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Title: Comparison of Gas Puff Imaging Data in NSTX with the DEGAS 2 Simulation

Technical Report ·
DOI:https://doi.org/10.2172/1057053· OSTI ID:1057053

Gas-Puff-Imaging (GPI) is a two dimensional diagnostic which measures the edge Dα light emission from a neutral D2 gas puff nears the outer mid-plane of NSTX. DEGAS 2 is a 3-D Monte Carlo code used to model neutral transport and atomic physics in tokamak plasmas. In this paper we compare measurements of the Dα light emission obtained by GPI on NSTX with DEGAS 2 simulations of Dα light emission for specific experiments. Both the simulated spatial distribution and absolute intensity of the Dα light emission agree well with the experimental data obtained between ELMs in H-mode. __________________________________________________

Research Organization:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
DE-ACO2-09CH11466
OSTI ID:
1057053
Report Number(s):
PPPL-4828
Country of Publication:
United States
Language:
English

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