Quantum regime of free electron lasers starting from noise

Bonifacio, R. and Piovella, N. and Robb, G.R.M. and Schiavi, A. (2006) Quantum regime of free electron lasers starting from noise. Physical Review Special Topics: Accelerators and Beams, 9 (9). 090701. ISSN 1098-4402 (https://doi.org/10.1103/PhysRevSTAB.9.090701)

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Abstract

We investigate the quantum regime of a high-gain free-electron laser starting from noise. In the first part, we neglect the radiation propagation and we formulate a quantum linear theory of the N-particle free-electron laser Hamiltonian model, quantizing both the radiation field and the electron motion. Quantum effects such as frequency shift, line narrowing, quantum limitation for bunching and energy spread, and minimum uncertainty states are described. Using a second-quantization formalism, we demonstrate quantum entanglement between the recoiling electrons and the radiation field. In the second part, we describe the field classically but we include propagation effects (i.e. slippage) and we demonstrate the novel regime of quantum SASE with high temporal coherence and discrete spectrum. Furthermore, we describe "quantum purification'' of SASE: the classical chaotic spiking behavior disappears and the spectrum becomes a series of discrete very narrow lines which correspond to transitions between discrete momentum eigenstates ( which originate high temporal coherence).

ORCID iDs

Bonifacio, R., Piovella, N., Robb, G.R.M. ORCID logoORCID: https://orcid.org/0000-0002-3004-5926 and Schiavi, A.;
  • Item type:Article
    ID code:31113
    Dates:
    Date
    Event
    September 2006
    Published
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:01 Jul 2011 09:00
    Last modified:11 Nov 2024 09:44
    URI:https://strathprints.strath.ac.uk/id/eprint/31113
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