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Funding: This work is supported by the University of Wisconsin-Madison and MIT, and by the US NSF under award No. DMR-0537588
The Wisconsin FEL project is a 2.2 GeV, HHG seeded, FEL designed to provide six individual beamlines with photons from 5 to 900 eV. The FEL requires electron bunches with 1 kA peak bunch current and less than 1 mm*mrad transverse slice emittance. To meet those requirements a low frequency, SRF electron gun is proposed which uses "blow-out" mode bunches*. Blow-out mode produces ellipsoidal bunches which are easily emittance compensated**. They also have a very smooth density and energy distribution. Results of the modeling of the injector and a diagnostic beamline will be presented.
* O.J. Luiten, et al., Phys. Rev. Lett., 93, 094802-1 (2004)
** C. Limborg-Deprey, P. Bolton, NIM-A, 557 (2006) 106-116
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