Number of the records: 1
Diagnostics of pre-breakdown light emission in a helium coplanar barrier discharge: the presence of neutral bremsstrahlung
- 1.
SYSNO ASEP 0481408 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Diagnostics of pre-breakdown light emission in a helium coplanar barrier discharge: the presence of neutral bremsstrahlung Author(s) Navrátil, Z. (CZ)
Morávek, T. (CZ)
Ráhel’, J. (CZ)
Čech, J. (CZ)
Lalinský, Ondřej (UPT-D) RID, ORCID, SAI
Trunec, D. (CZ)Number of authors 6 Article number 055025 Source Title Plasma Sources Science & Technology. - : Institute of Physics Publishing - ISSN 0963-0252
Roč. 26, č. 5 (2017), s. 1-10Number of pages 10 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords dielectric barrier discharge ; helium ; single photon counting ; bremsstrahlung ; electric field ; backward discharge ; surface charge Subject RIV JA - Electronics ; Optoelectronics, Electrical Engineering OECD category Fluids and plasma physics (including surface physics) Institutional support UPT-D - RVO:68081731 UT WOS 000400097000001 EID SCOPUS 85018252699 DOI 10.1088/1361-6595/aa66b5 Annotation Weak light emission (similar to 10(-3) of active discharge signal, average count rate similar to 1 photon s(-1) nm(-1)) associated with surface charge relaxation during the dark phase of a helium diffuse coplanar barrier discharge was studied by optical emission spectroscopy, using a technique of phase-resolved single photon counting. The optical emission spectra of the dark phase contained luminescent bands of the dielectrics used (Al2O3, AlN) and spectral lines from the gas constituents (OH*, N-2*, N-2(+)*, He*, He-2*, O*). During the charge relaxation event, a broad continuum appeared in the optical emission spectra, consisting of bremsstrahlung radiation and amplified luminescence of the dielectric barrier. The analysis presented suggests that the bremsstrahlung radiation originated from slow electrons colliding with neutral helium atoms. The fitting procedure we developed reproduced well the observed shape of the continuum. Moreover, it provided a method for the determination of electric field strength in the discharge during this particular phase. The electric field reached 1 kV cm(-1) during the charge relaxation event. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2018
Number of the records: 1