Ultra high energy resolution focusing monochromator for inelastic X-ray scattering spectrometer

TL;DR

This paper presents an advanced focusing monochromator design achieving ultra-high energy resolution below 0.1 meV for inelastic X-ray scattering, supported by theoretical analysis and numerical simulations.

Contribution

It introduces a novel monochromator concept with detailed optical layout analysis and simulation validation for ultra-high energy resolution in X-ray spectroscopy.

Findings

Achieved energy resolution of 0.1 meV or better.

Demonstrated faster decay of resolution function tails than Gaussian.

Validated design through numerical simulations.

Abstract

A further development of a focusing monochromator concept for X-ray energy resolution of 0.1 meV and below is presented. Theoretical analysis of several optical layouts based on this concept was supported by numerical simulations performed in the "Synchrotron Radiation Workshop" software package using the physical-optics approach and careful modeling of partially-coherent synchrotron (undulator) radiation. Along with the energy resolution, the spectral shape of the energy resolution function was investigated. It was shown that under certain conditions the decay of the resolution function tails can be faster than that of the Gaussian function.