J 2017

Diagnostics of pre-breakdown light emission in a helium coplanar barrier discharge: the presence of neutral bremsstrahlung

NAVRÁTIL, Zdeněk, Tomáš MORÁVEK, Jozef RÁHEĽ, Jan ČECH, Ondřej LALINSKÝ et. al.

Basic information

Original name

Diagnostics of pre-breakdown light emission in a helium coplanar barrier discharge: the presence of neutral bremsstrahlung

Authors

NAVRÁTIL, Zdeněk (203 Czech Republic, guarantor, belonging to the institution), Tomáš MORÁVEK (703 Slovakia, belonging to the institution), Jozef RÁHEĽ (703 Slovakia, belonging to the institution), Jan ČECH (203 Czech Republic, belonging to the institution), Ondřej LALINSKÝ (203 Czech Republic) and David TRUNEC (203 Czech Republic, belonging to the institution)

Edition

Plasma Sources Science and Technology, Bristol, England, IOP PUBLISHING LTD, 2017, 0963-0252

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10305 Fluids and plasma physics

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 3.939

RIV identification code

RIV/00216224:14310/17:00094727

Organization unit

Faculty of Science

DOI

UT WoS

000400097000001

Keywords in English

dielectric barrier discharge; helium; single photon counting; bremsstrahlung; electric

Tags

Tags

International impact, Reviewed
Změněno: 1/4/2018 09:24, Ing. Nicole Zrilić

Abstract

V originále

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.

Links

ED2.1.00/03.0086, research and development project
Name: Regionální VaV centrum pro nízkonákladové plazmové a nanotechnologické povrchové úpravy
GA13-24635S, research and development project
Name: Spektroskopické studium rekombinace povrchového náboje v dielektrických bariérových výbojích
Investor: Czech Science Foundation
LO1411, research and development project
Name: Rozvoj centra pro nízkonákladové plazmové a nanotechnologické povrchové úpravy (Acronym: CEPLANT plus)
Investor: Ministry of Education, Youth and Sports of the CR