Agility of Felix Regarding Wavelength and Micropulse Shape

TitleAgility of Felix Regarding Wavelength and Micropulse Shape
Publication TypeJournal Article
Year of Publication1993
AuthorsR.J Bakker, C.AJ van der Geer, D.A Jaroszynski, A.FG van der Meer, D. Oepts, P.W van Amersfoort, V. Anderegg, P.C van Son
JournalNuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment
Date PublishedJul 1
ISBN Number0168-9002

The user-facility FELIX employs two FELs together covering the spectral range from 6.5 to 110 mum. Adjustment of the undulator strength permits wavelength tuning over a factor of two within two minutes while continuously providing several kilowatts of output power. As FELIX combines short electron bunches with long wavelengths, short-pulse effects play an important role. A spectral analysis and intensity correlation measurements show that the micropulses are virtually transform limited. At small cavity desynchronisation, the duration can be much smaller than the electron-bunch duration (3 ps). Indications of the formation of subpulses within the micropulse have been observed.



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