Experiments on how photo- and background ionization affect positive streamers: oxygen concentration, repetition and radioactivity

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

Samenvatting

Positive streamers in air and other oxygen-nitrogen mixtures are generally believed to propagate against the electron drift direction due to photo-ionization. Photo-ionization is the non-local ionization of O2-molecules by UV radiation from excited N2-molecules. This facilitates the streamer propagation by creating free electrons ahead of it. The relative importance of photo-ionization depends on the O2/N2 ratio. Another possible source of free electrons in front of the positive streamer is background ionization. This can be ionization left by previous discharges or by other processes such as cosmic rays or (natural) radio-activity. We study the effects of both photo- and background-ionization on propagation and morphology of positive streamers by changing gas composition and repetition frequency. One particular gas composition is pure nitrogen with a small amount of radio-active 85Kr added to increase background ionization.
Originele taal-2Engels
TitelProceedings of the 30th International Conference on Phenomena in Ionized Gases (ICPIG 2011), August 28th- September 2nd, 2011, Belfast, UK
Pagina'sC10-1/4
StatusGepubliceerd - 2011
Evenement30th International Conference on Phenomena in Ionized Gases (ICPIG 2011), August 28 - September 2, 2011, Belfast, UK - Belfast, Verenigd Koninkrijk
Duur: 28 aug 20112 sep 2011
http://www.qub.ac.uk/sites/icpig2011/

Congres

Congres30th International Conference on Phenomena in Ionized Gases (ICPIG 2011), August 28 - September 2, 2011, Belfast, UK
Verkorte titelICPIG 2011
LandVerenigd Koninkrijk
StadBelfast
Periode28/08/112/09/11
Ander30th International Conference on Phenomena in Ionized Gases (ICPIG 2011)
Internet adres

Vingerafdruk Duik in de onderzoeksthema's van 'Experiments on how photo- and background ionization affect positive streamers: oxygen concentration, repetition and radioactivity'. Samen vormen ze een unieke vingerafdruk.

Citeer dit