PPPL-4865
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 specic 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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