title: Compact prototype apparatus for reducing the circle of confusion down to 40 nm for x-ray nanotomography.
abstract: We have constructed a compact prototype apparatus for active correction of circle of confusion during rotational motion. Our system combines fiber optic interferometry as a sensing element, the reference cylinder along with the nanopositioning system, and a robust correction algorithm. We demonstrate dynamic correction of run-out errors down to 40 nm; the resolution is limited by ambient environment and accuracy of correcting nanopositioners. Our approach provides a compact solution for in-vacuum scanning nanotomography x-ray experiments with a potential to reach sub-nm level of correction.
authors.affiliation: National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors.forename: Jungdae
authors.initials: J
authors.lastname: Kim
authors.forename: K
authors.initials: K
authors.lastname: Lauer
authors.forename: H
authors.initials: H
authors.lastname: Yan
authors.forename: Y S
authors.initials: YS
authors.lastname: Chu
authors.forename: E
authors.initials: E
authors.lastname: Nazaretski