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). -. ISSN 0295-5075Full text not available in this repository. (Request a copy from the Strathclyde author)
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.
|Keywords:||lasers, electron beam, Physics, Physics and Astronomy(all)|
|Subjects:||Science > Physics|
|Department:||Faculty of Science > Physics|
|Depositing user:||Pure Administrator|
|Date Deposited:||18 Oct 2011 14:10|
|Last modified:||04 May 2016 19:43|