Modeling and analysis of surface roughness effects on sputtering, reflection, and sputtered particle transport
Conference
·
OSTI ID:6477390
- Argonne National Lab., IL (USA)
- Illinois Univ., Urbana, IL (USA)
The microstructure of the redeposited surface in tokamaks may affect sputtering and reflection properties and subsequent particle transport. This subject has been studied numerically using coupled models/codes for near-surface plasma particle kinetic transport (WBC code) and rough surface sputtering (fractal-TRIM). The coupled codes provide an overall Monte Carlo calculation of the sputtering cascade resulting from an initial flux of hydrogen ions. Beryllium, carbon, and tungsten surfaces are analyzed for typical high recycling, oblique magnetic field, divertor conditions. Significant variations in computed sputtering rates are found with surface roughness. Beryllium exhibits high D-T and self-sputtering coefficients for the plasma regime studied (T{sub e} = 30-75 eV). Carbon and tungsten sputtering is significantly lower. 9 refs., 6 figs., 1 tab.
- Research Organization:
- Argonne National Lab., IL (USA)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6477390
- Report Number(s):
- CONF-900505-10; ON: DE91004429
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700103 -- Fusion Energy-- Plasma Research-- Kinetics
700201* -- Fusion Power Plant Technology-- Blanket Engineering
ALKALINE EARTH METALS
ANGULAR DISTRIBUTION
BERYLLIUM
CARBON
CHARGED-PARTICLE REACTIONS
CHARGED-PARTICLE TRANSPORT
CLOSED PLASMA DEVICES
CRYSTAL STRUCTURE
DEUTERON REACTIONS
DISTRIBUTION
DIVERTORS
ELECTRON TEMPERATURE
ELEMENTS
FRACTALS
IMPURITIES
METALS
MICROSTRUCTURE
MONTE CARLO METHOD
NONMETALS
NUCLEAR REACTIONS
PLASMA IMPURITIES
RADIATION TRANSPORT
REFLECTION
ROUGHNESS
SPUTTERING
SURFACE PROPERTIES
TARGETS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TRANSITION ELEMENTS
TRITIUM TARGET
TUNGSTEN
700103 -- Fusion Energy-- Plasma Research-- Kinetics
700201* -- Fusion Power Plant Technology-- Blanket Engineering
ALKALINE EARTH METALS
ANGULAR DISTRIBUTION
BERYLLIUM
CARBON
CHARGED-PARTICLE REACTIONS
CHARGED-PARTICLE TRANSPORT
CLOSED PLASMA DEVICES
CRYSTAL STRUCTURE
DEUTERON REACTIONS
DISTRIBUTION
DIVERTORS
ELECTRON TEMPERATURE
ELEMENTS
FRACTALS
IMPURITIES
METALS
MICROSTRUCTURE
MONTE CARLO METHOD
NONMETALS
NUCLEAR REACTIONS
PLASMA IMPURITIES
RADIATION TRANSPORT
REFLECTION
ROUGHNESS
SPUTTERING
SURFACE PROPERTIES
TARGETS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TRANSITION ELEMENTS
TRITIUM TARGET
TUNGSTEN