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- W62628564 abstract "Achieving arcsecond angular resolution in a grazing-incidence foil optic x-ray telescope such as the segmented mirror approach being considered for the NASA Constellation-X mission requires accurate and repeatable placement of thousands of individual foils. We are developing a method for assembling nested, segmented foil optics with sub-micron accuracy and repeatability using lithographically manufactured silicon alignment microstructures, called microcombs [1]. A system of assembly tooling incorporating the silicon microstructures, called an assembly truss, is used to position the foils that are then bonded to a spaceflight module. The advantage of this procedure is that the flight module has relaxed tolerance requirements while the precision assembly tooling can be reused. Previous work [5] has demonstrated that the microcombs can provide accurate and repeatable reference surfaces for the optic foils; current research has developed a device that makes progress towards actual flight module assembly. Key features include flexure bearings for frictionless motion of the microcombs, kinematic couplings to ensure repeatable alignment of successive flight modules, and flight module integration. Metrology of the foil optics is critical to meeting the telescope performance goals. In addition to the sub-micron assembly tolerances, individual foils must be manufactured with figure error less than 500 nm over their 140×100 mm surface area. A deep-UV Shack-Hartmann surface mapping tool has been created to determine whether the foils meet these manufacturing requirements and to provide active metrological feedback during the assembly procedure." @default.
- W62628564 created "2016-06-24" @default.
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- W62628564 date "2002-01-01" @default.
- W62628564 modified "2023-10-16" @default.
- W62628564 title "Precision Assembly and Metrology of X-ray Foil Optics" @default.
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