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MOPCH020 |
Design and Optimization of the FERMI @ Elettra FEL Layout
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- G. De Ninno, E. Allaria, B. Diviacco
ELETTRA, Basovizza, Trieste
- W.M. Fawley, G. Penn
LBNL, Berkeley, California
- W. Graves
MIT, Middleton, Massachusetts
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The FERMI @ ELETTRA project at Sincotrone Trieste will be comprised of two FEL's, each based on the principle of seeded harmonic generation. The first undulator line, FEL-1, will operate in the 40-100 nm wavelength range and will rely upon one stage of harmonic up-conversion. The second undulator line, FEL-2, extends the output spectral domain to the 10-40 nm wavelength range and will use two harmonic stages operating as a cascade. We review the FEL studies that have led to the final design and present results of numerical simulations with GENESIS and GINGER codes including those examining the effects of undulator errors and shot-to-shot fluctuations in multiple input parameters.
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MOPCH021 |
FERMI @ Elettra: Conceptual Design for a Seeded Harmonic Cascade FEL for EUV and Soft X-rays
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- C.J. Bocchetta, E. Allaria, D. Bulfone, P. Craievich, G. D'Auria, M.B. Danailov, G. De Ninno, S. Di Mitri, B. Diviacco, M. Ferianis, A. Gambitta, A. Gomezel, E. Karantzoulis, G. Penco, M. Trovo
ELETTRA, Basovizza, Trieste
- J.N. Corlett, W.M. Fawley, S.M. Lidia, G. Penn, A. Ratti, J.W. Staples, R.B. Wilcox, A. Zholents
LBNL, Berkeley, California
- M. Cornacchia, P. Emma
SLAC, Menlo Park, California
- W. Graves, F.O. Ilday, F.X. Kaertner, D. Wang
MIT, Middleton, Massachusetts
- F. Parmigiani
Università Cattolica-Brescia, Brescia
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We present a summary of the conceptual design for the FERMI FEL project funded for construction at the Sincrotrone Trieste, Italy. The project will be the first user facility based on seeded harmonic cascade FEL's, providing controlled, high peak-power pulses, and complementing the storage ring light source at Sincrotrone Trieste. The facility is to be driven by electron beam from a high-brightness rf photocathode gun, and using the existing 1.2 GeV S-band linac. Designed for an initial complement of two FEL's, providing tunable output over a range from ~100 nm to ~10 nm, FERMI will allow control of pulse duration from less than 100 fs to approximately1 ps, and with polarization control from APPLE undulator radiators. Seeded by tunable UV lasers, FEL-1 is a single-stage of harmonic generation to operate over ~100 nm to ~40 nm, and FEL-2 a two-stage cascade operating from ~40 nm to ~10 nm or shorter wavelength. Photon output is spatially and temporally coherent, with peak power in the 100s MW to GW range. We have designed FEL-2 to minimize the output radiation spectral bandwidth. Major systems and overal facility layout are described, and key performance parameters summarized.
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