Influence of optics vibration on synchrotron beam coherence
Vibration of optics is one of the major limiting factors of the performance of state-of-the-art beamlines at low-emittance synchrotron facilities. In this work, we present a theoretical model with experimental data describing vibration-induced effects on X-ray beam coherence. Owing to the Van Cittert-Zernike theorem, the coherence function of an X-ray beam perturbed by optics vibrations can be adequately characterized by modeling the spatial profile of the beam effective source. The measurements were carried out by using grating interferometry and a refractive lens with controlled vibration as a test optics. The experimental results confirm the model prediction and reveal the dependency of the measured beam spatial coherence on the acquisition time. The proposed method can be used to identify the eigenfrequency of the optical system as well as to optimize beamline operation and experimental conditions for coherence-related techniques.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1500005
- Alternate ID(s):
- OSTI ID: 1493659
- Journal Information:
- Optics Letters, Vol. 44, Issue 4; ISSN 0146-9592
- Publisher:
- Optical Society of America (OSA)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Direct 2D spatial-coherence determination using the Fourier-analysis method: Multi-parameter characterization of the P04 beamline at PETRA III
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text | January 2020 |
Direct 2D spatial-coherence determination using the Fourier-analysis method: multi-parameter characterization of the P04 beamline at PETRA III
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journal | January 2020 |
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