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An atmospheric pressure needle plasma is generated with a hollowneedle-plate dielectric barrier discharge, and the plasma parameters are measured by optical emission spectroscopy. The length of the needle plasma reaches 3 cm with an argon flow rate in the range from 3.5 to 6.1 ml/min when the applied voltage is 7.2 kV. The spatial distribution of oxygen-atom spectral-line intensity indicates that...
A 3cm long plasma torch is generated when argon gas is introduced by using a hollowneedle-plate discharge device working in atmosphere. The electron excited temperature, vibrational temperature and the gas temperature at different positions of plasma torch are studied by using optical emission spectrum. The gas temperature is obtained by comparing experimental line shape of OH radicals band around...
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