Conveners
Session II: HTS elecromagnetics and HTS quench
- Fedor Gömöry (Slovak Academy of Sciences)
Session II: HTS electromagnetics and HTS quench
- Fedor Gömöry (Slovak Academy of Sciences)
The striation of coated conductors is attracting interests as a means of the reduction of shielding-current-induced fields (SCIFs) in magnets made with coated conductors. We focus on striated and copper-plated coated conductors, in which plated copper allows current sharing between filaments. We characterized their electromagnetic characteristics at three steps, and, through these steps, we...
The research and development on the applications of REBCO superconducting coil to the high field magnets for NMR, MRI, accelerator and so on are in progress. In these application, the magnets need to create highly homogeneous and temporally stable field. However, the screening currents lead to the serious problem in REBCO magnets for the applications required very high field quality. Then,...
High $T_c$ superconductor (HTS) is one of the candidates to evolve the magnet technology as it is superior to low $T_c$ superconductor (LTS) in terms of the critical current density, critical magnetic field, and critical temperature. Replacement of the LTS magnet with the HTS one is however still challenging because it is quite difficult to predict the quench behavior due to its slow normal...
High-temperature superconducting (HTS) magnet is an attractive option for fusion reactors, especially, the LHD-type helical fusion reactor FFHR-d1, which can employ segment-fabrication of huge and complex helical coils. We have proposed both joint-winding of the HTS helical coils wound by connecting half or one-pitch conductor segments and remountable HTS helical coils assembled from...
Design activities of the LHD-type helical fusion reactor FFHR-d1 and -c1 are progressing at NIFS. The high-temperature superconductor (HTS) is a promising option for the helical coil conductors. In addition to high cryogenic stability and low refrigeration power at elevated temperature operations at >20 K, it is proposed that the helical coils of large-diameter and complex-shape be constructed...
If we use coated conductors for accelerator magnets, they might be subject to the transient and localized thermal disturbances caused by beam losses. There are various types of beam losses, but, here, we focus on the direct injections of particle beams to superconducting coils as the most severe event. We are studying the responses of coated conductors against such disturbances.
First, we...
