Current dependence of harmonic field coefficients of 5-cm-aperture, 15-m-long SSC dipole magnet prototypes

Author

Zhao, Y. ; Akhmetov, A. ; Anerella, M. ; Bossert, R. ; Bush, T. ; Capone, D.W., II ; Carson, J. ; Coombes, R. ; Cottingham, J. ; Delchamps, S.W. ; Devred, A. ; Di Marco, J. ; Ganetis, G. ; Garber, M. ; Goodzeit, C. ; Ghosh, A. ; Gourlay, S. ; Greene, A. ;

Author_Institution

Superconducting Super Collider Lab., Dallas, TX, USA

Volume

3

Issue

1

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

674

Lastpage

677

Abstract

Eighteen 5-cm-aperture, 15-m-long Superconducting Super Collider (SSC) dipole magnet prototypes have been produced and cold tested. On each prototype, the dependence of harmonic field coefficients on magnetic current was measured as part of a study of the magnetic field quality. For most of the magnets, the observed behavior conforms to what can be expected from the effects of persistent magnetization currents and iron yoke saturation. A few prototypes, however, exhibited anomalies during current ramp at 4 A/s which can be attributed to large cable eddy currents.<>

Keywords

beam handling equipment; eddy current losses; magnetic fields; proton accelerators; storage rings; superconducting magnets; synchrotrons; 15 m; 5 cm; SSC dipole magnet prototypes; Superconducting Super Collider; cable eddy currents; cold tested; current dependence; harmonic field coefficients; magnetic current; magnetic field quality; persistent magnetization currents; superconducting magnets; yoke saturation; Current measurement; Eddy currents; Iron; Laboratories; Magnetic field measurement; Prototypes; Saturation magnetization; Superconducting cables; Superconducting coils; Superconducting magnets;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.233794

Filename

233794