A methodology is proposed for optimal shaping of permanent magnets with non-conventional and complex geometries, used in synchronous motors. The algorithm includes artificial neural network-based surrogate model and multi-objective search based optimization method that will lead to Pareto front solutions. An interior permanent magnet topology with crescent-shaped magnets is also introduced as t...

During the seven-year construction of the Relativistic Heavy Ion Collider (RHIC), more than 1700 superconducting dipoles, quadrupoles, sextupoles, and multi-layer correctors have been constructed and installed. These magnets have been sorted at several production stages to optimize their performance and reliability. For arc magnets, priorities have been put first on quench performance and opera...

We present an approach for compensating adverse effects of the detector solenoid in the SuperB Interaction Region (IR). We place compensating solenoids around the IR quadrupole magnets to reduce the magnetic fields nearly to zero. This allows more operational headroom for superconducting IR magnets and avoids saturation of ferric IR magnets. We place stronger compensating solenoids between IR m...

Each stage of an accelerator system has a limited dynamic range and therefore a chain of stages is required to reach high energy. A combination of septa and kicker magnets is frequently used to inject and extract beam from each stage. The kicker magnets typically produce rectangular field pulses with fast riseand/or fall-times, however, the field strength is relatively low. To compensate for th...

Foreign body ingestion is a common problem in children. Ingested foreign bodies include coins, needles, pins and button batteries. Ingestion of multiple magnets is very rare and poses a unique hazard of intestinal obstruction in children. The ingested magnets may reside in different loops of intestine and attract each other causing necrosis of the intervening wall of intestine. We present the c...

The theory of spin superradiance, developed earlier for nuclear magnets, is generalized to a wider class of spin systems, such as granular magnets and molecular magnets. The latter may possess strong single-site magnetocrystalline anisotropy, whose role in nonlinear spin dynamics is analysed. Transient as well as pulsing superradiant regimes are described. These coherent regimes may be employed...

Among the few foreign bodies swallowed, multiple magnets are very rare. Ingestion of Multiple Magnets may lead to a number of dire complications. The present case report is about the ingestion of multiple singing magnets by 4-year-old child leading to intestinal segmental necrosis and perforations.

We have been developing superconducting wires and magnets for over 40 years and decided to focus on the NMR field in the early 1990s. Japan Superconductor Technology Inc., established in 2002, has successfully applied the R&D achievement of Kobe Steel to their production of superconducting wires and magnets. This article describes developments in superconducting wires and magnets with focus on ...

This paper introduces the concept of ring magnets for magnetic beads (MBs) trapping in a capillary. Such magnets enable an easy insertion of a capillary simply like a pearl on a string. With this system, high magnetic forces are obtained thanks to the proximity between the magnet and the capillary, giving the opportunity to work at higher flow rates than with classical setups using two magnets ...