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Author Robledo-Martinez, A. ♦ Garcia-Villareal, L. A.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION TECHNOLOGY ♦ ACCELERATION ♦ AIR ♦ ANODES ♦ DIELECTRIC MATERIALS ♦ EMISSION ♦ EQUATIONS OF MOTION ♦ IMAGES ♦ PLATES ♦ REFLECTION ♦ SHEETS ♦ VELOCITY
Abstract Experiments made in a parallel-plate arrangement, where one of the plates is the ground plane and the other a positively charged dielectric sheet, show that at low air pressure the dielectric injects streamers onto the surrounding air. The similarities and differences between the streamers thus produced and those emitted from electrodes are discussed. The streamers here obtained were found to have diameters and speeds that are clearly dependent on pressure. Often the streamers were seen to decelerate markedly to the point of coming to a complete stop and on occasions even returning back to the dielectric they came from. The deceleration and the reflection of the streamers are attributed to a virtual anode created by the electrostatic image of the head's charge behind the ground plane. Field calculations performed corroborate this hypothesis. Through the use of an equation of motion of the positive head, it is then possible to obtain an estimate of the magnitude of its charge. The charge thus obtained was found to be in the 2.5–26 nC range.
ISSN 1070664X
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-03-15
Publisher Place United States
Journal Physics of Plasmas
Volume Number 23
Issue Number 3


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