Behaviour and external optical control of surface charges in a coplanar barrier discharge analysed from transverse and longitudinal electric field measurement

A self-consistent two-dimensional fluid model is employed to investigate the coaxial–coplanar dielectric-barrier discharge (DBD) excited by the sinusoidal voltage in atmospheric helium. Simulation results show that there are two current pulses in the positive half cycle, but only one in the negative half cycle. The discharge is transformed from the Townsend-like mode, through the glow-like mode, and back to the Townsend-like mode in both the positive and negative half cycles, during which the electric field line exhibits an arc-shape profile due to the configuration of coaxial–coplanar electrodes. In the glow-like mode, the cathode fall is located near the inner edge of the ground electrode at the first positive current peak, but close to the outer edge of the ground electrode at the second positive current peak. At the negative current peak, the cathode fall is distributed near the outer edge of the high voltage electrode. Since the instantaneous anode and the instantaneous cathode are on the same side of the discharge space, the dielectric layer is simultaneously covered by positive and negative surface charges due to the movement of charged particles. It is also found that the surface charge density changes significantly on the dielectric layer facing the electrodes. A further study reveals that a stronger discharge always occurs in the central circular area and an alternately complementary discharge takes place in the periphery ring area in the positive half cycle due to the activator–inhibitor effect. This feature is helpful for producing uniform plasma in a whole cycle of DBD.

show abstract

Numerical simulation of coaxial–coplanar dielectric-barrier discharge in atmospheric helium

Ran

Wang

Lei

et al. 2022

AIP Advances

View full text Add to dashboard Cite

show abstract

2D Thermoluminescence imaging of dielectric surface long term charge memory of plasma surface interaction in DBD discharges

Ambrico¹,

Ambrico²,

Schiavulli³

et al. 2014

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Behaviour and external optical control of surface charges in a coplanar barrier discharge analysed from transverse and longitudinal electric field measurement

Cited by 2 publications

References 21 publications

Numerical simulation of coaxial–coplanar dielectric-barrier discharge in atmospheric helium

Numerical simulation of coaxial–coplanar dielectric-barrier discharge in atmospheric helium

2D Thermoluminescence imaging of dielectric surface long term charge memory of plasma surface interaction in DBD discharges

Contact Info

Product

Resources

About