Abstract
Bending deformations of small storage ring vacuum chambers under atmospheric pressure are described. Results from a finite element model are presented which show that bending deformations due to pressure forces on metal bellows and arc chambers can cause severe misalignments at the exit ports. The deformations are shown to be larger in arc chambers of small radii. The effect of using bellows load compensators and flexible supports to reduce the deformations in an existing storage ring by an order of magnitude is evaluated by analysis and compared to actual measurements.
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