MEASUREMENT AND CORRECTION OF IMPERFECTIONS IN THE SLS STORAGE RING

M. Böge, A. Streun, V. Schlott, PSI, Villigen, Switzerland

Abstract:

Based on precise average beta function measurements with errors of $\approx$ 1 % for the locations of the 174 quadrupoles an SVD based beta beat correction has been applied using the individually powered quadrupoles as correctors. Residual horizontal and vertical beta beats of 4 and 3 % have been measured after correction. Beam based alignment techniques have been applied to determine BPM centers with respect to adjacent quadrupoles.