A Novel Interpretation of the Electromagnetic Fields of Lightning Return Strokes
Electric and/or magnetic fields are generated by stationary charges, uniformly moving charges and accelerating charges. These field components are described in the literature as static fields, velocity fields (or generalized Coulomb field) and radiation fields (or acceleration fields), respectively....
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-01-01
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| Series: | Atmosphere |
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| Online Access: | http://www.mdpi.com/2073-4433/10/1/22 |
| _version_ | 1828769654895542272 |
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| author | Vernon Cooray Gerald Cooray |
| author_facet | Vernon Cooray Gerald Cooray |
| author_sort | Vernon Cooray |
| collection | DOAJ |
| description | Electric and/or magnetic fields are generated by stationary charges, uniformly moving charges and accelerating charges. These field components are described in the literature as static fields, velocity fields (or generalized Coulomb field) and radiation fields (or acceleration fields), respectively. In the literature, the electromagnetic fields generated by lightning return strokes are presented using the field components associated with short dipoles, and in this description the one–to-one association of the electromagnetic field terms with the physical process that gives rise to them is lost. In this paper, we have derived expressions for the electromagnetic fields using field equations associated with accelerating (and moving) charges and separated the resulting fields into static, velocity and radiation fields. The results illustrate how the radiation fields emanating from the lightning channel give rise to field terms varying as 1 / r and 1 / r 2 , the velocity fields generating field terms varying as 1 / r 2 , and the static fields generating field components varying as 1 / r 2 and 1 / r 3 . These field components depend explicitly on the speed of propagation of the current pulse. However, the total field does not depend explicitly on the speed of propagation of the current pulse. It is shown that these field components can be combined to generate the field components pertinent to the dipole technique. However, in this conversion process the connection of the field components to the physical processes taking place at the source that generate these fields (i.e., static charges, uniformly moving charges and accelerating charges) is lost. |
| first_indexed | 2024-12-11T13:52:47Z |
| format | Article |
| id | doaj.art-e8eb8bf2e9c9483bb318d8dc6edea641 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-12-11T13:52:47Z |
| publishDate | 2019-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-e8eb8bf2e9c9483bb318d8dc6edea6412022-12-22T01:04:13ZengMDPI AGAtmosphere2073-44332019-01-011012210.3390/atmos10010022atmos10010022A Novel Interpretation of the Electromagnetic Fields of Lightning Return StrokesVernon Cooray0Gerald Cooray1Department of Engineering Sciences, Uppsala University, 752 37 Uppsala, SwedenKarolinska Institute, 171 77 stockholm, SwedenElectric and/or magnetic fields are generated by stationary charges, uniformly moving charges and accelerating charges. These field components are described in the literature as static fields, velocity fields (or generalized Coulomb field) and radiation fields (or acceleration fields), respectively. In the literature, the electromagnetic fields generated by lightning return strokes are presented using the field components associated with short dipoles, and in this description the one–to-one association of the electromagnetic field terms with the physical process that gives rise to them is lost. In this paper, we have derived expressions for the electromagnetic fields using field equations associated with accelerating (and moving) charges and separated the resulting fields into static, velocity and radiation fields. The results illustrate how the radiation fields emanating from the lightning channel give rise to field terms varying as 1 / r and 1 / r 2 , the velocity fields generating field terms varying as 1 / r 2 , and the static fields generating field components varying as 1 / r 2 and 1 / r 3 . These field components depend explicitly on the speed of propagation of the current pulse. However, the total field does not depend explicitly on the speed of propagation of the current pulse. It is shown that these field components can be combined to generate the field components pertinent to the dipole technique. However, in this conversion process the connection of the field components to the physical processes taking place at the source that generate these fields (i.e., static charges, uniformly moving charges and accelerating charges) is lost.http://www.mdpi.com/2073-4433/10/1/22Electromagnetic fieldsreturn strokesdipole fieldsaccelerating chargesradiation fieldsstatic fieldsvelocity fields |
| spellingShingle | Vernon Cooray Gerald Cooray A Novel Interpretation of the Electromagnetic Fields of Lightning Return Strokes Atmosphere Electromagnetic fields return strokes dipole fields accelerating charges radiation fields static fields velocity fields |
| title | A Novel Interpretation of the Electromagnetic Fields of Lightning Return Strokes |
| title_full | A Novel Interpretation of the Electromagnetic Fields of Lightning Return Strokes |
| title_fullStr | A Novel Interpretation of the Electromagnetic Fields of Lightning Return Strokes |
| title_full_unstemmed | A Novel Interpretation of the Electromagnetic Fields of Lightning Return Strokes |
| title_short | A Novel Interpretation of the Electromagnetic Fields of Lightning Return Strokes |
| title_sort | novel interpretation of the electromagnetic fields of lightning return strokes |
| topic | Electromagnetic fields return strokes dipole fields accelerating charges radiation fields static fields velocity fields |
| url | http://www.mdpi.com/2073-4433/10/1/22 |
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