Passive superconductor: A viable method of controlling magnetization multipoles in the SSC dipole

Conference · Wed Feb 01 00:00:00 EST 1989

OSTI ID:6153640

Green, M A

At injection, the magnetization of the superconductor produces the dominant field error in the SSC dipole magnets. The field generated by magnetization currents in the superconductor is rich in higher symmetric multipoles (normal sextupole, normal decapole, and so on). Pieces of passive superconductor properly located within the bore of the dipole magnet can cancel the higher multipoles generated by the SSC dipole coils. The multipoles generated by the passive superconductor (predominantly sextupole and decapole) are controlled by the angular and radial location of the superconductor, the volume of superconductor, and the size of the superconducting filaments within the passive conductor. This paper will present the tolerances on each of these factors. The paper will show that multipole correction using passive superconductor is in general immune to the effects of temperature and magnetization decay due to flux creep, provided that dipole superconductor and the passive correction superconductor are properly specified. When combined with a lumped correction system, the passive superconductor can be a viable alternative to continuous correction coils within the SSC dipoles. 20 refs., 8 figs., 2 tabs.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6153640
• Report Number(s): LBL-27062; CONF-890270-16; ON: DE89013432
• Resource Relation: Conference: International industrial symposium on the super collider, New Orleans, LA, USA, 8 Feb 1989; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
MAGNETIC FIELDS
CORRECTIONS
SUPERCONDUCTING MAGNETS
CONTROL
COMPARATIVE EVALUATIONS
CRITICAL CURRENT
ERRORS
MAGNETIC DIPOLES
MAGNETIZATION
SUPERCONDUCTING SUPER COLLIDER
TEMPERATURE EFFECTS
CURRENTS
DIPOLES
ELECTRIC CURRENTS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
MAGNETS
MULTIPOLES
STORAGE RINGS
SUPERCONDUCTING DEVICES
430300* - Particle Accelerators- Auxiliaries & Components