Experimental Research on the Bitter-Like HTS Magnet Energized by an Inner Flux Pump

High-temperature superconducting (HTS) 2G conductors have been extensively applied in high magnetic field. This paper presents a novel excitation method of the Bitter-like HTS magnet for a stack of the RE-Ba-Cu-O (RE = rare earth) annular plates. The Bitter-like HTS magnet was energized by a flux pu...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2019-03, Vol.29 (2), p.1-5
Main Authors: Yuan, Xi, Wang, Yinshun, Hu, Yidan, Chen, Hao, Liu, Mingchuang, Pi, Wei, Cai, Chuanbing
Format: Article
Language:English
Subjects:
Activation
Annular plates
Attenuation
Bitter-like HTS magnet
Coils
Conductors
Copper
Critical current (superconductivity)
Current sources
Excitation
Flux
flux pump
High temperature
High-temperature superconductors
induced magnetic field
inner excitation method
Magnetic field measurement
Magnetic fields
Magnetic flux
Magnetism
Plates (structural members)
Pulsed current
Rare earth elements
Rhenium
Saturation magnetization
Solenoids
Superconducting magnets
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Summary:High-temperature superconducting (HTS) 2G conductors have been extensively applied in high magnetic field. This paper presents a novel excitation method of the Bitter-like HTS magnet for a stack of the RE-Ba-Cu-O (RE = rare earth) annular plates. The Bitter-like HTS magnet was energized by a flux pump composed of a copper solenoid coil and a pulsed triangular waveform current source. A single REBCO annular plate's critical current Ic was measured in 77 K (LN2 bath) in self-field, and the structure design of the whole flux pump, the transient process of the induced magnetic field, and the magnetic field attenuation of the Bitter-like HTS magnet under different excitation methods were described and tested in 77 K. Results show that the Bitter-like HTS magnet energized by a flux pump can realize closed-loop operation, and the flux pump with variation pulsed current values has an impact on the induced magnetic field attenuation in the Bitter-like HTS magnet. Furthermore, the flux pump making use of the inner excitation method has a faster excitation speed than the outer excitation method in our previous study.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2018.2883132