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Description
The HEPS storage ring consists of 48 7BA cells, with multipole magnets in each cell supported by several multipole girders. A set of alignment adjustment mechanism is present between each multipole magnet and the girder to fine-tune the magnet's six degrees of freedom position. The majority of magnet adjustment mechanism structures utilize vertical wedge blocks and horizontal and longitudinal push-pull bolts. But all sextupoles are installed on Movers that can be remotely adjusted both horizontally and vertically. Due to the Mover's inability to adjust angular orientation, the pre-alignment of the sextupole magnet is different from other multipole magnets. This article will introduce the alignment requirements of sextupole and Mover, error analysis and control measures, as well as the alignment scheme and process.
