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Pace, E.

Paper Title Page
MOPC068 Preliminary Characterization of the Beam Properties of the SPARC Photoinjector 226
 
  • A. Cianchi
    INFN-Roma II, Roma
  • D. Alesini, M. Castellano, E. Chiadroni, L. Cultrera, G. Di Pirro, M. Ferrario, L. Ficcadenti, D. Filippetto, V. Fusco, G. Gatti, B. Marchetti, E. Pace, C. Vaccarezza, C. Vicario
    INFN/LNF, Frascati (Roma)
  • A. Mostacci
    Rome University La Sapienza, Roma
  • C. Ronsivalle
    ENEA C. R. Frascati, Frascati (Roma)
 
  The SPARC photoinjector is the test prototype of the recently approved SPARX project. It is used as R&D facility to perform accurate beam dynamics studies, comparing measurements and simulations. Emittance measurements at the gun exit and at the full energy has been performed and benchmarked with the simulations.  
TUPC105 Slice Emittance Measurements at SPARC Photoinjector with a RF Deflector 1305
 
  • C. Vaccarezza, D. Alesini, E. Chiadroni, G. Di Pirro, M. Ferrario, L. Ficcadenti, D. Filippetto, G. Gatti, B. Marchetti, E. Pace
    INFN/LNF, Frascati (Roma)
  • A. Cianchi
    Università di Roma II Tor Vergata, Roma
  • A. Mostacci
    Rome University La Sapienza, Roma
 
  The SPARC photoinjector is a R&D facility performing beam dynamics studies and driving a SASE-FEL. The RF deflector, completely designed and built by the SPARC team, allows measurements of the longitudinal properties of the beam bunch. Using it and the well know technique of the quadrupoles scan, the slice emittance has been measured in different conditions and benchmarked with the simulations.  
WEPC075 Recent Results and Future Perspectives of the SPARC Project 2169
 
  • M. Ferrario, D. Alesini, M. Bellaveglia, 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, B. Marchetti, A. Marinelli, C. Marrelli, E. Pace, L. Palumbo, L. Pellegrino, R. Ricci, U. Rotundo, C. Sanelli, F. Sgamma, B. Spataro, F. Tazzioli, 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
    INFN-Milano, Milano
  • M. Bougeard, B. Carré, D. Garzella, M. Labat, G. Lambert, H. Merdji, P. Salieres, O. Tchebakoff
    CEA, Gif-sur-Yvette
  • L. Catani
    INFN-Roma II, Roma
  • A. Cianchi
    Università di Roma II Tor Vergata, Roma
  • F. Ciocci, G. Dattoli, 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. Migliorati, A. Mostacci
    Rome University La Sapienza, Roma
  • M. Petrarca
    Università di Roma I La Sapienza, Roma
  • 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 various configurations, a Thomson backscattering source and a plasma accelerator experiment. The SPARC photoinjector is also the test facility for the recently approved VUV FEL project named SPARX. As a first stage of the commissioning a complete characterization of the photoinjector has been accomplished with a detailed study of the emittance compensation process downstream the gun-solenoid system and the demonstration of the emittance oscillation in the drift. 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 and the demonstration of the “velocity bunching” technique in the linac. In this paper we report the experimental results obtained so far and the scientific program for the near future.  
TUPC008 Beam Diagnostics with IR Light Emitted by Positron at DAΦNE 1056
 
  • A. Bocci, A. Clozza, A. Drago, A. G. Grilli, A. Marcelli, A. R. Raco, R. S. Sorchetti
    INFN/LNF, Frascati (Roma)
  • A. De Sio, L. Gambicorti, E. Pace
    Università degli Studi di Firenze, Firenze
  • E. P. Emanuele
    Università degli Studi di Firenze, Firenze
  • M. P. Piccinini
    Università Roma Tre, Roma
  • J. P. Piotrowski
    Vigo System Sa, Warsaw
 
  Real-time beam diagnostics is mandatory in accelerators and represents one of the most challenging issues of modern storage rings and future FEL's. Recently, compact mid-IR fast uncooled photo-detectors have been used at DAΦNE to monitor single e- bunches using the SINBAD IR beamline installed on the e- ring*. Electron bunches have a FWHM of 150-300 ps and are separated by 2.7 ns**. Detectors performances are then suitable for a compact and low cost bunch-by-bunch longitudinal diagnostic device. To improve the DAΦNE diagnostic a bending magnet SR port on the e+ ring has been set-up with a HV chamber, a gold-coated plane mirror and a ZnSe window. To collect the SR light and focus radiation on IR detectors allowing the diagnostic of e+ a compact optical system has been installed in air after the window. Here we will present the status of the apparatus, the source characteristics, the optical setup and the complete acquisition system. This IR port will allow comparison in the ns time domain between data collected on both rings, and could be also used to improve DAΦNE diagnostics, i.e., identify and characterize bunch instabilities and/or increase the current in the e+ ring.

*M. Cestelli Guidi et al. J. Opt. Soc. Amer. A 22, 2810 (2005).
**A. Bocci et al. NIM-A, 580, 190 (2007).