13 April 2016

Superconducting insert magnet generates new record field of 40.2 teslas

Concept of the no-insulation winding technique. Concept of the no-insulation winding technique.

Using a novel method of winding the magnet coil that dispensed with the traditional insulation, the MagLab reached another world record and laid the foundation for more to come.

What is the finding?

A new magnet test coil, wound using the latest ultra-thin, high-temperature-superconducting tape and a new "no insulation" technique, allowed for an unprecedented operation of a superconducting magnet at an electrical current density of 900 amps per square millimeter. This generated 9.2 teslas, even when the test coil was placed in the 31 tesla background field of one of the MagLab's resistive magnets. The total of 40.2 teslas attained by this compact coil is more than 5 teslas higher than has ever been achieved by the insertion of a superconducting test coil in the bore of a resistive magnet.

Why is this important?

The drive toward all-superconducting 40 tesla magnets is challenging and expensive. A reduction in size of the innermost coils enables a dramatic reduction in the overall size (and, consequently, cost) of the complete system. The MagLab not only needs to investigate relevant technologies to reach higher fields, but also to control costs by developing affordable systems.

Who did the research?

Seungyong Hahn, Iain Dixon, Seokho Kim, Kwanglok Kim, George Miller, W. Scott Marshall, Ulf Trociewitz, Jan Jaroszynski, Dmytro Abraimov, and David Larbalestier

National High Magnetic Field Laboratory, Florida State University

Why did this research need the MagLab?


This research was conducted in 31T/50mm bore resistive background magnet at the MagLab's DC Field Facility.

The MagLab's unique magnets can be used to test new magnet prototypes, thereby advancing the frontiers of magnet technologies. The MagLab staff leads the world in applying the high-temperature superconductors to ultra-high field superconducting magnets. This new world record combines these very special capabilities of the MagLab.

Read the press release on this new world record.

Details for scientists


This research was funded by the following grants: G.S. Boebinger (NSF DMR-1157490)

For more information, contact Seungyong Hahn.


  • Research Area: Magnet Technology, Superconductivity - Applied
  • Facility / Program: ASC
  • Year: 2016
Last modified on 14 April 2016