Particle Charging in DC Corona Fields
After a brief review of the currently accepted theory of particle charging in corona fields in air by both ionic bombardment and diffusion in the dark space surrounding the dc corona glow, the paper presents some of the recently published findings on particle charging within the corona glow. The study was made possible by the discovery that additions of CO2 to air in a 5 to 20% range will increase a cylindrical positive corona glow to a size which is sufficiently large to allow particles to be dropped on to various trajectories parallel to the corona wire and their charge to be measured. The influence of the shape of the particles when exposed to corona charging is also discussed.
Corona “impedance” in a pin-to-plane geometry
Abstract Our work focuses on the analysis of binary hydrocarbon mixtures, namely cyclopentane, 1-pentene and pentane. The purpose is to describe, analyze, and model the conduction properties of selected hydrocarbons, as well as to find a method for modifying the composition of hydrocarbon mixtures in order to obtain the desired discharge properties. Data analysis is performed in terms of the corona “ impedance ” of the discharge medium. In a logarithmic coordinate system, experimental data show a first-order dependence of the corona “ impedance ” of the electrode gap on the corona current, which appears to be more general in nature. Starting from a conic approximation of the geometry of the effective discharge area, we have derived a model where the mentioned linearity can be reduced to an expression that closely matches experimental data.
Electrical Engineers' Handbook
AbstractELECTRICAL engineers' handbooks have become both bulky and inconvenient, and contain much duplicated matter owing to the rapid development of the various branches of engineering. In this series it has been decided to publish the fundamental material which forms the basis of all engineering in a separate volume, and the existing handbooks as they are revised are being issued in several volumes containing material closely connected with the specialized branch considered. The entire new series of handbooks will give much more complete information on all topics of interest to engineers.Electrical Engineers' Handbook
 (Vols. 4 and 5 of Wiley Engineering Handbook Series.) 4: Electric Power. Prepared by a Staff of Specialists under the Editorship of Dr. Harold Pender William A. Del Mar Knox McIlwain. Third edition rewritten. Pp. xiv + 1268 + 37. (New York: John Wiley and Sons, Inc.; London: Chapman and Hall, Ltd., 1936.) 30s. net.