Magnetic Measurements Using Hall Probe on the Vertical Corrector Magnets for HESR

The High Energy Storage Ring (HESR), a key component of the Facility for Antiproton and Ion Research (FAIR), includes, among other types of magnets, several hexapole magnets for chromatic aberration correction and several steerer corrector magnets for vertical and horizontal beam deviation. The present article focuses on the analysis of these corrector magnets. In close collaboration with Forschungszentrum Jülich (FZJ), Germany, the Romanian National Institute for Research and Development in Electrical Engineering – Advanced Research (ICPE-CA) has designed both the hexapole and the corrector magnets. Following approval of the design by FZJ and FAIR, ICPE-CA initiated the manufacturing and testing phase. Magnetic field measurements were performed using a Hall probe inserted into the magnet aperture and positioned by means of a custom-built XYZ system. This paper presents the measurement procedure, the results obtained, and the corresponding simulations of the steerer magnets, along with a detailed analysis of one HESR magnet, namely the vertical corrector magnet. To validate the measurements, a comparison was carried out between analytical predictions, numerical simulations, and magnetic measurements.