Community Research and Development Information Service - CORDIS

Abstract

The distribution function of suprathermal electrons in a slowly cooling plasma is calculated by an asymptotic expansion in the cooling rate divided by the collision frequency. Since the collision frequency decreases with increasing velocity, a high-energy tail forms in the electron distribution function as the bulk population cools down. Under certain simplifying assumptions (slow cooling, constant density, Born approximation of cross sections), the distribution function evolves to a self-similar state where the tail is inversely proportional to the cube of the velocity. Its practical consequences are discussed briefly.

Additional information

Authors: SMITH H, Chalmers University of Technology and EURATOM-VR Assocation, Göteborg (SE);FÜLÖP T, Chalmers University of Technology and EURATOM-VR Assocation, Göteborg (SE);ERIKSSON L-G, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);HELANDER P, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);FULOP T, Chalmers University of Technology and EURATOM-VR Assocation, Goteborg (SE)
Bibliographic Reference: An article published in: Physics of Plasmas, Vol. 11 (2004) Nr 12, p. 5704-5709
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://scitation.aip.org/pop/
Record Number: 200518071 / Last updated on: 2005-04-19
Category: PUBLICATION
Original language: en
Available languages: en