Speaker
Description
Ptychography is a lensless X-ray diffraction microscopy technique in which the sample is scanned at pre-defined positions collecting far-field diffraction patterns at each of these scanning positions. The diffraction patterns along with the information regarding the scan positions are then processed using iterative phase retrieval algorithms resulting in high resolution complex transmission function of the sample. Unlike techniques like transmission X-ray microscopy (TXM), Fourier transform holography (FTH) or scanning transmission X-ray microscopy (STXM), the resolution doesn't depend on the focusing optics or the reference aperture, but on the detectable signal contained in the measurable inverse space. While other parameters such as beam stability and stage accuracy play an important role, the fundamental limitation on obtainable resolution is the measurable inverse space. We have developed extensive ptychography derived 2D, 3D imaging capabilities at CLS. We can conduct Ptychography and Ptycho-Tomography at SM in the soft X-ray regime. We have demonstrated first ever hard X-ray ptychographic imaging in Canada by establishing this experiment at BXDS-IVU beamline, we are currently pushing this into the 3rd dimension. I will report on various details leading up to this exciting experimental capability at Canadian Light Source.
| Keyword-1 | Ptychography |
|---|---|
| Keyword-2 | Imaging |
| Keyword-3 | Synchrotron |