Experimental study of the spatial evolution of the spectrum of a Raman FEL

P. Zambon*, W.J. Witteman, P.J.M. van der Slot

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)
133 Downloads (Pure)


For a specific set of parameters, corresponding to an operating point near magneto-resonance, the evolution of the spectrum generated by a Raman FEL was investigated. It is shown that in several frequency bands radiation is emitted. These different frequencies are identified as belonging to the FEL instability and another mechanism, probably the gyrotron instability. The measurements show apparently a competition between these mechanisms. The experimentally determined growth rate is somewhat larger than the theoretical one, indicating that the FEL does not operate as a true amplifier.
Original languageEnglish
Pages (from-to)126-128
Number of pages3
JournalNuclear instruments & methods in physics research. Section A : Accelerators, spectrometers, detectors and associated equipment
Issue number1-3
Publication statusPublished - 1995
Event16th International Free Electron Laser Conference, FEL 1994 - Stanford, United States
Duration: 22 Aug 199426 Aug 1994
Conference number: 16


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