Abstract
Corona light in coaxial cylindrical electrodes is measured photoelectrically and photographically. Calculations are made in the space charge field. Calculated intensity of the light emission within the corona sheath decreases steeply as the distance from the surface of the central electrode increases. The logarithmic gradient near the central electrode and near the outer boundary of the sheath is larger than that in the intermediate portion. The thickness of the corona sheath is independent of applied voltage. The thickness is 0.62, 1.01, 1.57 and 2.00 mm for a central electrode 0.25, 0.5, 1.0 and 1.5 mm in radius, respectively. These values can be expressed as 1.56r00.65, where r0 is the radius of the central electrode in mm. The peak level of the measured brightness distribution curve is more than 103 times higher than the skirt level.
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