Magnetics Business & Technology - Summer 2015 - (Page 16)
MAGNETS, MATERIALS & ASSEMBLIES
New Superconducting Magnet Achieves
A superconducting magnet developed and fabricated at DOE's
Fermi National Accelerator Laboratory reached its design field of
11.5 Tesla at a temperature nearly as cold as outer space. It is the
first successful twin-aperture accelerator magnet made of niobium3-tin in the world.
Niobium-3-tin, or Nb3Sn, is brittle and requires high-temperature processing. Scientists only could achieve the latest milestone after decades of worldwide R&D efforts both in the Nb3Sn
conductor itself and in associated magnet technologies.
Superconducting magnets are at the heart of many particle
accelerators for fundamental science and have other scientific
and technological applications. Because of
Nb3Sn's stronger superconducting properties,
the alloy enables magnets of larger field than
any in current particle
accelerators. As a comparison, the niobiumtitanium dipole magnets
built in the early 1980s This accelerator magnet made of
for the Tevatron particle niobium-3-tin produced a record field of
collider produced about 11.5 Tesla.
4 Tesla. The most powerful niobium-titanium magnets used in the Large Hadron Collider
operate at roughly 8 Tesla. The new niobium-3-tin magnet creates
a significantly stronger field.
The advancements in Nb3Sn magnet technology and the ongoing
US collaboration with CERN on the development of these and other
Nb3Sn magnets are enabling the use of this innovative technology
for future upgrades of the Large Hadron Collider. They may also
provide the cornerstone for other particle accelerators.
The 15-year investment in Nb3Sn technology at Fermilab has established a strong foundation for the planned LHC luminosity upgrade. Four DOE national laboratories, Berkeley Lab, Brookhaven
Lab, Fermilab and SLAC, are involved in the US LHC Accelerator
Research Program (LARP), which plays a key role in continued US
leadership in superconducting magnet technology for future particle physics programs.
New Ferrite Pricing Announced
Leader Tech has announced a unit pricing structure for its line of
CE83 ferrites. Customers now have the option of requesting piece
pricing in addition to case quantity volume discounts. This change
will allow lower volume applications to enjoy the benefits of CE83
ferrites without increasing inventory levels.
The company's CE83
material ferrites are available in multiple solid and
split core styles to fit data
and power cables with
diameters ranging from
0.138 inches to 0.500
inches. The material formulation is optimized for
problem frequencies between 10 MHz to 1 GHz and delivers peek impedance at 300 MHz.
Magnetics Business & Technology * Summer 2015
In addition, all styles are in-stock and ready for immediate delivery. For more information or to view available styles and performance charts, engineers can instantly download the CE83 product
catalog from Leader Tech's website.
Molycorp Chosen to Supply Rare Earths for
Siemens Wind Turbine Generators
Siemens AG has selected Molycorp, Inc. to supply rare earth
materials during the next 10 years from its Mountain Pass, Calif.
facility for incorporation into Siemens' high-efficiency, direct drive
wind turbine generators. Molycorp will supply rare earth materials to Shin-Etsu Chemical Co., Ltd., which will produce the rare
earth magnets Siemens intends to utilize in its wind turbines.
Siemens officials noted that key factors in choosing Molycorp
were Molycorp's ability to provide greater global diversification
and reliability to its supply chain, as well as the environmental
and process innovations Molycorp has built into its Mountain
Pass rare earth facility. Among those innovations are the facility's ability to recycle water, regenerate the chemical reagents
needed in rare earth production, generate power from a highefficiency natural gas cogeneration power plant, and dispose of
mine tailings through an innovative paste tailings system.
Siemens officials said that the magnets to be used in its direct drive wind turbines will contain reduced levels of heavy rare
earth elements (HREEs), such as dysprosium. In collaboration
with Siemens Wind Power, Molycorp and Shin-Etsu will improve
the magnet material to reach zero HREEs, Siemens said. At the
same time, supply chain reliability will be increased and costs will
"The contract with Shin-Etsu and Molycorp is an important step
for us in sourcing magnet materials for our direct drive wind turbines," said Morten Rasmussen, head of Technology at Siemens
Wind Power and Renewables Division. "We strive for diversification
in the sourcing of these components to improve independency
from specific markets."
"We are very pleased to have been selected to supply Siemens
and Shin-Etsu with rare earth magnetic materials for this important
clean energy supply chain project," said Geoff Bedford, Molycorp's
president and CEO. "This agreement underscores Molycorp's commitment to partner with our customers to support their product
development efforts and serve as an integrated, long-term provider
of reliable rare earth supply."
Noncommittal Material Could Make for
Hypersensitive Magnetic Direction Detector
While the mysterious, unseen forces magnets project are now
(mostly) well-understood, they can still occasionally surprise us.
For instance, thin films of cobalt have been observed to spontaneously switch their poles, something that typically doesn't happen in the absence of an external magnetic field. Physicists at
the National Institute of Standards and Technology (NIST) and the
University of Maryland (UMD) have measured this phenomenon
on the largest scale yet.
Most magnets are "permanent," meaning a magnetic field of
some strength must be applied to reverse their north and south
poles. This permanence enables the billions of tiny magnets in
hard drives to reliably store data. And smartphone compasses
use nanomagnetic sensor technology to detect the Earth's magnetic field.
At the present time, creating and detecting these magnetic
fields takes a good deal of energy. Making these devices more
Table of Contents for the Digital Edition of Magnetics Business & Technology - Summer 2015
Bonded Magnets: A Versitile Class of Permanent Magnets
Spintronics on Paper: The Whys and Wherefores
Magnets, Materials & Assemblies
Software & Design
Research & Development
Marketplace / Advertising Index
Spontaneous Thoughts: The Rate Determining Step
Magnetics Business & Technology - Summer 2015