Beam-generated electrostatic electron waves: relevance to EISCAT VHF radar measurements |
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| Affiliation: | 1. L''institut du thorax, Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 6291, Université de Nantes, Nantes, France;2. Department of Clinical Research, University of Bern, Bern, Switzerland |
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| Abstract: | The generation by an electron beam of (slowly) growing electrostatic waves, detectable with the EISCAT VHF radar, is investigated. A set of graphs is derived from which it is possible to estimate, by interpolation, frequency, growth rate and resonant beam velocity for most situations of interest. The dependence of the mentioned variables on propagation direction, beam temperature and density and on ionospheric density over the part of parameter space that is of practical interest in the auroral and subauroral ionosphere is presented and discussed. |
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