Spatially and temporally resolved electron density measurements in streamers in dielectric liquids
(1997) In Journal of Physics D: Applied Physics 30(5). p.856-863- Abstract
- Spatially and temporally resolved spectroscopic measurements of light emitted from positive streamers in transformer oil are presented. Analyses of the measurements performed with a DC needle-plane gap yield electron densities and indications of the atomic excitation temperatures in the streamers. The hydrogen emission reveals an electron density below 10(16) cm(-3) during the main part of the streamer propagation time (80-90%). Later the light is also characterized by emission from a high-density plasma with electron densities in the range 10(18)-10(19) cm(-3). The electron density during this time increases approximately linearly with distance from the initiation point and a density factor of four higher has been measured at the streamer... (More)
- Spatially and temporally resolved spectroscopic measurements of light emitted from positive streamers in transformer oil are presented. Analyses of the measurements performed with a DC needle-plane gap yield electron densities and indications of the atomic excitation temperatures in the streamers. The hydrogen emission reveals an electron density below 10(16) cm(-3) during the main part of the streamer propagation time (80-90%). Later the light is also characterized by emission from a high-density plasma with electron densities in the range 10(18)-10(19) cm(-3). The electron density during this time increases approximately linearly with distance from the initiation point and a density factor of four higher has been measured at the streamer tip than at the root. Measurements with high spectral resolution detect both high and low electron densities simultaneously. A tentative model of the interior of the streamer plasma, spatially resolved, is presented. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2257416
- author
- Barmann, P ; Kröll, Stefan LU and Sunesson, A
- organization
- publishing date
- 1997
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Physics D: Applied Physics
- volume
- 30
- issue
- 5
- pages
- 856 - 863
- publisher
- IOP Publishing
- external identifiers
-
- scopus:0031557358
- ISSN
- 1361-6463
- DOI
- 10.1088/0022-3727/30/5/018
- language
- English
- LU publication?
- yes
- id
- 8e6d1624-0c74-4e08-aca1-ea0914c0158c (old id 2257416)
- date added to LUP
- 2016-04-04 09:40:52
- date last changed
- 2022-01-29 19:04:57
@article{8e6d1624-0c74-4e08-aca1-ea0914c0158c,
abstract = {{Spatially and temporally resolved spectroscopic measurements of light emitted from positive streamers in transformer oil are presented. Analyses of the measurements performed with a DC needle-plane gap yield electron densities and indications of the atomic excitation temperatures in the streamers. The hydrogen emission reveals an electron density below 10(16) cm(-3) during the main part of the streamer propagation time (80-90%). Later the light is also characterized by emission from a high-density plasma with electron densities in the range 10(18)-10(19) cm(-3). The electron density during this time increases approximately linearly with distance from the initiation point and a density factor of four higher has been measured at the streamer tip than at the root. Measurements with high spectral resolution detect both high and low electron densities simultaneously. A tentative model of the interior of the streamer plasma, spatially resolved, is presented.}},
author = {{Barmann, P and Kröll, Stefan and Sunesson, A}},
issn = {{1361-6463}},
language = {{eng}},
number = {{5}},
pages = {{856--863}},
publisher = {{IOP Publishing}},
series = {{Journal of Physics D: Applied Physics}},
title = {{Spatially and temporally resolved electron density measurements in streamers in dielectric liquids}},
url = {{https://lup.lub.lu.se/search/files/5388937/2297026.pdf}},
doi = {{10.1088/0022-3727/30/5/018}},
volume = {{30}},
year = {{1997}},
}