TITLE

Effect of resonant magnetic perturbations on secondary structures in drift-wave turbulence

AUTHOR(S)
Leconte, M.; Diamond, P. H.
PUB. DATE
August 2011
SOURCE
Physics of Plasmas;Aug2011, Vol. 18 Issue 8, p082309
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Recent experiments showed a decrease of long range correlations during the application of resonant magnetic perturbations (RMPs) [Y. Xu et al., Nucl. Fusion 51, 063020 (2011)]. This finding suggests that RMPs damp zonal flows. To elucidate the effect of the RMPs on zonal structures in drift wave turbulence, we construct a generalized Hasegawa-Wakatani model including RMP fields. The effect of the RMPs is to induce a linear coupling between the zonal electric field and the zonal density gradient, which drives the system to a state of electron radial force balance for large RMP amplitude. A predator-prey model coupling the primary drift wave dynamics to the zonal modes evolution is derived. This model has both turbulence drive and RMP amplitude as control parameters and predicts a novel type of transport bifurcation in the presence of RMPs. The novel regime has a power threshold which increases with RMP amplitude as γc~[δBrB]2.
ACCESSION #
65108116

 

Related Articles

  • Studies of the EPR Parameters for Bi2Sr2 YCu2O8:Er3+. Wu, S. Y.; Zhang, H. M.; Hu, Y. X.; Wang, X. F. // Journal of Superconductivity & Novel Magnetism;Jul2010, Vol. 23 Issue 5, p839 

    The electron paramagnetic resonance (EPR) parameters (the anisotropic g factors g x, g y, g z, and the hyperfine structure constants A x, A y, and A z) of the two orthorhombic Er3+ centers in Bi2Sr2 YCu2O8 are theoretically studied from the perturbation formulas of these parameters for a 4f11...

  • Experimental analysis of drift waves destabilization in a toroidal plasma. Riccardi, C.; Xuantong, D.; Salierno, M.; Gamberale, L.; Fontanesi, M. // Physics of Plasmas;Nov97, Vol. 4 Issue 11, p3749 

    Studies the development of turbulence in a toroidal magnetoplasma. Evaluation of wave number, frequency spectra, and bicoherence coefficients of density fluctuations associated to drift wave propagation; Characterization of density fluctuations both in absence and in presence of nonlinear...

  • Electrostatic fluctuations in the Current Sustained Torus IV at Nagoya University. Zhai, K.; Kobayashi, M.; Tashiro, K.; Kojima, H.; Takagi, M.; Takamura, S. // Physics of Plasmas;Jun2000, Vol. 7 Issue 6 

    A detailed experimental investigation of plasma fluctuation and its modification due to radial electric field effects, both its shear and curvature, has been carried out on the Current Sustained Torus IV at Nagoya University [Takamura et al., J. Plasma Fusion Res. 74, 38 (1998)] through...

  • Dynamics of zonal flow saturation in strong collisionless drift wave turbulence. Kim, Eun-jin; Diamond, P. H. // Physics of Plasmas;Nov2002, Vol. 9 Issue 11, p4530 

    Generalized Kelvin–Helmholtz (GKH) instability is examined as a mechanism for the saturation of zonal flows in the collisionless regime. By focusing on strong turbulence regimes, GKH instability is analyzed in the presence of a background of finite-amplitude drift waves. A detailed study...

  • Competition between curvature and chemistry in a spherically expanding detonation. Bukiet, B.; Jones, J. // Applied Physics Letters;5/30/1988, Vol. 52 Issue 22, p1921 

    The methods of bifurcation theory and asymptotic analysis are used to study curvilinear perturbations of a plane detonation wave. An asymptotic model is derived for the small curvature limit. The nonlinear competition between curvature and chemistry is manifested by a highly degenerate critical...

  • Bifurcation and scaling of drift wave turbulence intensity with collisional zonal flow damping. Malkov, M. A.; Diamond, P. H. // Physics of Plasmas;Sep2001, Vol. 8 Issue 9 

    Interacting drift wave–zonal flow turbulence is examined at the spectral level of description using an extended “predator–prey” model. Analytic solutions that describe both the linear scaling of transport with ion–ion collisionality as well as the saturation...

  • What Are the Limitations of Braginskii’s Fluid Equations and Hazeltine’s Drift Kinetic Equation? Simakov, Andrei N.; Catto, Peter J. // AIP Conference Proceedings;2006, Vol. 871 Issue 1, p238 

    The two-fluid equations of Braginskii miss heat-flux terms in the viscosity. In this work we employ drift orderings to recover these missing terms and obtain a fully self-consistent system of short mean-free path two-fluid equations. These equations cannot be recovered from the short mean-free...

  • Measurement of 2/1 intrinsic error field of Joint TEXT tokamak. Rao, B.; Ding, Y. H.; Yu, K. X.; Jin, W.; Hu, Q. M.; Yi, B.; Nan, J. Y.; Wang, N. C.; Zhang, M.; Zhuang, G. // Review of Scientific Instruments;Apr2013, Vol. 84 Issue 4, p043504 

    The amplitude and spatial phase of the intrinsic error field of Joint TEXT (J-TEXT) tokamak were measured by scanning the spatial phase of an externally exerted resonant magnetic perturbation and fitting the mode locking thresholds. For a typical plasma with current of 180 kA, the amplitude of...

  • Zonal flow generation and its feedback on turbulence production in drift wave turbulence. Pushkarev, Andrey V.; Bos, Wouter J. T.; Nazarenko, Sergey V. // Physics of Plasmas;Apr2013, Vol. 20 Issue 4, p042304 

    Plasma turbulence described by the Hasegawa-Wakatani equations is simulated numerically for different models and values of the adiabaticity parameter C. It is found that for low values of C turbulence remains isotropic, zonal flows are not generated and there is no suppression of the meridional...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics