Development of X-ray Wavefront Sensing Techniques for Adaptive Optics Control at the Advanced Photon Source.
- Resource Type
- Article
- Authors
- Shi, Xianbo; Qiao, Zhi; Rebuffi, Luca; Wojcik, Michael; Highland, Matthew; Frith, Matthew G.; Harder, Ross; Shu, Deming; Mashrafi, Sheikh; Anton, Jayson; Kearney, Steven; Wyman, Max; Assoufid, Lahsen
- Source
- Synchrotron Radiation News. Mar/Apr2022, Vol. 35 Issue 2, p37-42. 6p.
- Subject
- *ADAPTIVE optics
*ADAPTIVE control systems
*FREE electron lasers
*X-rays
*FEEDBACK control systems
*BEAM optics
*HARD X-rays
- Language
- ISSN
- 0894-0886
Adaptive optics control We have been developing advanced algorithms for the auto-alignment of beamline optics and beam wavefront control. Coded-mask-based single-shot wavefront sensing Near-field speckle tracking has been widely used in X-ray wavefront sensing applications [[24]] because of the improved phase sensitivity and greater experimental flexibility relative to grating interferometry. Non-invasive wavefront sensing and correction Most wavefront sensing techniques are invasive, inserting pattern generators and detectors into the beam. In the application of controlling adaptive optics, two modes of wavefront sensing are needed: measuring the relative wavefront response to actuator motions of the deformable optics and determining the absolute wavefront. [Extracted from the article]