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Schematic of the experimental setup.
(a) Absorption scan of Ar transition in a short-pulsed DBD from 30 up to along with a simultaneously acquired free-spectral range étalon scan signal. (b) A plot of collisional width with pressure. The collisional width is normalized at using Doppler gas temperature measurement.
(a) Simultaneously acquired diode-laser absorption scans of Ar transition in a DBD and in a reference cell dc discharge. (b) The measured frequency shift is plotted with the DBD pressure. The solid line is a least-squares fit to the data and the dashed line is the corresponding pressure-temperature isotherm at .
Gas temperature measurements in DBD by three methods.
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