Some aspects of ion-acoustic whistlers in the ionosphere in the presence of negative ions
A study is made of the propagation of ion-acoustic whistlers in the atmosphere including the effects of negative ions. The dispersion relation, phase and group velocities of whistlers are discussed. It is shown that the presence of negative ions introduces a critical frequency which, for equal ionic...
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| Format: | Article |
| Language: | English |
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Wiley
1989-01-01
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| Series: | International Journal of Mathematics and Mathematical Sciences |
| Online Access: | http://dx.doi.org/10.1155/S0161171289000931 |
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| author | A. K. Sur G. C. Das B. Chakraborty S. N. Paul L. Debnath |
| author_facet | A. K. Sur G. C. Das B. Chakraborty S. N. Paul L. Debnath |
| author_sort | A. K. Sur |
| collection | DOAJ |
| description | A study is made of the propagation of ion-acoustic whistlers in the
atmosphere including the effects of negative ions. The dispersion relation, phase and
group velocities of whistlers are discussed. It is shown that the presence of
negative ions introduces a critical frequency which, for equal ionic masses, is equal
to the ion-cyclotron frequency. Special attention is given to the group travel time
of whistlers at mid-latitude and equator so that the role of negative ions on the
group travel time can be determined. The cyclotron damping of whistlers in the
presence of negative ions has been studied. The velocity distribution, total
attenuation and the induced magnetic field are calculated from the temporal as well as
spatial cyclotron damping. It is suggested that the attenuation of whistlers may
cause heating of the ionosphere. It is also indicated that the measurement of the
group travel time from its source to the observer at the satellite would help to
diagnose the ionospheric parameters. The results of the analysis are presented by
several graphical presentations. |
| format | Article |
| id | doaj-art-5b59c01ae4ac48378f507eda73a98e3b |
| institution | Kabale University |
| issn | 0161-1712 1687-0425 |
| language | English |
| publishDate | 1989-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Mathematics and Mathematical Sciences |
| spelling | doaj-art-5b59c01ae4ac48378f507eda73a98e3b2025-02-03T05:47:56ZengWileyInternational Journal of Mathematics and Mathematical Sciences0161-17121687-04251989-01-0112474977210.1155/S0161171289000931Some aspects of ion-acoustic whistlers in the ionosphere in the presence of negative ionsA. K. Sur0G. C. Das1B. Chakraborty2S. N. Paul3L. Debnath4Plasma Physics Group, Department of Mathematics, Jadavpur University, Calcutta 700032, IndiaPlasma Physics Group, Department of Mathematics, Jadavpur University, Calcutta 700032, IndiaPlasma Physics Group, Department of Mathematics, Jadavpur University, Calcutta 700032, IndiaDepartment of Mathematics, University of Central Florida, Orlando, Florida 32816, USAPlasma Physics Group, Department of Mathematics, Jadavpur University, Calcutta 700032, IndiaA study is made of the propagation of ion-acoustic whistlers in the atmosphere including the effects of negative ions. The dispersion relation, phase and group velocities of whistlers are discussed. It is shown that the presence of negative ions introduces a critical frequency which, for equal ionic masses, is equal to the ion-cyclotron frequency. Special attention is given to the group travel time of whistlers at mid-latitude and equator so that the role of negative ions on the group travel time can be determined. The cyclotron damping of whistlers in the presence of negative ions has been studied. The velocity distribution, total attenuation and the induced magnetic field are calculated from the temporal as well as spatial cyclotron damping. It is suggested that the attenuation of whistlers may cause heating of the ionosphere. It is also indicated that the measurement of the group travel time from its source to the observer at the satellite would help to diagnose the ionospheric parameters. The results of the analysis are presented by several graphical presentations.http://dx.doi.org/10.1155/S0161171289000931 |
| spellingShingle | A. K. Sur G. C. Das B. Chakraborty S. N. Paul L. Debnath Some aspects of ion-acoustic whistlers in the ionosphere in the presence of negative ions International Journal of Mathematics and Mathematical Sciences |
| title | Some aspects of ion-acoustic whistlers in the ionosphere in the presence of negative ions |
| title_full | Some aspects of ion-acoustic whistlers in the ionosphere in the presence of negative ions |
| title_fullStr | Some aspects of ion-acoustic whistlers in the ionosphere in the presence of negative ions |
| title_full_unstemmed | Some aspects of ion-acoustic whistlers in the ionosphere in the presence of negative ions |
| title_short | Some aspects of ion-acoustic whistlers in the ionosphere in the presence of negative ions |
| title_sort | some aspects of ion acoustic whistlers in the ionosphere in the presence of negative ions |
| url | http://dx.doi.org/10.1155/S0161171289000931 |
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