| Definition: | a discharge with slight luminosity produced in the neighbourhood of a conductor, without greatly heating it, and limited to the region surrounding the conductor in which the electric field exceeds a certain value
NOTE – In a corona stabilizer tube, this usually occurs in a high-voltage, low-current (of the order of microamperes) region, between two unheated electrodes immersed in a gas at a pressure above a few millimetres of mercury.
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