THERMAL AND MECHANICAL MODELING OF X-RAY OPTICAL COMPONENTS OPERATING UNDER HIGH-HEAT LOADS IN FOURTH-GENERATION+ SYNCHROTRON RADIATION SOURCES
P.S. Zavyalov1, S.N. Makarov1, A.P. Belousov1, K.V. Zolotarev2, A.D. Nikolenko2, V.V. Ovsyannik2
1Design and Technology Institute of Scientific Instrument Engineering, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: synchrotron radiation front-ends, beam collimation, thermal modeling, mechanical stress analysis, finite element method
Abstract
The front-end is a section of the synchrotron radiation (SR) beamline intended to interface the vacuum, radiation, and optical conditions of the SR source with those of the experimental stations. This work presents thermal analyses of key front-end components developed for undulator beamlines 1-1 and 1-2 of the Siberian Circular Photon Source (SKIF). The expected output power of the SR beam from a linear undulator is 7.1 kW. The finite element method implemented in the COMSOL® Multiphysics 6.2 software package, along with the method of the non-uniform power density distribution, is used for simulations. The paper reports the development of front-end components and 3D modeling results of temperature fields and mechanical stresses under continuous thermal loading in ultra-high vacuum conditions. Calculations are carried out for the following components: fixed mask, movable photon shutter, adjustable mask, radiation shutter, diamond vacuum windows, thermal filters, and SR beam monitors. The obtained results demonstrate that the designed cooling systems for the front-end elements efficiently dissipate the incoming thermal power of the synchrotron beam and ensure their reliable operation.
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