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TY - CONF AU - Petrov, I. AU - Anton, J.W.J. AU - Boesenberg, U. AU - Dommach, M. AU - Dong, X. AU - Eidam, J. AU - Hallmann, J. AU - Kazarian, K. AU - Kearney, S.P. AU - Kim, C. AU - Lu, W. AU - Madsen, A. AU - Möller, J. AU - Reiser, M. AU - Samoylova, L. AU - Shayduk, R. AU - Shu, D. AU - Sinn, H. AU - Sleziona, V. AU - Zozulya, A. ED - Schaa, Volker R.W. ED - Decking, Winfried ED - Sinn, Harald ED - Geloni, Gianluca ED - Schreiber, Siegfried ED - Marx, Michaela TI - Effect of Heat Load on Cryo-Cooled Monochromators at the European X-Ray Free-Electron Laser: Simulations and First Experimental Observations J2 - Proc. of FEL2019, Hamburg, Germany, 26-30 August 2019 CY - Hamburg, Germany T2 - Free Electron Laser Conference T3 - 39 LA - english AB - European XFEL (EuXFEL) generates high-intensity ultra-short pulses at MHz repetition rate. At hard X-ray instruments, cryo-cooled silicon monochromators are used to reduce pulse bandwidth. Here, first experimental observations during commissioning of a cryo-cooled monochromator at Materials Imaging and Dynamics (MID) instrument are presented and compared with heat flow simulations. A thermal relaxation time is estimated and compared with arrival time interval between pulses. This provides the repetition rate tolerable for stable operation of monochromator. PB - JACoW Publishing CP - Geneva, Switzerland SP - 502 EP - 505 KW - FEL KW - experiment KW - simulation KW - electron KW - photon DA - 2019/11 PY - 2019 SN - "" SN - 978-3-95450-210-3 DO - doi:10.18429/JACoW-FEL2019-WEP079 UR - http://jacow.org/fel2019/papers/wep079.pdf ER -