Thermo-mechanical analysis of fixed mask 1 for the advanced photon source insertion device front ends

Abstract

The first fixed mask is one of the critical elements on the insertion device front ends of the beamlines at the Advanced Photon Source now under construction at Argonne National Laboratory. The heat flux from the undulators will be very large. We simulated the X-ray beam at several locations to ensure that the worst possible case was considered. The maximum temperature (about 180°C) occurs when the beam hits the center of the horizontal surface. The maximum effective stress (about 313 MPa) occurs when the X-ray beam hits at or near the corners.