Streamer-induced kinetics of excited states in pure N2: I. Propagation velocity, E / N and vibrational distributions of N2(C3Πu) and N2+(B2Σu+) states
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F23%3A00580536" target="_blank" >RIV/61389021:_____/23:00580536 - isvavai.cz</a>
Result on the web
<a href="https://iopscience.iop.org/article/10.1088/1361-6595/acf9c8" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6595/acf9c8</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1361-6595/acf9c8" target="_blank" >10.1088/1361-6595/acf9c8</a>
Alternative languages
Result language
angličtina
Original language name
Streamer-induced kinetics of excited states in pure N2: I. Propagation velocity, E / N and vibrational distributions of N2(C3Πu) and N2+(B2Σu+) states
Original language description
The emission spectra of a streamer discharge in pure nitrogen provide an important tool for investigating the fundamental kinetics of excited electronic states of N2 and benchmark data for validating advanced kinetic schemes for numerical models. In this work, we characterize a streamer monofilament developed in a dielectric barrier discharge configuration, including electrical characteristics, time-resolved images and N2/N 2+ emission spectra, all acquired with nanosecond temporal resolution. Time-resolved images and emission characteristics provide clear evidence of the formation of a cathode-directed streamer and allow determining the streamer propagation velocity and the typical E/N values using the intensity ratio of nitrogen spectral bands in the center of the discharge gap. We also measure the vibrational distributions of the N-2(C-3 Pi(u) , nu= 0-4) and N-2(+) (B-2 Sigma(+)(u) , nu= 0-2) states. The population of N-2(C-3 Pi u , nu= 0-4) state, initially formed by energetic electrons in the streamer head, changes later significantly due to the decrease in the mean energy and concentration of the streamer channel electrons. After a few tens of nanoseconds, the electron-impact excitation rate of N-2(C3 Pi(u) ) becomes negligible compared to its population by the N-2( A(3)Sigma(+)(u) ) + N-2( A(3)Sigma(+)(u) ) pooling. The experimental findings are supported and consistent with the 0D state-to-state kinetic model results and reveal the participation of high vibrational levels of N-2(A(3)Sigma(+)(u) ) in the pooling reactions.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
<a href="/en/project/GA15-04023S" target="_blank" >GA15-04023S: Advanced Research of Kinetic Processes in Streamer Discharges</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Plasma Sources Science & Technology
ISSN
0963-0252
e-ISSN
1361-6595
Volume of the periodical
32
Issue of the periodical within the volume
10
Country of publishing house
US - UNITED STATES
Number of pages
19
Pages from-to
105002
UT code for WoS article
001084363500001
EID of the result in the Scopus database
2-s2.0-85175004211