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

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

DOI  :  10.2172/1056484
RP-ID  :  PPPL-4829
PID  :  OSTI ID: 1056484

学科分类：原子、分子光学和等离子物理

美国|英语

来源: SciTech Connect

【 摘 要 】

Gas-Puff-Imaging (GPI) is a two dimensional diagnostic which measures the edge D?? 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 D?? light emission obtained by GPI on NSTX with DEGAS 2 simulations of D?? light emission for specific experiments. Both the simulated spatial distribution and absolute intensity of the D?? light emission agree well with the experimental data obtained between ELMs in H-mode.