Observation of a quasicoherent mode in the Texas Experimental Tokamak

Journal Article · Thu Apr 01 04:00:00 EST 1993 · Physics of Fluids B; (United States)

DOI:https://doi.org/10.1063/1.860918· OSTI ID:6706460

Tsui, H Y.W.; Schoch, P M; Wootton, A J ^[1]

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1. Fusion Research Center, The University of Texas at Austin, Austin, Texas 78712 (United States)

A quasicoherent feature localized near the magnetic flux surface having a safety factor [ital q]=3 has been detected by Langmuir probe and heavy ion beam probe (HIBP) measurements in the edge plasma of the Texas Experimental Tokamak (TEXT) [Nucl. Technol. Fusion [bold 1], 479 (1981)]. A mode is identified with relatively low poloidal wave number ([ital m]=12) compared to the usual broadband turbulence with [ital m] in the range of 50 to 100. In contrast to the turbulent activity, this mode is collisional and does not produce a fluctuation-driven radial particle flux via the coupling between density and potential fluctuation. A comparison with the expectation of the drift-tearing activity indicates that the mode can be collisional drift-tearing unstable.

• DOE Contract Number: FG05-88ER53267
• OSTI ID: 6706460
• Journal Information: Physics of Fluids B; (United States), Journal Name: Physics of Fluids B; (United States) Vol. 5:4; ISSN 0899-8221; ISSN PFBPEI
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700340* -- Plasma Waves
Oscillations
& Instabilities-- (1992-)
CHARGED PARTICLES
CLOSED PLASMA DEVICES
CORRELATION FUNCTIONS
DRIFT INSTABILITY
ELECTRIC PROBES
FLUCTUATIONS
FUNCTIONS
HEAVY IONS
INSTABILITY
IONS
LANGMUIR PROBE
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA MICROINSTABILITIES
PROBES
TEARING INSTABILITY
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TURBULENCE
VARIATIONS