DONG Li-fang, LI Yong-hui,. Propagation Velocity in Hollow Needle to Plate Discharge[J]. Chinese Journal of Luminescence, 2014,35(4): 476-480 DOI: 10.3788/fgxb20143504.0476.
Propagation Velocity in Hollow Needle to Plate Discharge
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 (3.10.2)10
6
cm/s
respectively. While in the negative discharge
they were 1.6 cm and (2.20.1)10
7
cm/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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references
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