Robin Y Engel, Oliver Alexander, Kaan Atak, Uwe Bovensiepen, Jens Buck, Robert Carley, Michele Cascella, Valentin Chardonnet, Gheorghe Sorin Chiuzbaian, Christian David, Florian Döring, Andrea Eschenlohr, Natalia Gerasimova, Frank de Groot, Loïc Le Guyader, Oliver S Humphries, Manuel Izquierdo, Emmanuelle Jal, Adam Kubec, Tim Laarmann, Charles-Henri Lambert, Jan Lüning, Jonathan P Marangos, Laurent Mercadier, Giuseppe Mercurio, Piter S Miedema, Katharina Ollefs, Bastian Pfau, Benedikt Rösner, Kai Rossnagel, Nico Rothenbach, Andreas Scherz, Justine Schlappa, Markus Scholz, Jan O Schunck, Kiana Setoodehnia, Christian Stamm, Simone Techert, Sam M Vinko, Heiko Wende, Alexander A Yaroslavtsev, Zhong Yin, Martin Beye
Free-electron lasers provide bright, ultrashort, and monochromatic x-ray pulses, enabling novel spectroscopic measurements not only with femtosecond temporal resolution: The high fluence of their x-ray pulses can also easily enter the regime of the non-linear x-ray-matter interaction. Entering this regime necessitates a rigorous analysis and reliable prediction of the relevant non-linear processes for future experiment designs. Here, we show non-linear changes in the <mml:math xmlns:mml="https://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>L</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>-edge absorption of metallic nickel thin films, measured with fluences up to 60 J/cm2 ...
September 2023: Structural Dynamics (Melville, N.Y.)