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On the application of electron cyclotron emission imaging to the validation of theoretical models of magnetohydrodynamic activitya)
a)Paper GI2 2, Bull. Am. Phys. Soc. , 107 (2010).
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10.1063/1.3563572
/content/aip/journal/pop/18/5/10.1063/1.3563572
http://aip.metastore.ingenta.com/content/aip/journal/pop/18/5/10.1063/1.3563572
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Figures

Image of FIG. 1.
FIG. 1.

(Color) ECEI measures subtle features of Alfvén eigenmode structure predicted by nonperturbative modeling. In (a), the symmetric RSAE structure predicted by ideal MHD is shown. demonstrates that fast ions contributions may alter the eigenmode structure, inducing symmetry breaking as shown in (b). Experimental measurement by ECEI (c) confirms these predictions providing an opportunity for model validation.

Image of FIG. 2.
FIG. 2.

(Color) The temperature perturbation produced by the saturated displacement of the sawtooth precursor is shown. The complete instantaneous view of the ECEI diagnostic is shown at right overlaid on a reconstruction of the poloidal mode structure. Reconstruction is performed by mapping data collected near the midplane at consecutive time intervals to increasing poloidal angle under an assumption of rigid-body rotation.

Image of FIG. 3.
FIG. 3.

(Color) A localized reconnection resulting in a sawtooth crash is imaged by ECEI. In (a), an accumulation of heat in the mixing zone has resulted in an annulus of elevated temperature before the crash begins. The estimated position of the surface is indicated by the dashed white line. In (b), penetration of the inversion radius begins with the formation of an apparent “pressure finger.” In (c) and (d), the opening widens, with heat being expelled. As the opening closes in (e), complete ejection of heat from the core results in a flattening of the temperature profile.

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/content/aip/journal/pop/18/5/10.1063/1.3563572
2011-04-29
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: On the application of electron cyclotron emission imaging to the validation of theoretical models of magnetohydrodynamic activitya)
http://aip.metastore.ingenta.com/content/aip/journal/pop/18/5/10.1063/1.3563572
10.1063/1.3563572
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