Session GP1 - Poster Session IV.
POSTER session, Tuesday afternoon, October 30
Exhibit Hall B,
From the Doppler broadening of emission profiles of carbon impurity lines, the temperature and parallel velocity distributions of carbon ions in the divertor region of DIII-D have been deduced in an ELMing H-mode discharge with 9\,MW of NBI. We have analyzed the following emission lines: CI (^3P \rightarrow ^3P^0, 9087ÅCII (^2P^0 \rightarrow ^2S, 6579.7ÅCIII (^3P^0 \rightarrow ^3S, 4648.8Åand CIV (n=7 to n=6 transitions at 7726ÅIn previous work we have shown that the CIV emission results from charge exchange from C^+4 so the temperature and flow velocity inferred represent that of C^+4. The spectroscopy system provides 7 vertical and 5 tangential view chords, so it is possible to reconstruct a flow pattern of carbon ions across the divertor region using the Zeeman splitting of their \pi components for deduction of the radial position along the viewing chord. We will compare the measure carbon flow for the C^+1, C^+2 and C^+4 ions to UEDGE 2D fluid model predictions.