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Related Experiment Video

Updated: Jun 27, 2026

An Atmospheric Pressure Plasma Setup to Investigate the Reactive Species Formation

An Atmospheric Pressure Plasma Setup to Investigate the Reactive Species Formation

Published on: November 3, 2016

Handheld Flyback driven coaxial dielectric barrier discharge: Development and characterization.

V J Law¹, V Milosavljević, N O'Connor

¹National Center of Plasma Science and Technology (NCPST), Dublin City University, Dublin 9, Ireland.

The Review of Scientific Instruments

|December 3, 2008

Summary

A new handheld atmospheric pressure plasma device using Flyback circuitry was developed for helium and argon. It efficiently generates plasma discharges, with air influencing plume chemistry in ambient conditions.

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Area of Science:

Plasma Physics
Electrical Engineering

Background:

Atmospheric pressure plasma devices offer versatile applications.
Dielectric barrier discharges (DBDs) are a key technology in plasma generation.
Compact, efficient power supplies are crucial for portable plasma systems.

Purpose of the Study:

To develop a handheld, atmospheric pressure coaxial dielectric barrier discharge (DBD) system.
To investigate its performance with helium and argon using Flyback circuitry.
To analyze the discharge characteristics and plume chemistry.

Main Methods:

Utilized Flyback circuitry with external MOSFET switching for power conversion (10-33 W DC to 1.2-1.6 kV pulse).
Operated the transformer in continuous current mode.
Employed optical emission spectroscopy to study the discharge plume in ambient air.

Main Results:

Achieved argon discharge breakdown voltage of approximately 768 V.
Observed a linear increase in power density (75+/-20% mW/cm(3) per slm) with argon flow rate (0.5-10 slm) at 50 kHz.
Measured power transfer efficiency from 0.1% to 0.65%.
Found air significantly influences plume chemistry, producing abundant neutral argon and molecular nitrogen.

Conclusions:

The developed handheld DBD system is effective for generating atmospheric pressure helium and argon discharges.
The Flyback power supply demonstrates efficient energy transfer for plasma generation.
Ambient air plays a critical role in controlling the plasma plume's chemical composition.