Effect of ion beam on electromagnetic ion cyclotron instability in hot anisotropic plasma-particle aspect analysis
Using the general loss-cone distribution function electromagnetic ion cyclotron (EMIC) instability affected by up going ion beam has been studied by investigating the trajectories of charged particles. The plasma consisting of resonant and non-resonant particles has been considered. It is assume...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2011-08-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/29/1469/2011/angeo-29-1469-2011.pdf |
| _version_ | 1818509667587850240 |
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| author | S. Patel P. Varma M. S. Tiwari N. Shukla |
| author_facet | S. Patel P. Varma M. S. Tiwari N. Shukla |
| author_sort | S. Patel |
| collection | DOAJ |
| description | Using the general loss-cone distribution function electromagnetic ion
cyclotron (EMIC) instability affected by up going ion beam has been studied
by investigating the trajectories of charged particles. The plasma
consisting of resonant and non-resonant particles has been considered. It is
assumed that the resonant particles participate in energy exchange with the
wave, whereas non-resonant particles support the oscillatory motion of the
wave. The effect of ion beam velocity on the dispersion relation, growth
rate, parallel and perpendicular resonant energy of the EMIC wave with
general loss-cone distribution function in hot anisotropic plasma is
described by particle aspect approach. The effect of beam anisotropy and
beam density on electromagnetic ion cyclotron instabilities is investigated.
Growth length is derived for EMIC waves in hot anisotropic plasma. It is
found that the effect of the ion beam is to reduce the energy of
transversely heated ions, whereas the thermal anisotropy of the background
plasma acts as a source of free energy for the EMIC wave and enhances the
growth rate. It is observed that ion beam velocity opposite to the wave
propagation and its density reduces the growth rate and enhance the
reduction in perpendicularly heated ions energy. The effect of ion beam
anisotropy on EMIC wave is also discussed. These results are determined for
auroral acceleration region. It is also found that the EMIC wave emissions
occur by extracting energy of perpendicularly heated ions in the presence of
an up flowing ion beam. |
| first_indexed | 2024-12-10T22:48:32Z |
| format | Article |
| id | doaj.art-5d336c3fea9f4c3d951eaaf06e90562c |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-10T22:48:32Z |
| publishDate | 2011-08-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-5d336c3fea9f4c3d951eaaf06e90562c2022-12-22T01:30:30ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762011-08-01291469147810.5194/angeo-29-1469-2011Effect of ion beam on electromagnetic ion cyclotron instability in hot anisotropic plasma-particle aspect analysisS. Patel0P. Varma1M. S. Tiwari2N. Shukla3Department of Physics, Dr. H.S.Gour Central University, Sagar (M.P.) – 470003, IndiaDepartment of Physics, Dr. H.S.Gour Central University, Sagar (M.P.) – 470003, IndiaDepartment of Physics, Dr. H.S.Gour Central University, Sagar (M.P.) – 470003, IndiaDepartment of Physics, Dr. H.S.Gour Central University, Sagar (M.P.) – 470003, IndiaUsing the general loss-cone distribution function electromagnetic ion cyclotron (EMIC) instability affected by up going ion beam has been studied by investigating the trajectories of charged particles. The plasma consisting of resonant and non-resonant particles has been considered. It is assumed that the resonant particles participate in energy exchange with the wave, whereas non-resonant particles support the oscillatory motion of the wave. The effect of ion beam velocity on the dispersion relation, growth rate, parallel and perpendicular resonant energy of the EMIC wave with general loss-cone distribution function in hot anisotropic plasma is described by particle aspect approach. The effect of beam anisotropy and beam density on electromagnetic ion cyclotron instabilities is investigated. Growth length is derived for EMIC waves in hot anisotropic plasma. It is found that the effect of the ion beam is to reduce the energy of transversely heated ions, whereas the thermal anisotropy of the background plasma acts as a source of free energy for the EMIC wave and enhances the growth rate. It is observed that ion beam velocity opposite to the wave propagation and its density reduces the growth rate and enhance the reduction in perpendicularly heated ions energy. The effect of ion beam anisotropy on EMIC wave is also discussed. These results are determined for auroral acceleration region. It is also found that the EMIC wave emissions occur by extracting energy of perpendicularly heated ions in the presence of an up flowing ion beam.https://www.ann-geophys.net/29/1469/2011/angeo-29-1469-2011.pdf |
| spellingShingle | S. Patel P. Varma M. S. Tiwari N. Shukla Effect of ion beam on electromagnetic ion cyclotron instability in hot anisotropic plasma-particle aspect analysis Annales Geophysicae |
| title | Effect of ion beam on electromagnetic ion cyclotron instability in hot anisotropic plasma-particle aspect analysis |
| title_full | Effect of ion beam on electromagnetic ion cyclotron instability in hot anisotropic plasma-particle aspect analysis |
| title_fullStr | Effect of ion beam on electromagnetic ion cyclotron instability in hot anisotropic plasma-particle aspect analysis |
| title_full_unstemmed | Effect of ion beam on electromagnetic ion cyclotron instability in hot anisotropic plasma-particle aspect analysis |
| title_short | Effect of ion beam on electromagnetic ion cyclotron instability in hot anisotropic plasma-particle aspect analysis |
| title_sort | effect of ion beam on electromagnetic ion cyclotron instability in hot anisotropic plasma particle aspect analysis |
| url | https://www.ann-geophys.net/29/1469/2011/angeo-29-1469-2011.pdf |
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