Two-component ion distributions in tokamak hot ion plasmas

Journal Article · Tue May 01 04:00:00 EDT 1984 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.864729· OSTI ID:6998577

Ware, A A

The two-component ion distribution observed with active charge-exchange measurements on the tokamak PDX are explained using the Fokker--Planck drift-kinetic equation and assuming that ion self-collisions are dominant for energy scattering. The energetic tail of the distribution, which is diffusing outwards in radius and down in energy, must retain an approximately constant effective temperature T/sub H/equivalent(-partial ln f /sub i//mpartialepsilon)/sup -1/. The discontinuity in the slope of ln f /sub i/ is shown to be the boundary between the inward and outward diffusion parts of f /sub i/ and is a form of contact discontinuity. Energy-scattering collisions with electrons or circulating beam ions, when important, modify the constancy of T/sub H/.

• Research Organization: Institute for Fusion Studies, University of Texas at Austin, Austin, Texas 78712
• OSTI ID: 6998577
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 27:5; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700105* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Theoretical-- (-1987)
CHARGE EXCHANGE
CLOSED PLASMA DEVICES
COLLISIONS
DIFFERENTIAL EQUATIONS
DISTRIBUTION FUNCTIONS
ELECTRON COLLISIONS
ELECTRON-ION COLLISIONS
ENERGY TRANSFER
EQUATIONS
FOKKER-PLANCK EQUATION
FUNCTIONS
HEAT TRANSFER
HOT PLASMA
ION COLLISIONS
ION DRIFT
ION-ION COLLISIONS
KINETIC EQUATIONS
PARTIAL DIFFERENTIAL EQUATIONS
PDX DEVICES
PLASMA
STEADY-STATE CONDITIONS
TEMPERATURE DISTRIBUTION
THERMAL CONDUCTION
THERMONUCLEAR DEVICES
TOKAMAK DEVICES