2 papers

title:	The New Photoinjector for the Fermi Project
format:	journal article
year:	2007
14 authors:	G. D’Auria | D. Bacescu | L. Badano | F. Cianciosi | P. Craievich | M. Danailov | G. Penco | L. Rumiz | M. Trovo’ | A. Turchet | H. Badakov | A. Fukusawa | B. O’Shea | J.B. Rosenzweig
abstract:	FERMI@elettra is a single-pass FEL user facility covering the spectral range 100-10 nm. It will be located near the Italian third generation Synchrotron Light Source facility ELETTRA and will make use of the existing 1.0 GeV normal conducting Linac [1]. To obtain the high beam brightness required by the project, the present Linac electron source will be substituted with a photocathode RF gun now under development in the framework of a collaboration between Sincrotrone Trieste (ST) and Particle Beam Physics Laboratory (PBPL) at UCLA. The new gun will use an improved design of the 1.6 cell accelerating structure already developed at PBPL, scaled to 2998 MHz. We expect that the new gun design will allow a beam brightness increase by a factor 3-4 over the older version of the device. Some technical choices of the new design, including the enhancement of the mode separation, removal of the RF tuners, full cell symmetrization to limit the dipole and quadrupole RF field as well as an improved solenoid yoke design for multipole field corrections, will be discussed.
keywords:	pbpl
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title:	Status Report on SPARC Project
format:	journal article
year:
96 authors:	A. Renieri | M. Carpanese | F. Ciocci | G. Dattoli | A. Di Pace | A. Doria | F. Flora | G.P. Gallerano | L. Giannessi | E. Giovenale | G. Messina | L. Mezi | P.L. Ottaviani | S. Pagnutti | G. Parisi | L. Picardi | M. Quattromini | G. Ronci | C. Ronsivalle | E. Sabia | M. Sassi | A. Zucchini | D. Alesini | M. Bellaveglia | S. Bertolucci | M.E. Biagini | C. Biscari | R. Boni | M. Boscolo | M. Castellano | A. Clozza | G. Di Pirro | A. Drago | A. Esposito | M. Ferrario | D. Filippetto | V. Fusco | A. Gallo | A. Ghigo | S. Guiducci | M. Incurvati | C. Ligi | F. Marcellini | M. Migliorati | C. Milardi | L. Palumbo | L. Pellegrino | M. Preger | P. Raimondi | R. Ricci | C. Sanelli | M. Serio | F. Sgamma | B. Spataro | A. Stecchi | A. Stella | F. Tazzioli | C. Vaccarezza | M. Vescovi | C. Vicario | M. Zobov | F. Alessandria | A. Bacci | I. Boscolo | F. Broggi | S. Cialdi | C. De Martinis | D. Giove | C. Maroli | V. Petrillo | M. RomË | L. Serafini | D. Levi | M. Mattioli | G. Medici | P. Musumeci | L. Catani | E. Chiadroni | S. Tazzari | C.J. Bocchetta | M. Danailov | G. D'Auria | M. Ferianis | A. Cianchi | A. D'Angelo | R. Di Salvo | A. Fantini | D. Moricciani | C. Schaerf | S. Reiche | J.B. Rosenzweig | G. Travish | D.H. Dowell | P. Emma | C. Limborg | D. Palmer
abstract:	We review the status of FEL source activity of the ongoing SPARC FEL experiment, developed within the framework of a collaboration among ENEA, CNR, INFN, INFM, Sincrotrone Trieste and University of Rome Tor Vergata. The project is aimed at realising a SASE-FEL source, operating in the visible (around 500 nm), with an extended range of tunability down to the VUV (100 nm) by the use of the mechanism of non-linear harmonic generation. The development of the relevant activities foresees the realisation of an advanced 150 MeV photo- injector source, aimed at producing a high brightness electron beams, needed to drive a SASE-FEL experiment, and a 14 m long undulator. We present the status of the design and construction of SPARC FEL device. In particular we discuss the choice of the project parameters, their optimisation and the sensitivity of the SPARC performance to any parameter variation. We will show, using start-to-end simulations, what is the impact of the e- beam and of the undulator parameters on the characteristics of the output laser field and in particular on the amount of the non-linearly generated power at higher harmonics.
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