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Sirius, the new Brazilian fourth-generation synchrotron light source, is currently under construction. Due to the high brilliance and low emittance of its source, the pho-ton beam on each undulator beamline can have power densities as high as 55 W/mrad². To protect the compo-nents downstream, the Front-End power absorbers need to manage this power in a limited space, but also having precision in alignment and being reliable all over their lifetime. To achieve this behaviour, the selected alloydoi:10.18429/jacow-medsi2018-tuph09 fatcat:5bpkkc5ezjhqrhfumfjp7tlkti