Energy phase correlation and pulse dynamics in short bunch high gain FELs

G. Dattoli, L. Giannessi, S. Pagnutti, P.L. Ottaviani

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1 Citation (Scopus)


We analyze the dynamics of Free Electron Laser (FEL) devices, operating with a bunched beam exhibiting a longitudinal phase space correlation. We show that the presence of an energy-position correlation term is responsible for very interesting effects like an enhancement of the peak output power, a shortening of the laser pulses and an increase of the non linearly generated harmonic intensities. We conjecture that the mechanism is due to a kind of energy tapering effect associated with the correlation. We discuss the difference of the dynamics with respect to an ordinary undulator tapering and the relative advantages. © 2011 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)710 - 714
Number of pages5
JournalOptics Communications
Issue number5
Publication statusPublished - 1 Mar 2012
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

Dattoli, G., Giannessi, L., Pagnutti, S., & Ottaviani, P. L. (2012). Energy phase correlation and pulse dynamics in short bunch high gain FELs. Optics Communications, 285(5), 710 - 714.