Actions for Understanding of Neutral Gas Transport in the Alcator C-Mod Tokamak Divertor [electronic resource].

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Understanding of Neutral Gas Transport in the Alcator C-Mod Tokamak Divertor [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2002.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
302 Kilobytes pages : digital, PDF file
Additional Creators
United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
A series of experiments on the effect of divertor baffling on the Alcator C-Mod tokamak provides stringent tests on models of neutral gas transport in and around the divertor region. One attractive feature of these experiments is that a trial description of the background plasma can be constructed from experimental measurements using a simple model, allowing the neutral gas transport to be studied with a stand-alone code. The neutral-ion and neutral-neutral elastic scattering processes recently added to the DEGAS 2 Monte Carlo neutral transport code permit the neutral gas flow rates between the divertor and main chamber to be simulated more realistically than before. Nonetheless, the simulated neutral pressures are too low and the deuterium Balmer-alpha emission profiles differ qualitatively from those measured, indicating an incomplete understanding of the physical processes involved in the experiment. Some potential explanations are examined and opportunities for future exploration a re highlighted. Improvements to atomic and surface physics data and models will play a role in the latter.
Report Numbers
E 1.99:pppl-3690.pdf
pppl-3690.pdf
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
05/07/2002.
"pppl-3690.pdf"
J.L. Terry; C.S. Pitcher; J.D. Elder; C.J. Boswell; B. LaBombard; D.P. Stotler; S. Lisgo.
Princeton Plasma Physics Lab., NJ (US)
Type of Report and Period Covered Note
Topical;
Funding Information
AC02-76CH03073
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