametric decay instabilities

Journal Article · Mon Mar 29 04:00:00 EST 1976 · Phys. Rev. Lett., v. 36, no. 13, pp. 729-732

DOI:https://doi.org/10.1103/PhysRevLett.36.729· OSTI ID:4048575

Bezzerides, B; DuBois, D F

A new saturation mechanism for the nonlinear stage of parametric decay instabilities arises from pump-induced cross-correlations between Fourier modes. These correlations result in a renormalization - usually a reduction - of the mode coupling coefficients. Coupling saturation arises from the same order of approximation as the familiar induced-scattering nonlinearity. When applied to the 2ω_pe decay instability and the electron--ion decay instability, coupling saturation greatly reduces the turbulent wave energy compared to earlier calculations.

• Research Organization: Theoretical Division, Los Alamos Scientific Laboratory, Los Alamos, New Mexico 87545
• Sponsoring Organization: USDOE
• NSA Number: NSA-33-028755
• OSTI ID: 4048575
• Journal Information: Phys. Rev. Lett., v. 36, no. 13, pp. 729-732, Journal Name: Phys. Rev. Lett., v. 36, no. 13, pp. 729-732; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

*PLASMA MACROINSTABILITIES-- PARAMETRIC INSTABILITIES
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COUPLING
DECAY INSTABILITY
NONLINEAR PROBLEMS
PLASMA WAVES
SATURATION
TURBULENCE