Abstract
Two kinds of atmospheric argon plasma jet were generated by hollow needle to plate discharge. The velocity of discharge propagation was measured by two photomultipliers(PMT) and the length of the discharge was recorded by an ICCD camera. It was found that the velocity and the length were different during different voltage phase. In the positive discharge,the length and the velocity were 0. 8 cm and(3. 1 ± 0. 2) × 106cm/s,respectively. While in the negative discharge, they were 1. 6 cm and(2. 2 ± 0. 1) × 107cm/s,respectively. However,the two discharges propagated along the same direction. Moreover,the distribution of excitation temperature was obtained. The results show that the electric field plays an important role in propagating of plasma jet.
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