Superconducting sextupole correction coil operating in persistent mode
Error fields in a dipole due to superconductor magnetization and conductor misplacements add unwanted multipole, mainly sextupole and decapole, terms to the desired dipole field. Two persistent mode sextupole correction coils inside the bore of model SSC dipoles have been built and tested. A shorted superconducting sextupole coil has a current induced in it by the error sextupole field such that no sextupole field can penetrate into the proton beam region. The correction sextupole coils are one layer thick and are wound from a single length of insulated composite Nb-Ti and copper wire 0.60 mm in diameter. Each of the six poles has ten turns and is mounted on a 1.75 cm radius stainless steel bore tube. Details of testing and trimming of the correction coils are described. Test results of the measured magnetic field within the model SSC dipoles with the correction coils in and out of persistent mode operation are presented. An electrical heater is used to drive the coil out of the persistent mode. Measurements of joint resistance and coil decay time constants are also given.
- Research Organization:
- Lawrence Berkeley Laboratory, University of California
- OSTI ID:
- 6481293
- Report Number(s):
- CONF-840937-
- Journal Information:
- IEEE Trans. Magn.; (United States), Journal Name: IEEE Trans. Magn.; (United States) Vol. MAG 21:2; ISSN IEMGA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Sextupole correction coils for SSC model dipoles
Sextupole correction coils for SSC model dipoles
Related Subjects
43 PARTICLE ACCELERATORS
430400* -- Particle Accelerators-- Storage Rings
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
CHROMIUM ALLOYS
COPPER
CORRECTIONS
CORROSION RESISTANT ALLOYS
DIPOLES
ELECTRIC CONTACTS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
ELEMENTS
EQUIPMENT
EXPERIMENT PLANNING
FABRICATION
HEATERS
IRON ALLOYS
IRON BASE ALLOYS
MAGNETIC DIPOLES
MAGNETIC MOMENTS
MAGNETS
METALS
MULTIPOLES
NIOBIUM ALLOYS
OPERATION
PERFORMANCE TESTING
PLANNING
STAINLESS STEELS
STEELS
STORAGE RINGS
SUPERCONDUCTING DEVICES
SUPERCONDUCTING MAGNETS
SUPERCONDUCTING SUPER COLLIDER
SUPERCONDUCTING WIRES
TESTING
TITANIUM ALLOYS
TRANSITION ELEMENTS
WIRES