Ramp rate sensitivity in superconducting dipole magnets has been shown to vary in an unpredictable fashion between magnets constructed using similar fabrication techniques. Test results from a series of model magnets are presented, one of which was constructed using ebanolcoated strands. The ramp rate sensitivity and ac loss observed is described.

A 24-year-old female with a history of major depressive disorder, borderline personality disorder, and post-traumatic stress disorder presented complaining of worsening abdominal pain over the last 48 h. She reported previously watching an episode of a television medical drama in which a patient swallowed magnets and found out this was very dangerous. She then tried this herself and swallowed m...

In a surface-mounted sintered NdFeB permanent-magnet generator, the magnets are usually thin (typically 4 mm), and hence the armature reaction, due to the time harmonics in the stator currents, is high. NdFeB magnets are conducting (resistivity typically 1.6 μΩm) and experience eddy-current losses. Therefore, the combined eddy-current losses in the NdFeB magnets and a solid iron rotor may becom...

The roadmap to fusion electricity of the European scientific program aims at realization future DEMOnstration (DEMO) power plant. In 2020, pre-concept design phase DEMO was completed, defining concept and characteristics main magnets structures machine. Sixteen toroidal D-shaped magnets, six poloidal annular coils a central solenoid constitute functioning system core. reactor is subjected huge ...

superconducting materials are capable of trapping extremely high magnetic fields. this property and meissner effect of superconductors causes a levitation force between bulk superconductors and a permanent magnet (pm). this levitation force has possible industrial applications such as permanent magnet guideways (pmg). because of the high price of permanent magnets, the optimization of pmg desig...

Magnetic bearings are an attractive alternative to mechanical bearings in flywheel energy storage systems since they greatly reduce friction and wear. However, new problems are introduced in terms of stabilization; particularly the magnetic bearing must provide enough damping to reduce excessive vibrations. Two novel configurations of passive magnetic bearings are introduced to meet system requ...

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...