Enhancement of NSLS sextupoles using permanent magnets

摘要

The recent upgrade of the NSLS X-Ray Ring energy from 2.584 to 2.8GeV requires defocusing sextupole fields beyond the operating limits ofthe present sextupole magnets. We have demonstrated that the requiredfields can be achieved by addition of permanent magnets to counteractthe saturation in the magnet poles. Magnetic measurements on a NSLSsextupole agree with fields predicted by Radia