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Abstracts Brochure - CERN

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MOPCH — Poster Session 26-Jun-06 16:00 - 18:00<br />

conventional (periodic) cavity despite the need of accurate machining. A copper prototype made of 17 separated<br />

cells has been built following numerical simulation. In this paper we report on preliminary measurements of its RF<br />

properties. The main characteristics of the cooling system for the final device are also addressed.<br />

Photoemission and Morphological Properties of Mg and Pb Films Deposited by Laser Ablation<br />

and Vacuum Arc<br />

Advanced high brightness injectors require<br />

photocathodes with fast response,high quan- G. Gatti, L. Cultrera, F. Tazzioli, C. Vicario (INFN/LNF)<br />

tum efficiency and good surface uniformity.<br />

Both Mg films deposited by laser ablation and Pb films deposited by vacuum arc could satisfy these requirements.<br />

Their emission and morphology are compared.<br />

Status of the SPARX FEL Project<br />

The SPARX project is an R&D activity to develop<br />

techniques and critical components for<br />

future X-ray FEL facilities. The project is<br />

based on the upgrade of the existing Frascati<br />

800MeV LINAC in order to generate an ultra-high<br />

peak brightness electron beam with<br />

the goal of a single pass FEL experiment<br />

in the range of 3-5 nm, both in SASE and<br />

SEEDED FEL configuration. In this paper<br />

we report the progress of the collaboration<br />

together with start to end simulation results<br />

based on a combined scheme of RF compression<br />

techniques and the use of a tunable magnetic<br />

chicane with positive and negative R56<br />

compression.<br />

Status of the SPARC Project<br />

C. Vaccarezza, D. Alesini, M. Bellaveglia, S. Bertolucci, M.E. Biagini,<br />

R. Boni, M. Boscolo, M. Castellano, A. Clozza, G. Di Pirro, A. Drago,<br />

A. Esposito, M. Ferrario, D. Filippetto, V. Fusco, A. Gallo, A. Ghigo,<br />

S. Guiducci, M. Migliorati, L. Palumbo, L. Pellegrino, M.A. Preger,<br />

C. Sanelli, M. Serio, F. Sgamma, B. Spataro, A. Stella, F. Tazzioli,<br />

M. Vescovi, C. Vicario (INFN/LNF) F. Alessandria, A. Bacci, F.<br />

Broggi, C. De Martinis, D. Giove, M. Mauri (INFN/LASA) L. Catani,<br />

E. Chiadroni, A. Cianchi, C. Schaerf (INFN-Roma II) S. Cialdi, C.<br />

Maroli, V. Petrillo, M. Rome, L. Serafini (INFN-Milano) F. Ciocci, G.<br />

Dattoli, A. Doria, F. Flora, G.P. Gallerano, L. Giannessi, E. Giovenale,<br />

G. Messina, P.L. Ottaviani, G. Parisi, L. Picardi, M. Quattromini, A.<br />

Renieri, C. Ronsivalle (ENEA C.R. Frascati) P. Emma (SLAC) M.<br />

Mattioli (Università di Roma I La Sapienza) A. Mostacci (Rome<br />

University La Sapienza) P. Musumeci (INFN-Roma) S. Reiche, J.B.<br />

Rosenzweig (UCLA)<br />

The SPARC Project is starting the commissioning<br />

of its photo-injector. RF gun, RF L. Serafini (INFN-Milano)<br />

sources, RF network and control, power supplies,<br />

emittance meter, beam diagnostics and control to measure the RF gun beam are installed. The photocathode<br />

drive laser has been characterized in terms of pulse shape and quality. We expect to conduct beam measurements<br />

at RF gun exit in the next future and consequently to start the installation of accelerating sections. The design of<br />

the 12 m undulator for the FEL experiment has been completed and the first undulator section out of 6 is under<br />

construction: we expect to characterize it at Frascati ENEA laboratory within the next months. SPARC as a facility<br />

will host FEL experiments using SASE, seeding and non-linear resonant harmonics. Additional R&D on X-band<br />

and S-band structures for velocity bunching are in progress, as well as studies on new photocathode materials and<br />

53<br />

MOPCH027<br />

MOPCH028<br />

MOPCH029

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