Application of Saturated Absorption Spectroscopy to Plasma Diagnostics

Abstract

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.