An analytical solution of finite‐amplitude solitary kinetic Alfvén waves
1995 (English)In: Physics of Plasmas, ISSN 1070-664X, Vol. 2, 4476-4481 p.Article in journal (Refereed) Published
An analytical solution of finite-amplitude solitary kinetic Alfven waves (SKAWs) in a low-beta (beta much less than m(e)/m(i) much less than 1) plasma is presented. This solution has been compared with the solution of the Korteweg-de Vries (KdV) equation in the small-amplitude limit. It is found that the KdV soliton solution is valid only for the maximum relative density perturbation N-m<0.1. For the larger N-m, the exact analytical solution shows that the SKAWs have a much wider structure and much stronger perturbed fields than the KdV solitons with the same N-m. Moreover, the relations between the width and the amplitude of SKAWs are also considerably different from that of the KdV solitons. In addition the possibility for applying these results to some events observed from the Freja scientific satellite is discussed. (The Freja is a Swedish-German scientific project for the investigation of ionospheric and magnetospheric plasmas, and the Freja satellite was launched on a Long-March II rocket of China on October 6, 1992.) (C) 1995 American Institute of Physics.
Place, publisher, year, edition, pages
1995. Vol. 2, 4476-4481 p.
Fusion, Plasma and Space Physics
IdentifiersURN: urn:nbn:se:kth:diva-92871DOI: 10.1063/1.871005OAI: oai:DiVA.org:kth-92871DiVA: diva2:514356
NR 201408052012-04-082012-04-072012-04-08Bibliographically approved