Direct Wind Superconducting Corrector Magnets for the SUPERKEKB IR

Eight new superconducting interaction region (IR) quadrupoles and a variety of correction and cancel coil windings are needed for the SuperKEKB luminosity upgrade underway at KEK [1-2]. The correctors are required to fit in limited space inside the main IR quadrupole bores. Because there is insufficient space for magnetic yokes for the magnets closest to the interaction point (IP), external field cancel coil windings are needed to remove non-linear fields that would otherwise impact beams passing close to the main magnet coils. We are investigating if an additional cancel coil set would be useful to reduce detector background. The design and production of SuperKEKB corrector and cancel coils, using BNL Direct Wind magnet technology, is underway.