Coherent and self-amplified infrared synchrotron radiation emitted by a 50-mev electron beam

J.M. Ortega, R. Prazeres, F. Glotin, D.A. Jaroszynski

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We have observed and analyzed the coherent spontaneous emission (CSE) and the self-amplified spontaneous emission (SASE) emitted, in the near infrared spectral range, by short pulses of relativistic electrons passing through an undulator. The CSE is surprisingly large at wavelengths much shorter than the electron pulse length. The SASE spectral line exhibits an unexpected growth at the start-up of the process. Both phenomena are fluctuating and can be distinguished only by careful spectral measurements.
Original languageEnglish
Pages (from-to)1053-1060
Number of pages7
JournalPhysical Review E
Issue number1
Publication statusPublished - Jan 1998


  • coherent spontaneous emission
  • synchrotron radiation
  • 50-mev electron beam

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