ON THE PLASMA PROPERTIES OF DIFFUSE COPLANAR SURFACE BARRIER DISCHARGE IN HUMID NITROGEN AND HUMID AIR STUDIED BY OPTICAL EMISSION SPECTROSCOPY

ČECH, Jan, Pavel SLAVÍČEK, Pavel SŤAHEL and Mirko ČERNÁK. ON THE PLASMA PROPERTIES OF DIFFUSE COPLANAR SURFACE BARRIER DISCHARGE IN HUMID NITROGEN AND HUMID AIR STUDIED BY OPTICAL EMISSION SPECTROSCOPY. In C. Leys, R. Morent. 4th International Workshop on Cold Atmospheric Pressure Plasmas. GHENT: UNIVERSITEIT GENT, 2009, p. 5-8.

Basic information

• Original name: ON THE PLASMA PROPERTIES OF DIFFUSE COPLANAR SURFACE BARRIER DISCHARGE IN HUMID NITROGEN AND HUMID AIR STUDIED BY OPTICAL EMISSION SPECTROSCOPY
• Authors: ČECH, Jan, Pavel SLAVÍČEK, Pavel SŤAHEL and Mirko ČERNÁK.
• Edition: GHENT, 4th International Workshop on Cold Atmospheric Pressure Plasmas, p. 5-8, 4 pp. 2009.
• Publisher: UNIVERSITEIT GENT

Other information

• Original language: English
• Type of outcome: Proceedings paper
• Field of Study: 10305 Fluids and plasma physics
• Country of publisher: Belgium
• Confidentiality degree: is not subject to a state or trade secret
• Publication form: printed version "print"
• Organization unit: Faculty of Science
• UT WoS: 000282782900003
• Keywords in English: coplanar barrier discharge; optical emission spectroscopy; humidity; nitrogen; technical air
• Tags: International impact

Abstract

In this work we investigated the influence of working gas humidity on the plasma properties of diffuse coplanar surface barrier discharge (DCSBD). As working gases pure nitrogen and technical air admixed with the vapors of distilled water were used. We measured the intensities of second positive system of nitrogen (band 2-0 at 297.7 nm) and integrated emissions of OH (R(1) and R(2) at 306.5 nm), NO-gamma system (band 0-3 at 259 nm) and 0 intensities (at 777.4 nm). The relative humidity of gas was measured and from these measurements the absolute humidity of the gas was estimated. We observed strong dependence of gas humidity on DCSBD behavior. The discharge pattern and emission spectra differs substantially in the case of nitrogen and technical air respectively. In case of nitrogen we observed transition from diffuse-like discharge to sparse-filamentary discharge in higher humidity region and decrease of the OH/N(2) and NO/N(2) intensity ratios. In the case of technical air the discharge remains diffuse for higher value of humidity and then became stable with very dense filamentary pattern. The ratios of OH/N(2) and NO/N(2) intensity are increasing in that case. From the measurements we can conclude that the absolute humidity of working gas plays important role in the DCSBD behavior. Hence the influence of absolute humidity of working gas has to be studied in the case of materials processing applications.

Links

• GD104/09/H080, research and development project: Name: Plazmochemické procesy a jejich technologické aplikace

Investor: Czech Science Foundation

• KAN101630651, research and development project: Name: Tvorba nano-vrstev a nano-povlaků na textiliích s využitím plazmových povrchových úprav za atmosférického tlaku

Investor: Academy of Sciences of the Czech Republic, Preparation of nano-films and nano-coatings on textiles using plasma surface treatment at atmospheric pressure

• MSM0021622411, plan (intention): Name: Studium a aplikace plazmochemických reakcí v neizotermickém nízkoteplotním plazmatu a jeho interakcí s povrchem pevných látek

Investor: Ministry of Education, Youth and Sports of the CR, Study and application of plasma chemical reactions in non-isothermic low temperature plasma and its interaction with solid surface