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Your search keyword '"Andreasen, Jens W."' showing total 3 results
Start Over Author "Andreasen, Jens W." Publisher american institute of physics
3 results on '"Andreasen, Jens W."'

1. Current capabilities of the imaging endstation at the NanoMAX beamline.

Author

Kahnt, Maik, Selberg, Johan, Vogt, Ulrich, Åstrand, Mattias, Björling, Alexander, Kalbfleisch, Sebastian, Andreasen, Jens W., Thånell, Karina, and Johansson, Ulf

Subjects
*X-ray fluorescence, *DEGREES of freedom, *PHOTON beams, *DATA quality
Abstract

The new imaging endstation of the NanoMAX beamline is being designed to complement the already existing diffraction endstation: measurements with smaller beams at lower photons energies, with higher stability, in vacuum and with sample cool-ing at the measurement position, optimized for X-ray fluorescence mapping and ptychographic imaging in two and three spatial dimensions. This comes at the cost of reduced flexibility and fewer degrees of freedom. We hereby present the results of the in-air commissioning of the main components for the new endstation and the data quality that has already been achieved. [ABSTRACT FROM AUTHOR]

Published
2023
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2. Current capabilities of the imaging endstation at the NanoMAX beamline.

Author

Kahnt, Maik, Selberg, Johan, Vogt, Ulrich, Åstrand, Mattias, Björling, Alexander, Kalbfleisch, Sebastian, Andreasen, Jens W., Thånell, Karina, and Johansson, Ulf

Subjects
*X-ray fluorescence, *DEGREES of freedom, *PHOTON beams, *DATA quality
Abstract

The new imaging endstation of the NanoMAX beamline is being designed to complement the already existing diffraction endstation: measurements with smaller beams at lower photons energies, with higher stability, in vacuum and with sample cool-ing at the measurement position, optimized for X-ray fluorescence mapping and ptychographic imaging in two and three spatial dimensions. This comes at the cost of reduced flexibility and fewer degrees of freedom. We hereby present the results of the in-air commissioning of the main components for the new endstation and the data quality that has already been achieved. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
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3. In situ X-ray ptychography imaging of high-temperature CO2 acceptor particle agglomerates.

Author

Høydalsvik, Kristin, Fløystad, Jostein Bø, Tiejun Zhao, Esmaeili, Morteza, Diaz, Ana, Andreasen, Jens W., Mathiesen, Ragnvald H., Rønning, Magnus, and Breiby, Dag W.

Subjects
*AGGLOMERATES (Chemistry), *NANOPARTICLES, *CARBON dioxide, *TRANSMISSION electron microscopy, *X-rays, *ATMOSPHERIC pressure
Abstract

Imaging nanoparticles under relevant reaction conditions of high temperature and gas pressure is difficult because conventional imaging techniques, like transmission electron microscopy, cannot be used. Here we demonstrate that the coherent diffractive imaging technique of X-ray ptychography can be used for in situ phase contrast imaging in structure studies at atmospheric pressure and elevated temperatures. Lithium zirconate, a candidate CO2 capture material, was studied at a pressure of one atmosphere in air and in CO2, at temperatures exceeding 600 °C. Images with a spatial resolution better than 200 nm were retrieved, and possibilities for improving the experiment are described. [ABSTRACT FROM AUTHOR]

Published
2014
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