نرگس رضوی نیا

The stable and uniform non-thermal plasma in atmospheric pressure produced by the surface dielectric barrier discharge (SDBD) device can be used in various industrial applications. Investigation of the electrical properties, especially the measurement of the power consumption of this device, is significant because of the cost-effectiveness importance of its uses in industries. In this paper, the power consumption of the SDBD system with two different structures has been investigated. For this purpose, two SDBD systems with the same material and dimensions of electrodes and dielectric and two different structures comb and mesh electrodes were designed and constructed. After that, under the same conditions, the power consumption of both systems was measured and compared using the monitoring capacitor method. The purpose of this study is to choose the appropriate structure for the electrode in designing of the SDBD device for various industrial applications.

In this work, an argon microwave plasma with a frequency of 2.45 GHz at low pressure is experimentally demonstrated. Then, the characteristics of the formed plasma (temperature and density of electrons) in the presence and without the presence of a magnetic field are calculated and compared by optical emission spectroscopy. Permanent magnets are used to confine the plasma and supply the magnetic field in the electron cyclotron resonance mechanism. With the help of simulation, the proper arrangement of the magnets to produce the desired magnetic field is obtained. Then, using the relevant physical models, the temperature and density of the electrons are calculated. The results show that the magnetic field has a significant effect on the plasma characteristics and causes about 125% increase in temperature and 200% increase in electron density. It is also shown that, as expected, as the pressure decreases, the temperature of the electrons increases and their density decreases. This confirms the accuracy of the experiment and the obtained results