Radial dependence of surface streamer-channel luminosity: experimental evidence of Gaussian radiative profiles in Ar and N2

0380828 - ÚFP 2013 RIV GB eng J - Journal Article
Šimek, Milan - Ambrico, P. F.
Radial dependence of surface streamer-channel luminosity: experimental evidence of Gaussian radiative profiles in Ar and N2.
Plasma Sources Science & Technology. Roč. 21, č. 5 (2012), 055014-055014. ISSN 0963-0252. E-ISSN 1361-6595
R&D Projects: GA ČR(CZ) GAP205/12/1709
Institutional research plan: CEZ:AV0Z20430508
Keywords : surface dielectric barrier discharge * Abel inverse transform * Gaussian function
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 2.515, year: 2012
http://iopscience.iop.org/0963-0252/21/5/055014/pdf/0963-0252_21_5_055014.pdf

Radial distributions of electronically excited species produced during surface streamer propagation were obtained by applying the Abel inverse transform to projected luminosities of single streamers. The streamers were generated in an argon and nitrogen surface coplanar dielectric barrier discharge at atmospheric pressure and their magnified microscopic images were registered with high time resolution. Selected regions of the projected luminosities were processed by the Abel inverse transform procedure based on the Hankel–Fourier method assuming cylindrical symmetry of the streamer channel. Projected as well as Abel-inverted profiles were fitted by Gaussian functions. It is shown that the projected profiles, in addition to the Abel-inverted ones, can be well approximated by the sum of two coaxial Gaussians with two different half-widths and weights. The sharper Gaussian component with higher weight characterizes the radial dependence of the primary cathode-directed streamer-channel
Permanent Link: http://hdl.handle.net/11104/0211439