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Plasma transport induced by kinetic Alfvén wave turbulence
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10.1063/1.4759167
/content/aip/journal/pop/19/10/10.1063/1.4759167
http://aip.metastore.ingenta.com/content/aip/journal/pop/19/10/10.1063/1.4759167
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic figure of a KAW phase structure and orbits of resonant particles. The left color panel shows the phase of and the right color panel shows that of . Gyrating ions with are considered (thin black arrows). The force induced by leads to E×B-like drift motion and that by to grad-B drift (thick black arrows). These drift motions result in cross-field transport in the direction as depicted by the trajectories of the guiding centers (grey arrows).

Image of FIG. 2.
FIG. 2.

Numerical solutions of the linearized Vlasov-Maxwell equations for KAWs using , , , and , shown as a function of where is proton acoustic gyroradius, : (a) real frequency normalized to proton cyclotron frequency, ; (b) damping rate normalized to real frequency, ; (c) parallel phase velocity normalized to Alfvén velocity, ; (d) wave polarizations, (dashed) and (dotted); (e) phase angles of and with respect to , (dashed), and (dotted), respectively.

Image of FIG. 3.
FIG. 3.

(a) The modeled spectrum of transverse magnetic fluctuations (see details in the text); (b) the drift velocities of a resonant particle normalized to proton thermal velocity, (dashed) and (dotted). The solutions of the linearized Vlasov-Maxwell equations shown in Fig. 2 are used.

Image of FIG. 4.
FIG. 4.

The drift velocities normalized to proton thermal velocity, (dashed) and (dotted), evaluated at the spectral breakpoint () shown in Fig. 3(a). The linearized Vlasov-Maxwell equations for KAWs are solved at different , using , , , and .

Image of FIG. 5.
FIG. 5.

Normalized wave amplitudes (upper two panels) and the drift velocities of protons normalized to proton thermal velocity (lower three panels) for : (a) with , (b) with , (c) , (d) , and (e) . In the lower three panels, the drift velocities are plotted versus ( position of the gyrocenter) for four cases with (solid), (dashed), (dotted), and (dotted-dashed), where . The results shown in Figs. 2 and 3 are used.

Image of FIG. 6.
FIG. 6.

The drift velocities of protons normalized to proton thermal velocity, (dashed), , (dotted), and (solid) for . The results shown in Figs. 2 and 3 are used.

Image of FIG. 7.
FIG. 7.

Color contour plots of the drift velocities of protons normalized to proton thermal velocity, (a) , (b) , and (c) , as functions of parallel and perpendicular velocities of protons. Calculation is done using the results shown in Figs. 2 and 3.

Image of FIG. 8.
FIG. 8.

Color contour plots of (a) (b) , and (c) , as functions of parallel and perpendicular velocities of protons (see definitions in the text). Calculation is done using the results shown in Figs. 2 and 3.

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/content/aip/journal/pop/19/10/10.1063/1.4759167
2012-10-11
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Plasma transport induced by kinetic Alfvén wave turbulence
http://aip.metastore.ingenta.com/content/aip/journal/pop/19/10/10.1063/1.4759167
10.1063/1.4759167
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