Conveners
Session VI: HTS magnet and HTS applications
- Marco Breschi (University of Bologna)
Session VI: HTS magnet and HTS applications
- Marco Breschi (University of Bologna)
In order to reduce the electricity consumption of rapid cycling synchrotrons, we are studying the feasibility of superferric magnets using high Tc superconductors (HTS). Because magnets for rapid cycling synchrotrons are required to generate time-dependent magnetic fields, the ac loss reduction of HTS coils as well as the magnetization loss reduction of iron yokes is one of the key issues. In...
The irregular field due to the screening current in high-temperature superconducting (HTS) tapes can bring about fatal impacts on the spatial and temporal uniformity of the magnetic field in MRI and NMR magnets using HTS tape wires. Although numerical evaluation is necessary to deal with the irregular field, accurate numerical computation of the irregular field in HTS coils requires huge...
A screening current is one of serious problems for real applications of REBCO magnets. A screening current deteriorates a magnetic field generated by REBCO magnets, hence it is desired to simulate a screening current-induced magnetic field. Researchers have already proposed a few kinds of simulation methods. For example, a finite element method coupling with thin film approximation method...
One of critical issues for HTS transformer application is AC loss in the HTS windings. Accurate prediction of AC loss is therefore very important for the HTS transformer application. In this work, we present AC loss simulation results employing the H-formulation and homogenization method for a HTS 1 MVA 3-phase transformer demonstrated by Robinson Research Institute in New Zealand. The high...
We have developed the REBCO pancake coils reinforced by an outer-shell structure, which consists of outer/inner rings and a circular disc, so called “YOROI” structure. In this case, the circular disc reinforces the coil together with the outer ring. The stress distribution in the coil, the outer ring and the circular disc can be calculated analytically if the infinite cylinder structure is...
Cable-In-Conduit Conductors (CICCs) for fusion magnets are subjected to fast changing magnetic fields during the plasma-operating scenario. In order to anticipate to the limitations of the conductors under the foreseen operating conditions, it is essential to have a quantitative assessment of the stability margin of the magnets. In the last decade ITER has launched a campaign for...
