Prototype quadrupole magnets for the PLS storage ring

Two prototype quadrupole magnets for the 2.0 GeV PLS storage ring have been built and their magnetic properties have been measured. The prototype quadrupoles have a C-shaped core geometry to facilitate installation of the vacuum chambers and photon beam lines. Pole end chamfering experiments to reduce 12-pole and 20-pole errors, and core shimming experiments to compensate the effects of the core asymmetry, have been performed. After compensation, all multipole error levels are less than the tolerances set, by the beam dynamics requirements.<
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