Development of a Superconducting Sextupole-Dipole Corrector Magnet

Abstract

Each half cell of the proposed Large Hadron Collider (LHC) lattice [1] will be equipped with a 1.25 meter long superconducting corrector magnet which will combine a 4000 T/m² sextupole and a 1.5 T dipole. The correction magnets of the two rings will be mounted in pairs in the cryostat of the main quadrupoles. The sextupole coil is wound from a solid, NbTi based, superconducting wire. The dipole coil is wound from a preassembled ribbon containing 12 parallel wires. The two concentric coils are precoropressed by shrink fitted aluminium rings. The yoke is simply a thick walled iron tube. The paper describes the magnet design, discusses the results of the field and stress calculations with emphasis on the superposition of the two types of field. It comments on the choice of the conductors and describes the developed fabrication techniques.