We describe the development and characterization of a three-dimensional (3D) magnetic coil system that is able to produce magnetic flux densities of up to 2 mT in an arbitrary field direction. The coil system can be used to calibrate 3D magnetometers efficiently, and the measurements are traceable to national SI units.

Traceably calibrated scanning Hall microscopy (SHM) is a versatile tool for the quantitative characterization of magnetic microstructures. To enable SHM with a resolution in the micrometer range under ambient conditions, two Hall sensor materials, gold and graphene, were investigated. A SHM setup utilizing a 5 μm gold Hall sensor was calibrated. The field sensitivity and the detailed uncertainty budget are discussed. The presented traceable calibration is validated by comparison to simulations.

Electromagnetic coils are ubiquitously used in the modern world in motors, antennas, etc. In numerous applications, like nuclear magnetic resonance spectroscopy and imaging (known as MRI), there is a strong need for a homogeneous magnetic field. In this paper, we take advantage of an analytic method to propose a new design of MRI coils with enhanced sensitivity and homogeneity.

The High-Luminosity Large Hadron Collider (HL-LHC) project at CERN will require new superconducting magnets with strict requirements in terms of field quality. A new measurement system based on rotating coils has been developed to characterize them with high accuracy. The system measures the required quantities in a single run, which greatly reduces the necessary time and resources. Thanks to its versatility, it can be adapted to a variety of magnet sizes without major effort.

This paper addresses the development and characterization of a non-intrusive silicon-based microsensor, which can detect electric partial discharges in electrical insulation equipment. Early partial discharge detection prevents failures and can be used to optimize maintenance operations. The main advantage of the proposed CMOS-based design resides in its monolithic integration added to the high autonomy, which improves the microsensor efficiency.