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Generation of high-fluence and high-intensity hard x-ray attosecond pulses at European XFEL

arXiv Physics Thursday 30 July 2026, 03:14 UTC By Ichiro Inoue, Ulrike Boesenberg, Rustam Rysov, Takahiro Sato, Ichika Harima, Chenzhi Xu, Jia Liu, Thomas M. Linker, Zain Abhari, Andrei Benediktovitch, Uwe Bergmann, Ye Chen, Lu Cao, Winfried Decking, Gianluca Geloni, Marc Guetg, Trey Guest, Aliaksei Halavanau, J\"{o}rg Hallmann, Takashi Kimura, Naresh Kujala, Aliaksandr Leonau, Shan Liu, Tianyun Long, Johannes M\"{o}ller, Taito Osaka, Jan-Etienne Pudell, Weilun Qin, Nina Rohringer, Angel Rodriguez-Fernandez, Daniele Ronchetti, Yasuhisa Sano, Matthias Scholz, Roman Shayduk, Jergus Strucka, Yanwen Sun, James Wrigley, Kazuto Yamauchi, Diling Zhu, Alexey Zozulya, Makina Yabashi, Anders Madsen, Jumpei Yamada, Jiawei Yan 1 min read
Key Points

Announce Type: new Abstract: By combining hard x-ray attosecond pulses from the European XFEL with total-reflection focusing x-ray optics, we generated nanofocused hard x-ray attosecond pulses with intensities and fluences comparable to the highest values attained in the hard x-ray regime. A peak intensity on the order of 10$^{20}$ W/cm$^2$ is confirmed through the observation of saturation in amplified spontaneous emission from copper atoms. These x-ray pulses enable new scientific...

arXiv:2607.26505v1 Announce Type: new Abstract: By combining hard x-ray attosecond pulses from the European XFEL with total-reflection focusing x-ray optics, we generated nanofocused hard x-ray attosecond pulses with intensities and fluences comparable to the highest values attained in the hard x-ray regime. A peak intensity on the order of 10$^{20}$ W/cm$^2$ is confirmed through the observation of saturation in amplified spontaneous emission from copper atoms. These x-ray pulses enable new scientific opportunities, including the exploration of higher-order nonlinear light--matter interactions, damage-free structure determination, and coherent control of atoms and molecules.
European XFEL arXiv:2607.26505v1 (ORG) the European XFEL (ORG)
Originally published by arXiv Physics Read original →

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