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Your search keyword '"Wegner, Ulrike"' showing total 21 results
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21 results on '"Wegner, Ulrike"'

1. Pump–probe capabilities at the SPB/SFX instrument of the European XFEL

Author

Koliyadu, Jayanath C. P., primary, Letrun, Romain, additional, Kirkwood, Henry J., additional, Liu, Jia, additional, Jiang, Man, additional, Emons, Moritz, additional, Bean, Richard, additional, Bellucci, Valerio, additional, Bielecki, Johan, additional, Birnsteinova, Sarlota, additional, de Wijn, Raphael, additional, Dietze, Thomas, additional, E, Juncheng, additional, Grünert, Jan, additional, Kane, Daniel, additional, Kim, Chan, additional, Kim, Yoonhee, additional, Lederer, Max, additional, Manning, Bradley, additional, Mills, Grant, additional, Morillo, Luis L., additional, Reimers, Nadja, additional, Rompotis, Dimitrios, additional, Round, Adam, additional, Sikorski, Marcin, additional, Takem, Cedric M. S., additional, Vagovič, Patrik, additional, Venkatesan, Sandhya, additional, Wang, Jinxiong, additional, Wegner, Ulrike, additional, Mancuso, Adrian P., additional, and Sato, Tokushi, additional

Published
2022
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2. Femtosecond x-ray diffraction study of multi-THz coherent phonons in SrTiO3

Author

Shayduk, Roman, Hallmann, Joerg, Rodriguez-Fernandez, Angel, Scholz, Markus, Lu, Wei, Boesenberg, Ulrike, Moeller, Johannes, Zozulya, Alexey, Jiang, Man, Wegner, Ulrike, Secareanu, Radu-Costin, Palmer, Guido, Emons, Moritz, Lederer, Max, Volkov, Sergey, Lindfors-Vrejoiu, Ionela, Schick, Daniel, Herzog, Marc, Bargheer, Matias, Madsen, Anders, Shayduk, Roman, Hallmann, Joerg, Rodriguez-Fernandez, Angel, Scholz, Markus, Lu, Wei, Boesenberg, Ulrike, Moeller, Johannes, Zozulya, Alexey, Jiang, Man, Wegner, Ulrike, Secareanu, Radu-Costin, Palmer, Guido, Emons, Moritz, Lederer, Max, Volkov, Sergey, Lindfors-Vrejoiu, Ionela, Schick, Daniel, Herzog, Marc, Bargheer, Matias, and Madsen, Anders

Abstract

We report generation of ultra-broadband longitudinal acoustic coherent phonon wavepackets in SrTiO3 (STO) with frequency components extending throughout the first Brillouin zone. The wavepackets are efficiently generated in STO using femtosecond infrared laser excitation of an atomically flat 1.6 nm-thick epitaxial SrRuO3 film. We use femtosecond x-ray diffraction at the European X-Ray Free Electron Laser Facility to study the dispersion and damping of phonon wavepackets. The experimentally determined damping constants for multi-THz frequency phonons compare favorably to the extrapolation of a simple ultrasound damping model over several orders of magnitude. (C) 2022 Author(s).

Published
2022

3. Femtosecond x-ray diffraction study of multi-THz coherent phonons in SrTiO3

Author

Shayduk, Roman, primary, Hallmann, Jörg, additional, Rodriguez-Fernandez, Angel, additional, Scholz, Markus, additional, Lu, Wei, additional, Bösenberg, Ulrike, additional, Möller, Johannes, additional, Zozulya, Alexey, additional, Jiang, Man, additional, Wegner, Ulrike, additional, Secareanu, Radu-Costin, additional, Palmer, Guido, additional, Emons, Moritz, additional, Lederer, Max, additional, Volkov, Sergey, additional, Lindfors-Vrejoiu, Ionela, additional, Schick, Daniel, additional, Herzog, Marc, additional, Bargheer, Matias, additional, and Madsen, Anders, additional

Published
2022
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6. Femtosecond x-ray diffraction study of multi-THz coherent phonons in SrTiO3.

