High Field Magnets
"This layer-wound coil and earlier prototype pancake-wound coils demonstrate that REBCO coated conductors have developed into a suitable basis for a new superconducting magnet technology that allows major advances in magnetic field generation at 4.2 K, which will truly be transformational. With its low anisotropy and high irreversibility field at temperatures well above 50 K, this REBCO conductor may also allow cryocooled magnet technology for generating fields of 5 – 15 T in the 30 – 50 K range. Substantial advances in REBCO coated conductors have been made in the recent years and SuperPower Inc., a world leader in REBCO coated conductor manufacturing, operates at the forefront of this exciting technology."
Dr. Ulf Peter Trociewitz Associate Scholar/Scientist
ASC, Scientific Staff
NHMFL, Florida State University, Tallahasee, FL
High field magnets serve two purposes: 1) as demonstrators of superconductivity’s ability to create increasingly powerful magnetic fields, which can then be applied to industrial applications, and 2) for development of ultra-high field magnets that are used in research tools in a variety of scientific disciplines.
A superconducting magnet requires little to no electricity after it is brought to full field because it is made from a conductor that carries electric current without resistance as long as the magnet receives a steady supply of cryogens such as liquid nitrogen or liquid helium. Superconducting magnets make possible such applications as maglev trains, electrical ships, NMR and other high energy physics research tools, and industrial motors and generators.
A sampling of groundbreaking results achieved with the use of SuperPower® 2G HTS wire:
A research team at the National High Magnetic Field Laboratory (NHMFL) at Florida State University reached a new world record in magnetic field generation, successfully testing a superconducting electromagnet to a field of 35.4 Tesla. The new record was achieved with a layer-wound insert magnet constructed with a single piece of SuperPower 2G HTS wire approximately 100 meters in length. NHMFL “nested” an YBCO coil inside a 31 Tesla resistive magnet with an “insert” YBCO coil supplying the additional 4.4 Tesla. [Read more]
The World’s first use of HTS magnets on a tokamak was announced in October 2011 with a groundbreaking experiment leading the way to faster development of fusion. Fusion research company Tokamak Solutions worked with partners at Oxford Instruments, the Czech Technical University and Institute of Plasma Physics, Prague to use HTS magnets on a tokamak for the first time. High temperature superconductors have remarkable properties: they conduct electricity with zero resistance, even with simple cooling by liquid nitrogen; they can withstand high magnetic fields and huge current densities – and we now know that they continue to be superconducting throughout the plasma pulse in a tokamak. It has long been known that high temperature superconductors could have an important role to play in the future of tokamak fusion research, but this is the first time they have actually been used for magnetic field coils on a tokamak. [Read more]
SuperPower, in collaboration with NHMFL, demonstrated a new world record of 27.4 Tesla for a field created by a superconducting magnet. A high field magnet coil fabricated by SuperPower with its 2G HTS wire and tested at NHMFL breaks another world record: magnetic field of 27.4 Tesla at 4.2K in 19.89 Tesla background field.
“We are now confident that this conductor technology can be used to construct an all-superconducting magnet with fields in excess of 30 Tesla. This is a huge gain over niobium-based superconducting magnets that are only operational to 23.5 Tesla."
Director, Applied Superconductivity Center and Chief Materials Scientist, NHMFL Florida State University, Tallahassee, FL
August 18, 2009
A coil fabricated by National High Magnetic Field Laboratory (NHMFL) with SuperPower 2G HTS Wire was tested at 4.2K in 31 Tesla background field at NHMFL and achieved a new world record of 33.6 Tesla at an average winding current density of 459 A/mm2.
An HTS magnet coil fabricated by SuperPower with SuperPower® 2G HTS Wire and tested by NHMFL researchers, generated 26.8 Tesla in a background field of 19 Tesla at 4.2 Kelvin. At the time, this world-record field was more than 1.8 Tesla higher than the previous highest field of 25.0 Tesla that was achieved using a 1G coil in 2003.
Significance of this achievement:
... the mark of excellence
SuperPower Inc. is subsidiary
of Furukawa Electric Co., Ltd.
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