Self-organization phenomena in cold atmospheric pressure plasma slit jet

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F22%3APU147333" target="_blank" >RIV/00216305:26620/22:PU147333 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/22:00128318

Výsledek na webu

<a href="https://iopscience.iop.org/article/10.1088/1361-6595/acab82" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6595/acab82</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6595/acab82" target="_blank" >10.1088/1361-6595/acab82</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Self-organization phenomena in cold atmospheric pressure plasma slit jet

Popis výsledku v původním jazyce

The radio frequency plasma slit jet, which produces 150 mm wide streaming plasma outside the jet body, exhibits exciting self-organization phenomena that resemble the self-organized patterns of dielectric barrier discharge (DBD) filaments. Similarly, as in DBD, the filaments are surrounded by an inhibition zone that does not allow two filaments to come closer to each other. With fast camera imaging, we observed the filamentary character of the discharge in all the studied gas feeds (Ar, Ar/N-2, and Ar/O-2). Still, the visual appearance of the filaments in the plasma and their interaction with a dielectric surface depended significantly on the gas feed. As the breakdown voltage in pure Ar is relatively low compared to the applied one, new filaments form frequently. Such newly created filaments disrupted the characteristic inter-filament distance, forcing the system to rearrange. The frequent ignition and decay processes in Ar led to short filament lifetimes (0.020-0.035 s) and their high jitter speed (0.9-1.7 m s(-1)), as determined with an image processing custom code based on Gwyddion libraries. The number of filaments was lower in the Ar/O-2 and Ar/N-2 mixtures. It was attributed to a loss of energy in the excitation of rotational and vibrational levels and oxygen electronegativity. Since the probability of low-current side discharges transitioning into the full plasma filaments was limited in these gas mixtures, the self-organized pattern was seldom disrupted, leading to lesser movement and longer lifetimes. Unlike in Ar or Ar/O-2, the constricted filaments in Ar/N-2 were surrounded by diffuse plasma plumes, likely connected to the presence of long-lived nitrogen species. We demonstrated in the polypropylene treatment that the self-organization phenomena affected the treatment uniformity.

Název v anglickém jazyce

Self-organization phenomena in cold atmospheric pressure plasma slit jet

Popis výsledku anglicky

The radio frequency plasma slit jet, which produces 150 mm wide streaming plasma outside the jet body, exhibits exciting self-organization phenomena that resemble the self-organized patterns of dielectric barrier discharge (DBD) filaments. Similarly, as in DBD, the filaments are surrounded by an inhibition zone that does not allow two filaments to come closer to each other. With fast camera imaging, we observed the filamentary character of the discharge in all the studied gas feeds (Ar, Ar/N-2, and Ar/O-2). Still, the visual appearance of the filaments in the plasma and their interaction with a dielectric surface depended significantly on the gas feed. As the breakdown voltage in pure Ar is relatively low compared to the applied one, new filaments form frequently. Such newly created filaments disrupted the characteristic inter-filament distance, forcing the system to rearrange. The frequent ignition and decay processes in Ar led to short filament lifetimes (0.020-0.035 s) and their high jitter speed (0.9-1.7 m s(-1)), as determined with an image processing custom code based on Gwyddion libraries. The number of filaments was lower in the Ar/O-2 and Ar/N-2 mixtures. It was attributed to a loss of energy in the excitation of rotational and vibrational levels and oxygen electronegativity. Since the probability of low-current side discharges transitioning into the full plasma filaments was limited in these gas mixtures, the self-organized pattern was seldom disrupted, leading to lesser movement and longer lifetimes. Unlike in Ar or Ar/O-2, the constricted filaments in Ar/N-2 were surrounded by diffuse plasma plumes, likely connected to the presence of long-lived nitrogen species. We demonstrated in the polypropylene treatment that the self-organization phenomena affected the treatment uniformity.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Plasma Sources Science and Technology

ISSN

0963-0252

e-ISSN

1361-6595

Svazek periodika

31

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

1-13

Kód UT WoS článku

000907216600001

EID výsledku v databázi Scopus

2-s2.0-85145878511