Author: Catani, L.
Paper Title Page
MOPPR024 Non-intercepting Emittance Measurements by means of Optical Diffraction Radiation Interference for High Brightness Electron Beam 831
  • A. Cianchi
    Università di Roma II Tor Vergata, Roma, Italy
  • V. Balandin, N. Golubeva, K. Honkavaara, G. Kube
    DESY, Hamburg, Germany
  • M. Castellano, E. Chiadroni
    INFN/LNF, Frascati (Roma), Italy
  • L. Catani
    INFN-Roma II, Roma, Italy
  Conventional intercepting transverse electron beam diagnostics, e.g. based on Optical Transition Radiation (OTR), cannot tolerate high power beams without remarkable mechanical damages of the diagnostics device. Optical Diffraction Radiation (ODR) is an excellent candidate for the measurements of the transverse phase space parameters in a non-intercepting way. One of the main limitations of this method is the low signal to noise ratio, mainly due to the unavoidable synchrotron radiation background. This problem can be overcome by using ODRI (Optical Diffraction Radiation Interference). In this case the beam goes through two slits opened on metallic foils, placed in a distance shorter than the radiation formation zone. Thanks to the shielding effect of the first screen a nearly background-free ODR interference pattern can be measured allowing the determination of the beam size and the angular divergence. Here we report the first measurements, carried out at FLASH (DESY, Germany), of the beam emittance using ODRI. Our results demonstrate the unique potential of this technique.  
TUOBB01 A European Proposal for the Compton Gamma-ray Source of ELI-NP 1086
  • L. Serafini, I. Boscolo, F. Broggi, V. Petrillo
    Istituto Nazionale di Fisica Nucleare, Milano, Italy
  • O. Adriani, G. Graziani, G. Passaleva
    INFN-FI, Sesto Fiorentino, Italy
  • S. Albergo, A. Tricomi
    INFN-CT, Catania, Italy
  • D. Alesini, M.P. Anania, A. Bacci, R. Bedogni, M. Bellaveglia, C. Biscari, R. Boni, M. Boscolo, M. Castellano, E. Chiadroni, A. Clozza, E. Di Pasquale, G. Di Pirro, A. Drago, A. Esposito, M. Ferrario, A. Gallo, G. Gatti, A. Ghigo, F. Marcellini, C. Maroli, G. Mazzitelli, E. Pace, L. Pellegrino, R. Ricci, M. Serio, F. Sgamma, B. Spataro, A. Stecchi, A. Stella, P. Tomassini, C. Vaccarezza, S. Vescovi, F. Villa
    INFN/LNF, Frascati (Roma), Italy
  • D. Angal-Kalinin, J.A. Clarke, B.D. Fell, A.R. Goulden, J.D. Herbert, S.P. Jamison, P.A. McIntosh, R.J. Smith, S.L. Smith
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  • P. Antici, M. Coppola, L. Lancia, A. Mostacci, L. Palumbo
    URLS, Rome, Italy
  • N. Bliss, B.G. Martlew
    STFC/DL, Daresbury, Warrington, Cheshire, United Kingdom
  • P. Cardarelli, M. Gambaccini
    INFN-Ferrara, Ferrara, Italy
  • L. Catani, A. Cianchi
    INFN-Roma II, Roma, Italy
  • I. Chaikovska, O. Dadoun, A. Stocchi, A. Variola, Z.F. Zomer
    LAL, Orsay, France
  • C. De Martinis
    INFN/LASA, Segrate (MI), Italy
  • F. Druon, P. Fichot
    ILE, Palaiseau Cedex, France
  • E. Iarocci
    University of Rome "La Sapienza", Rome, Italy
  • M. Migliorati
    Rome University La Sapienza, Roma, Italy
  • A.-S. Müller
    IN2P3, Paris, France
  • V. Nardone
    Università di Roma I La Sapienza, Roma, Italy
  • C. Ronsivalle
    ENEA C.R. Frascati, Frascati (Roma), Italy
  • M. Veltri
    Uniurb, Urbino (PU), Italy
  A European proposal is under preparation for the Compton gamma-ray Source of ELI-NP. In the Romanian pillar of ELI (the European Extreme Light Infrastructure) an advanced gamma-ray beam is foreseen, coupled to two 10 PW laser systems. The photons will be generated by Compton back-scattering in the collision between a high quality electron beam and a high power laser. A European collaboration formed by INFN, Univ. of Roma La Sapienza, Orsay-LAL of IN2P3, Univ. de Paris Sud XI and ASTeC at Daresbury, is preparing a TDR exploring the feasibility of a machine expected to achieve the Gamma-ray beam specifications: energy tunable between 1 and 20 MeV, narrow bandwidth (0.3%) and high spectral density, 104 photons/sec/eV. We will describe the lay-out of the 720 MeV RF Linac and the collision laser with the associated optical cavity, as well as the optimized beam dynamics to achieve maximum phase space density at the collision, taking into account beam loading and beam break-up due to the acceleration of long bunch trains. The predicted gamma-ray spectra will be evaluated as the gamma photons collimators background. An option for electron bunches recirculation will also be illustrated.  
slides icon Slides TUOBB01 [5.099 MB]  
THPPR003 Progresses on !CHAOS Development 3969
  • L.G. Foggetta, C. Bisegni, S. Calabrò, P. Ciuffetti, G. Di Pirro, G. Mazzitelli, A. Stecchi
    INFN/LNF, Frascati (Roma), Italy
  • L. Catani, D. Di Giovenale, F. Zani
    INFN-Roma II, Roma, Italy
  !CHAOS(Control System based on Highly Abstracted and Open Structure), the new control system architecture proposed by INFN is in development and some parts of it are now under test on the DAØNE and SPARC complexes. Although the main goal of the !CHAOS project remains the accelerator-based research facility proposed for the Cabibbo Lab and the SuperB accelerator, other applications are under study in order to adapt this new design to the needs coming from different fields, with a growing interest from many companies. Recent developments, tests results, potential applications and future project's plans are presented.