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Keynote session on Wire sensor methods for measuring field harmonics, gradients and magnetic axes in accelerator magnets
Carlo Petrone
Magnetic Measurement group
European Organization for Nuclear Research (CERN)
Geneva, Switzerland


In particle accelerators, the beam stability is affected by magnetic field in-homogeneity in the bending and focusing magnets. Therefore, a high field quality characterized by the harmonic coefficients, usually denoted as field multipoles , of the transverse field expansion, is required. The talk will deal with a complete overview of the magnetic field measurement sensors used at CERN will be firstly illustrated and the theoretical models and experimental results for the use of wire sensors for magnetic measurements will be exploited. The magnetic field measurement challenges arising from accelerator magnets with small apertures (few mm) where the application of the classical measurement methods comes to its limits.
Wire-sensors methods open a new frontier for characterizing magnetically magnets in future particle accelerator projects, and for measuring the position of the magnetic axis in the micrometre range.


Carlo Petrone took MD and PhD in Telecommunication Engineering at University of Sannio (Italy) in the framework of a collaboration with the Magnetic Measurement group at European Organization for Nuclear Research (CERN), where now is working. In last six years, his main research interests include magnetic measurement for particle accelerator based principally on wire sensors. In these fields, he published several scientific papers in journals and international conference proceedings and he was awarded in 2012 at IMEKO World Conference for 2 best papers.