Diagnostics of atmospheric pressure plasma jets during treatment of various samples (CROSBI ID 636288)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Popović, Dean ; Zaplotnik, Rok ; Bišćan, Marijan ; Milošević, Slobodan
engleski
Diagnostics of atmospheric pressure plasma jets during treatment of various samples
We report on reciprocal infl uence between the atmospheric pressure plasma jet (APPJ) and sample surface which is a common situation in various plasma applications. This relationship is often disregarded. We implemented optical emission spectroscopy (OES), absorption pulsed cavity ringdown spectroscopy (CRDS) and electromagnetic (EM) characterization of atmospheric plasma needle jet. Characterization was performed during treatment of various samples versus distance to the sample. We have shown that sample material and its distance from the tip of the electrode have a pronounced infl uence on electromagnetic and optical characteristics of atmospheric pressure plasma jet, such as jet length, shape, color, voltage, current, power, electromagnetic fi eld and concentrations of plasma species. Special attention is given to the metastable He(3S1) atoms which play an important role in atmospheric pressure plasma jet chemistry processes both at surfaces and inside the plasma. The maximum measured density in a spatially-resolved density distribution of a free jet (without sample), at a fl ow of 2 slm, was around 7×1011 cm−3, while the sample insertion increased the densities by up to 10 times. Eight diff erent samples of the same sizes but diff erent electrical conductivities were used to investigate the infl uence of a sample material on the He metastable densities. The correlation between sample conductivities and metastable He densities above the sample surface was found. Metastable He density can also be further increased by decreasing sample distance, increasing conductive sample surface area and by increasing He fl ow. Further studies with the aim of real-time monitoring to control APPJ surface treatments will be discussed. [1] R. Zaplotnik, M. Biscan, Z. Kregar, U. Cvelbar, M. Mozetic, S. Milosevic, Spectrochemica Acta B, 103 (2015) 124-130 [2] R. Zaplotnik, M. Bišćan, N. Krstulović, D. Popović, S. Milošević, Plasma Sources Sci. Technol. 24 (5) (2015) 054004 [3] V. Šantak, R. Zaplotnik, Z. Tarle, S. Milošević, Applied Spectroscopy 69 (11) (2015) 1327-1333
atmospheric pressure plasma jets ; cavity ringdown spectroscopy ; helium metastables
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Podaci o prilogu
87-87.
2016.
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objavljeno
978-961-92989-8-5
Podaci o matičnoj publikaciji
16th Joint Vacuum Conference (JVC-16) 14th European Vacuum Conference (EVC-14) 23rd Croatian-Slovenian Vacuum Meeting PROGRAMME AND BOOK OF ABSTRACTS
Kovač, Janez ; Jakša, Gregor
Ljubljana: Slovenian Society for Vacuum Technique (DVTS)
Podaci o skupu
16th Joint Vacuum Conference (JVC-16), 14th European Vacuum Conference (EVC-14), 23rd Croatian-Slovenian Vacuum Meeting
predavanje
06.06.2016-10.06.2016
Portorož, Slovenija