Speaker
Description
The magnetic measurement of solenoids is based on different methods to characterize the field quality and the magnetic axis. Usually, Hall mappers and stretched-wire systems are used for this task. This paper presents an alternative: a fluxmetric method to measure the radial field dependence and the magnetic axis with a single instrument. The solenoidal-field transducer is based on a disc-shaped induction-coil array with concentric coils and 90 deg. arcs segments mounted on a precision translation stage. This allows to sample the magnet along its axis and to extract both the longitudinal and transverse field components from the nested coils of different diameters. Over the last years the innovations have resulted in a change of paradigm for the design of induction-coil magnetometers and their calibration, up to the point that the printed circuit board technology has become a new standard.
The paper presents the design, development, production challenges, and metrological characterization of the new instruments. Results of recent measurements of a normal and a superconducting solenoid magnet will be given.
