Pulsed magnetization processes for HTS bulk components

Author

Sander, Michael ; Klaeser, Marion

Author_Institution

Forschungszentrum Karlsruhe, Germany

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

3732

Lastpage

3735

Abstract

Magnetization experiments using pulsed Cu coils were carried out on YBCO rings employing multi-pulse processes with different peak fields and pulse durations. Trapped magnetic flux profiles were recorded, and the shapes and absolute values of the remanent magnetization are discussed in terms of the dynamics of such pulsed magnetization processes. While Bean´s model with a constant current density J=J_c describes quasi-stationary processes well, in the pulsed magnetization the transient current density clearly exceeds J_c and leads to more complex flux flow effects

Keywords

barium compounds; critical current density (superconductivity); flux flow; flux pinning; high-temperature superconductors; remanence; yttrium compounds; Bean model; Cu; HTS bulk components; YBCO rings; YBa₂Cu₃O₇; constant current density; flux flow effects; multi-pulse processes; peak fields; pulse durations; pulsed Cu coils; pulsed magnetization; pulsed magnetization processes; quasi-stationary processes; remanent magnetization; transient current density; trapped magnetic flux profiles; Bean model; Coils; Current density; High temperature superconductors; Magnetic fields; Magnetic materials; Magnetization processes; Permanent magnets; Space vector pulse width modulation; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919875

Filename

919875