Microbunching and Beam Break Up in DUV FEL Accelerator

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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 ... continued below

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Shaftan, T.; Carr, L.; Loos, H.; Sheehy, B.; Graves, William S.; Huang, Z. et al. March 17, 2008.

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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.

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  • Journal Name: Conf.Proc.C030512:329,2003; Conference: Particle Accelerator Conference (PAC 03) 12-16 May 2003, Portland, Oregon

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  • Report No.: SLAC-PUB-13174
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 925777
  • Archival Resource Key: ark:/67531/metadc898704

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  • March 17, 2008

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  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 6, 2016, 1:21 p.m.

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Shaftan, T.; Carr, L.; Loos, H.; Sheehy, B.; Graves, William S.; Huang, Z. et al. Microbunching and Beam Break Up in DUV FEL Accelerator, article, March 17, 2008; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc898704/: accessed September 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.