Conveners
WED-OR3-503 Magnet System, Novel and Other Applications
- Gen Nishijima (National Institute for Materials Science)
- philippe fazilleau
We present the integration and initial test of the world’s first superconducting magnet system for Magnetic Density Separation, from coil winding to cryostat assembly as well as first cool-down and energizing. Magnetic Density Separation is a relatively new separation technology that allows the simultaneous sorting of multiple non-magnetic materials based on their mass density by combining a...
We have started to develop a magnetic refrigeration system for hydrogen liquefaction. This system has a superconducting magnet, in which an active magnetic regenerative (AMR) bed moves inside. During steady-state operation, there is a possibility that the superconducting magnet is conduction cooled by the cold of liquefied hydrogen. However, since it is in the development stage, the magnet is...
High-temperature superconducting (HTS) coils and magnet systems are used in various applications today. Despite the great advantages they offer over conventional systems, their commercial success is yet pending. A major obstacle is a high price due to the cost of the HTS tape and the development effort needed to meet very specific requirements.
In various projects, we have developed...
Superconducting magnets are capable of producing exceptionally stable magnetic fields when operating in “persistent current” mode. In this approach, a superconducting switch disconnects the power source from the magnet circuit, allowing the magnet current to flow in a closed superconducting loop free of power supply noise. We present the design, fabrication, and test of a 1.9 T iron-dominated,...
The self-field critical current Ic of 2G high temperature superconducting (HTS) tape can be reduced by applied dc magnetic field. This property can be used in the development of HTS switching elements through so-called Jc(B) switching. The design of a dc magnetic field switch is reported with both single and bifilar configurations. Dc magnetic field is applied by an iron-core field coil with...
Superconducting magnets have been attracting research interest due to their numerous applications, which include accelerator magnets, fusion magnets and superconducting trains. However, as the coils driving the magnets require large currents, the losses in the current leads supplying the coils can be problematic. Power semiconductor devices have shown improved performance at cryogenic...
