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Effect of resonant magnetic perturbations on secondary structures in drift-wave turbulence
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10.1063/1.3610547
/content/aip/journal/pop/18/8/10.1063/1.3610547
http://aip.metastore.ingenta.com/content/aip/journal/pop/18/8/10.1063/1.3610547

Figures

Image of FIG. 1.
FIG. 1.

Analogy between zonal modes linear dynamics and coupled dampers.

Image of FIG. 2.
FIG. 2.

Effective nonlinear coupling parameters vs. normalized turbulence energy , for different values of the RMP coupling parameter: (a) and (b) . The parameters are α = 1, β = 0.1, γ = 1, μ = 2, and α′ = 0.

Image of FIG. 3.
FIG. 3.

(Color online) Dynamics of the model without RMPs : turbulence energy (solid line), and energies E ZP , E ZD associated to zonal flows (dashed line) and zonal density (dash-dotted line), for the two possible non-trivial states: (a) L mode-like state and (b) H mode like state. The parameters are the same as in Fig. 2.

Image of FIG. 4.
FIG. 4.

(Color online) Dynamics of the zonal modes—drift waves predator-prey model: turbulence energy (solid line), and energies E ZP , E ZD associated to zonal flows (dashed line) and zonal density (dash-dotted line) before and during an RMP pulse applied at t = 60, for different values of the normalized coupling parameter : (a) for , (b) for , (c) for , and (d) for . The values of the parameters are: α = 1, β = 0.1, γ = 1, μ = 2, and α′ = 0.

Image of FIG. 5.
FIG. 5.

Transition between states of the predator-prey model Eqs. (90) and (91).

Image of FIG. 6.
FIG. 6.

Zonal flow energy and ambient turbulence energy vs. the normalized RMP coupling parameter. Parameters are the same as in Fig. 4.

Image of FIG. 7.
FIG. 7.

(Color online) Steady-state solutions of the ZM-DW predator prey model. (a) energy of zonal flows vs. normalized turbulence energy for different values of the normalized RMP coupling parameter and (b) associated normalized turbulence energy vs. normalized coupling parameter and normalized collisionality . Here, the value of the parameter α is α = 1.

Image of FIG. 8.
FIG. 8.

RMPs increase the power threshold: relative variation of power threshold vs. RMP coupling parameter μ δB , for different values of the collisional drag μ.

Tables

Generic image for table
Table I.

Analogy between the linear Hasegawa-Wakatani model and zonal modes with RMPs.

Generic image for table
Table II.

Possible regimes for the predator-prey model Eqs. (90) and (91). The critical parameters are: and , for the parameters of Fig. 2.

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/content/aip/journal/pop/18/8/10.1063/1.3610547
2011-08-29
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effect of resonant magnetic perturbations on secondary structures in drift-wave turbulence
http://aip.metastore.ingenta.com/content/aip/journal/pop/18/8/10.1063/1.3610547
10.1063/1.3610547
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