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Numerical simulation of geodesic acoustic modes in a multi-ion system
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10.1063/1.4812593
/content/aip/journal/pop/20/7/10.1063/1.4812593
http://aip.metastore.ingenta.com/content/aip/journal/pop/20/7/10.1063/1.4812593
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

The equilibrium configuration used in the simulation.

Image of FIG. 2.
FIG. 2.

Semi-Lagrangian scheme.

Image of FIG. 3.
FIG. 3.

(a) GAM electric field oscillation with , q = 2.6. (b) Spectrum of the GAM oscillation, with the dashed line indicating the GAM frequency predicted by S-W theory.

Image of FIG. 4.
FIG. 4.

GAM frequency and damping rate vs charge number of impurity ions, with the effective ion mass number fixed. In case 1, , ; in case 2, , ; and in case 3, , .

Image of FIG. 5.
FIG. 5.

Time evolution of the radial electric field for different parameter ; , , , .

Image of FIG. 6.
FIG. 6.

Comparison of frequency and damping rate between theory and simulation; , , , . Here, the solid and dashed lines show the theoretical result evaluated by Eqs. (10) and (11) , respectively. The cross points are the simulation results.

Image of FIG. 7.
FIG. 7.

Amount of the 1st order resonance hydrogen ions.

Image of FIG. 8.
FIG. 8.

Same as Fig. 6 , except that , .

Image of FIG. 9.
FIG. 9.

Same as Fig. 6 , except that , .

Image of FIG. 10.
FIG. 10.

(a) Contour plot of normalized and the particles transit frequency in velocity space with , , . The relative larger values of indicate resonances between particles and wave. (b) The 1st order resonance and the 2nd order resonance . (c) The 3rd order resonance .

Image of FIG. 11.
FIG. 11.

Same as Fig. 10 , except that , .

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/content/aip/journal/pop/20/7/10.1063/1.4812593
2013-07-01
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Numerical simulation of geodesic acoustic modes in a multi-ion system
http://aip.metastore.ingenta.com/content/aip/journal/pop/20/7/10.1063/1.4812593
10.1063/1.4812593
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