Comparison of Gas Puff Imaging Data in NSTX with the DEGAS 2 Simulation
Authors: B. Cao, D.P. Stotler, S.J. Zweben, M. Bell, A.Diallo, B. LeBlanc
Abstract:
Gas-Pu -Imaging (GPI) is a two dimensional diagnostic which measures
the edge Dα light emission from a neutral Dα gas puff near the outer mid-
plane of the National Spherical Torus Experiment (NSTX). DEGAS 2 is a
3-D Monte Carlo code used to model neutral transport and plasma-neutral
interactions in fusion plasmas. In this paper, we compare the measured
and modeled Dα light emission for speci c NSTX experiments. Both the
simulated spatial distribution and radiance of the Dα light emission agree
well with the experimental data obtained between Edge Localized Modes
(ELMs) in ELMy H-modes.
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Submitted to:
Fusion Science and Technology (November 2012)
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Download PPPL-4865 (pdf 10.77 MB 27 pp)
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