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Ficcadenti, L.

Paper Title Page
TUPPH040 A Hybrid Standing Wave-Traveling Wave Photoinjector 334
 
  • A. Fukasawa, H. Badakov, B. D. O'Shea, J. B. Rosenzweig
    UCLA, Los Angeles, California
  • D. Alesini, L. Ficcadenti, B. Spataro
    INFN/LNF, Frascati (Roma)
  • L. Palumbo
    Rome University La Sapienza, Roma
  
  We present here the RF aspects and beam dynamics study of a hybrid photoinjector, where the cathode section is standing wave, and the section downstream of the third (coupling) cell is traveling wave. This device has strong RF advantages: there is a single feed, mitigating expense, and there is a nearly complete suppression of reflected power during the SW section fill. This, critically, allows one to scale these devices to higher field and frequency, which should dramatically improve beam brightness. Further, the beam dynamics are fundamentally changed, as the TW section acts as a velocity buncher. Thus one may produce low emittance, >kA beams at 20-30 MeV from such a device. We discuss here results of detailed beam dynamics simulations, RF design and initial cold-testing, and preparations for high power testing.  
TUPPH048 Recent Results of the SPARC Project 359
 
  • 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, A. Marcelli, B. Marchetti, M. Migliorati, A. Mostacci, 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
    Istituto Nazionale di Fisica Nucleare, 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, 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
  • A. Marinelli, J. B. Rosenzweig
    UCLA, Los Angeles, California
  • M. Mattioli, M. Petrarca, M. Serluca
    INFN-Roma, Roma
  • J. Rossbach
    Uni HH, Hamburg
  
  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. 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 emission radiation in the SPARC undulators. In this paper we report the experimental results obtained so far.