QUADRUPOLE HARMONICS TUNING BY NOSE PIECES

Six types of quadrupole magnets for NSLS-II main ring have been manufactured at the Budker Institute of Nuclear Physics. Some types of magnets have nose pieces on poles. Nose pieces permit the correcting of magnetic field harmonics. Corrections of octupoles, sextupoles and allowed harmonics have been implemented. Also for some magnets, corrections of amplitude of dependence sextupole harmonic from current have been implemented.