Comparison of Gas Puff Imaging Data in NSTX with DEGAS 2 Simulations

B. Cao; D. P. Stotler; S. J. Zweben; M. Bell; A. Diallo; B. Leblanc

doi:dx.doi.org/10.13182/FST13-A17044

/Create an Account

Home / Publications / Journals / Fusion Science and Technology / Volume 64 / Number 1

Comparison of Gas Puff Imaging Data in NSTX with DEGAS 2 Simulations

B. Cao, D. P. Stotler, S. J. Zweben, M. Bell, A. Diallo, B. Leblanc

Fusion Science and Technology / Volume 64 / Number 1 / July 2013 / Pages 29-38

Technical Paper / dx.doi.org/10.13182/FST13-A17044

pdf View or Purchase Article

Articles are hosted by Taylor and Francis Online.

Gas puff imaging is a two-dimensional diagnostic that measures the edge D light emission from a neutral D₂ gas puff near the outer midplane of the National Spherical Torus Experiment (NSTX). DEGAS 2 is a three-dimensional Monte Carlo code used to model neutral transport and plasma-neutral interactions in fusion plasmas. In this paper, we compare the measured and modeled D light emission for specific NSTX experiments. Both the simulated spatial distribution and the radiance of the D light emission agree well with the experimental data obtained during time periods between edge-localized modes (ELMs) in ELMy H-modes.