Magnetics Business & Technology - July/August 2024 - 19
RESEARCH & DEVELOPMENT
This design, he adds, also allows for magnets " to be fabricated
using simpler manufacturing processes than current magnet designs,
making them much less expensive to build. "
Shen notes that Berkeley Lab has significant experience in accelerator
magnet designs that utilize Nb-Ti, Nb3Sn, and HTS
materials like rare-earth barium copper oxide (REBCO)-coated
conductors. The Lab, he adds, is part of the HL-LHC upgrade,
which is developing a higher-field superconducting magnet made
from a niobium-tin alloy.
Furthermore, the new magnet design was also shown to require
no quench training during testing. Quenching is a sudden and
unpredictable loss in the superconductivity of a magnet and is
a long-standing and well-known issue affecting magnet performance.
Quench training involves gradually improving magnet performance
with repeated quenches at higher and higher currents to
reach the desired current.
(left to right) Tengming Shen, Paolo Ferracin, and Laura Garcia Fajardo
work on the new HTS magnet design at the Superconducting magnet
fabrication lab in ATAP. (Credit: Paul Mueller/Berkeley Lab)
While the development of the magnet is still at an early stage,
Shen says their work provides " a blueprint and road map for building
new, more powerful magnets that could extend the capabilities
of accelerators as well as other technologies that employ superconducting
magnets like magnetic resonance imaging. "
The team is conducting further testing on the magnet by inserting
it into a large bore Nb3Sn LTS magnet, which they say could pave
the way for large, higher field magnets using thicker and highercurrent
superconducting cables.
The CCT magnet with Bi-2212 superconducting cables. (Credit: Berkeley
Lab)
" Most newly constructed LTS magnets undergo quench training
before use, often requiring up to 20 quenches. This expends
significant amounts of liquid helium through evaporation, which
can be very costly and time-consuming, " explains Laura Garcia
Fajardo, a Research Scientist at Berkeley Lab's Engineering Division
who was part of the team that developed the new magnet.
However, after just one quench, the magnet's performance remained
the same following subsequent testing. This, says Garcia
Fajardo, suggests " minimal training will be required for Bi-2212
magnets, which dramatically reduces costs and shortens development
time. We still need to verify this at a larger scale using larger
magnets. "
The CCT magnet, she adds, may also have lower magnetic field
errors than other magnet designs. " Our magnet showed low
http://journals.aps.org/prab/abstract/10.1103/physrevaccelbeams.25.122401
http://journals.aps.org/prab/abstract/10.1103/physrevaccelbeams.25.122401
http://www.doi.org/10.1109/tasc.2023.3264788
http://www.MagneticsMag.com
Magnetics Business & Technology - July/August 2024
Table of Contents for the Digital Edition of Magnetics Business & Technology - July/August 2024
Contents
Magnetics Business & Technology - July/August 2024 - Cover1
Magnetics Business & Technology - July/August 2024 - Cover2
Magnetics Business & Technology - July/August 2024 - Contents
Magnetics Business & Technology - July/August 2024 - 4
Magnetics Business & Technology - July/August 2024 - 5
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Magnetics Business & Technology - July/August 2024 - 30
Magnetics Business & Technology - July/August 2024 - Cover3
Magnetics Business & Technology - July/August 2024 - Cover4
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