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Characteristics of laser-triggered electric discharges in air

Akyuz, M; Rahman, M; Larsson, A; Cooray, V and Franke, Axel LU (2005) In IEEE Transactions on Dielectrics and Electrical Insulation 12(5). p.1060-1070
Abstract
An experiment of laser-triggered electric discharges has been conducted in a uniform background electric field. By focusing the beam of a pulsed Nd-YAG laser (wavelength 532 nm, pulse duration 5 ns) in a narrow (15 mm) plane-parallel air gap exposed to a dc voltage, streamer discharges and disruptive discharges were triggered.. The laser energy and the background electric field strength were varied in the ranges 0-180 mJ and 0.8-1.4 MV/m, respectively, and the laser plasma was induced either close to the anode, close to the cathode or mid-gap. From images of the electrode gap and from current measurements, the occurrence of and time to the streamer discharge and the disruptive discharge were determined. No distinct level was found of... (More)
An experiment of laser-triggered electric discharges has been conducted in a uniform background electric field. By focusing the beam of a pulsed Nd-YAG laser (wavelength 532 nm, pulse duration 5 ns) in a narrow (15 mm) plane-parallel air gap exposed to a dc voltage, streamer discharges and disruptive discharges were triggered.. The laser energy and the background electric field strength were varied in the ranges 0-180 mJ and 0.8-1.4 MV/m, respectively, and the laser plasma was induced either close to the anode, close to the cathode or mid-gap. From images of the electrode gap and from current measurements, the occurrence of and time to the streamer discharge and the disruptive discharge were determined. No distinct level was found of either the laser energy or the plasma energy for the transition from one discharge case to another, even if the general trend was that the energy required for a certain discharge case was reduced when increasing the background electric field. These and other observations make the method of laser triggering a less suitable method for studies of streamer initiation and streamer propagation, but revealed several interesting features of laser-triggered electric discharges. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
laser triggering, streamer inception, streamer-to-spark transition, laser-induced plasma
in
IEEE Transactions on Dielectrics and Electrical Insulation
volume
12
issue
5
pages
1060 - 1070
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • wos:000232639700018
  • scopus:28744433049
ISSN
1070-9878
DOI
10.1109/TDEI.2005.1522198
language
English
LU publication?
yes
id
8f4fd561-7f50-4fba-86d1-c146298151b0 (old id 218790)
date added to LUP
2007-08-07 10:44:19
date last changed
2017-07-30 04:35:34
@article{8f4fd561-7f50-4fba-86d1-c146298151b0,
  abstract     = {An experiment of laser-triggered electric discharges has been conducted in a uniform background electric field. By focusing the beam of a pulsed Nd-YAG laser (wavelength 532 nm, pulse duration 5 ns) in a narrow (15 mm) plane-parallel air gap exposed to a dc voltage, streamer discharges and disruptive discharges were triggered.. The laser energy and the background electric field strength were varied in the ranges 0-180 mJ and 0.8-1.4 MV/m, respectively, and the laser plasma was induced either close to the anode, close to the cathode or mid-gap. From images of the electrode gap and from current measurements, the occurrence of and time to the streamer discharge and the disruptive discharge were determined. No distinct level was found of either the laser energy or the plasma energy for the transition from one discharge case to another, even if the general trend was that the energy required for a certain discharge case was reduced when increasing the background electric field. These and other observations make the method of laser triggering a less suitable method for studies of streamer initiation and streamer propagation, but revealed several interesting features of laser-triggered electric discharges.},
  author       = {Akyuz, M and Rahman, M and Larsson, A and Cooray, V and Franke, Axel},
  issn         = {1070-9878},
  keyword      = {laser triggering,streamer inception,streamer-to-spark transition,laser-induced plasma},
  language     = {eng},
  number       = {5},
  pages        = {1060--1070},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Transactions on Dielectrics and Electrical Insulation},
  title        = {Characteristics of laser-triggered electric discharges in air},
  url          = {http://dx.doi.org/10.1109/TDEI.2005.1522198},
  volume       = {12},
  year         = {2005},
}