• S. Tomassini, C. Biscari, R. Boni, M. Esposito, A. Ghigo, L. Palumbo, C. Vaccarezza
  INFN/LNF, Frascati (Roma)
• M. Del Franco, L. Giannessi
  ENEA C.R. Frascati, Frascati (Roma)
• C. Quaresima
  ISM-CNR, Rome

The SPARX-FEL project consists in an X-ray-FEL facility which aim is the generation of electron beams characterized by ultra-high peak brightness at the energy of 1.5 and 2.4 GeV. This facility will be built in the Tor Vergata University area in Rome. The paper describe the engineering aspects of the mechanical design of the accelerator, photo-injector, LINACs, bunch compressors, beam distribution, undulators and experimental stations. Morover the integration of accelerator with the civil infrastractures is discussed.

• M. Quattromini, M. Del Franco, L. Giannessi
  ENEA C.R. Frascati, Frascati (Roma)

In this paper the Fast Multipole Approximation is described with regard to the problem of modelling self fields effects in low emittance, high brightness electron beams of interest for future accelerators and light sources. This well established technique is known to scale as O(N) or O(N log N) (depending on details of the implementation) with the number of particles involved in the simulation. Performances and results as a standalone technique or as a method for for fast calculation of boundary conditions together with other approaches based on PDEs are discussed, along with details of a parallel implementation in the tracking code Tredi.

• M. Ferrario, D. Alesini, M. Bellaveglia, M. Benfatto, R. Boni, M. Boscolo, M. Castellano, E. Chiadroni, A. Clozza, L. Cultrera, G. Di Pirro, A. Drago, A. Esposito, L. Ficcadenti, D. Filippetto, V. Fusco, A. Gallo, G. Gatti, A. Ghigo, A. Marcelli, A. Marinelli, C. Marrelli, M. Migliorati, A. Mostacci, E. Pace, L. Palumbo, L. Pellegrino, R. Ricci, U. Rotundo, C. Sanelli, F. Sgamma, B. Spataro, S. Tomassini, C. Vaccarezza, M. Vescovi, C. Vicario
  INFN/LNF, Frascati (Roma)
• A. Bacci, I. Boscolo, F. Broggi, F. Castelli, S. Cialdi, C. De Martinis, D. Giove, C. Maroli, V. Petrillo, A.R. Rossi, L. Serafini
  Istituto Nazionale di Fisica Nucleare, Milano
• M. Bougeard, B. Carré, D. Garzella, M. Labat, G. Lambert, H. Merdji, P. Salières, O. Tchebakoff
  CEA, Gif-sur-Yvette
• L. Catani, A. Cianchi, B. Marchetti
  INFN-Roma II, Roma
• F. Ciocci, G. Dattoli, M. Del Franco, A. Dipace, A. Doria, G.P. Gallerano, L. Giannessi, E. Giovenale, G.L. Orlandi, S. Pagnutti, A. Petralia, M. Quattromini, C. Ronsivalle, E. Sabia, I.P. Spassovsky, V. Surrenti
  ENEA C.R. Frascati, Frascati (Roma)
• M.-E. Couprie
  SOLEIL, Gif-sur-Yvette
• M. Mattioli, M. Serluca
  INFN-Roma, Roma
• M. Rezvani Jalal
  University of Tehran, Tehran
• J.B. Rosenzweig
  UCLA, Los Angeles, California

The SPARC project foresees the realization of a high brightness photo-injector to produce a 150-200 MeV electron beam to drive 500 nm FEL experiments in SASE, Seeding and Single Spike configurations. The SPARC photoinjector is also the test facility for the recently approved VUV FEL project named SPARX. The second stage of the commissioning, that is currently underway, foresees a detailed analysis of the beam matching with the linac in order to confirm the theoretically prediction of emittance compensation based on the “invariant envelope” matching , the demonstration of the “velocity bunching” technique in the linac and the characterisation of the spontaneous and stimulated radiation in the SPARC undulators. In this paper we report the experimental results obtained so far. The possible future energy upgrade of the SPARC facility to produce UV radiation and its possible applications will also be discussed.

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