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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the European Policies Research Centre (EPRC).

EPRC is a leading institute in Europe for comparative research on public policy, with a particular focus on regional development policies. Spanning 30 European countries, EPRC research programmes have a strong emphasis on applied research and knowledge exchange, including the provision of policy advice to EU institutions and national and sub-national government authorities throughout Europe.

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Electrostatic solitary structures in nonthermal plasmas

Cairns, R. A. and Mamum, A. A. and Bingham, R. and Bostrom, R. and Dendy, R. O. and Nairn, C. M. C. and Shukla, P. K. (1995) Electrostatic solitary structures in nonthermal plasmas. Geophysical Research Letters, 22 (20). pp. 2709-2712. ISSN 0094-8276

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Abstract

Solitary electrostatic structures involving density depletions have been observed in the upper ionosphere by the Freja satellite [Dovner et al., 1994]. If these are interpreted as ion sound solitons, the difficulty arises that the standard Korteweg-de Vries description predicts structures with enhanced rather than depleted density. Here we show that the presence of non-thermal electrons may change the nature of ion sound solitary structures and allow the existence of structures very like those observed.