Measurement of electron temperature and density of atmospheric plasma needle

Abstract A dielectric barrier discharge device producing atmospheric argon plasma needle has been studied. The device is palpable as the jet length increases up to 10 mm by increasing the inlet gas flow up to the 7 lpm. Using spectroscopy, the electron temperature has been determined in the range of 1–10ev in different conditions. Also, a method based on the PLTE assumption is applied to the spectrums in order to calculate the electron density of the plasma needle. The electron density varies in the range of (1013–1018 cm−3).