Detailed Information on Publication Record
2018
2D-resolved electric field development in helium coplanar DBD: spectrally filtered ICCD camera approach
ČECH, Jan, Zdeněk NAVRÁTIL, Michal ŠTIPL, Tomáš MORÁVEK, Jozef RÁHEĽ et. al.Basic information
Original name
2D-resolved electric field development in helium coplanar DBD: spectrally filtered ICCD camera approach
Authors
ČECH, Jan (203 Czech Republic, guarantor, belonging to the institution), Zdeněk NAVRÁTIL (203 Czech Republic, belonging to the institution), Michal ŠTIPL (203 Czech Republic, belonging to the institution), Tomáš MORÁVEK (703 Slovakia, belonging to the institution) and Jozef RÁHEĽ (703 Slovakia, belonging to the institution)
Edition
Plasma Sources Science and Technology, IOP Pub. 2018, 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: 4.128
RIV identification code
RIV/00216224:14310/18:00103748
Organization unit
Faculty of Science
UT WoS
000446883100001
Keywords in English
coplanar discharge; electric field; 2D; imaging; helium; ICCD
Tags
International impact, Reviewed
Změněno: 22/3/2021 19:03, doc. RNDr. Jozef Ráheľ, PhD.
Abstract
V originále
Electric field strength in diffuse coplanar barrier discharge in helium at atmospheric pressure, driven by AC voltage amplitude 1.5 kV, frequency 10 kHz), was measured by optical emission spectroscopy. Two helium singlet lines at 667.8 nm (He I) and 728.1 nm (He I) were recorded within the discharge space and period with a high spatial (20µm) and temporal (50ns) resolution and analysed with the line intensity ratio method developed by Ivković et al 2014. A novel experimental approach, based on a direct observation of the discharge by ICCD camera through two interference filters, was developed to obtain 2D spatially resolved distributions of the electric field. The obtained results proved the existence of several developing regions of high electric field, namely the cathode-directed and anode ionization waves. Electric field in the cathode directed wave peaked at 32kV/cm during the first contact of the wave with the cathode’s dielectrics, followed by decrease to values of 15–25kV/cm above the electrode. The electric field in anode directed wave was lower, reading some 15kV/cm. The performed ‘sensitivity analysis’ pointed out the crucial importance of precise temporal and spatial synchronization for the techniques based on intensity ratio of two spectral lines. Artificially introduced 50ns misalignment between the measured data of both spectral lines resulted in the substantial distortion of the electric field map. Reduction of the temporal resolution from 50ns to 100ns led to the decrease of electric field maxima by the 30 %. Reduction of the spatial resolution from 20µm to 40µm decreased the maximal field value by 10%.
Links
| LO1411, research and development project |
|