ATMOSPHERIC ELECTRICITY AND GEOPHYSICAL OPERATIONS

Geophysics ◽  
1955 ◽  
Vol 20 (3) ◽  
pp. 638-653
Author(s):  
Glenn W. Fordham
Keyword(s):  
Corona Discharge ◽  
Discharge Current ◽  
Atmospheric Electricity ◽  
High Potential ◽  
Safety Hazards ◽  
High Gradients ◽  
Stormy Weather ◽  
Potential Gradients

The safety hazards of lightning to seismic crews using explosives are well known. Lightning is a result of high potential gradients in the atmosphere. These high gradients, which accompany stormy weather, can be detected by measuring the corona‐discharge current from a sharp metal point called a point collector. Oscillograms of point‐collector currents taken during thunderstorms may be a definite aid to field personnel in determining when lightning is imminent. Many more data are needed. It is hoped that others in the industry will take similar measurements and pool the data thus obtained.

scholarly journals Corona Discharge Properties Near Metal and Dielectric Surface

2020 ◽  
Vol 9 (3) ◽  
pp. 3662-3665
Keyword(s):  
Sulfuric Acid ◽  
Corona Discharge ◽  
Discharge Current ◽  
Ferrous Metal ◽  
Dielectric Surface ◽  
Electrical Characteristics ◽  
Corona Discharges ◽  
Industrial Gases ◽  
The Creation ◽  
Discharge Method

This following research of the properties of a coronary discharge has a serious impact on the study of metallurgy. There are a lot of cases of practical use of the corona discharge functions. An example is the creation of electrostatic precipitators for the purification of industrial gases from solid and liquid particles. Using the corona discharge method, for example, smoke is cleaned in the production of sulfuric acid, air in non-ferrous metal foundries and other harmful industries. Shape of the corona discharge made utilizing cone shaped and round and hollow terminals was examined. The most electrical characteristics of discharge of this type are decided. Corona discharges are characterized by weak currents within the extend of one microampere at voltages on the arrange of 10 kilovolts and adequately week gleam discharge. Electric fluctuations within the discharge current circuit within the extend 1 kHz-120 MHz are enlisted. To think about the oscillatory forms, there were used electric and attractive tests, signals from which were sent to the Tektronix TDS 2024B oscilloscope working within the frequency analyzer mode. The electrical tests were spoken to by metal poles 1-10 cm in length and 4-5 mm in diameter. As magnetic tests, there were used coils (diameter 2-4 mm, number of turns 70-140, wire thickness 0.1 mm) set in protective dielectric walled in areas. These tests were located at a separate of 0.5-1.0 m from the release. Possible waves in plasma are suggested to explain these oscillations.

scholarly journals The interchange of electricity between thunderclouds and the Earth

1928 ◽  
Vol 118 (779) ◽  
pp. 252-262 ◽  
Keyword(s):  
Electric Fields ◽  
Negative Charge ◽  
Atmospheric Electricity ◽  
Outstanding Problem ◽  
The Earth ◽  
Fine Weather ◽  
Lightning Discharges ◽  
Point Discharge ◽  
Potential Gradients ◽  
Strong Electric Fields

Prof. C. T. R. Wilson has suggested that the exchange of electricity between thunderclouds and the ground may be an important factor in the maintenance of the earth’s negative charge, the replenishment of which, in view of the fine-weather air-earth current, is an outstanding problem in atmospheric electricity. He has shown that such an exchange can take place in three ways, by the momentary currents due to lightning discharges between the cloud and the ground, by the convection currents carried by rain, and by the continuous currents carried by ions moving in the powerful electric fields below the cloud. This last effect may be expected to be considerable since such ions will be produced in quantity as a result of point-discharges from trees and bushes below the cloud. In the present paper an attempt is made to estimate the magnitudes of these three factors in the exchange. Before describing the measurements, it may be recalled that in two studies of the strong electric fields below these clouds, it has been found that negative potential gradients are very much more frequent and considerably stronger than positive ones. Indeed, occasions of strong positive fields below active thunderclouds are so rare as to be negligible, and the predominance of strong negative fields must cause the point-discharge currents to be mainly upwardly directed. The earth must therefore gain a negative charge from this effect.

Study on Bipolar Corona Discharge in Emitting Needle Electrode Configuration

2008 ◽  
Vol 11 (1) ◽  
Author(s):  
Haifeng Chen ◽  
Penghao Su ◽  
Shu Yang ◽  
Yimin Zhu
Keyword(s):  
Corona Discharge ◽  
Discharge Current ◽  
Experimental Results ◽  
Electrode Configuration ◽  
Needle Electrode ◽  
Discharge Electrode ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Spectrum Characteristics

AbstractThis paper systematically studied the current-voltage characteristics and the spectrum characteristics of bipolar corona discharge in multi-needle electrode configuration, and determined the optimized space between electrodes. The experimental results show that the discharge current I decreases with an increase in the needle radius a or the space between electrodes d, and increases with an increase in the space between needles s. Due to the symmetry of the discharge electrode configuration, the polarity of the HV electrode has no obvious influence on the discharge. Using the method of OES for measuring N

scholarly journals Электроотрицательные добавки как способ повышения эффективности использования тока разряда при конверсии летучих органических соединений

2020 ◽  
Vol 46 (3) ◽  
pp. 10
Author(s):  
Д.Л. Кузнецов ◽  
И.Е. Филатов ◽  
В.В. Уварин
Keyword(s):  
Energy Efficiency ◽  
Carbon Tetrachloride ◽  
Corona Discharge ◽  
Discharge Current ◽  
Pulsed Corona Discharge ◽  
Nanosecond Duration ◽  
Pulsed Corona

The effect of electronegative additives on the conversion of toxic impurities in plasma of air mixtures was studied. Using the example of the conversion of trichloroethylene C2HCl3 in air under the influence of pulsed corona discharge of nanosecond duration, it was shown that the addition of carbon tetrachloride CCl4 to the mixture leads not only to a decrease in the discharge current, but also to an increase in energy efficiency of the conversion of C2HCl3. The analysis of processes in various areas of the corona discharge is carried out.

scholarly journals “Electrical wind” in CO2–laser mixtures at superatmospheric pressures

2021 ◽  
Vol 2064 (1) ◽  
pp. 012026
Author(s):  
B A Kozlov ◽  
D S Makhanko
Keyword(s):  
Carbon Dioxide ◽  
Chemical Composition ◽  
Corona Discharge ◽  
Flow Velocity ◽  
Wind Velocity ◽  
Discharge Current ◽  
Gas Flow ◽  
Molecular Nitrogen ◽  
Unipolar Corona Discharge ◽  
Gas Flow Velocity

Abstract This article presents the results of “electrical wind” investigations in CO2–laser mixtures at superatmospheric (1–12 atm) pressures. It is established that for a fixed value of the unipolar corona discharge current, the gas flow velocity does not depend on the pressure, but is determined by the chemical composition of the working mixture. The maximum values of the “electrical wind” velocity are achieved in carbon dioxide and molecular nitrogen and their values are 3.2 and 2.9 ms−1. In typical laser mixtures CO2:N2:He = 1:1:1 – 1:1:3 the velocity of the “electrical wind ” are in the range from 2.5 to 1.5 ms−.

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