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@inproceedings{lushtak:ipac2021-wepab410,
author = {Y. Lushtak and Y. Li and A. Lyndaker},
title = {{Finite Element Analyses of Synchrotron Radiation Induced Stress in Beryllium Synch-Light Mirrors}},
booktitle = {Proc. IPAC'21},
pages = {3664--3666},
eid = {WEPAB410},
language = {english},
keywords = {dipole, simulation, synchrotron, scattering, operation},
venue = {Campinas, SP, Brazil},
series = {International Particle Accelerator Conference},
number = {12},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2021},
issn = {2673-5490},
isbn = {978-3-95450-214-1},
doi = {10.18429/JACoW-IPAC2021-WEPAB410},
url = {https://jacow.org/ipac2021/papers/wepab410.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-WEPAB410},
abstract = {{Mirrors made of high purity beryllium are used in particle accelerators to extract synchrotron radiation (SR) in the visible range for transverse and longitudinal particle beam profile measurements. Be is a high-strength, high thermal conductivity material. As a low-Z metal, it allows high-energy photons to penetrate the mirror body, so that majority of the SR power is dissipated, resulting in a significantly reduced thermal stress and distortion on the mirror surface. In this paper, we describe a Finite Element Analysis method of accurately simulating the SR-induced thermal stress on the beryllium mirrors at the Cornell Electron Storage Ring at various particle beam conditions. The simulations consider the energy dependence of X-ray attenuation in beryllium. The depth-dependent distribution of the power absorbed by the mirror is represented by separate heating zones within the mirror model. The results help set the operational safety limit for the mirrors-ensuring that the SR-induced thermal stress is below the elastic deformation limit and estimate the mirror surface distortion at high beam currents. The simulated surface distortion is consistent with optical measurements.}},
}