**Author details**

N.D. Tran

*Energy and Environment Lab., Department of Mechanical Engineering, University of Technical Education Hochiminh City, Thu Duc District, Hochiminh City, Vietnam* 

T. Kikuchi, N. Harada and T. Sasaki

*Plasmadynamics Lab., Department of Electrical Engineering, Nagaoka University of Technology, Kamitomioka, Nagaoka, Niigata, Japan* 
