Microbunching and beam break-up in DUV-FEL accelerator

T. Shaftan, H. Loos, B. Sheehy, L. Carr, Z. Huang, C. Limborg, William Graves

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We present the results of electron beam longitudinal modulation studies in the DUV-FEL accelerator. For bunch length determination we used the "zero-phasing" method, based on a measurement of the chirped electron bunch energy spectra. The measurements revealed a spiky structure in the longitudinal phase space [1]. A model based on space charge effect is considered [2] to explain of the obtained phenomena. The analysis of the energy spectra has shown a sensitivity of the structure to the electron beam peak current, energy and longitudinal non-uniformity of the RF gun drive laser. Analytical calculations have demonstrated a qualitative agreement with experimental observations. Several experiments have been made to compare with theory; measured results are reviewed in this paper. The obtained effect is briefly discussed in relation to high brightness accelerators.

Original languageEnglish (US)
Title of host publicationProceedings of the IEEE Particle Accelerator Conference
EditorsJ. Chew, P. Lucas, S. Webber
Number of pages3
StatePublished - 2003
Externally publishedYes
EventPAC 2003 - Proceedings of the 2003 IEEE Particle Accelerator Conference - Portland, OR, United States
Duration: May 12 2003May 16 2003


OtherPAC 2003 - Proceedings of the 2003 IEEE Particle Accelerator Conference
Country/TerritoryUnited States
CityPortland, OR

ASJC Scopus subject areas

  • Engineering(all)


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