Superradiance in a short-pulse free-electron-laser oscillator

D.A. Jaroszynski, P. Chaix, N. Piovella, D. Oepts, G.M.H. Knippels, A.F.G. vanderMeer, H.H. Weits

Research output: Contribution to journalArticle

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Abstract

We demonstrate that superradiance (SR) is a general feature of free-electron-laser (FEL) devices, incuding high gain amplifiers as well as low gain oscillators, and that SR pulses and spiking, due to synchrotron instabilities, have the same origin. In particular, we present a direct observation of SR from an FEL oscillator. The ultrashort SR pulses are characterized by a peak intensity and pulse duration which depend, respectively, on the square and the inverse square root of the electron current. The spectral brightness, B, defined as the ratio between the efficiency and the relative rms spectral width, is constant and equal to 0.86. © 1997 The American Physical Society
LanguageEnglish
Pages1699-1702
Number of pages3
JournalPhysical Review Letters
Volume78
Issue number9
DOIs
Publication statusPublished - 3 Mar 1997

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free electron lasers
oscillators
spiking
pulses
high gain
synchrotrons
brightness
pulse duration
amplifiers
electrons

Keywords

  • superradiance
  • short-pulse free-electron-laser oscillator
  • high gain amplifiers
  • synchrotron instabilities

Cite this

Jaroszynski, D. A., Chaix, P., Piovella, N., Oepts, D., Knippels, G. M. H., vanderMeer, A. F. G., & Weits, H. H. (1997). Superradiance in a short-pulse free-electron-laser oscillator. Physical Review Letters, 78(9), 1699-1702. https://doi.org/10.1103/PhysRevLett.78.1699
Jaroszynski, D.A. ; Chaix, P. ; Piovella, N. ; Oepts, D. ; Knippels, G.M.H. ; vanderMeer, A.F.G. ; Weits, H.H. / Superradiance in a short-pulse free-electron-laser oscillator. In: Physical Review Letters. 1997 ; Vol. 78, No. 9. pp. 1699-1702.
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Jaroszynski, DA, Chaix, P, Piovella, N, Oepts, D, Knippels, GMH, vanderMeer, AFG & Weits, HH 1997, 'Superradiance in a short-pulse free-electron-laser oscillator' Physical Review Letters, vol. 78, no. 9, pp. 1699-1702. https://doi.org/10.1103/PhysRevLett.78.1699

Superradiance in a short-pulse free-electron-laser oscillator. / Jaroszynski, D.A.; Chaix, P.; Piovella, N.; Oepts, D.; Knippels, G.M.H.; vanderMeer, A.F.G.; Weits, H.H.

In: Physical Review Letters, Vol. 78, No. 9, 03.03.1997, p. 1699-1702.

Research output: Contribution to journalArticle

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T1 - Superradiance in a short-pulse free-electron-laser oscillator

AU - Jaroszynski, D.A.

AU - Chaix, P.

AU - Piovella, N.

AU - Oepts, D.

AU - Knippels, G.M.H.

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AU - Weits, H.H.

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AB - We demonstrate that superradiance (SR) is a general feature of free-electron-laser (FEL) devices, incuding high gain amplifiers as well as low gain oscillators, and that SR pulses and spiking, due to synchrotron instabilities, have the same origin. In particular, we present a direct observation of SR from an FEL oscillator. The ultrashort SR pulses are characterized by a peak intensity and pulse duration which depend, respectively, on the square and the inverse square root of the electron current. The spectral brightness, B, defined as the ratio between the efficiency and the relative rms spectral width, is constant and equal to 0.86. © 1997 The American Physical Society

KW - superradiance

KW - short-pulse free-electron-laser oscillator

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Jaroszynski DA, Chaix P, Piovella N, Oepts D, Knippels GMH, vanderMeer AFG et al. Superradiance in a short-pulse free-electron-laser oscillator. Physical Review Letters. 1997 Mar 3;78(9):1699-1702. https://doi.org/10.1103/PhysRevLett.78.1699