dorsal/arxiv
View SchemaAsymptotic analysis of ultra-relativistic charge
| Authors | David A. Burton, Jonathan Gratus, Robin W. Tucker |
|---|---|
| Categories | |
| ArXiv ID | physics/0512218 |
| URL | https://arxiv.org/abs/physics/0512218 |
| DOI | 10.1016/j.aop.2006.05.009 |
| Journal | Ann. Phys. 322/3 pp 599-632 (2007) |
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.
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"abstract": "This article offers a new approach for analysing the dynamic behaviour of\ndistributions of charged particles in an electromagnetic field. After\ndiscussing the limitations inherent in the Lorentz-Dirac equation for a single\npoint particle a simple model is proposed for a charged continuum interacting\nself-consistently with the Maxwell field in vacuo. The model is developed using\nintrinsic tensor field theory and exploits to the full the symmetry and\nlight-cone structure of Minkowski spacetime. This permits the construction of a\nregular stress-energy tensor whose vanishing divergence determines a system of\nnon-linear partial differential equations for the velocity and self-fields of\naccelerated charge. Within this covariant framework a particular perturbation\nscheme is motivated by an exact class of solutions to this system describing\nthe evolution of a charged fluid under the combined effects of both self and\nexternal electromagnetic fields. The scheme yields an asymptotic approximation\nin terms of inhomogeneous linear equations for the self-consistent Maxwell\nfield, charge current and time-like velocity field of the charged fluid and is\ndefined as an ultra-relativistic configuration. To facilitate comparisons with\nexisting accounts of beam dynamics an appendix translates the tensor\nformulation of the perturbation scheme into the language involving electric and\nmagnetic fields observed in a laboratory (inertial) frame.",
"arxiv_id": "physics/0512218",
"authors": [
"David A. Burton",
"Jonathan Gratus",
"Robin W. Tucker"
],
"categories": [
"physics.acc-ph",
"physics.plasm-ph"
],
"doi": "10.1016/j.aop.2006.05.009",
"journal_ref": "Ann. Phys. 322/3 pp 599-632 (2007)",
"title": "Asymptotic analysis of ultra-relativistic charge",
"url": "https://arxiv.org/abs/physics/0512218"
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