Modification of tokamak edge turbulence using feedback

Journal Article · Sun May 01 04:00:00 EDT 1994 · Physics of Plasmas; (United States)

DOI:https://doi.org/10.1063/1.870661· OSTI ID:5072497

Richards, B ^[1]; Uckan, T ^[2]; Wootton, A J ^[1]; Carreras, B A ^[2]; Bengtson, R D; Hurwitz, P; Li, G X ^[1]; Lin, H ^[3]; Rowan, W L; Tsui, H Y.W. ^[1]; Sen, A K ^[4]; Uglum, J ^[5]

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1. Fusion Research Center, The University of Texas at Austin, Austin, Texas 78712 (United States)
2. Fusion Energy Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
3. Physics Department, Auburn University, Auburn, Alabama 36849 (United States)
4. Plasma Physics Laboratory, Columbia University, New York, New York 10027 (United States)
5. Fusion Research Center, The University of Texas at Austin, Austin, Texas 78712 (U

Using active feedback, the turbulent fluctuation levels have been reduced by as much as a factor of 2 in the edge of the Texas Experimental Tokamak (TEXT) [K. W. Gentle, Nucl. Fusion Technol. [bold 1], 479 (1981)]. A probe system was used to drive a suppressor wave in the TEXT limiter shadow. A decrease in the local turbulence-induced particle flux has been seen, but a global change in the particle transport at the present time has not been observed. By changing the phase shift and gain of the feedback network, the amplitude of the turbulence was increased by a factor of 10.

• DOE Contract Number: FG05-88ER53267; FG02-87ER53257; AC05-84OR21400
• OSTI ID: 5072497
• Journal Information: Physics of Plasmas; (United States), Journal Name: Physics of Plasmas; (United States) Vol. 1:5; ISSN 1070-664X; ISSN PHPAEN
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700330 -- Plasma Kinetics
Transport
& Impurities-- (1992-)
700340* -- Plasma Waves
Oscillations
& Instabilities-- (1992-)
CLOSED PLASMA DEVICES
CONFINEMENT
FEEDBACK
FLUCTUATIONS
LIMITERS
PHASE SHIFT
PLASMA CONFINEMENT
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TURBULENCE
VARIATIONS