Appearance of a low-frequency turbulence feature during saturated ohmic confinement plasma discharges

C. L. Rettig; G. M. Staebler; T. L. Rhodes; E. J. Doyle; W. A. Peebles; K. H. Burrell

doi:10.1088/0741-3335/43/9/308

Appearance of a low-frequency turbulence feature during saturated ohmic confinement plasma discharges

C. L. Rettig, G. M. Staebler, T. L. Rhodes, E. J. Doyle, W. A. Peebles, K. H. Burrell

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4 Scopus citations

Abstract

A low-frequency turbulence feature appears in high-density ohmically heated plasma discharges in the DIII-D tokamak in which the ion temperature gradient (ITG) mode is predicted to be unstable. The feature is observed only when the density is greater than the linear ohmic confinement saturation density. Gyrokinetic stability calculations indicate that the ITG mode frequency is comparable to the measured frequency, the wavenumber measured is comparable to that predicted for the ITG mode, and the linear growth rate is significantly greater in the high-density regime.

Original language	English
Pages (from-to)	1273-1279
Number of pages	7
Journal	Plasma Physics and Controlled Fusion
Volume	43
Issue number	9
DOIs	https://doi.org/10.1088/0741-3335/43/9/308
State	Published - Sep 2001
Externally published	Yes

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abstract = "A low-frequency turbulence feature appears in high-density ohmically heated plasma discharges in the DIII-D tokamak in which the ion temperature gradient (ITG) mode is predicted to be unstable. The feature is observed only when the density is greater than the linear ohmic confinement saturation density. Gyrokinetic stability calculations indicate that the ITG mode frequency is comparable to the measured frequency, the wavenumber measured is comparable to that predicted for the ITG mode, and the linear growth rate is significantly greater in the high-density regime.",

author = "Rettig, {C. L.} and Staebler, {G. M.} and Rhodes, {T. L.} and Doyle, {E. J.} and Peebles, {W. A.} and Burrell, {K. H.}",

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T1 - Appearance of a low-frequency turbulence feature during saturated ohmic confinement plasma discharges

AU - Rettig, C. L.

AU - Staebler, G. M.

AU - Rhodes, T. L.

AU - Doyle, E. J.

AU - Peebles, W. A.

AU - Burrell, K. H.

PY - 2001/9

Y1 - 2001/9

N2 - A low-frequency turbulence feature appears in high-density ohmically heated plasma discharges in the DIII-D tokamak in which the ion temperature gradient (ITG) mode is predicted to be unstable. The feature is observed only when the density is greater than the linear ohmic confinement saturation density. Gyrokinetic stability calculations indicate that the ITG mode frequency is comparable to the measured frequency, the wavenumber measured is comparable to that predicted for the ITG mode, and the linear growth rate is significantly greater in the high-density regime.

AB - A low-frequency turbulence feature appears in high-density ohmically heated plasma discharges in the DIII-D tokamak in which the ion temperature gradient (ITG) mode is predicted to be unstable. The feature is observed only when the density is greater than the linear ohmic confinement saturation density. Gyrokinetic stability calculations indicate that the ITG mode frequency is comparable to the measured frequency, the wavenumber measured is comparable to that predicted for the ITG mode, and the linear growth rate is significantly greater in the high-density regime.

UR - http://www.scopus.com/inward/record.url?scp=0035442253&partnerID=8YFLogxK

U2 - 10.1088/0741-3335/43/9/308

DO - 10.1088/0741-3335/43/9/308

M3 - Article

AN - SCOPUS:0035442253

SN - 0741-3335

VL - 43

SP - 1273

EP - 1279

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 9

ER -

Appearance of a low-frequency turbulence feature during saturated ohmic confinement plasma discharges

Abstract

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