Characteristics of a persistent current compensator for Superconducting NMR magnets using linear type magnetic flux pump

Author

Chung, Yoon Do ; Muta, Itsuya ; Hoshino, Tsutomu ; Nakamura, Taketsune

Author_Institution

Electr. Eng. Dept., Kyoto Univ., Japan

Volume

15

Issue

2

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

1338

Lastpage

1341

Abstract

This paper describes the characteristics of a linear type magnetic flux pump for compensating current in a superconducting coil with 10 A operating current. The linear type flux pump has been fabricated to use for compensating persistent current decay of HTS applications such as NMR and MRI systems. Pumping current of the linear type magnetic flux pump mainly can be controlled by frequency of AC current. In the experiment, it has been demonstrated that the linear type magnetic flux pump can effectively charge and discharge the current in the load coil of 543 mH for various frequencies with the DC bias of 10 A and the AC of 5 A_rms. Moreover, experimental results of temperature distribution of a slow response PCS have been compared with simulation.

Keywords

compensation; high-temperature superconductors; magnetic flux; nuclear magnetic resonance; persistent currents; superconducting magnets; 10 A; 5 A; HTS applications; linear type magnetic flux pump; persistent current compensator; slow response PCS; superconducting NMR magnets; superconducting coil; temperature distribution; Frequency; High temperature superconductors; Magnetic flux; Magnetic resonance imaging; Nuclear magnetic resonance; Persistent currents; Personal communication networks; Superconducting coils; Superconducting magnets; Temperature distribution; Linear type magnetic flux pump; Nb foil; persistent current compensator;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2005.849589

Filename

1439889