Hydrogen Balmer Series Spectroscopy in Laser-induced Breakdown Plasmas
نویسندگان
چکیده
A review is presented of recent experiments and diagnostics based on Stark broadening of hydrogen Balmer lines in laser-induced optical breakdown plasmas. Experiments primarily utilize pulsed Nd:YAG laser radiation at 1064-nm and nominal 10 nanosecond pulse duration. Analysis of Stark broadening and shifts in the measured H-alpha spectra, combined with Boltzmann plots from H-alpha, H-beta and H-gamma lines to infer the temperature, is discussed for the electron densities in the range of 1016 – 1019 cm – 3 and for the temperatures in the range of 6,000 to 100,000 K.
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