Precision mechanical design of an UHV-compatible artificial channel-cut x-ray monochromator.
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.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 981638
- Report Number(s):
- ANL/AES/CP-59979
- Country of Publication:
- United States
- Language:
- ENGLISH
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Initial Characterization and Design of an UHV-Compatible Artificial Channel-Cut Monochromator
Initial characterization and design of an ultra-high-vacuum-compatible artificail channel-cut monochromator.