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Title: The magnetic model of the LHC in the early phase of beam commissioning
Authors: Todesco, Ezio
Aquilina, N.
Auchmann, Bernhard
Bottura, Luca
Buzio, Marco
Chritin, R.
Deferne, Guy
Deniau, Laurent
Fiscarelli, Lucio
Hagen, Per
Garcia Perez, Juan
Giovannozzi, Massimo
Lamont, Mike
Montenero, G.
Muller, Gabriel
Pereira, M.
Redaelli, Stefano
Remondino, Vittorio
Sammut, Nicholas
Schmidt, Frank
Steinhagen, Ralph
Strzelczyk, Marek
Tomas, Rogelio
Venturini Delsolaro, Walter
Wenninger, Jorg
Wolf, Ronald M.
Keywords: Large Hadron Collider (France and Switzerland)
Magnetic fields
Issue Date: 2010
Publisher: IPAC
Citation: Todesco, E., Aquilina, N., Auchmann, B., Bottura, L., Buzio, M., Chritin, R.,… Wolf, R. (2010). The magnetic model of the LHC in the early phase of beam commissioning. International Particle Accelerator Conference (IPAC10), Kyoto.
Abstract: The relation between field and current in each family of the Large Hadron Collider magnets is modelled with a set of empirical equations (FiDeL) whose free parameters are fit on magnetic measurements. They take into account residual magnetization, persistent currents, hysteresis, saturation, decay and snapback during initial part of the ramp. Here we give a first summary of the reconstruction of the magnetic field properties based on the beam observables (orbit, tune, coupling, chromaticity) and a comparison with the expectations. The most critical issues for the machine performance in terms of knowledge of the relation magnetic field vs current are pointed out.
Appears in Collections:Scholarly Works - FacICTMN

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