UV Emission from N2/O2 Pulse Microwave Plasma

Abstract

The emission spectrum from pulse microwave discharge of N₂/O₂ gas mixture in the UV range (from 200 400 nm) was studied in a cylindrical quartz tube aiming to apply it as a mercury free UV light source. The UV light in the 200-280 nm range has germicidal effect which can be used for water purification. In our previous work we used continuous microwave power to produce UV emission from N₂/O₂ discharge. In the present work we used pulse microwave power instead of continuous microwave power. We studied the dependence of pulse width and pulse interval on the intensity of the UV emission from N₂/O₂ discharge. Experimental results showed that the UV emission intensity emitted from N₂/O₂ gas discharge in 200- 400 nm region does not vary with pulse width and pulse interval but depends on applied average power.

DOI: http://dx.doi.org/10.3329/rujs.v38i0.16543

Rajshahi University J. of Sci. 38, 01-08 (2010)