Simulation of experimentally achieved DIII-D detached plasmas using the UEDGE code

Journal Article · Wed May 01 04:00:00 EDT 1996 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.871993· OSTI ID:282904

Porter, G D; Allen, S L; Brown, M; Fenstermacher, M E; Hill, D N; Jong, R A; Leonard, A W; Nilson, D; Rensink, M E; Rognlien, T D; Smith, G R ^[1]

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1. Lawrence Livermore National Laboratory, P.O. Box 808, L-637, Livermore, California 94550 (United States)

The introduction of a divertor Thomson scattering system in DIII-D [J. Luxon {ital et} {ital al}., {ital International} {ital Conference} {ital on} {ital Plasma} {ital Physics} {ital and} {ital Controlled} {ital Nuclear} {ital Fusion} (International Atomic Energy Agency, Vienna, 1986), p. 159] has enabled accurate determination of the plasma properties in the divertor region. Two plasma regimes are identified: detached and attached. The electron temperature in the detached regime is about 2 eV, much lower than 5{endash}10 eV determined earlier. Fluid models of the DIII-D scrape-off layer plasma successfully reproduce many of the features of these two regimes, including the boundaries for transition between them. Detailed comparison between the results obtained from the fluid models and experiment suggest the models underestimate the spatial extent of the low-temperature region associated with the detached plasma mode. Low-temperature atomic physics processes that are not included in the present models may account for this discrepancy. {copyright} {ital 1996 American Institute of Physics.}

• Research Organization: General Atomics
• DOE Contract Number: AC03-89ER51114; W-7405-ENG-48
• OSTI ID: 282904
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 3; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DIVERTORS
DOUBLET-3 DEVICE
ELECTRON DENSITY
ELECTRON TEMPERATURE
ITER TOKAMAK
PLASMA DIAGNOSTICS
PLASMA SCRAPE-OFF LAYER
PLASMA SIMULATION
THOMSON SCATTERING