Performances of a linear type magnetic flux pump for compensating a little decremented persistent current of HTS magnets

Author

Chung, Yoondo ; Muta, Itsuya ; Hoshino, Tsutomu ; Nakamura, Taketsune

Author_Institution

Eng. Dept., Kyoto Univ., Japan

Volume

14

Issue

2

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

1723

Lastpage

1726

Abstract

This paper describes the characteristics of a linear type magnetic flux pump recently developed. The linear type flux pump has been fabricated to apply to compensate decremented persistent current of HTS applications such as NMR and MRI system. The linear type magnetic flux pump mainly consists of 3-phase AC armature coil, DC bias coil and superconducting Nb foil. In the preliminary experiment, the flux pump can charge the pumping-up current in the load coil of 1.3 mH during 1000 seconds under the DC bias current of 10 A and 3-phase AC of 8 A, 60 Hz. The magnitude of pumping current is 0.1 mA/s.

Keywords

compensation; high-temperature superconductors; magnetic flux; niobium; persistent currents; superconducting coils; superconducting magnets; 10 A; 3-phase AC armature coil; 60 Hz; 8 A; DC bias coil; DC bias current; HTS magnets; MRI system; NMR system; Nb; decremented persistent current compensation; linear type magnetic flux pump; load coil; pumping-up current; superconducting Nb foil; High temperature superconductors; Magnetic cores; Magnetic fields; Magnetic flux; Magnetic flux density; Niobium; Nuclear magnetic resonance; Persistent currents; Superconducting coils; Superconducting magnets; Linear type magnetic flux pump; Nb foil; persistent current compensation;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2004.831054

Filename

1325138