Hysteresis losses in hollow superconductors

Author

Eikelboom, J.A. ; Hartmann, R.A. ; van de Klundert, L.J.M.

Author_Institution

Netherlands Energy Res. Found. ECN, Petten, Netherlands

Volume

25

Issue

2

fYear

1989

fDate

3/1/1989 12:00:00 AM

Firstpage

1968

Lastpage

1971

Abstract

Flux penetration into a hollow superconducting filament in a time-varying transverse magnetic field is determined numerically. The magnetization of the filaments is calculated for field variations below and above the penetration field of the filament. The influence of the inner radius of the superconducting filament on the magnetization and the hysteresis losses in the filament is shown. The critical current density is taken to be constant during the external field cycle and depends within the superconducting filament on the local magnetic field, which is the sum of the externally applied field and the field induced by the local screening currents. Calculations based on the theory presented here show good agreement with experimental results

Keywords

critical current density (superconductivity); magnetic flux; magnetic hysteresis; magnetisation; penetration depth (superconductivity); critical current density; field variations; flux penetration; hollow superconducting filament; hysteresis losses; local magnetic field; local screening currents; magnetization; penetration field; time-varying transverse magnetic field; Critical current density; Current distribution; Magnetic field measurement; Magnetic fields; Magnetic hysteresis; Magnetization; Niobium-tin; Solids; Superconducting materials; Superconductivity;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92694

Filename

92694