Heat load and anticlastic effect compensation on an ESRF monochromator: An exhaustive ray-tracing study for a meridional-sagittal geometry

Journal Article · Wed Jan 01 04:00:00 EST 1992 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1142691· OSTI ID:5569526

Zontone, F; Comin, F ^[1]

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1. European Synchrotron Radiation Facility, B. P. 220, 38043 Grenoble Cedex (France)

Undulators installed in third-generation synchrotron radiation facilities will provide photon beams with high brilliance and large power densities. The optical quality of these beams allows, in principle, the use of simpler optical systems for focusing and monochromatization. In practice the performance of the optical elements is the physical limit to the exploitation of these high brilliance beams. In double-crystal monochromators the bending of the first crystal due to the thermal load and the anticlastic effect on the sagittally bent second one are among the main sources of problems on the overall performances. Here we have considered a double-crystal monochromator with a meridionally bent first crystal followed by a sagittally focusing one. We show that this geometry offers correction either of thermal loads and anticlastic distortions, or minimization of the bandpass or tangential focusing. This can be particularly useful on the high-energy range and for sharp Bragg reflections.

• OSTI ID: 5569526
• Journal Information: Review of Scientific Instruments; (United States), Journal Name: Review of Scientific Instruments; (United States) Vol. 63:1; ISSN RSINA; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430303* -- Particle Accelerators-- Experimental Facilities & Equipment
430400 -- Particle Accelerators-- Storage Rings
BEAMS
BENDING
BRAGG REFLECTION
DEFORMATION
ENERGY DEPOSITION
EXPANSION
FOCUSING
HEAT DISTRIBUTION SYSTEMS
MATHEMATICS
MONOCHROMATORS
NUMERICAL ANALYSIS
PERFORMANCE TESTING
PHOTON BEAMS
POWER DENSITY
RADIATION SOURCES
REFLECTION
STORAGE RINGS
SYNCHROTRON RADIATION SOURCES
TEMPERATURE GRADIENTS
TESTING
THERMAL EXPANSION