Note: Atmospheric point discharge current measurements using a temperature-compensated logarithmic current amplifier

G. J. Marlton; R. G. Harrison; K. A. Nicoll

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Note: Atmospheric point discharge current measurements using a temperature-compensated logarithmic current amplifier

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Measurements of atmospheric corona currents have been made for over 100 years to indicate the atmospheric electric field. Corona currents vary substantially, in polarity and in magnitude. The instrument described here uses a sharp point sensor connected to a temperature compensated bi-polar logarithmic current amplifier. Calibrations over a range of currents from ±10 fA to ±3 μA and across ±20℃ show it has an excellent logarithmic response over six orders of magnitude from 1 pA to 1 μA in both polarities for the range of atmospheric temperatures likely to be encountered in the southern UK. Comparison with atmospheric electric field measurements during disturbed weather confirms that bipolar electric fields induce corona currents of corresponding sign, with magnitudes ～0.5 μA.

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《Review of Scientific Instruments》 |2013年第6期|066103-1-066103-3|共3页
作者
G. J. Marlton; R. G. Harrison; K. A. Nicoll;
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Department of Meteorology, University of Reading, United Kingdom;

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正文语种英语
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Note: Atmospheric point discharge current measurements using a temperature-compensated logarithmic current amplifier

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