Spectral properties of electrostatic drift wave turbulence in the laboratory and the ionosphere
Low-frequency electrostatic drift wave turbulence has been studied in both laboratory plasmas and in space. The present review describes a number of such laboratory experiments together with results obtained by instrumented spacecraft in the Earth's near and distant ionospheres. The summary...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2015-07-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/33/875/2015/angeo-33-875-2015.pdf |
| Summary: | Low-frequency electrostatic drift wave turbulence has been studied in both
laboratory plasmas and in space. The present review describes a number of
such laboratory experiments together with results obtained by instrumented
spacecraft in the Earth's near and distant ionospheres. The summary
emphasizes readily measurable quantities, such as the turbulent power spectra
for the fluctuations in plasma density, potential and electric fields. The
agreement between power spectra measured in the laboratory and in space seems
to be acceptable, but there are sufficiently frequent counterexamples to
justify a future dedicated analysis, for instance by numerical tools, to
explain deviations. When interpreting spectra at low ionospheric altitudes,
it is necessary to give attention to the DC ionospheric electric fields and
the differences in the physics of electron–ion collisions and collisions of
charged particles with neutrals for cases with significant Hall drifts. These
effects modify the drift wave spectra. A dedicated laboratory experiment
accounted for some of these differences. |
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| ISSN: | 0992-7689 1432-0576 |