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dc.contributor.authorMontañá Puig, Juan
dc.contributor.authorVan der Velde, Oscar Arnoud
dc.contributor.authorMarch Nomen, Víctor
dc.contributor.authorRomero Durán, David
dc.contributor.authorSolà de las Fuentes, Glòria
dc.contributor.authorPineda Rüegg, Nicolau
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Elèctrica
dc.identifier.citationMontaña, J. [et al.]. High-speed video of lightning and x-ray pulses during the 2009–2010 observation campaigns in northeastern Spain. "Atmospheric research", 01 Novembre 2012, vol. 117, p. 91-98.
dc.description.abstractThis paper summarizes results obtained by the 2009–2010 field campaigns conducted in northeastern Spain using a high speed camera, VHF interferometer, VLF lightning location system and scintillation detectors for energetic radiation. The main purpose was to obtain new insight into the lightning processes which emit x/γ radiation. For just one (very close) lightning strike, 99 x-ray pulses were emittedwithin 0.86 ms and had an energy higher that 10 keV. This burst was associated with the final stages of a downward negative leader. The high-speed camera data also allowed to identify various previously unreported features in different types of cloud-to-ground lightning flashes. At video frame rates of 10,000 fps, some branches of negative leaders of cloud-to-ground flashes were illuminated for the duration of only one frame. During positive cloud-to-ground flashes, the high speed videos showed an intense activity of recoil leaders. In the case of intra-cloud lightning, the VHF interferometer network did not present a clear relation between detections and visible leader. Instead, bursts of VHF detections corresponded visually to a long-lasting bright channel under the cloud base
dc.format.extent8 p.
dc.subjectÀrees temàtiques de la UPC::Energies::Energia elèctrica
dc.titleHigh-speed video of lightning and x-ray pulses during the 2009–2010 observation campaigns in northeastern Spain
dc.subject.lemacRaigs X
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (published version)
local.citation.authorMontaña, J.; Van der Velde, O.; March, V.; Romero, D.; Solà, G.; Pineda, N.
local.citation.publicationNameAtmospheric research

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