Title :
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
fDate :
3/1/1993 12:00:00 AM
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
