Experimental investigation of the linear and nonlinear properties of an impurity-driven drift wave

Journal Article · Wed Dec 01 04:00:00 EST 1982 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.863718· OSTI ID:6897988

Allen, G R; Yamada, M; Rewoldt, G; Tang, W M

An impurity-driven drift wave is observed to be destabilized by the reversed density gradient of a singly ionized heavy-impurity-ion population in a Q-machine plasma. The evolution of the instability is investigated as it progresses from the initial linear exponential growth phase, into a nonlinear saturated state, whereupon strong radially outward anomalous diffusion is observed. The relationship between the anomalous diffusion coefficient and the wave amplitude is in agreement with estimates obtained from the nonlinear drift-wave turbulence theory of Dupree.

• Research Organization: Plasma Physics Laboratory, Princeton University, Princeton, NJ 08544
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6897988
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 25:12; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107 -- Fusion Energy-- Plasma Research-- Instabilities
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
DENSITY
DRIFT INSTABILITY
IMPURITIES
INSTABILITY
ION WAVES
IONIZATION
NONLINEAR PROBLEMS
OPEN PLASMA DEVICES
PHYSICAL PROPERTIES
PLASMA
PLASMA INSTABILITY
PLASMA MICROINSTABILITIES
PLASMA WAVES
Q DEVICES
STABILIZATION
THERMONUCLEAR DEVICES