Thermal And Structural Analyses Of A Synchrotron Radiation X-Ray Monochromator With Liquid Gallium And Water Cooling

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Abstract
The finite element method is used in the thermal and structural analyses of a 3-channel silicon-crystal monochromator in a wiggler x-ray beam. Liquid gallium and water are used as coolants. Liquid gallium is fed into the monochromator by an induction pump designed and built for this purpose at Argonne National Laboratory. The choice of gallium as a coolant is based on its high thermal conductivity, very low vapor pressure (appropriate in high vacuum environments), nontoxicity, and stability. For contrast, a parallel analysis for the monochromator cooled with water is also presented. The results of this analysis are compared with the experimental data taken at the Cornell High Energy Synchrotron Source (CHESS) using a 6-pole wiggler as the radiation source.

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