A two-dimensional model of He/O2 atmospheric pressure plasma needle discharge
Qian Mu-Yang†a), Yang Cong-Yinga), Chen Xiao-Changa), Liu San-Qiua), Yan Wenb), Liu Fu-Chengc), Wang De-Zhenb)
       
Ionization reaction rate (mol/m3·s) distributions of three different reaction mechanisms. (a) Helium related (R3, R4, and R5), (b) ionization of O2 by electron (R28), and Penning ionization of O2 by helium metastables (R36, R37).