Application of Saturated Absorption Spectroscopy to Plasma Diagnostics

22nd International Conference on Spectral Line Shapes

Nishiyama, S.^1 ; Goto, M.^2 ; Wang, H.^1 ; Sasaki, K.^1

Graduate School of Engineering, Hokkaido University, Sapporo

060-8628, Japan^1

National Institute for Fusion Science, Toki

509-5292, Japan^2

关键词: Atomic hydrogen;    Cross over;    Fine structures;    Magnetized plasmas;    Saturated-absorption spectroscopy;    Saturation spectroscopy;    Weak magnetic fields;    Zeeman splittings;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/548/1/012035/pdf
DOI  :  10.1088/1742-6596/548/1/012035

来源: IOP

【 摘 要 】

In this work, we utilized saturation spectroscopy to the Balmer-alpha line of atomic hydrogen in a linear magnetized plasma source with the intention of applying it to plasma diagnostics. The fine-structure of the Balmer-alpha line was observed clearly in weak magnetic field strength. Most of the peaks are assigned as transitions of the fine-structure of the Balmer-alpha line and its cross-over peaks. However, irregular cross-over peaks also observed and the population exchange among the 2s and the 2p states was suggested. Saturation spectra with Zeeman-splitting were also observed, however, the spectra became complicated with many small peaks.