Physical properties of plasma streamers produced on water surface.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F16%3A00468683" target="_blank" >RIV/61389021:_____/16:00468683 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Physical properties of plasma streamers produced on water surface.

Popis výsledku v původním jazyce

Summary form only given. Since high voltage plasma discharges over water surface in the air have been studied in recent years for their potential applicability in several biomedical and industrial domains. This paper reports on experimental investigations of basic physical characteristics of these discharges. The streamers were produced in a tungsten needle-to-water surface geometry, and were forced to propagate in one direction by presence of a glass streamer guide. The needle electrode was driven by 44 kV/3.5 μs voltage pulses. Experimental arrangements limited total length of the streamers to about 320 mm. The experiments were performed with different gases: air, N2, and O2, every at 1 atmosphere unit pressure. Time and spatially resolved spectroscopic measurements have been done. The emission spectra were significantly changing during life span of the produced streamers. The early spectra of the discharges in the air and nitrogen atmosphere were dominated by N2 2nd positive system. After about 150 ns the N2 radiation disappeared, and emissions from atomic hydrogen took place instead. Spectra of the discharges in O2 atmosphere provided possibility of calculation of the excitation temperature from both atomic hydrogen and oxygen emissions

Název v anglickém jazyce

Physical properties of plasma streamers produced on water surface.

Popis výsledku anglicky

Summary form only given. Since high voltage plasma discharges over water surface in the air have been studied in recent years for their potential applicability in several biomedical and industrial domains. This paper reports on experimental investigations of basic physical characteristics of these discharges. The streamers were produced in a tungsten needle-to-water surface geometry, and were forced to propagate in one direction by presence of a glass streamer guide. The needle electrode was driven by 44 kV/3.5 μs voltage pulses. Experimental arrangements limited total length of the streamers to about 320 mm. The experiments were performed with different gases: air, N2, and O2, every at 1 atmosphere unit pressure. Time and spatially resolved spectroscopic measurements have been done. The emission spectra were significantly changing during life span of the produced streamers. The early spectra of the discharges in the air and nitrogen atmosphere were dominated by N2 2nd positive system. After about 150 ns the N2 radiation disappeared, and emissions from atomic hydrogen took place instead. Spectra of the discharges in O2 atmosphere provided possibility of calculation of the excitation temperature from both atomic hydrogen and oxygen emissions

Druh

O - Ostatní výsledky

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů