Electrostatic shock properties inferred from AKR fine structure
The auroral kilometric radiation (AKR) consists of a large number of fast drifting elementary radiation events that have been interpreted as travelling electron holes resulting from the nonlinear evolution of electron-acoustic waves. The elementary radiation structures sometimes become reflected...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2003-01-01
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| Series: | Nonlinear Processes in Geophysics |
| Online Access: | http://www.nonlin-processes-geophys.net/10/87/2003/npg-10-87-2003.pdf |
| _version_ | 1818682945625391104 |
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| author | R. Pottelette R. A. Treumann M. Berthomier J. Jasperse |
| author_facet | R. Pottelette R. A. Treumann M. Berthomier J. Jasperse |
| author_sort | R. Pottelette |
| collection | DOAJ |
| description | The auroral kilometric radiation (AKR) consists of a large number of fast drifting elementary radiation events that have been interpreted as travelling electron holes resulting from the nonlinear evolution of electron-acoustic waves. The elementary radiation structures sometimes become reflected or trapped in slowly drifting larger structures where the parallel electric fields are located. These latter features have spectral frequency drifts which can be interpreted in terms of the propagation of shock-like disturbances along the auroral field line at velocities near the ion-acoustic speed. The amplitude, speed, and shock width of such localized ion-acoustic shocks are determined here in the fluid approximation from the Sagdeev potential, assuming realistic plasma parameters. It is emphasized that the electrostatic potentials of such nonlinear structures contribute to auroral acceleration. |
| first_indexed | 2024-12-17T10:26:54Z |
| format | Article |
| id | doaj.art-6b6614f66bde41dd9061357371ca67d7 |
| institution | Directory Open Access Journal |
| issn | 1023-5809 1607-7946 |
| language | English |
| last_indexed | 2024-12-17T10:26:54Z |
| publishDate | 2003-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Nonlinear Processes in Geophysics |
| spelling | doaj.art-6b6614f66bde41dd9061357371ca67d72022-12-21T21:52:38ZengCopernicus PublicationsNonlinear Processes in Geophysics1023-58091607-79462003-01-01101/28792Electrostatic shock properties inferred from AKR fine structureR. PotteletteR. A. TreumannM. BerthomierJ. JasperseThe auroral kilometric radiation (AKR) consists of a large number of fast drifting elementary radiation events that have been interpreted as travelling electron holes resulting from the nonlinear evolution of electron-acoustic waves. The elementary radiation structures sometimes become reflected or trapped in slowly drifting larger structures where the parallel electric fields are located. These latter features have spectral frequency drifts which can be interpreted in terms of the propagation of shock-like disturbances along the auroral field line at velocities near the ion-acoustic speed. The amplitude, speed, and shock width of such localized ion-acoustic shocks are determined here in the fluid approximation from the Sagdeev potential, assuming realistic plasma parameters. It is emphasized that the electrostatic potentials of such nonlinear structures contribute to auroral acceleration.http://www.nonlin-processes-geophys.net/10/87/2003/npg-10-87-2003.pdf |
| spellingShingle | R. Pottelette R. A. Treumann M. Berthomier J. Jasperse Electrostatic shock properties inferred from AKR fine structure Nonlinear Processes in Geophysics |
| title | Electrostatic shock properties inferred from AKR fine structure |
| title_full | Electrostatic shock properties inferred from AKR fine structure |
| title_fullStr | Electrostatic shock properties inferred from AKR fine structure |
| title_full_unstemmed | Electrostatic shock properties inferred from AKR fine structure |
| title_short | Electrostatic shock properties inferred from AKR fine structure |
| title_sort | electrostatic shock properties inferred from akr fine structure |
| url | http://www.nonlin-processes-geophys.net/10/87/2003/npg-10-87-2003.pdf |
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