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X-rays from negative laboratory sparks in air: Influence of the anode geometry
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity. (Åskforskning)
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity. (Åskforskning)
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity. (Åskforskning)
Univ New Hampshire, Inst Study Earth Oceans & Space, Morse Hall,8 Coll Rd, Durham, NH 03824 USA..
2017 (English)In: Journal of Atmospheric and Solar-Terrestrial Physics, ISSN 1364-6826, E-ISSN 1879-1824, Vol. 154, 190-194 p.Article in journal (Refereed) Published
Abstract [en]

In this experimental work, the influence of the grounded anode geometry is studied on the X-ray production from the laboratory sparks in air at atmospheric pressure when a negative impulse voltage is applied to a high voltage rod which served as a cathode. The result shows that the smaller the diameter of the anode, the higher the energy of X-ray bursts. This observation can be explained by the mechanism that the encounter of negative and positive streamer fronts just before the final breakdown is the event that accelerates electrons to X-ray generating energies, but may not be the only mechanism that generates X-rays.

Place, publisher, year, edition, pages
2017. Vol. 154, 190-194 p.
Keyword [en]
X-rays, laboratory sparks, electrodes, runaway electrons
National Category
Meteorology and Atmospheric Sciences Engineering and Technology
Research subject
Engineering Science with specialization in Atmospheric Discharges
Identifiers
URN: urn:nbn:se:uu:diva-268859DOI: 10.1016/j.jastp.2016.07.012ISI: 000395952000019OAI: oai:DiVA.org:uu-268859DiVA: diva2:881330
Funder
Swedish Research Council, 621-2012-3300
Available from: 2015-12-10 Created: 2015-12-10 Last updated: 2017-04-25Bibliographically approved

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Hettiarachchi, PasanRahman, MahbuburCooray, Vernon

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