High-resolution electric field and temperature distributions in positive streamers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F23%3A00573315" target="_blank" >RIV/61389021:_____/23:00573315 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/23:00131509

Výsledek na webu

<a href="https://www.frontiersin.org/articles/10.3389/fphy.2023.1120284/full" target="_blank" >https://www.frontiersin.org/articles/10.3389/fphy.2023.1120284/full</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3389/fphy.2023.1120284" target="_blank" >10.3389/fphy.2023.1120284</a>

Jazyk výsledku

angličtina

Název v původním jazyce

High-resolution electric field and temperature distributions in positive streamers

Popis výsledku v původním jazyce

In this work, we aim to take a detailed experimental picture of the positive streamer. We apply optical emission spectroscopy to the first negative system (FNS, (Formula presented.)) of (Formula presented.) and the second positive system (SPS, C3Πu → B3Πg) of N2. Large, centimeter wide, and highly reproducible streamers are created in pure nitrogen and synthetic air, at pressures ranging from 33 to 266 mbar. Direct time resolved spectral imaging of the space charge layer resulted in spatiotemporal maps of the calculated reduced electric field strength (E/N) and rovibrational temperature in sub-nanosecond and sub-millimetre resolution. The E/N peaks at approximately 540 and 480 Td, directly in front of the space charge layer, for synthetic air and pure nitrogen respectively, as determined by using the intensity ratio method of FNS and SPS. A global model for pure nitrogen in PLASIMO uses the experimentally determined E/N distribution to draw a picture of the gas kinetics around the space charge layer passage. In addition, the results of the global model serve as a reference to interpret the rotational and vibrational temperatures obtained from experimental FNS and SPS emissions.

Název v anglickém jazyce

High-resolution electric field and temperature distributions in positive streamers

Popis výsledku anglicky

In this work, we aim to take a detailed experimental picture of the positive streamer. We apply optical emission spectroscopy to the first negative system (FNS, (Formula presented.)) of (Formula presented.) and the second positive system (SPS, C3Πu → B3Πg) of N2. Large, centimeter wide, and highly reproducible streamers are created in pure nitrogen and synthetic air, at pressures ranging from 33 to 266 mbar. Direct time resolved spectral imaging of the space charge layer resulted in spatiotemporal maps of the calculated reduced electric field strength (E/N) and rovibrational temperature in sub-nanosecond and sub-millimetre resolution. The E/N peaks at approximately 540 and 480 Td, directly in front of the space charge layer, for synthetic air and pure nitrogen respectively, as determined by using the intensity ratio method of FNS and SPS. A global model for pure nitrogen in PLASIMO uses the experimentally determined E/N distribution to draw a picture of the gas kinetics around the space charge layer passage. In addition, the results of the global model serve as a reference to interpret the rotational and vibrational temperatures obtained from experimental FNS and SPS emissions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/GA21-16391S" target="_blank" >GA21-16391S: Pokročilé metody pro ultrarychlou diagnostiku přechodného argon obsahujícího plazmatu</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Frontiers in Physics

ISSN

2296-424X

e-ISSN

2296-424X

Svazek periodika

11

Číslo periodika v rámci svazku

April

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

15

Strana od-do

1120284

Kód UT WoS článku

000973436900001

EID výsledku v databázi Scopus

2-s2.0-85153537344