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Author Chatterjee, R. ♦ Hallock, G. A. ♦ Wootton, A. J.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION ♦ TOKAMAK DEVICES ♦ FLUCTUATIONS ♦ PLASMA DENSITY ♦ TURBULENCE ♦ PLASMA CONFINEMENT ♦ TEXT DEVICES ♦ PLASMA DRIFT
Abstract Two distinct broadband modes of density turbulence propagating in the electron drift direction are simultaneously observed, in the first complete measurement of the wave number frequency spectrum S(k,thinsp{omega}) in the interior of the TEXT-U tokamak plasma. A drift wave-type mode with a peak in the wave number spectrum at k{sub {theta}}{approximately}4.5 cm{sup {minus}1} is found on both sides of the magnetic axis. A long-wavelength mode with k{sub {theta}}{le}2 cm{sup {minus}1} is found only on the low field side of the tokamak. The results resolve apparent discrepancies in previous turbulence measurements. Confinement properties of TEXT-U are consistent with the transport predicted by the observed drift wave-type {bar k}{sub {theta}}=3 cm{sup {minus}1} . {copyright} {ital 1999} {ital The American Physical Society}
ISSN 00319007
Educational Use Research
Learning Resource Type Article
Publisher Date 1999-04-01
Publisher Place United States
Journal Physical Review Letters
Volume Number 82
Issue Number 14


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