Point-to-plane corona: current-voltage characteristics for positive and negative polarity with evidence of an electronic component

A series of measurements carried out with the point‐to‐plane symmetry has shown that positive corona confirms the Townsend relation while for the negative corona this happens only at large point‐to‐plane distances (greater than 1.5 cm). In this case, the ratio of the prefactors in Townsend relation, for the same geometry, approaches the expected constant (the ratio of the mobilities) at larger distances, around 6 cm. For distances below 1.5 cm, the square root of the current is linear with the voltage, with an intercept of ∼1.4 kV. The results are interpreted as giving evidence of an electronic component at small distances, as suggested by Sigmond. The characteristics change to Townsend at higher distances when the electronic component becomes small as compared with the ionic one.

[1]  J. Meek,et al.  Electrical breakdown of gases , 1953 .

[2]  C. Gallo,et al.  Systematic study of the electrical characteristics of the ``Trichel'' current pulses from negative needle‐to‐plane coronas , 1974 .

[3]  E. Nasser.  Fundamentals of gaseous ionization and plasma electronics , 1971 .

[4]  A. Kip.  Positive-Point-to-Plane Discharge in Air at Atmospheric Pressure , 1938 .

[5]  R. S. Sigmond.  Simple approximate treatment of unipolar space‐charge‐dominated coronas: The Warburg law and the saturation current , 1982 .

[6]  B. Gross,et al.  Measurement of potential buildup and decay, surface charge density, and charging currents of corona‐charged polymer foil electrets , 1976 .

[7]  W. N. English.  Positive and Negative Point-to-Plane Corona in Air , 1948 .

[8]  Harry J. White,et al.  Industrial Electrostatic Precipitation , 1963 .

[9]  Thomas F. Hayne.  Screen Controlled Corona Device (Scorotron) for Charging in a Xerographic Copier , 1976, IEEE Transactions on Industry Applications.

[10]  A. F. Kip,et al.  Electrical Discharges in Air at Atmospheric Pressure The Nature of the Positive and Negative Point‐to‐Plane Coronas and the Mechanism of Spark Propagation , 1939 .

[11]  A derivation of Warburg’s law for point to plane coronas , 1981 .

[12]  A. Kip,et al.  Pulses in Negative Point-to-Plane Corona , 1941 .

[13]  Lawrence H. Luessen,et al.  Electrical Breakdown and Discharges in Gases , 1983 .

[14]  A. D. Moore.  Electrostatics and its applications , 1973 .

[15]  C. Gallo,et al.  Corona-A Brief Status Report , 1977, IEEE Transactions on Industry Applications.

[16]  J. Townsend,et al.  Electricity in gases , 2022 .

[17]  G. W. Trichel.  The Mechanism of the Positive Point-to-Plane Corona in Air at Atmospheric Pressure , 1939 .

[18]  G. L. Weissler.  Positive and Negative Point-to-Plane Corona in Pure and Impure Hydrogen, Nitrogen, and Argon , 1943 .