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Tabletop Soft X-Ray Ptychography in Transmission Geometry

Hendriks, J. (2017) Tabletop Soft X-Ray Ptychography in Transmission Geometry. Master's Thesis / Essay, Applied Physics.

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Microscopes have proven to be an important tool in science. X-ray microscopes can reach higher resolution than regular optical microscopes because of the shorter wavelength, but due to the stronger interaction with matter no regular optics can be used. CDI and Ptychography are two methods that are used in this report to reconstruct a magnified image from the object from its diffraction patterns. These methods are a way to cope with the phase problem, as only amplitudes can be detected where information about the phase and amplitude is needed to make a reconstruction. Both methods were used in combination with tabletop measurements in a transmission geometry. For the measurement with CDI a laser in the visible range was used (633 nm) and the object reconstruction clearly showed the sample with all its features with a resolution of 3 micron. Soft x-rays with a wavelength of 29 nm were used for the ptychography measurements, generated by high harmonic generation. Several measurements have been performed with different parameters in an effort to get the first ptychographic reconstructions from this setup. The results are a reconstruction of the whole test object with a resolution of 3 micron or 2 micron if it is partly scanned.

Item Type: Thesis (Master's Thesis / Essay)
Degree programme: Applied Physics
Thesis type: Master's Thesis / Essay
Language: English
Date Deposited: 15 Feb 2018 08:30
Last Modified: 15 Feb 2018 08:30

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