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Observation of anomalously large spectral bandwidth in a high-gain self-amplified spontaneous emission free-electron laser

  • G. Andonian
  • , A. Murokh
  • , J. B. Rosenzweig
  • , R. Agustsson
  • , M. Babzien
  • , I. Ben-Zvi
  • , P. Frigola
  • , J. Y. Huang
  • , L. Palumbo
  • , C. Pellegrini
  • , S. Reiche
  • , G. Travish
  • , C. Vicario
  • , V. Yakimenko
  • University of California at Los Angeles
  • Brookhaven National Laboratory
  • University of Rome La Sapienza

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

Observation of ultrawide bandwidth, up to 15% full-width, high-gain operation of a self-amplified spontaneous emission free-election laser (SASE FEL) is reported. This type of lasing is obtained with a strongly chirped beam (δE/E∼1.7%) emitted from the accelerator. Because of nonlinear pulse compression during transport, a short, high current bunch with strong mismatch errors is injected into the undulator, giving high FEL gain. Start-to-end simulations reproduce key features of the measurements and provide insight into mechanisms, such as angular spread in emitted photon and electron trajectory distributions, which yield novel features in the radiation spectrum.

Original languageEnglish
Article number054801
JournalPhysical Review Letters
Volume95
Issue number5
DOIs
StatePublished - Jul 29 2005

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