The quantum free electron laser: A new source of coherent, short-wavelength radiation

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Bonifacio, R. and Piovella, N. and Robb, G. R. M. (2009) The quantum free electron laser: A new source of coherent, short-wavelength radiation. Progress of Physics, 57 (11-12). pp. 1041-1051. ISSN 0015-8208 (https://doi.org/10.1002/prop.200900097)

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Abstract

A Free Electron Laser (FEL) operating in the quantum regime can provide a compact and monochromatic Xray source. Here we review the basic principles of a high-gain quantum FEL starting from noise, with special emphasis on the self-amplified spontaneous emission (SASE) mode of operation. In the first part of the paper, a condition for the neglect of the fermionic character of the electrons is derived and the full quantum theory of the N-particle and single-radiation-mode FEL Hamiltonian is presented. Quantum effects such as cooperative gain, discrete spectrum and line narrowing are described, both in the multi-particle and in the second quantization formalism. In the second part, propagation effects (i.e. slippage) are described and the main features of the quantum SASE regime are discussed. The broad and spiky radiation spectrum observed in classical SASE reduces in the quantum regime to a series of narrow lines, associated with sequential transitions between adjacent momentum states. A simple interpretation of the discrete nature of the spectrum and of the linewidth of the single spike observed in the quantum regime is presented.

ORCID iDs

Bonifacio, R., Piovella, N. and Robb, G. R. M. ORCID logoORCID: https://orcid.org/0000-0002-3004-5926;
  • Item type:Article
    ID code:30215
    Dates:
    Date
    Event
    November 2009
    Published
    13 October 2009
    Published Online
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:17 Apr 2011 04:10
    Last modified:11 Nov 2024 09:42
    URI:https://strathprints.strath.ac.uk/id/eprint/30215
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