20.500.12556/RUL-136950 Numerical simulation of heat load for multilayer laue lens under exposure to XFEL pulse trains Multilayer Laue lenses (MLLs) made from WC and SiC were previously used to focus megahertz X-ray pulse trains of the European XFEL free-electron laser, but suffered damage with trains of 30 pulses or longer at an incident fluence of about 0.13 J/cm[sup]2 per pulse. Here, we present numerical simulations of the heating of MLLs of various designs, geometry and material properties, that are exposed to such pulse trains. We find that it should be possible to focus the full beam of about 10 J/cm[sup]2 fluence of XFEL using materials of a low atomic number. To achieve high diffraction efficiency, lenses made from such materials should be considerably thicker than those used in the experiments. In addition to the lower absorption, this leads to the deposition of energy over a larger volume of the multilayer structure and hence to a lower dose, a lower temperature increase, and an improved dissipation of heat. X-ray free-electron lasers X-ray optics multilayer Laue lens heat transfer numerical simulation rentgenski laserji rentgenska optika večplastne leče Laue prenos toplote numerične simulacije true false true Angleški jezik Slovenski jezik Članek v reviji 2022-05-26 08:26:57 2022-05-26 08:27:04 2022-09-15 04:14:29 0000-00-00 00:00:00 2022 0 0 18 str. iss. 5, art. 362 Vol. 9 May 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2022-05-22 535:536.24:519.62 2304-6732 10.3390/photonics9050362 109202947 Rek_..._-_Numerical_simulation_of_heat_load_for_multilayer_laue_lens.pdf Rek_..._-_Numerical_simulation_of_heat_load_for_multilayer_laue_lens.pdf 1 CB63C5DFC8521B5F809564E0F84C8669 220f27de96997fccad13bcf6c93251e03ea0647f9ad4bc4b5ed5ddf88844a31e 8e304043-dcbd-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=156772 https://www.mdpi.com/2304-6732/9/5/362 1 ba655eac-dcbc-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=156770 Fakulteta za strojništvo 0 0 0