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Nonlinear dissipation of circularly polarized Alfvén waves due to the beam-induced obliquely propagating waves
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10.1063/1.4748296
/content/aip/journal/pop/19/8/10.1063/1.4748296
http://aip.metastore.ingenta.com/content/aip/journal/pop/19/8/10.1063/1.4748296

Figures

Image of FIG. 1.
FIG. 1.

The growth rates () of (a) the resonant instability RI), which excites the RH-polarized waves, and (b) the Alfvén II instability,12 which excites the obliquely propagating shear Alfvén waves (KAWs) in the system corresponding to run 0, where and .

Image of FIG. 2.
FIG. 2.

The snap shots of (a) the power spectra of the transverse magnetic field , (b) , and (c) at .

Image of FIG. 3.
FIG. 3.

Time evolution of the power spectra of parallel propagating waves (with the perpendicular wave number l = 0) obtained by Fourier transforming the transverse magnetic field in the x direction for (a) run 1, (b) run 2, and (c) run 3.

Image of FIG. 4.
FIG. 4.

Time evolution of (a) total magnetic energy (), (b) magnetic energy of parallel propagating waves (), and (c) magnetic energy of the parent wave (), respectively. The black (gray) thick and thin lines correspond to runs 1 (3) and 2 (4).

Image of FIG. 5.
FIG. 5.

The snap shots of the power spectra of the transverse magnetic field at (a) , (b) , (c) in run 1, and (d) in run 3.

Image of FIG. 6.
FIG. 6.

The nonlinear term evaluated in run 1, which are averaged over . The combinations of k in which the finite value of is observed are marked by arrows. is indicated in (a) and (b).

Image of FIG. 7.
FIG. 7.

The nonlinear term evaluated in run 1, which are averaged over . The wave-wave coupling processes become complex due to the presence of the broadband wave spectra shown in Fig. 5(b).

Image of FIG. 8.
FIG. 8.

The temporal changes of the total magnetic energy () in the runs with (gray lines, run 0), = 0.1 (dashed lines), = 0.25 (dotted lines), = 0.5 (solid lines), respectively. (a) and (b) correspond to the runs with 2-D and 1-D system, respectively. The other parameters used in the runs are same as those in run 1.

Image of FIG. 9.
FIG. 9.

Time evolution of the power spectra of parallel propagating waves (with the perpendicular wave number l = 0) obtained by Fourier transforming the transverse magnetic field in the x direction for (a) run 5and (b) run 6.

Image of FIG. 10.
FIG. 10.

Time evolution of the power spectra of parallel propagating waves (with the perpendicular wave number l = 0) obtained by Fourier transforming the density in the x direction for run 5.

Tables

Generic image for table
Table I.

Parameters used in simulation runs. for the LH-parent waves. , where . The nonmonochromatic Alfvén wave with is initially given in Runs 5 and 6.

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/content/aip/journal/pop/19/8/10.1063/1.4748296
2012-08-29
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Nonlinear dissipation of circularly polarized Alfvén waves due to the beam-induced obliquely propagating waves
http://aip.metastore.ingenta.com/content/aip/journal/pop/19/8/10.1063/1.4748296
10.1063/1.4748296
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