Abstract
The current–voltage characteristics of atmospheric pressure plasma jets with various working gases (He, Ne, Ar, N2, and air) are investigated. Systems of the plasma jets are composed of a syringe needle inserted into a glass tube and are operated by a sinusoidal high-voltage through a dc–ac inverter generating several tens of kilohertz. The various electrode structures with or without the ground electrode are analyzed by using an equivalent circuit model. For the biomedical applications concerning the discharge stability and the electric safety with a low plasma-current and a low voltage operation, the suitable structures of plasma jets for each gas are suggested. For the plasma jets of inert gases (He, Ne, and Ar), the discharge triggered by an external ground electrode seems to be suitable, because the low current of a plasma plume is adjusted readily with a low voltage of 1–2 kV. For the jets of N2 and air, the nozzle of a metal ground electrode at the end of a glass tube is suggested to reduce the operation voltage below 3 kV and to acquire a low plume-current of a few milliamperes exiting the metal nozzle.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
