OES Diagnostics of Pre-Breakdown Light Emission in Coplanar APGD in Helium

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Authors

NAVRÁTIL Zdeněk MORÁVEK Tomáš ČECH Jan RÁHEĽ Jozef

Year of publication 2016
Type Article in Proceedings
Conference 28th Summer School and International Symposium on the Physics of Ionized Gases, Contributed Papers
MU Faculty or unit

Faculty of Science

Citation
Web http://www.spig2016.ipb.ac.rs/spig2016-book-online.pdf
Field Plasma physics
Keywords OES; pre-breakdown; DBD; coplanar; helium
Description Phase resolved photon counting was applied to record low-resolved optical spectra of pre-breakdown light emitted in coplanar barrier discharge in helium. Light emissions from species as OH*, N2+*, He* as well as thermoluminescence of Al2O3 ceramics were observed during the whole voltage period. Moreover, a light with continuum spectrum was observed shortly before the discharge breakdown. Assuming neutral bremsstrahlung as the origin of the continuum, electric field of 0.5-1 kV/cm was obtained in this discharge phase.
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