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Correctors for SuperKEKB IR Magnets

The Magnet Division has built superconducting corrector magnets for use with the IR quads in the SuperKEKB project to upgrade the electron-positron collider at the Japanese laboratory, KEK. Each side of the IR needs five correctors. Each corrector contains multiple harmonics; each harmonic has one or more layers. No two correctors have the same design. Special “cancel coils” have been built to cancel fields from magnets that guide the adjacent beam. The fields of the cancel coils vary along the axis of the magnet. The correctors built built using the Direct Wind facility. KEK supplied the NbTi superconductor and precision support tubes. Magnetic field measurements at room temperature were made at BNL.

dipole corrector

Dipole Corrector

cancel coil

Cancel Coil