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Radiation damping in pulsed Gaussian beams
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
2012 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 85, no 1, 013412-013424 p.Article in journal (Refereed) Published
Abstract [en]

We consider the effects of radiation damping on the electron dynamics in a Gaussian-beam model of a laser field. For high intensities, i.e., with dimensionless intensity a0≫1, it is found that the dynamics divides into three regimes. For low-energy electrons (low initial γ factor, γ0) the radiation damping effects are negligible. At higher energies, but still at 2γ0<a0, the damping alters the final displacement and the net energy change of the electron. For 2γ0>a0 one is in a regime of radiation-reaction-induced electron capture. This capture is found to be stable with respect to the spatial properties of the electron beam and results in a significant energy loss of the electrons. In this regime the plane-wave model of the laser field provides a good description of the dynamics, whereas for lower energies the Gaussian-beam and plane-wave models differ significantly. Finally the dynamics is considered for the case of an x-ray free-electron laser field. It is found that the significantly lower intensities of such fields inhibit the damping effects.

Place, publisher, year, edition, pages
American Physical Society , 2012. Vol. 85, no 1, 013412-013424 p.
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Physical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-51259DOI: 10.1103/PhysRevA.85.013412OAI: oai:DiVA.org:umu-51259DiVA: diva2:478037
Available from: 2012-01-15 Created: 2012-01-15 Last updated: 2017-12-08Bibliographically approved

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Harvey, ChristopherMarklund, Mattias

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