Abstract
The X-ray optical mirror is one of the most important optical elements on the beam-line of a synchrotron radiation facility. The deformation of the working surface of the mirror greatly affects the quality of reflected beam, therefore it needs to be properly controlled. The deformation caused by gravity is one of the important sources of mirror shape error. In order to reduce the gravitational deformation and improve the surface accuracy, the mechanical responses of a Bessel-point supporting thin mirror (100 mm × 20 mm × 5 mm, length × width × height) with a downward working surface down is studied, via finite element analysis (FEA). In particular, to obtain the better surface accuracy, the top surface of the mirror is polished correspondingly to further reduce the deformation caused by gravity. Moreover, by comparing the results under a range of different polishing amounts, the recommended polishing amount is given according to the processing conditions and actual installation conditions. Finally, compared with the deformation results of the Bessel-point supporting theory, the obtained deformation (RMS) after polishing can be reduced by 30.86%, and the slope error (RMS) is reduced by 25.54%.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
