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Peripheral Energy Markets
Published in Anco S. Blazev, Global Energy Market Trends, 2021
Superconducting magnetic energy storage (SMES) systems store energy in a magnetic field. This field is created by the flow of direct current (DC) electricity into a super-cooled coil. In low-temperature superconducting materials, electric currents encounter almost no resistance, so they can cycle through the coil of superconducting wire for a long time without losing energy.
Nuclear Magnetic Resonance
Published in Grinberg Nelu, Rodriguez Sonia, Ewing’s Analytical Instrumentation Handbook, Fourth Edition, 2019
Advancements in magnet technology gave rise to modern superconducting systems. A superconducting magnet may be described as an electromagnet made from superconducting wire. Because superconducting wire can conduct much larger electric currents than ordinary wire, very strong magnetic fields can be created. Superconducting magnets have a number of advantages over resistive electromagnets. First, they can achieve an order of magnitude in field strength over ordinary ferromagnetic-core electromagnets. Second, the field is generally more stable, resulting in less noise in experimental measurement. Third, superconducting magnet operation does not require expensive consumption of electrical power and cooling water needed for maintenance of electromagnets. Today, NMR spectrometers include superconducting magnets upwards of 4.7 Tesla (200 MHz). Typically NMR magnets range in field strength from approximately 6 to 23.5 T.
Magnetism
Published in Daniel H. Nichols, Physics for Technology, 2019
Generating magnetic fields using standard electromagnets is limited because the field strength is proportional to the current. The higher the current, the greater the heating of the wire, P = I 2R. Big electromagnets need to be cooled with water. To obtain higher magnetic fields, a superconducting wire is used instead of copper wire. Superconducting wire generates virtually no heat. The only problem with it is that it has to be cooled to very low temperatures using liquid nitrogen or helium and it requires a costly cryogenic system (Figure 14.11).
Likely U.S. Regulatory Considerations for D-T Fusion Power Reactors
Published in Fusion Science and Technology, 2020
Robert L. Hirsch, Gerald L. Kulcinski, Doug Chapin, Herman Diekamp
Superconducting magnets represent marvelous technology, providing high-steady-state magnetic fields via special conducting wire/cables, charged once with direct-current (dc) electric power after which they are trickle charged for lead losses. Superconducting magnets are widely used in MRI devices, particle accelerators, and various laboratory equipment. Today’s technology demands continuous cooling with liquid helium to maintain the magnets below the critical temperatures of the superconducting wire/cables, housed in special insulating dewars.