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Title: The magnetic field model of the large hadron collider : overview of operation at 3.5 and 4 TEV
Authors: Todesco, Ezio
Aquilina, N.
Fiscarelli, Lucio
Garcia Tomás, R.
Giovannozzi, Massimo
Hagen, Per
Lamont, Mike
Maclean, E.
Redaelli, Stefano
Schmidt, Frank
Strzelczyk, Marek
Walckiers, Louis
Wenninger, Jorg
Sammut, Nicholas
Keywords: Large Hadron Collider (France and Switzerland)
Magnetic fields
Particle accelerators
Tellurium compounds
Colliders (Nuclear physics)
Issue Date: 2012
Publisher: JACoW
Citation: Todesco, E., Aquilina, N., Fiscarelli, L., Garcia Tomás, R., Giovannozzi, M., Hagen, P.,... & Sammut, N. (2012). The magnetic field model of the large hadron collider: Overview of operation at 3.5 and 4 TeV. 3rd International Particle Accelerator Conference 2012, New Orleans. 2194-2196
Abstract: The magnetic model of the LHC is based on a fit of the magnetic measurements throughequations that model the field components (geometric, saturation, persistent) at differentcurrents. In this paper we will review the main results related to the magnetic modelduring the run of the LHC in 2010-2011: with a top energy of 3.5 TeV, all components of themodel but the saturation are visible. We first review the main results relative to thedecay at injection plateau, dependence on powering history, and snapback at the beginningof the ramp for both tune and chromaticity. We discuss the precision obtained in trackingthe magnets during the ramp, where the persistent current components gradually disappear.We conclude by presenting the behaviour of the quadrupoles model during the squeeze.
ISBN: 978-395450115-1
Appears in Collections:Scholarly Works - FacICTMN

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