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TY - CONF AU - Volpe, L.M. AU - Claudiano, G.V. AU - Geraldes, R.R. AU - Luiz, S.A.L. AU - Pinto, A.C. ED - Schaa, Volker RW ED - Tavakoli, Keihan ED - Tilmont, Manuel TI - Optimization Method Using Thermal and Mechanical Simulations for Sirius High-Stability Mirrors J2 - Proc. of MEDSI2018, Paris, France, 25-29 June 2018 C1 - Paris, France T2 - Mechanical Engineering Design of Synchrotron Radiation Equipment and Instrumentation T3 - 10 LA - english AB - The mirrors for Sirius, the new 4th-generation synchrotron at the Brazilian Synchrotron Light Laboratory (LNLS), have strict requirements regarding thermo-mechanical stability and deformations, with figure height and slope errors limited to a few nanometers and tens of nanoradians, respectively. Therefore, fixed-shape mirrors have been defined with horizontally-reflecting orientation (except for vertically-reflecting mirrors of KB systems), whereas their cooling schemes (namely, air, water or liquid nitrogen cooling) depend on the particular power load. A thermal and mechanical optimization method was developed to guide the design of mirrors through the evaluation of deformations caused by power load, cooling, gravity, tightening of the fastening screws, manufacturing errors and modal analyses. Up to now, this method was already used to define the mirrors of Sirius' beamlines, which include plane, cylindrical, elliptical and ellipsoidal mirrors, as well as KB systems for microprobe and nanoprobe stations. Two examples are presented to illustrate the method. PB - JACoW Publishing CP - Geneva, Switzerland SP - 273 EP - 276 KW - simulation KW - cryogenics KW - synchrotron KW - radiation KW - photon DA - 2018/12 PY - 2018 SN - 978-3-95450-207-3 DO - 10.18429/JACoW-MEDSI2018-WEPH31 UR - http://jacow.org/medsi2018/papers/weph31.pdf ER -