Počet záznamů: 1
Diagnostics of pre-breakdown light emission in a helium coplanar barrier discharge: the presence of neutral bremsstrahlung
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SYSNO ASEP 0481408 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Diagnostics of pre-breakdown light emission in a helium coplanar barrier discharge: the presence of neutral bremsstrahlung Tvůrce(i) Navrátil, Z. (CZ)
Morávek, T. (CZ)
Ráhel’, J. (CZ)
Čech, J. (CZ)
Lalinský, Ondřej (UPT-D) RID, ORCID, SAI
Trunec, D. (CZ)Celkový počet autorů 6 Číslo článku 055025 Zdroj.dok. Plasma Sources Science & Technology. - : Institute of Physics Publishing - ISSN 0963-0252
Roč. 26, č. 5 (2017), s. 1-10Poč.str. 10 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova dielectric barrier discharge ; helium ; single photon counting ; bremsstrahlung ; electric field ; backward discharge ; surface charge Vědní obor RIV JA - Elektronika a optoelektronika, elektrotechnika Obor OECD Fluids and plasma physics (including surface physics) Institucionální podpora UPT-D - RVO:68081731 UT WOS 000400097000001 EID SCOPUS 85018252699 DOI 10.1088/1361-6595/aa66b5 Anotace 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. Pracoviště Ústav přístrojové techniky Kontakt Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Rok sběru 2018
Počet záznamů: 1