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Figure 11
(Upper image) Timeline of the mirror sagitta, showing two identical sequences of eight Gaussian, Lorentzian or polynomial shapes applied to the mirror. The first sequence begins with the mirror at a stable shape of zero volts, whereas the second sequence starts after a 1000 V intentional `kick' to the mirror. (Middle image) Height change of mirror shapes after the 1000 V impulse relative to the 0 V state. The curves are indistinguishable. (Lower image) Calculated difference between corresponding shapes in the two sets of measurements in closed-loop. Repeatability errors are ∼30 picometres r.m.s., reaching single-atom levels.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 32| Part 1| January 2025|
https://doi.org/10.1107/S1600577524011007
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