Schlieren High-Speed Imaging of a Nanosecond Pulsed Atmospheric Pressure Non-equilibrium Plasma Jet

Abstract Non-equilibrium plasma is a promising technology for the generation of ozone and removal of exhausted fuel gases. However, applications of non-equilibrium plasma are restricted by energy utilization efficiency in many industry fields. Discharge excited by nanosecond pulsed power is regarded as one of the most efficient methods. In this study, a compact 5 stages stacked blumlein pulse forming line and photoconductive semiconductor switches-based power source was introduced to generate pulsed plasma. This compact source could achieve over 50 kV with 10.1 ns pulse width and 4.8 ns pulse rising time. Coaxial cylindrical reactor was employed to generate a pulsed streamer discharge driven by the nanosecond pulsed source in atmospheric pressure air. Electrical parameters of the streamer discharge have been obtained in this study, the instantaneous power dissipation exceeds 8 MW and the average energy consumption of each pulse exceeds 56 mJ. Experiments of high speed photography have been conducted to observe the evolution process. It can be found that streamer heads start from the central wire electrode and then head to the grounded cylinder electrode in all radial direction of the coaxial electrode. Triple wire-to-cylinder electrodes discharge shows that all the three coaxial discharges develop synchronously and symmetrically, which shows that is capable of generating large volume non-equilibrium diffusive streamer discharge plasma.

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Bacterial-killing effect of atmospheric pressure non-equilibrium plasma jet and oral mucosa response

Journal of Huazhong University of Science and Technology [Medical Sciences] ◽

10.1007/s11596-011-0690-y ◽

2011 ◽

Vol 31 (6) ◽

pp. 852-856 ◽

Cited By ~ 22

Author(s):

Dexi Liu ◽

Zilan Xiong ◽

Tianfeng Du ◽

Xincai Zhou ◽

Yingguang Cao ◽

...

Keyword(s):

Oral Mucosa ◽

Atmospheric Pressure ◽

Plasma Jet ◽

Bacterial Killing ◽

Killing Effect ◽

Equilibrium Plasma ◽

Non Equilibrium

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Functional-Group-Retaining Polymerization of Hydroxyethyl Methacrylate by Atmospheric Pressure Non-Equilibrium Plasma

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.596.65 ◽

2013 ◽

Vol 596 ◽

pp. 65-69 ◽

Cited By ~ 1

Author(s):

Xiao Meng Fei ◽

Yuki Kondo ◽

Xiao Yi Qian ◽

Shin-ichi Kuroda ◽

Tamio Mori ◽

...

Keyword(s):

Atmospheric Pressure ◽

Plasma Polymerization ◽

Functional Group ◽

Plasma Jet ◽

Polymeric Films ◽

Polymerization Reaction ◽

Hydroxyethyl Methacrylate ◽

Equilibrium Plasma ◽

Ft Ir ◽

Non Equilibrium

In this study, functional-group-retaining polymerization of hydroxyethyl methacrylate (HEMA) was carried out by using an atmospheric pressure non-equilibrium Ar plasma jet. The polymeric films deposited under different conditions were characterized by Fourier transform infrared spectroscopy (FT-IR). The FT-IR spectra show that HEMA was polymerized (carbon-carbon double bond disappeared) and the main functional groups were successfully retained in the plasma-polymerization films. The plasma-polymerization mechanism and the polymerization reaction kinetics will be discussed.

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