Zonal flow triggers the L-H transition in the Experimental Advanced Superconducting Tokamak

The kinetic energy transfer between shear flows and the ambient turbulence is investigated in the Experimental Advanced Superconducting Tokamak during the L-H transition. As the rate of energy transfer from the turbulence into the shear flow becomes comparable to the energy input rate into the turbu...

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Veröffentlicht in:Physics of plasmas 2012-07, Vol.19 (7)
Hauptverfasser: Manz, P., Xu, G. S., Wan, B. N., Wang, H. Q., Guo, H. Y., Cziegler, I., Fedorczak, N., Holland, C., Müller, S. H., Thakur, S. C., Xu, M., Miki, K., Diamond, P. H., Tynan, G. R.
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Sprache:eng
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Zusammenfassung:The kinetic energy transfer between shear flows and the ambient turbulence is investigated in the Experimental Advanced Superconducting Tokamak during the L-H transition. As the rate of energy transfer from the turbulence into the shear flow becomes comparable to the energy input rate into the turbulence, the transition into the H-mode occurs. As the observed behavior exhibits several predicted features of zonal flows, the results show the key role that zonal flows play in mediating the transition into H-mode.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.4737612