Optimization of compact Soller collimator

TL;DR

This paper investigates optimizing a compact Soller collimator for soft X-ray radiation at 4 nm by analyzing effects of length, material, and wall roughness, revealing diffraction limits and efficient configurations.

Contribution

It introduces an optimized design approach for Soller collimators considering material, roughness, and geometry to improve X-ray collimation efficiency.

Findings

Diffraction effects become significant at channel widths of 0.02-0.04 mm.

Collimation angles limited to 0.014 and 0.007 radians for carbon dust detection.

Lighter materials with rougher walls and fewer reflections reduce losses.

Abstract

The opportunity of optimization of collimator was investigated by changing collimator length, material and wall roughness for soft x-ray radiation with wavelength 4 nm corresponding to carbon atoms absorption. From the obtained results follows that effects of diffraction become significant for channel widths up to 0.02 - 0.04 mm. Collimation angle was limited to 0.014 and 0.007 radian for carbon dust detection. The choice of lighter material with greater height of roughness in shorter collimator with 2 reflections results in considerably lower losses than for heavier materials and smoother walls where 4 reflections required.