High field magnet program at Brookhaven National Laboratory

The magnet program at Brookhaven National Laboratory (BNL) is focussed on s uperconducting magnets for particle accelerators. The effort includes magne t production at the laboratory and in industry, magnet R&D, and test facili ties for magnets and superconductors. Nearly 2000 magnets dipoles, quadrupo les, sextupoles and correctors for the are and insertion regions - were pro duced for the Relativistic Heavy Ion Collider (RHIC), which is being commis sioned. Currently, production of helical dipoles for the polarized proton p rogram at RHIC, insertion region dipoles for the Large Hadron Collider (LHC ) at CERN, and an insertion magnet system for the Hadron-Elektron-Ring-Anal age (HERA) collider at Deutsches Elektronen-Synchrotron (DESY) is underway. The R&D effort is exploring dipoles with fields above 10 T for use in post -LHC colliders. Brittle superconductors - Nb3Sn or HTS - are being used for these magnets. The superconductor test facility measures short-sample curr ents and other characteristics of samples up to 1 m in length, in liquid an d superfluid helium, in dipole fields above 7.5 T at 4.2 K (8.7 T at 1.9 K) , and up to 25 kA. This facility performed the short-sample testing of the productions runs of NbTi wires and cables for the HERA-p and RHIC magnets, and is preparing for similar work for the LHC project. The staff also tests samples of superconductors from government laboratories and industry aroun d the world.