Space and Time Resolved Optical Emission Spectroscopy of Diffuse Coplanar Barrier Discharge

• Authors: ČECH Jan; SŤAHEL Pavel; NAVRÁTIL Zdeněk
• Year of publication: 2008
• Type: Article in Proceedings
• Conference: 11th International Symposium on High Pressure, Low Temperature Plasma Chemistry, September 7-12, 2008, Oléron Island, France; Contributed Papers Volume 1
• MU Faculty or unit: Faculty of Science
• Field: Plasma physics
• Keywords: diffuse coplanar surface barrier discharge;space and time resolved spectroscopy
• Description: In this work we have studied the influence of input voltage ampitude and electrode temperature 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 of 0.7 mm and gas flow were kept in all cases. The input voltage was varied in the range of 12-18kV and grounded electrode temperature in the range of 10-80oC. 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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