Monte Carlo impurity transport modeling in the DIII-D Tokamak
- General Atomics, PO Box 85608, San Diego, California 92186 (United States)
- Palomar College, 1140 West Mission Road, San Marcos, California 92069 (United States)
A description of the carbon transport and sputtering physics contained in the Monte Carlo Impurity (MCI) transport code is given. Examples of statistically significant carbon transport pathways are examined using MCI's unique tracking visualizer and a mechanism for enhanced carbon accumulation on the high field side of the divertor chamber is discussed. Comparisons between carbon emissions calculated with MCI and those measured in the DIII-D tokamak are described. Good qualitative agreement is found between 2D carbon emission patterns calculated with MCI and experimentally measured carbon patterns. While uncertainties in the sputtering physics, atomic data, and transport models have made quantitative comparisons with experiments more difficult, recent results using a physics based model for physical and chemical sputtering has yielded simulations with about 50% of the total carbon radiation measured in the divertor. These results and plans for future improvement in the physics models and atomic data are discussed.
- OSTI ID:
- 21202608
- Journal Information:
- AIP Conference Proceedings, Vol. 443, Issue 1; Conference: International conference on atomic processes in plasmas, Auburn, AL (United States), 23-26 Mar 1998; Other Information: DOI: 10.1063/1.56566; (c) 1998 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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