The mechanism of plasma plume termination for pulse-excited plasmas in a quartz tube

• DOI: 10.1063/1.4985332
• Publication Date: 2017-08-17T15:29:40Z
• Authors: Mingzhe Rong; Wenjie Xia; Xiaohua Wang; Zhijie Liu; Dingxin Liu; Zhihu Liang; Xiaoning Zhang; Michael G. Kong
• Keywords: Amorphous solids; Plasmas; Electrostatics; Physics; 0103 physical sciences; Plasma and Beam Physics; Physics of gases; Camera; 01 natural sciences

Although the formation and propagation of plasma plume for atmospheric pressure plasmas have been intensively studied, how does terminate is still little known. In this letter, helium plumes are generated in a long quartz tube by pulsed voltages constant gas flow. The variable pulse width (PW) from 0.5 μs to 200 μs. It found that terminates right after falling edge each voltage when PW < 20 μs, whereas it before edge. When larger than 30 duration starts decrease, termination occur at current zero moment discharge through high-voltage electrode, which much different ground electrode. This indicates part shunted its downstream region. An equivalent circuit model developed, surface charge deposited on crucial accelerating >