Radiative damping and electron beam dynamics in plasma-based accelerators

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P. Michel, C. B. Schroeder, B. A. Shadwick, E. Esarey, and W. P. Leemans
Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

Received 27 April 2006; published 15 August 2006

Theeffects of radiation reaction on electron beam dynamics are studiedin the context of plasma-based accelerators. Electrons accelerated in aplasma channel undergo transverse betatron oscillations due to strong focusingforces. These oscillations lead to emission by the electrons ofsynchrotron radiation, with a corresponding energy loss that affects thebeam properties. An analytical model for the single particle orbitsand beam moments including the classical radiation reaction force isderived and compared to the results of a particle transportcode. Since the betatron amplitude depends on the initial transverseposition of the electron, the resulting radiation can increase therelative energy spread of the beam to significant levels (e.g.,several percent). This effect can be diminished by matching thebeam into the channel, which could require micron sized beamradii for typical values of the beam emittance and plasmadensity.

URL:	http://link.aps.org/doi/10.1103/PhysRevE.74.026501
DOI:	10.1103/PhysRevE.74.026501
PACS:	41.60.Ap; 41.75.Ht; 52.40.Mj 41.60.Ap Synchrotron radiation 41.75.Ht Relativistic electron and positron beams 52.40.Mj Particle beam interactions in plasmas YEAR: 2006
KEYWORDS:	plasma transport processes, plasma oscillations, plasma-beam interactions, plasma accelerators, synchrotron radiation, plasma density

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