A recent article in the IEEE Transactions on Applied Superconductivity describes the use of Metrolab's Hall Magnetic Camera HMC9076 to map a curved dipole magnetA magnet with two poles, a north and a south, separated by a gap. As opposed to a multipole or...:
J. H. Hetzel et al., "Development of a Field Mapper for the Determination of the Multipole Components of the Curved HESR Dipole Magnets," in IEEE Transactions on Applied Superconductivity, vol. 28, no. 3, pp. 1-4, April 2018.
The high-energy storage ring (HESR) will comprise various normal-conducting magnets, in particular 44 dipole magnets each with a length of 4.2 m and a curvature providing the optimum good-field region for antiprotons with a maximum momentum of 15 GeV/c. All the dipole magnets have already been manufactured and delivered. For their quality controlAn NMR-controlled field is one whose strength is monitored by NMR. As opposed to NMR-regulated.... a field mappingThe process of measuring magnetic field intensity at many different points, in order to understand the structure of the field... device has been designed and built, which can be moved automatically along the curved central particle trajectory in order to measure the magnetic fields on a reference radius. From these data, we are able to extract the local multipole components at the required field strengths. Here, we focus on the design of this field mapper and present an example of a field measurement, which will be applied to a subset of the HESR dipole magnets.
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