Optical characteristics of nanosecond discharge on a mixture of air with vapors zinc


Introduction. Research optical characteristics of plasma nanosecond discharge in the air between metal electrodes showed that UV spectra prevail band molecules of N2 , OH, NO, CN and spectral lines NI, NII, OI, OII. As the distance between the electrodes to 0.5-2.0 mm in the spectra of radiation level in the air appear spectral lines of atoms and ions electrode material. These "point" UV lamp with short pulses of radiation needed for applications in spectroscopy, photochemistry and photobiology.
Purpose. This article presents the results of research performance "point" UV lamps based on zinc electrodes at atmospheric pressure.
Methods. Investigated spectral, electrical and optical properties. At the lamp electrodes submitted bipolar pulses of high voltage 50-100 ns duration, amplitude of ± (20-40) kV. Thus, between the zinc electrode ignited uniform discharge duration of 50-100 ns, pulse amplitude current 50-170 A and plasma volume less than 10 mm3. An spectral and power characteristics of high-voltage nanosecond discharge be tween the zinc electrodes in air atmospheric pressure at small distances between the electrodes. This plasma is a selective source of radiation in the spectral range 200-270 nm.
Conclusion. Thus, the study of characteristics nanosecond discharge between the zinc electrodes in air of atmospheric pressure showed that based on it can be developed selective, windowless ultraviolet lamps for applications in spectroscopy and micro nanotechnologies

Keywords: high voltage nanosecond discharge, zinc, air, emission spectrum, ultraviolet