Two high-order polynomial bendable mirrors in the TLS infrared beamline

Shean-Jen Chen; Chien-Kuang Kuan; Shen-Yaw Perng; Duan-Jen Wang; H. C. Ho; T. C. Tseng; Chien-Te Chen; Yi-Chung Lo

doi:10.1117/12.366649

25 October 1999 Two high-order polynomial bendable mirrors in the TLS infrared beamline

Shean-Jen Chen, Chien-Kuang Kuan, Shen-Yaw Perng, Duan-Jen Wang, H. C. Ho, T. C. Tseng, Chien-Te Chen, Yi-Chung Lo

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Proceedings Volume 3775, Accelerator-based Sources of Infrared and Spectroscopic Applications; (1999) https://doi.org/10.1117/12.366649
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

This study presents a Kirkpatrick-Baez mirror system which includes two high-order polynomial bendable mirrors in a Taiwan Light Source (TLS) infrared beamline to create and adjust more accurately collimating images on a focusing point. The source of infrared rays is synchrotron radiation from a TLS bending magnet, so the surface of a vertical focusing mirror (VFM) is designed on an elliptical shape. The Runge-Kutta numerical method is used to compute the optimal high-order polynomial shape of the horizontal focusing mirror (HFM), to focus the horizontal arc source on the point image. The HFM and VFM using 17-4 PH stainless steel substrate without an electroless nickel plate are mechanically bent from planar to the desired fifth-order polynomial shapes with central radii of 3.74 m and 5.43 m by the application of equal couples, respectively. The mirror fabrication process, mechanical design, and the method of adjusting the mirror shape using the Long Trace Profiler measurement system are described. Finally, the roughness of mirrors is 3 angstrom RMS. After the mirrors have been bent, the slope error over 2/3 of clear aperture length (170 mm) was reduced to less than 6.3 (mu) rad RMS.

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Shean-Jen Chen, Chien-Kuang Kuan, Shen-Yaw Perng, Duan-Jen Wang, H. C. Ho, T. C. Tseng, Chien-Te Chen, and Yi-Chung Lo "Two high-order polynomial bendable mirrors in the TLS infrared beamline", Proc. SPIE 3775, Accelerator-based Sources of Infrared and Spectroscopic Applications, (25 October 1999); https://doi.org/10.1117/12.366649

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KEYWORDS

Mirrors

Infrared radiation

Photons

Synchrotron radiation

Infrared imaging

Polishing

X-rays

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