Modeling of hydrocarbon fueling

Conference · Sun Jul 01 00:00:00 EDT 1990

OSTI ID:6681431

Hogan, J. T. ^[1]; Pospieszczyk, A. ^[2]

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1. Oak Ridge National Lab., TN (USA)
2. Kernforschungsanlage Juelich GmbH (Germany, F.R.). Inst. fuer Plasmaphysik

We have compared a database of rate coefficients for CH{sub 4} with experiments on PISCES-A to understand the role of carbon-based impurities in determining the fueling profile of carbon-dominated machines. A three-dimensional Monte Carlo model that embodies the Ehrhardt-Langer CH{sub 4} breakup scheme has been developed. The model has been compared with spectroscopic observations of the spatial variation of the hydrocarbon product decay rates, and reasonable agreement has been found. The comparison is sensitive to the non-Maxwellian electron distribution and to observed spatial inhomogeneities in the electron density and temperature profiles. Applications of the model to parameters characteristic of the tokamak scrape-off layer are presented.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6681431
• Report Number(s): ORNL/TM-11542; CONF-901099-1; ON: DE90014790; TRN: 90-025337
• Resource Relation: Conference: 7. American Physical Society topical conference on atomic processes in plasmas, Gaithersburg, MD (USA), 2 Oct 1990
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
THERMONUCLEAR REACTOR FUELING
MATHEMATICAL MODELS
BREAKUP REACTIONS
ELECTRON DENSITY
HYDROCARBONS
IMPURITIES
MONTE CARLO METHOD
PLASMA SCRAPE-OFF LAYER
TEMPERATURE DISTRIBUTION
TOKAMAK DEVICES
BOUNDARY LAYERS
CLOSED PLASMA DEVICES
LAYERS
NUCLEAR REACTIONS
ORGANIC COMPOUNDS
THERMONUCLEAR DEVICES
700205* - Fusion Power Plant Technology- Fuel
Heating
& Injection Systems