Precision mechanical design of an UHV-compatible artificial channel-cut x-ray monochromator

D. Shu; S. Narayanan; A. Sandy; M. Sprung; C. Preissner; J. Sullivan

doi:10.1117/12.733101

17 September 2007 Precision mechanical design of an UHV-compatible artificial channel-cut x-ray monochromator

D. Shu, S. Narayanan, A. Sandy, M. Sprung, C. Preissner, J. Sullivan

Proceedings Volume 6665, New Developments in Optomechanics; 66650O (2007) https://doi.org/10.1117/12.733101
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

A novel ultra-high-vacuum (UHV)-compatible x-ray monochromator has been designed and commissioned at the undulator beamline 8-ID-I at the Advanced Photon Source (APS) for x-ray photon correlation spectroscopy applications. To meet the challenging stability and x-ray optical requirements, the monochromator integrates two new precision angular positioning mechanisms into its crystal optics motion control system: An overconstrained weak-link mechanism that enables the positioning of an assembly of two crystals to achieve the same performance as a single channel-cut crystal, the so called "artificial channel-cut crystal"; A ceramic motor driven in-vacuum sine-bar mechanism for the double crystal combined pitch motion. The mechanical design of the monochromator, as well as the test results of its positioning performance are presented in this paper.

Citation Download Citation

D. Shu, S. Narayanan, A. Sandy, M. Sprung, C. Preissner, and J. Sullivan "Precision mechanical design of an UHV-compatible artificial channel-cut x-ray monochromator", Proc. SPIE 6665, New Developments in Optomechanics, 66650O (17 September 2007); https://doi.org/10.1117/12.733101

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