The effect of flux creep on the magnetization field in the SSC diopole magnets
- Lawrence Berkeley Lab., CA (USA)
The sextuple fields of model SSC dipole magnets have been observed to change with time when the magnets are held at constant current under conditions similar to injection into the SSC accelerator. The changes in the sextupole component have close to a linear log time dependence, and is felt to be caused by flux creep decay of the magnetization currents in the superconductor filaments. Measurements of this decay have been made under various conditions. The conditions include various central field inductions and changes of field prior to when the decay was measured. The measured field decay in the dipole's sextupole is proportional to the magnitude and sign of the sextupole due to magnetization which was measured at the start of the decay. This suggests that the decay is a bulk superconductivity flux creep. Proximity coupling appears to play only a minor role in the flux creep according to recent LBL measurements with a stable power supply. 4 refs., 6 figs., 3 tabs.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5519827
- Report Number(s):
- LBL-26598; CONF-890701-6; ON: DE90000124; TRN: 89-025695
- Resource Relation:
- Conference: International cryogenic materials conference, Los Angeles, CA (USA), 24-28 Jul 1989
- Country of Publication:
- United States
- Language:
- English
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Magnetic field decay in model SSC dipoles
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Related Subjects
MAGNETIC FIELDS
ENERGY LOSSES
CREEP
MAGNETIC DIPOLES
MAGNETIZATION
SUPERCONDUCTING MAGNETS
SUPERCONDUCTING SUPER COLLIDER
DIPOLES
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
LOSSES
MAGNETS
MECHANICAL PROPERTIES
MULTIPOLES
STORAGE RINGS
SUPERCONDUCTING DEVICES
430200* - Particle Accelerators- Beam Dynamics
Field Calculations
& Ion Optics