Abstract
In this paper, we report the successful development of non-thermal atmospheric plasma torch employing high voltage power supply. Usually atmospheric plasma is generated at high temperature (>1000 °C) and it is quite a challenge to generate cold plasma (<150 °C). The plasma torch in this assembly uses helium gas. The length of helium plasma glow discharge in this research is studied and optimized, with flow rate varied from 2 to 7 liters per mins, at varied applied voltage of 1.20 to 2.00 kV. The generated cold helium plasma has tunable length of around 5 to 35 mm, as cold as 26 °C. The plasma setup in this study is projected to be suitable for future applications in several fields such as industrial wastewater processing, as well as food processing, or agricultural field.
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