Open AccessGlobal DC closed orbit correction experiment on the NSLS x-ray ring
Author(s) -
Y. Chung,
G. Decker,
K. Evans
Publication year - 1992
Publication title -
osti oai (u.s. department of energy office of scientific and technical information)
Language(s) - English
Resource type - Reports
DOI - 10.2172/87843
Subject(s) - orbit (dynamics) , physics , beam (structure) , singular value decomposition , synchrotron , storage ring , optics , circular orbit , ring (chemistry) , mathematics , astrophysics , aerospace engineering , algorithm , engineering , chemistry , organic chemistry
In this note are described the global DC closed orbit correction experiments conducted on the X-ray ring at National Synchrotron Light Source (NSLS). The beam response matrix, defined as beam motion at BPM locations per unit kick by corrector magnets, was measured and then inverted using the technique of singular value decomposition (SVD). The product of the inverted matrix and the difference orbit gives the incremental kick strengths necessary to correct the orbit. As a result, the r.m.s. orbit error around the ring was reduced from 208 {mu}m to 61 {mu}m
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