Ultrashort electron bunch length measurements at DUVFEL

William Graves, G. L. Carr, L. F. DiMauro, A. Doyuran, R. Heese, E. D. Johnson, C. Neuman, G. Rakowsky, J. Rose, J. Rudati, T. Shaftan, B. Sheehy, J. Skaritka, L. H. Yu, D. H. Dowell

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

10 Scopus citations


The DUVFEL electron linac is designed to produce sub-picosecond, high brightness electron bunches for driving a short wavelength FEL. Four experiments have been commissioned to address the challenge of accurately measuring bunch lengths on this timescale. In the frequency domain, a short 12 period undulator is used to produce both off-axis coherent emission and on-axis incoherent single-shot spectra. The total coherent infrared power scales inversely with bunch length and the spectral cutoff is an indication of bunch length. The density of power spikes in the single-shot visible spectrum may also be used to estimate bunch length. In the time domain, the linac accelerating sections and a bending magnet are used to implement the RF-zero phasing method, and a sub-picosecond streak camera is also installed. Beam measurements and comparisons of these methods are reported.

Original languageEnglish (US)
Title of host publicationProceedings of the IEEE Particle Accelerator Conference
EditorsP Lucas, S Webber
Number of pages3
StatePublished - 2001
Externally publishedYes
Event2001 Particle Accelerator Conference - Chicago, IL, United States
Duration: Jun 18 2001Jun 22 2001


Other2001 Particle Accelerator Conference
Country/TerritoryUnited States
CityChicago, IL

ASJC Scopus subject areas

  • General Engineering


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