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|Title||Heat Load Simulation of Optic Materials at European XFEL|
|Abstract||The European XFEL GmbH, located in Hamburg area in Germany, is the X-ray free electron laser light source which has been in the operation since 2017. It is designed to provide users high intensity X-ray beam with 27000 pulses/s repetition rate in the photon energy range from 0.5 to 25 keV*. In the beam transport system, the optic components which have direct contact with the beam, e.g. mirror, absorber and beam shutter, etc., could get up to 10 kW heat load on a sub-mm spot in 0.6 ms. Therefore, the thermo-mechanical performance of these optic components is playing an important role in the safety operation of the facility, restricting the maximum allowed beam power delivered to each experiment station. In this contribution, using finite element simulation tools, a parametric study about coupled thermo-mechanical behavior of some general used materials, e.g. CVD diamond, B4C, silicon, etc. is presented. Based on the design of several devices which are already in operation at European XFEL**, an initial damage threshold for these materials is established, with respect to the corresponding beam parameters. Furthermore, the relevant analytical and numerical solutions are discussed and compared, taking the material and geometrical nonlinearities into account. These simulation results can be referred as design and operation benchmark for the optic elements in the beamlines.|
|Footnotes & References||*Altarelli, M. et al., The XFEL Technical Design Report, 2006.
**Tschentscher, Th. et al., Photon Beam Transport and Scientific Instruments at the European XFEL, Applied Sciences 7(6):592, 2017.
|Paper||download THOB02.PDF [1.373 MB / 3 pages]|
|Slides||download THOB02_TALK.PDF [1.911 MB]|
|Export||download ※ BibTeX ※ LaTeX ※ Text/Word ※ RIS ※ EndNote|
|Series||Mechanical Engineering Design of Synchrotron Radiation Equipment and Instrumentation (11th)|
|Location||Chicago, IL, USA|
|Date||24-29 July 2021|
|Publisher||JACoW Publishing, Geneva, Switzerland|
|Editorial Board||Yifei Jaski (ANL, Lemont, IL, USA); Patric Den Hartog (ANL, Lemont, IL, USA); Kelly Jaje (ANL, Lemont, IL, USA); Volker R.W. Schaa (GSI, Darmstadt, Germany)|
|Received||21 July 2021|
|Accepted||28 September 2021|
|Issue Date||29 October 2021|