Impurity effect on kinetic [eta][sub [ital i]]-mode in tokamak plasma

Conference · Sun May 01 04:00:00 EDT 1994 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:7179732

Dong, J Q; Horton, W; Su, X N ^[1]

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1. Institute for Fusion Studies, The University of Texas at Austin, Austin, Texas 78712 (United States)

The impurity effects on the ion temperature gradient driven mode, or [eta][sub [ital i]]-mode, in a tokamak plasma are studied in shearless slab, sheared slab and toroidal magnetic confinement configurations. The stability analysis shows that the impurity ions have a stabilizing effect on the mode in high temperature tokamak plasmas and such effects depend on (i) the impurity concentration in the plasma (the dilution effect), (ii) the density profile of the impurity ions (when [ital T][sub [ital z]]=[ital T][sub [ital i]] is assumed with [ital T][sub [ital i]] and [ital T][sub [ital z]] being the temperature of the hydrogen and impurity ions, respectively), (iii) the dynamics of the impurity ions. The analysis also shows the importance of taking impurity parameters into account when experimental results are analyzed with [eta][sub [ital i]]-mode theory. In the limit of adiabatic electron dynamics the ambipolar of the total particle flux is achieved by the balance of the outward working gas (hydrogenic) particle flux with the inward impurity flux.

• DOE Contract Number: FG05-80ET53088
• OSTI ID: 7179732
• Report Number(s): CONF-9301107--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Journal Volume: 284:1
• 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
ELEMENTS
GROWTH FACTORS
HYDROGEN
IMPURITIES
INSTABILITY
ION TEMPERATURE
MITOGENS
NONMETALS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
PLASMA CONFINEMENT
PLASMA IMPURITIES
PLASMA INSTABILITY
PROTEINS
TEMPERATURE GRADIENTS
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES