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Description
The alignment of girders and individual magnetic elements according to the tight design specifications is of paramount importance for achieving the ultimate performance of the SLS 2.0 storage ring (SR) which is consisting of a large number of SR optics defining permanent magnets. As a result, alignment errors can easily overstrain the very limited capabilities of the electromagnetic dipole corrector magnets. In order to enable a fast realignment during commissioning the girders are vertically remote adjustable allowing for a realignment within +-0.5mm (backed by simulation) with stored beam and running fast orbit feedback based on previously taken survey data (Beam-Assisted Girder Alignment). A linear encoder based vertical positioning system monitors the relative girder-to-girder motion. In addition, the orbit correction system helps to identify errors of individual magnets on the girders.
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