Plasma and Fusion Research
Online ISSN : 1880-6821
ISSN-L : 1880-6821
Regular Articles
Time Evolution of Power Spectrum Density in Spontaneous Transition in Cylindrical Magnetized Plasma
Tatsuya KOBAYASHIShigeru INAGAKIStella OLDENBURÜGERKatsuyuki KAWASHIMANoriko OHYAMAYuuki TOBIMATSUHiroyuki ARAKAWAMakoto SASAKIYoshihiko NAGASHIMATakuma YAMADASatoru SUGITAMasatoshi YAGINaohiro KASUYAAkihide FUJISAWASanae-I. ITOHKimitaka ITOH
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2012 Volume 7 Pages 2401054

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Abstract

Preliminary observation results are reported for a new discharge regime in the Plasma Assembly for Nonlinear Turbulent Analysis (PANTA), where spontaneous transitions in the equilibrium profile and fluctuation spectra occur. Two different states are defined by using the mean density value. Axial and radial profiles are observed for the two states, and large profile changes are found. The spatiotemporal evolution of the transition front is measured. Changes in the fluctuation spectrum are evaluated using conditional average and lock-in average.

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© 2012 by The Japan Society of Plasma Science and Nuclear Fusion Research
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