20.500.12556/DiRROS-21097 On the thermal stability of multilayer optics for use with high X-ray intensities High-intensity X-ray free electron laser (XFEL) beams require optics made of materials with minimal radiation absorption, high diffraction efficiency, and high radiation hardness. Multilayer Laue lenses (MLLs) are diffraction-based X-ray optics that can focus XFEL beams, as already demonstrated with tungsten carbide/silicon carbide (WC/SiC)-based MLLs. However, high atomic number materials such as tungsten strongly absorb X-rays, resulting in high heat loads. Numerical simulations predict much lower heat loads in MLLs consisting of low atomic number Z materials, although such MLLs have narrower rocking curve widths. In this paper, we first screen various multilayer candidates and then focus on Mo2C/SiC multilayer due to its high diffraction efficiency. According to numerical simulations, the maximum temperature in this multilayer should remain below 300°C if the MLL made out of this multilayer is exposed to an XFEL beam of 17.5 keV photon energy, 1 mJ energy per pulse and 10 kHz pulse repetition rate. To understand the thermal stability of the Mo2C/SiC multilayer, we performed a study on the multilayers of three different periods (1.5, 5, and 12 nm) and different Mo2C to SiC ratios. We monitored their periods, crystallinity, and stress as a function of annealing temperature for two different heating rates. The results presented in this paper indicate that Mo2C/SiC-based MLLs are viable for focusing XFEL beams without being damaged under these conditions. x-ray optics multilayer Laue lens thermal stability numerical simulation rentgenska optika večplastna leča Laue termična stabilnost numerične simulacije true false true Optica Publishing Group Združene države Amerike Angleški jezik Slovenski jezik Neznano 2024-12-20 11:43:14 2024-12-20 11:43:14 2024-12-21 03:36:18 0000-00-00 00:00:00 2024 0 0 Nasl. z nasl. zaslona; Opis vira z dne 4. 6. 2024; str. 1933-1948 iss. 8 Vol. 14 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2024-08-01 535:519.62 2159-3930 10.1364/OME.527226 200647939 RAZ_Zakharova_Margarita_2024.pdf RAZ_Zakharova_Margarita_2024.pdf 1 84E8BA6C7122A8162A059C79D7406C4F caa14317f0c76075192bfdeced2cbd622d97d5631d5e0b7a2f528e3cff419fb1 56466c77-bec1-11ef-ba3f-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=29902 https://opg.optica.org/ome/fulltext.cfm?uri=ome-14-8-1933&id=553006 1 39cc792f-bebf-11ef-ba3f-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=29901 Inštitut za kovinske materiale in tehnologije 0 0 0