BEST Reports Improved In-Field Critical Current Performance of its Second Generation High-Temperature Superconductor YBCO Tapes
June 28 2010 - 7:00AM
Business Wire
Bruker Energy & Supercon Technologies, Inc. (BEST) today
reported in-field high magnetic field test results for its
second-generation (2G) high temperature superconductor (HTS) tape,
demonstrating enhanced performance as a result of improvements to
its proprietary manufacturing technology.
Recently, the 2G HTS coated conductors (YBCO material) produced
by BEST have achieved a new record critical current of 1,925
Amperes (A) in a 4 millimeter (mm) wide tape tested at a
temperature of 4.2 Kelvin (K) in an 18 Tesla (T) magnetic field
parallel to the tape surface. This current corresponds to 4,810 A
per cm-width and a superconductor current density of 27 MA/cm2.
With a perpendicular field orientation, the critical current
reached 1,000 A in a 7 T magnetic field, and 732 A in a 10 T field.
These critical current test results were verified in collaboration
with the high magnetic field test laboratory at the Karlsruhe
Institute of Technology (KIT), Germany.
Dr. Alexander Usoskin, R&D Manager for 2G HTS materials and
superconducting fault current limiters (SFCL) at BEST, commented:
“We believe these new critical current test values are more than
twice the highest critical currents previously observed in 4 mm
wide HTS coated conductors in such magnetic fields. The results
were obtained from 5 to 10 meter long tapes that we consider to be
representative samples of our large scale YBCO manufacturing
process. With our new proprietary deposition technique based on
multi-beam pulsed laser deposition, the manufacturing of such
‘high-field’ HTS tapes is now feasible, and we also expect these
processes to be more robust for increasing processing yields.”
Dr. Klaus Schlenga, Chief Technology Officer at BEST, commented:
“These in-field critical current test results are especially
impressive since the high current capacity is accompanied by high
intrinsic mechanical tape strength, without the need for any
additional reinforcement, for example with steel tapes.
Significantly improved in-field performance should positively
influence high magnetic field applications that are tightly linked
to the technical critical current density of the YBCO
superconductor, such as superconducting dipole magnets, Nuclear
Magnetic Resonance (NMR) ultra-high field superconducting magnets,
and other new superconducting magnet designs in energy
research.”
Professor Dr. Mathias Noe, Director of the Institute for
Technical Physics of the Karlsruhe Institute for Technology (KIT),
added: “We are glad to confirm the measured data with BEST HTS
tapes. Our HOMER high field test facility allows high resolution
measurements of critical currents in a fully superconducting magnet
up to 20 T, and our plans are to go for even higher fields in the
future with HTS tapes. The measured tapes are particularly strong
candidates for such a high field insert. These improved critical
current test results are another highlight in our long-lasting
partnership with BEST in various fields of applied
superconductivity.”
About Bruker Energy & Supercon Technologies
Bruker Energy & Supercon Technologies, Inc. (BEST) is a
subsidiary of Bruker Corporation (NASDAQ: BRKR). BEST is a
world-leading supplier of superconductors as well as
superconducting components and devices for alternative energy,
smart grid, ‘big science’, industrial and healthcare applications.
The product range encompasses a broad portfolio of high performance
superconductors, superconducting magnets and devices for industrial
and research applications, as well as accelerator technologies,
including turn-key systems. For more information on BEST, please
visit: www.bruker-est.com.
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