Turbulent transport in the Madison Symmetric Torus reversed-field pinch

Journal Article · Wed Jul 01 04:00:00 EDT 1992 · Physics of Fluids B; (United States)

DOI:https://doi.org/10.1063/1.860020· OSTI ID:7182437

Rempel, T D; Almagri, A F; Assadi, S; Den Hartog, D J; Hokin, S A; Prager, S C; Sarff, J S; Shen, W; Sidikman, K L; Spragins, C W; Sprott, J C; Stoneking, M R; Zita, E J ^[1]

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1. University of Wisconsin, Madison, Wisconsin 53706 (United States)

Measurements of edge turbulence and the associated transport are ongoing in the Madison Symmetric Torus (MST) reversed-field pinch (Fusion Technol. {bold 19}, 131 (1991)) using magnetic and electrostatic probes. Magnetic fluctuations are dominated by {ital m}=1 and {ital n} {similar to}2{ital R}/{ital a}, tearing modes. Particle losses induced by magnetic field fluctuations have been found to be ambipolar ({l angle}{ital {tilde J}}{sub {parallel}} {ital {tilde B}}{sub {ital r}}{r angle}/{ital B}{sub 0}=0). Electrostatic fluctuations are broadband and turbulent, with mode widths {Delta}{ital m}{similar to}3--7 and {Delta}{ital n}{similar to}70--150. Particle, parallel current, and energy transport arising from coherent motion with the fluctuating {bold {tilde E}}{times}{bold B} drift have been measured. Particle transport via this channel is comparable to the total particle loss from MST. Energy transport (from {l angle}{ital {tilde P}{tilde E}}{sub {phi}} {r angle}/{ital B}{sub 0}) due to electrostatic fluctuations is relatively small, and parallel current transport (from {l angle}{ital {tilde J}}{sub {parallel}} {ital {tilde E}}{sub {phi}}{r angle}/{ital B}{sub 0}) may be small as well.

• OSTI ID: 7182437
• Journal Information: Physics of Fluids B; (United States), Journal Name: Physics of Fluids B; (United States) Vol. 4:7; ISSN 0899-8221; ISSN PFBPE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700310 -- Plasma Confinement-- (1992-)
700330* -- Plasma Kinetics
Transport
& Impurities-- (1992-)
ANNULAR SPACE
CLOSED CONFIGURATIONS
CONFIGURATION
CONFINEMENT
FLUCTUATIONS
INSTABILITY
MAGNETIC FIELD CONFIGURATIONS
PINCH EFFECT
PLASMA CONFINEMENT
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
REVERSE-FIELD PINCH
SPACE
TEARING INSTABILITY
TOROIDAL CONFIGURATION
TRANSPORT THEORY
TURBULENCE
VARIATIONS