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TY - CONF AU - Campmany, J. AU - Marcos, J. AU - Massana, V. ED - Petit-Jean-Genaz, Christine ED - Arduini, Gianluigi ED - Michel, Peter ED - Schaa, Volker RW TI - Determination of Magnetic Multipoles using a Hall Probe J2 - Proc. of IPAC2014, Dresden, Germany, June 15-20, 2014 C1 - Dresden, Germany T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - In this work we present a method that allows determining the harmonic content of the magnetic field generated by an accelerator magnet using a Hall probe bench. The method is based on measuring the three components of the magnetic field on a cylindrical surface parallel to the longitudinal axis of the magnet. Such a measurement is accomplished by carrying out a series of on-the-fly scans for a series of straight lines whose transversal coordinates lay on a circle. The Fourier decomposition of the magnetic field along a circle at a given longitudinal position yields the harmonic terms of the field at a reference radius equal to the circle’s radius. As a result the method provides the longitudinal dependence of the harmonic terms, and in particular it allows analyzing their behavior in the fringe field region. We present an example of the application of this method to the measurement of a quadrupole of the Storage Ring of ALBA. A comparison with the integrated results provided by a rotating coil bench is also shown. PB - JACoW CP - Geneva, Switzerland SP - 4025 EP - 4027 KW - multipole KW - quadrupole KW - insertion KW - insertion-device KW - synchrotron DA - 2014/07 PY - 2014 SN - 978-3-95450-132-8 DO - 10.18429/JACoW-IPAC2014-THPRI105 UR - http://jacow.org/ipac2014/papers/thpri105.pdf ER -