Speaker
Dr
Keisuke Fujii
(Kyoto university)
Description
The radial distribution of the neutral hydrogen atom density (n_H) and pressure (P_H) in the Large Helical Device (LHD) is studied. The n_H distribution is determined from a detailed analysis of the intensity-calibrated Balmer-alpha line profile while the P_H distribution is obtained with a simple one-dimensional analytical model. We have for the first time determined n_H at the center of a fusion-oriented plasma, which is approximately three orders smaller than that at the edge. On the contrary, P_H changes only a factor of 10 from the edge to core regions. The central n_H has a tendency to become smaller as the line-averaged electron density is increased.
| Country or International Organisation | Japan |
|---|---|
| Paper Number | EX/P6-31 |
Primary author
Dr
Keisuke Fujii
(Kyoto university)
Co-authors
Dr
Motoshi Goto
(National Institute for Fusion Science)
Prof.
Shigeru Morita
(National Institute for Fusion Science)
