Speaker
Marziyeh Sadat Tavakkoly
(ILSF)
Description
Most of the hard X-ray beamlines at the synchrotron radiation facilities require a crystal monochromator to select a particular range of the energy with a high value of the resolution. This job must be performed without degrading the quality of the beam that is characterized by the flux, brilliance and the resolution.
One of the most important sources of the degradation is thermo-mechanical distortion in the optical elements because of the large heat load. To minimize this degradation, it is customary to cool the crystal. For ultrahigh heat loads (radiation from the insertion devices) the cooling method is direct and the coolant is liquid gallium. Finite element (FE) analysis is done for optimization of the cooling geometry as well as the cooling parameters for each beamline.
At this work it is shown, a crystal that is directly cooled by flowing liquid gallium is suitable for Powder Diffraction beamline. Our simulations illustrate that a liquid gallium-cooled Si (111) slotted crystal will work appropriate under the heat load of the ILSF typical wiggler beam.
Author
Marziyeh Sadat Tavakkoly
(ILSF)
