The Influence of Electrode Gap Width on Plasma Properties of Diffuse Surface Coplanar Barrier Discharge in Nitrogen

• Authors: ČECH Jan; SŤAHEL Pavel; ČERNÁK Mirko; NAVRÁTIL Zdeněk
• Year of publication: 2008
• Type: Article in Proceedings
• Conference: Programme & Abstract Book of 23rd Symposium on Plasma Physics and Technology, Prague, Cyech Republic, 13.-19.June 2008
• MU Faculty or unit: Faculty of Science
• Field: Plasma physics
• Keywords: diffuse coplanar surface barrier discharg;electrode gap width;plasma properties
• Description: In this work we have studied the influence of electrode gap width (inter-electrode distance) on plasma properties of the diffuse coplanar surface barrier discharge. The outer conditions and discharge configuration can substantially influence properties of the discharge. Better understanding of these effects can lead to optimization of the discharge parameters for industrial applications. In this work the discharge was operated in nitrogen at atmospheric pressure. The electrode gap width was varied in the range from 0.6 to 2.2 mm. The input voltage, electrode temperature and gas flow was kept constant for all cases. Plasma parameters were studied by the means of time and space resolved optical emission spectroscopy and oscilloscopic measurements. These measurements gave us time and space distribution of discharge luminosity (e.g. intensities of second positive and first negative systems of nitrogen) and 1D-spatial profiles of rotational and vibrational temperatures.

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