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Asymptotic Analysis for Ultra-relativistic Charge.

Burton, David A. and Gratus, Jonathan and Tucker, Robin W. (2007) Asymptotic Analysis for Ultra-relativistic Charge. Annals of Physics, 322 (3). pp. 599-630. ISSN 0003-4916

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    Abstract

    This article offers a new approach for analysing the dynamic behaviour of distributions of charged particles in an electromagnetic field. After discussing the limitations inherent in the Lorentz–Dirac equation for a single point particle a simple model is proposed for a charged continuum interacting self-consistently with the Maxwell field in vacuo. The model is developed using intrinsic tensor field theory and exploits to the full the symmetry and light-cone structure of Minkowski spacetime. This permits the construction of a regular stress-energy tensor whose vanishing divergence determines a system of non-linear partial differential equations for the velocity and self-fields of accelerated charge. Within this covariant framework a particular perturbation scheme is motivated by an exact class of solutions to this system describing the evolution of a charged fluid under the combined effects of both self and external electromagnetic fields. The scheme yields an asymptotic approximation in terms of inhomogeneous linear equations for the self-consistent Maxwell field, charge current and time-like velocity field of the charged fluid and is defined as an ultra-relativistic configuration. To facilitate comparisons with existing accounts of beam dynamics an appendix translates the tensor formulation of the perturbation scheme into the language involving electric and magnetic fields observed in a laboratory (inertial) frame.

    Item Type: Article
    Journal or Publication Title: Annals of Physics
    Additional Information: The final, definitive version of this article has been published in the Journal, Annals of Physics 322 (3), 2007, © ELSEVIER.
    Uncontrolled Keywords: Radiation reaction ; Ultra-relativistic particle beams ; Accelerated charge ; Non-neutral charge
    Subjects: Q Science > QC Physics
    Departments: Faculty of Science and Technology > Physics
    ID Code: 11231
    Deposited By: Prof Robin Tucker
    Deposited On: 06 Aug 2008 18:15
    Refereed?: Yes
    Published?: Published
    Last Modified: 24 Jan 2014 05:14
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/11231

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