Quantum effects in spontaneous emission by a relativistic, undulating electron beam

Robb, G. R. M. and Bonifacio, R. (2011) Quantum effects in spontaneous emission by a relativistic, undulating electron beam. EPL: A Letters Journal Exploring the Frontiers of Physics, 94 (3). 34002. ISSN 0295-5075 (https://doi.org/10.1209/0295-5075/94/34002)

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Abstract

Current models of the effect of spontaneous emission on the electron beam dynamics neglect the discreteness of electron recoil associated with photon emission. We present a novel, one-dimensional model of the effect of spontaneous emission on the electron beam dynamics in an undulator both in the classical regime where discrete electron recoil is negligible, and in the quantum regime where it is significant. It is shown that in the classical regime, continuous decrease of the average electron energy and diffusive growth of the electron energy spread occurs, in agreement with previous classical models. In the quantum regime, it is shown that the evolution of the electron momentum distribution occurs as discrete momentum groups according to a Poisson distribution. The narrow momentum features of the quantum regime may be useful for generation of coherent radiation, which relies on electron beams having sufficiently narrow momentum/energy distributions.

  • Item type:Article
    ID code:33749
    Dates:
    Date
    Event
    May 2011
    Published
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:18 Oct 2011 14:10
    Last modified:08 Apr 2024 19:26
    URI:https://strathprints.strath.ac.uk/id/eprint/33749
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