FEL induced electron bunch heating observed by a method based on synchronous phase detection

M. Hosaka, S. Koda, M. Katoh, J. Yamazaki, H. Hama

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


A new method for monitoring instantaneous bunch length has been developed on the UVSOR storage ring. Based on the bunch length dependence of the loss factor, the bunch length can be derived from the synchronous phase shift. Experiments using this method were performed to observe the bunch lengthening associated with the free electron laser (FEL) power variation. From the detuning dependence of the bunch heating, it was found that additional energy spread mostly has a constant ratio to the intracavity laser power normalized by the beam current. However, at the best synchronism region, the induced energy spread exhibits a strong non-linearity against the normalized FEL power and hence the power saturation is accomplished.

Original languageEnglish
Pages (from-to)217-221
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number1-3
Publication statusPublished - 2001 Nov 21
Event22nd International Free Electron Laser Conference (FEL 2000) - Durham, NC, United States
Duration: 2000 Aug 132000 Aug 18


  • Free electron laser
  • Storage ring

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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