Author: Marcellini, F.
Paper Title Page
MOPPR023 Stripline BPM with Integral In-Vacuo Termination 828
  • A. Stella, A. Ghigo, V.L. Lollo, F. Marcellini, M. Serio
    INFN/LNF, Frascati (Roma), Italy
  We report the design and realization of a stripline type beam position monitor to be used in the SPARC LAB transfer lines. While the directional properties provided by matched termination at the downstream end are not strictly required in a transfer line, yet matched loads at the end of the stripline electrodes are preferable to reduce the loss factor and to avoid unwanted reflection to the detection electronic. The Integration of a matched resistive load inside the vacuum chamber allows to halve the number of UHV feedthroughs.  
WEPPP074 Study of a Wideband Feedback Kicker for the SPS 2882
  • S. De Santis, Z. Paret, A. Ratti
    LBNL, Berkeley, California, USA
  • A. Gallo, F. Marcellini
    INFN/LNF, Frascati (Roma), Italy
  Funding: Work supported by the US Department of Energy under Contracts DE-AC02-05CH11231 and DE-AC02-76SF00515, and through the US LHC Accelerator Research Program (LARP).
The LHC luminosity upgrade currently being planned at CERN depends in large measure on a successful upgrade of its injectors chain. In particular the storing of higher currents in the SPS presents a significant challenge from the point of view of the beam stability. Electron cloud driven and transverse mode-coupled instabilities can disrupt the stored beam to the point of making injection in the LHC impossible. These types of instabilities are characterized by fast growth times and substantial spectral components at high frequency. Therefore a key aspect of any feedback system capable of effectively controlling the instability growth is the development of a suitable kicker with a high frequency response. In this paper we investigate the technologies available for such a kicker and identify a possible solution to be implemented on the SPS. By combining a lower frequency stripline kicker with a high frequency module, such as a damped cavity or a slotted waveguide, it would be possible to provide shunt impedances around 1000 Ω on a bandwidth from DC to 1 GHz. The basic parameters and limits of such a solution are discussed.
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.  
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