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Spectral features of the geodesic acoustic mode and its interaction with turbulence in a tokamak plasmaa)
a)Paper NI1 6, Bull. Am. Phys. Soc. 52, 188 (2007).
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10.1063/1.2838242
/content/aip/journal/pop/15/5/10.1063/1.2838242
http://aip.metastore.ingenta.com/content/aip/journal/pop/15/5/10.1063/1.2838242
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Probe array structure and experimental arrangement.

Image of FIG. 2.
FIG. 2.

Coherency (a) and cross-phase (b) spectra of fluctuations measured by poloidal (black line) and toroidal (red dot line) separations of and , respectively; (c) the .

Image of FIG. 3.
FIG. 3.

(a) spectrum of fluctuations ; (b) and (c) spectra of fluctuations ; (d) the conventional wavenumber (black line) and the statistic dispersion relationship (red dot line) of fluctuations .

Image of FIG. 4.
FIG. 4.

Coherency (a) and cross-phase (b) spectra between the GAM oscillation and the envelope of fluctuation in frequencies of ; coherency (c) and cross-phase (d) between and envelope of as a function of frequency .

Image of FIG. 5.
FIG. 5.

Coherency (a) and cross-phase (b) spectra between the GAM oscillation and the envelope of fluctuation as a function of frequency .

Image of FIG. 6.
FIG. 6.

Coherency (a) and cross-phase (b) between and envelope of as a function of amplitude modulation index for a model signal simulating amplitude modulation and phase modulation effects of GAM on turbulence.

Image of FIG. 7.
FIG. 7.

Energy transfer function for a model signal simulation phase modulation effect of GAM on density fluctuations.

Image of FIG. 8.
FIG. 8.

(a) Summed square auto- and cross-bicoherences and ; (b) square auto- and cross-bicoherences for .

Image of FIG. 9.
FIG. 9.

(a) Auto-bicoherency and modulation index as a function of frequency ; (b) resonance function as a function of frequency .

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/content/aip/journal/pop/15/5/10.1063/1.2838242
2008-02-15
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Spectral features of the geodesic acoustic mode and its interaction with turbulence in a tokamak plasmaa)
http://aip.metastore.ingenta.com/content/aip/journal/pop/15/5/10.1063/1.2838242
10.1063/1.2838242
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