4 September 2015 Investigation of magnetically smart films applied to correct the surface profile of light weight X-ray optics in two directions
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Abstract
Our goal is to improve initially fabricated X-ray optics figures by applying a magnetic field to drive a magnetic smart material (MSM) coating on the non-reflecting side of the mirror. The consequent deformation of the surface should be three-dimensional. Here we will report on the results of working with a glass sample of 50x50x0.2 mm that has been coated with MSMs. The coated glass can be deformed in 3 dimensions and its surface profile was measured under our Zygo NewView white light interferometer (WLI). The driving magnetic field was produced via a pseudo-magnetic write head made up of two permanent magnet posts. The magnet posts were moved about the bottom of the glass sample with a 3-d computer controlled translation stage. The system allowed four degrees of freedom of motion, i.e., up and down, side to side, back and forth, and rotation of the posts (3.175 mm diameter) about the vertical axis to allow us to change the orientation of the magnetic field in the (horizontal) plane of the sample. We established a finite element analysis (FEA) model to predict deformations and compare with the observed results in order to guide the application of the magnetically controlled MSMs to improve the future X-ray optics figures.
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Xiaoli Wang, Xiaoli Wang, Youwei Yao, Youwei Yao, Jian Cao, Jian Cao, Semyon Vaynman, Semyon Vaynman, Michael E. Graham, Michael E. Graham, Tianchen Liu, Tianchen Liu, M. P. Ulmer, M. P. Ulmer, } "Investigation of magnetically smart films applied to correct the surface profile of light weight X-ray optics in two directions", Proc. SPIE 9603, Optics for EUV, X-Ray, and Gamma-Ray Astronomy VII, 96031O (4 September 2015); doi: 10.1117/12.2187070; https://doi.org/10.1117/12.2187070
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