Author: Caspers, F.
Paper Title Page
WEYPLS1 Building the Impedance Model of a Real Machine 2249
  • B. Salvant, D. Amorim, S. A. Antipov, S. Arsenyev, M.S. Beck, N. Biancacci, O.S. Brüning, J.V. Campelo, E. Carideo, F. Caspers, A. Farricker, A. Grudiev, T. Kaltenbacher, E. Koukovini-Platia, P. Kramer, A. Lasheen, M. Migliorati, N. Mounet, E. Métral, N. Nasr Esfahani, S. Persichelli, B.K. Popovic, T.L. Rijoff, G. Rumolo, E.N. Shaposhnikova, V.G. Vaccaro, C. Vollinger, N. Wang, C. Zannini, B. Zotter
    CERN, Meyrin, Switzerland
  • D. Amorim
    Grenoble-INP Phelma, Grenoble, France
  • T. Dalascu
    EPFL, Lausanne, Switzerland
  • M. Migliorati
    Sapienza University of Rome, Rome, Italy
  • R. Nagaoka
    SOLEIL, Gif-sur-Yvette, France
  • V.V. Smaluk
    BNL, Upton, Long Island, New York, USA
  • B. Spataro
    INFN/LNF, Frascati, Italy
  • N. Wang
    IHEP, Beijing, People’s Republic of China
  • S.M. White
    ESRF, Grenoble, France
  A reliable impedance model of a particle accelerator can be built by combining the beam coupling impedances of all the components. This is a necessary step to be able to evaluate the machine performance limitations, identify the main contributors in case an impedance reduction is required, and study the interaction with other mechanisms such as optics nonlinearities, transverse damper, noise, space charge, electron cloud, beam-beam (in a collider). The main phases to create a realistic impedance model, and verify it experimentally, will be reviewed, highlighting the main challenges. Some examples will be presented revealing the levels of precision of machine impedance models that have been achieved.  
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About • paper received ※ 10 May 2019       paper accepted ※ 23 May 2019       issue date ※ 21 June 2019  
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