چكيده به لاتين
Abstract
Synchrotron radiation sources such as Iranian Light Source Facility (ILSF) are the unique tools for producing high brightness, high power and high power density. Standard x-ray beamline components consist of filters, slits, double-crystal monochromators, and focusing mirrors. Among these components, the double-crystal monochromators and focusing mirrors have the greatest importance, complexity, and cost.
Most of the hard X-ray beamlines at the synchrotron radiation facilities require a crystal monochromator to select a specific range of the energy with a high value of the resolution. It should be performed without degrading the quality of the beam.
One of the most important sources of the degradation is thermal distortion in the optical elements due to the large heat load. To minimize this degradation, it is customary to cool the crystal. Finite element (FE) analysis is done for optimization of the cooling geometry as well as the cooling parameters for each beamline. Parameters such as material properties, boundary conditions, power distribution and crystals cooling are used in this simulation. Simulation will determine the proper monochromotor for ILSF powder diffraction beamline. Then the information obtained from finite element analysis will be entered to the ray tracing program and the effect of heat loads can be seen in spot size.
Keywords: silicon monochromator, high heat load, finite element analysis, cooling systems
