Superconducting correction magnets for the HERA proton storage ring

The Hadron Electron Ring Accelerator proton ring is equipped with superconducting dipole and quadrupole magnets. The adjustment of the working point and the chromaticity correction are provided by quadrupole and sextupole correction coils mounted on the cold beam pipe inside the main dipole magnets by epoxy and a strong-glass-fiber wrapping. The orbit correction in the proton ring is made by superferric correction dipoles mounted in common cryostats with the main quadrupole and beam-position monitors. The layout of both types of correction magnets is described and experimental results on quenching behavior and field quality are presented.