Characteristic plume morphologies of atmospheric Ar and He plasma jets excited by a pulsed microwave hairpin resonator
Chen Zhao-Quan1, †, Zhou Ben-Kuan1, Zhang Huang1, Hong Ling-Li1, Zou Chang-Lin1, Li Ping1, Zhao Wei-Dong1, Liu Xiao-Dong1, Stepanova Olga2, Kudryavtsev A A2
       

(color online) (a) Schematic of the experimental system. Photo images of (b) Ar plasma and (c) He plasma are taken with maximum power of 5 W, pulsed frequency of 10 kHz, duty cycle of 0.2, and gas flow rate of 1.0 slm.