Finite Element Analysis of Magnetic Field Single-Turn Systems
Modelling of pulsed magnetic systems has extensive application in the optimisation of electromagnetic metal forming as well as in pulsed ultrahigh field generation systems. This paper presents a detailed three-dimensional finite element analysis model to be used in such power systems and compares simulated solutions with accurate experimental data.
Megagauss magnetic field generation in single-turn coils: new frontiers for scientific experiments
We report on the design and performance of a megagauss generator at the Humboldt High Magnetic Field Centre. The installation uses the fast capacitor discharge into single-turn coils to produce microsecond pulses of 260 T in 8 mm diameter suitable for low-temperature experiments and 310 T in 5 mm diameter. Simple concepts are applied to substantiate crucial design principles for the generator and the choice of components. The implementation of a high-power/low-inductance circuit operated at 60 kV and other technical questions are discussed in detail. The analysis of experimental field and current data is based on numerical simulations of the magnetic pressure and the nonlinear flux diffusion. It was carried out in order to investigate the limitations and characteristics of the Berlin generator in particular and the single-turn coil technique in general. The paper focuses primarily on field, generator and coil parameters, which can be used for performing routine, reproducible scientific experiments at low temperatures.
High sensitivity data acquisition during strong transient electromagnetic fields
Abstract The 225 kJ 60 kV single-turn coil equipment that recently went into full operation in Berlin, makes it possible to work with magnetic fields above 200 T in a volume of about 1 cm 3 . The generation of such high magnetic fields take place on a μs-time scale and is therefore connected with very strong transient electromagnetic pulses, which considerably complicate the measuring procedure. This paper describes the techniques used to record data while taking optical measurements in the infrared range.