Design and Construction of an Atmospheric Pressure HF Plasma Source
Mohammad Hasanur Rashid *
Department of Applied Physics and Electronic Engineering, University of Rajshahi, Bangladesh.
Md Herokuzzaman
Department of Computer Science and Engineering, World University of Bangladesh, Bangladesh.
Md Masudur Rahman
Department of Applied Physics and Electronic Engineering, University of Rajshahi, Bangladesh.
*Author to whom correspondence should be addressed.
Abstract
Atmospheric pressure plasma sources used in many industrial, environmental, light sources, biological, and medical applications. Aiming these prospects, an effort has been remunerated for the design and construction of a cost-effective atmospheric pressure high frequency (30 KHz) plasma source. The major sections include in this source are, (i) DC power suppliers, (ii) A set of Class A push-pull power amplifiers, (iii) Ferrite core high-frequency power transformer, (iv) Impedance matching network, and (v) Electrode design for plasma production. Two power suppliers have been considered; one is a 12V DC for biasing the base of the 2N3055 power, and the other is a 90V DC for biasing the Class A push-pull power amplifier. Class A push-pull power amplifier is chosen because of its high efficiency of about 50% concerning other types of amplifiers. Ferrite core high-frequency power transformer is designed with a turn ratio of 1:3 in order to step up the voltage to a certain level for producing atmospheric pressure plasma. An impedance matching network is designed to transfer maximum power from the source to the plasma load.
Keywords: Atmospheric pressure, plasma source, power amplifier, impedance matching, electrode design.