J 2016

Electric field development in gamma-mode radiofrequency atmospheric pressure glow discharge in helium

NAVRÁTIL, Zdeněk, Raavo JOSEPSON, Nikola CVETANOVIC, Bratislav OBRADOVIČ, Pavel DVOŘÁK et. al.

Basic information

Original name

Electric field development in gamma-mode radiofrequency atmospheric pressure glow discharge in helium

Name in Czech

Vývoj elektrického pole v radiofrekvenčním výboji za atmosférického tlaku v gama-módu v heliu

Authors

NAVRÁTIL, Zdeněk (203 Czech Republic, guarantor, belonging to the institution), Raavo JOSEPSON (233 Estonia, belonging to the institution), Nikola CVETANOVIC (688 Serbia), Bratislav OBRADOVIČ (688 Serbia) and Pavel DVOŘÁK (203 Czech Republic, belonging to the institution)

Edition

Plasma Sources Science and Technology, BRISTOL, IOP Pub. 2016, 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: 3.302

RIV identification code

RIV/00216224:14310/16:00087866

Organization unit

Faculty of Science

UT WoS

000376557400001

Keywords in English

radiofrequency discharge;atmospheric pressure;electric field;helium

Tags

Tags

International impact, Reviewed
Změněno: 13/3/2018 10:59, doc. Mgr. Zdeněk Navrátil, Ph.D.

Abstract

V originále

Time development of electric field strength during radio-frequency sheath formation was measured using Stark polarization spectroscopy in a helium gamma-mode radio-frequency (RF, 13.56 MHz) atmospheric pressure glow discharge at high current density (3 A cm-2). A method of time-correlated single photon counting was applied to record the temporal development of spectral profile of He I 492.2 nm line with a sub-nanosecond temporal resolution. By fitting the measured profile of the line with a combination of pseudo-Voigt profiles for forbidden (2 1P-4 1F) and allowed (2 1P-4 1D) helium lines, instantaneous electric fields up to 32 kV cm-1 were measured in the RF sheath. The measured electric field is in agreement with the spatially averaged value of 40 kV cm-1 estimated from homogeneous charge density RF sheath model. The observed rectangular waveform of the electric field time development is attributed to increased sheath conductivity by the strong electron avalanches occurring in the gamma-mode sheath at high current densities.

Links

ED2.1.00/03.0086, research and development project
Name: Regionální VaV centrum pro nízkonákladové plazmové a nanotechnologické povrchové úpravy
EE2.3.30.0009, research and development project
Name: Zaměstnáním čerstvých absolventů doktorského studia k vědecké excelenci
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