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@article{1379011,
author = {Navrátil, Zdeněk and Morávek, Tomáš and Ráheľ, Jozef and Čech, Jan and Lalinský, Ondřej and Trunec, David},
article_location = {Bristol, England},
article_number = {5},
doi = {http://dx.doi.org/10.1088/1361-6595/aa66b5},
keywords = {dielectric barrier discharge; helium; single photon counting; bremsstrahlung; electric},
language = {eng},
issn = {0963-0252},
journal = {Plasma Sources Science and Technology},
title = {Diagnostics of pre-breakdown light emission in a helium coplanar barrier discharge: the presence of neutral bremsstrahlung},
url = {http://iopscience.iop.org/article/10.1088/1361-6595/aa66b5},
volume = {26},
year = {2017}
}
TY - JOUR
ID - 1379011
AU - Navrátil, Zdeněk - Morávek, Tomáš - Ráheľ, Jozef - Čech, Jan - Lalinský, Ondřej - Trunec, David
PY - 2017
TI - Diagnostics of pre-breakdown light emission in a helium coplanar barrier discharge: the presence of neutral bremsstrahlung
JF - Plasma Sources Science and Technology
VL - 26
IS - 5
SP - nestránkováno
EP - nestránkováno
PB - IOP PUBLISHING LTD
SN - 09630252
KW - dielectric barrier discharge
KW - helium
KW - single photon counting
KW - bremsstrahlung
KW - electric
UR - http://iopscience.iop.org/article/10.1088/1361-6595/aa66b5
L2 - http://iopscience.iop.org/article/10.1088/1361-6595/aa66b5
N2 - Weak light emission (~10-3 of active discharge signal; average count rate ~ 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*, N2*, N2+*, He*, He2*, 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.
ER -
NAVRÁTIL, Zdeněk, Tomáš MORÁVEK, Jozef RÁHEĽ, Jan ČECH, Ondřej LALINSKÝ and David TRUNEC. Diagnostics of pre-breakdown light emission in a helium coplanar barrier discharge: the presence of neutral bremsstrahlung. \textit{Plasma Sources Science and Technology}. Bristol, England: IOP PUBLISHING LTD, 2017, vol.~26, No~5, p.~nestránkováno, 10 pp. ISSN~0963-0252. Available from: https://dx.doi.org/10.1088/1361-6595/aa66b5.
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