22-27 September 2019
Hyatt Regency Hotel Vancouver
Canada/Pacific timezone

Mon-Mo-Or2-04: Bi-2212 Coil Technology Development Efforts at the National High Magnetic Field Laboratory

23 Sep 2019, 12:00
15m
Regency CD

Regency CD

Contributed Oral Presentation Mon-Mo-Or2 - HTS Magnets I

Speaker

Dr Youngjae Kim (Applied Superconductivity Center, National High Magnetic Field Laboratory, Florida State University)

Description

The National High Magnetic Field Laboratory (NHMFL) is in the fortunate situation to put substantial effort into advancing all three high field magnet relevant types of high temperature superconductor (HTS) technologies, REBCO, Bi-2223, and Bi-2212, as a part of its commitment to develop all-superconducting high field magnets. Here we are presenting our work on Bi-2212 coil technology, which experienced a strong boost after significant progress was made in the heat-treatment process of the wire [1]. Bi-2212 wire has distinctive advantages compared with the other HTS conductors, as it can be made as round or aspected wire, it can be twisted, is multifilament, it can be easily cabled, it has low magnetization, and has isotropic electromagnetic properties. Operating conditions at highest fields, however, are extremely demanding on the coil mechanics and have yet to be fully explored in in HTS coils in general. Several test coils have been built and tested to evaluate various coil reinforcement schemes. In a collaboration with Lawrence Berkeley National Laboratory (LBNL), we heat treated several of Bi-2212 racetrack and CCT coils. This presentation will provide an overview and update of our on-going Bi-2212 coil R&D effort.

Acknowledgement: This work was performed at the National High Magnetic Field Laboratory, which is supported by National Science Foundation Cooperative Agreement No. DMR-1644779 and DMR-1839796, and the State of Florida, and is amplified by the U.S. Magnet Development Program (MDP).

[1] D. C. Larbalestier et al., “Isotropic round-wire multifilament cuprate superconductor for generation of magnetic fields above 30 T,” Nature Materials volume 13, pages 375–381 (2014)

Primary author

Dr Youngjae Kim (Applied Superconductivity Center, National High Magnetic Field Laboratory, Florida State University)

Co-authors

Dr Ulf Trociewitz (ASC-NHMFL) Dr Ernesto Bosque (Applied Superconductivity Center, National High Magnetic Field Laboratory, Florida State University) Daniel Davis (FSU/NHMFL) Mr Charles English (Applied Superconductivity Center, National High Magnetic Field Laboratory, Florida State University) Dr Jianyi Jiang (Applied Superconductivity Center, National High Magnetic Field Laboratory, Florida State University) Eric Hellstrom (Applied Superconductivity Center, National High Magnetic Field Laboratory, Florida State University) S Imam Hossain (National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida, FL 32310, USA) Yavuz Oz (National High Magnetic Field Laboratory) Mr Shaon Barua (National High Magnetic Field Laboratory, Florida State University) Mr James Gillman (FSU, NHMFL, ASC) Mr George Miller (Applied Superconductivity Center, National High Magnetic Field Laboratory, Florida State University) Dr Jun Lu (National High Magnetic Field Laboratory) Jeremy Levitan (NHMFL) David Larbalestier (National High Magnetic Field Laboratory) Prof. Lance Cooley (ASC/NHMFL/FSU)

Presentation Materials