Author

Shayduk, Roman, Hallmann, Jörg, Rodriguez-Fernandez, Angel, Scholz, Markus, Lu, Wei, Bösenberg, Ulrike, Möller, Johannes, Zozulya, Alexey, Jiang, Man, Wegner, Ulrike, Secareanu, Radu-Costin, Palmer, Guido, Emons, Moritz, Lederer, Max, Volkov, Sergey, Lindfors-Vrejoiu, Ionela, Schick, Daniel, Herzog, Marc, Bargheer, Matias, and Madsen, Anders

Subjects
FEMTOSECOND pulses, X-ray diffraction, PHONONS, FREE electron lasers, ACOUSTIC phonons, INFRARED lasers, WAVE packets
Abstract

We report generation of ultra-broadband longitudinal acoustic coherent phonon wavepackets in SrTiO3 (STO) with frequency components extending throughout the first Brillouin zone. The wavepackets are efficiently generated in STO using femtosecond infrared laser excitation of an atomically flat 1.6 nm-thick epitaxial SrRuO3 film. We use femtosecond x-ray diffraction at the European X-Ray Free Electron Laser Facility to study the dispersion and damping of phonon wavepackets. The experimentally determined damping constants for multi-THz frequency phonons compare favorably to the extrapolation of a simple ultrasound damping model over several orders of magnitude. [ABSTRACT FROM AUTHOR]

Published
2022
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11. Pump–probe laser system at the FXE and SPB/SFX instruments of the European X-ray Free-Electron Laser Facility

Author

Palmer, Guido, primary, Kellert, Martin, additional, Wang, Jinxiong, additional, Emons, Moritz, additional, Wegner, Ulrike, additional, Kane, Daniel, additional, Pallas, Florent, additional, Jezynski, Tomasz, additional, Venkatesan, Sandhya, additional, Rompotis, Dimitrios, additional, Brambrink, Erik, additional, Monoszlai, Balazs, additional, Jiang, Man, additional, Meier, Joachim, additional, Kruse, Kai, additional, Pergament, Mikhail, additional, and Lederer, Max J., additional

Published
2019
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13. Status of Pump-probe Laser Development for the European XFEL

Author

Wissmann, Laurens, Emons, Moritz, Kellert, Martin, Kruse, Kai, Lederer, Maximilian, Palmer, Guido, Pergament, Mikhail, Priebe, Gerd, Wang, Jinxiong, and Wegner, Ulrike

Abstract

The European XFEL is under construction and is designed to become a multi-user facility. Three SASE beam lines with two experimental areas each are foreseen to guarantee a high user throughput. In order to enable the full scientific potential of the facility, optical laser pulses for either pumping or probing samples will be deployed regularly. We are presenting the pump-probe laser concept and the current status of the development, showing some experimental results of the prototype laser, achieved to date. The main emphasis of the presentation lies on the integration of the laser system into Karabo, the emerging control system of the European XFEL.

Published
2014

21. Femtosecond x-ray diffraction study of multi-THz coherent phonons in SrTiO3.

Author

Shayduk, Roman, Hallmann, Jörg, Rodriguez-Fernandez, Angel, Scholz, Markus, Lu, Wei, Bösenberg, Ulrike, Möller, Johannes, Zozulya, Alexey, Jiang, Man, Wegner, Ulrike, Secareanu, Radu-Costin, Palmer, Guido, Emons, Moritz, Lederer, Max, Volkov, Sergey, Lindfors-Vrejoiu, Ionela, Schick, Daniel, Herzog, Marc, Bargheer, Matias, and Madsen, Anders

Subjects
*FEMTOSECOND pulses, *X-ray diffraction, *PHONONS, *FREE electron lasers, *ACOUSTIC phonons, *INFRARED lasers, *WAVE packets
Abstract

We report generation of ultra-broadband longitudinal acoustic coherent phonon wavepackets in SrTiO3 (STO) with frequency components extending throughout the first Brillouin zone. The wavepackets are efficiently generated in STO using femtosecond infrared laser excitation of an atomically flat 1.6 nm-thick epitaxial SrRuO3 film. We use femtosecond x-ray diffraction at the European X-Ray Free Electron Laser Facility to study the dispersion and damping of phonon wavepackets. The experimentally determined damping constants for multi-THz frequency phonons compare favorably to the extrapolation of a simple ultrasound damping model over several orders of magnitude. [ABSTRACT FROM AUTHOR]

Published
2022
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