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The excitation of geodesic acoustic mode flows by a resonant magnetic field and by resonant heating
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10.1063/1.4794837
/content/aip/journal/pop/20/3/10.1063/1.4794837
http://aip.metastore.ingenta.com/content/aip/journal/pop/20/3/10.1063/1.4794837
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Density perturbation. The density perturbation is plotted in the poloidal (R, z) plane. The yellow to red region corresponds to an increasingly positive density perturbation, the blue to purple region corresponds to an increasingly negative density perturbation, and the density perturbation is zero in the green region.

Image of FIG. 2.
FIG. 2.

Oscillating density perturbation. The temporal dependence of the density perturbation at (R = 3, z = 0.44) is plotted when the safety factor q 0 on axis is (a) 1.2 and (b) 0.3.

Image of FIG. 3.
FIG. 3.

Poloidal flow speed generated by oscillating coil currents. The temporal dependence of the poloidal flow speed Vpol on the midplane (z = 0) at R = 3.65 is plotted for coil current Jcoil  = (a) 0.2, (b) 1, and (c) 5.

Image of FIG. 4.
FIG. 4.

Poloidal flow generated by oscillating coil currents. The poloidal flow speed Vpol when is plotted in the poloidal (R, z) plane at t = 1200. The yellow to red region corresponds to an increasing clockwise flow, the blue region is a region of smaller counter-clockwise flow, and the flow is zero in the green region. The maximum value of Vpol in the red region is given by the peak in the temporal oscillation shown in Fig. 3(c) at t = 1200.

Image of FIG. 5.
FIG. 5.

Poloidal flow speed generated by oscillating coil currents at . The temporal dependence of the poloidal flow speed Vpol on the midplane (z = 0) at R = 3.65 is plotted for coil current Jcoil  = 5.

Image of FIG. 6.
FIG. 6.

Poloidal flow generated by oscillating coil currents at . The poloidal flow speed Vpol when is plotted in the poloidal (R, z) plane at t = 2826. The yellow to red region corresponds to an increasing clockwise flow, the blue region is a region of smaller counter-clockwise flow, and the flow is zero in the green region. The maximum value of Vpol in the red region is given by the peak in the temporal oscillation shown in Fig. 5 at t = 2826.

Image of FIG. 7.
FIG. 7.

Poloidal flow speed generated by an oscillating heat source. The temporal dependence of the poloidal flow speed Vpol on the midplane (z = 0) at R = 3.56 is plotted for heating amplitude A = (a) 0.02, (b) 0.1, and (c) 0.4.

Image of FIG. 8.
FIG. 8.

Poloidal flow generated by an oscillating heat source. The poloidal flow speed Vpol when A = 0.4 is plotted in the poloidal (R, z) plane at t = 1458. The yellow to red region corresponds to an increasing clockwise flow, and the flow is zero in the green region. The maximum value of Vpol in the red region is given by the peak in the temporal oscillation shown in Fig. 7(c) at t = 1458.

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/content/aip/journal/pop/20/3/10.1063/1.4794837
2013-03-12
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: The excitation of geodesic acoustic mode flows by a resonant magnetic field and by resonant heating
http://aip.metastore.ingenta.com/content/aip/journal/pop/20/3/10.1063/1.4794837
10.1063/1.4794837
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