Formation and structure of transport barriers during confinement transitions in toroidal plasma

Date

2004-09-15

Authors

Punzmann, Horst
Shats, Michael

Journal Title

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Publisher

American Physical Society

Abstract

Density pedestal formation is studied experimentally during spontaneous low-to-high confinement transitions in the H-1 heliac. Poloidally extended potential structures, or zonal flows, seem to play the major role both in the spatial structure and in the temporal evolution of the pedestal formation. Zonal flows transiently generate radially localized maxima in the radial electric-field shear in L mode which coincides with the radial location of the pedestal in H mode.

Description

Keywords

Keywords: Carrier concentration; Electric field effects; Electron transitions; Error correction; Magnetic field effects; Magnetic flux; Natural frequencies; Spectroscopic analysis; Transport properties; Potential spectrum; Spatiotemporal structures; Toroidal plasma

Citation

Physical Review Letters 93.12 (2004): 125003/1-4

Source

Physical Review Letters

Type

Journal article

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DOI

10.1103/PhysRevLett.93.125003

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