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On the Rayleigh–Kuo criterion for the tertiary instability of zonal flows

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.5038859· OSTI ID:1467162
 [1];  [2];  [1]
  1. Princeton Univ., NJ (United States). Dept. of Astrophysical Sciences; Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  2. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
This study reports the stability conditions for intense zonal flows (ZFs) and the growth rate γTI of the corresponding “tertiary” instability (TI) within the generalized Hasegawa–Mima plasma model. The analytical calculation extends and revises Kuo's analysis of the mathematically similar barotropic vorticity equation for incompressible neutral fluids on a rotating sphere [H.-L. Kuo, J. Meteor. 6, 105 (1949)]; then, the results are applied to the plasma case. An error in Kuo's original result is pointed out. An explicit analytical formula for γTI is derived and compared with numerical calculations. It is shown that, within the generalized Hasegawa–Mima model, a sinusoidal ZF is TI-unstable if and only if it satisfies the Rayleigh–Kuo criterion (known from geophysics) and that the ZF wave number exceeds the inverse ion sound radius. For non-sinusoidal ZFs, the results are qualitatively similar. As a corollary, there is no TI in the geometrical-optics limit, i.e., when the perturbation wavelength is small compared to the ZF scale. Finally, this also means that the traditional wave kinetic equation, which is derived under the geometrical-optics assumption, cannot adequately describe the ZF stability.
Research Organization:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-09CH11466
OSTI ID:
1467162
Alternate ID(s):
OSTI ID: 1466870
Journal Information:
Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 25; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (8)

Zonal Jet Creation from Secondary Instability of Drift Waves for Plasma Edge Turbulence journal November 2019
Linking the two-field dynamics of plasma edge turbulence with the one-field balanced model through systematic unstable forcing at low resistivity journal May 2019
On the effects of nonuniform zonal flow in the resistive-drift plasma journal January 2019
Formation of solitary zonal structures via the modulational instability of drift waves journal May 2019
Reduction of edge plasma turbulence via cross-phase decrease by zonal fields journal June 2019
Nonlinear saturation and oscillations of collisionless zonal flows journal June 2019
Nonlinear saturation and oscillations of collisionless zonal flows text January 2019
Nonlinear saturation and oscillations of collisionless zonal flows text January 2019

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