# Open-Source Data Analysis Tool for Spectral Small-Angle X-ray Scattering Using Spectroscopic Photon-Counting Detector

## TL;DR

This paper introduces an open-source tool for analyzing sSAXS data using a 2D photon-counting detector, enabling detailed material characterization.

## Contribution

The novel contribution is an open-source graphical tool for sSAXS data analysis with energy-resolved capabilities.

## Key findings

- The tool successfully outputs 1D scattering patterns and 2D spatially-resolved maps.
- Validation with caffeine powder confirmed the tool's accuracy in capturing known scattering peaks.

## Abstract

Spectral small-angle X-ray scattering (sSAXS) is a powerful technique for material characterization from thicker samples by capturing elastic X-ray scattering data in angle- and energy-dispersive modes at small angles. This approach is enabled by the use of a 2D spectroscopic photon-counting detector that provides energy and position information of scattered photons when a sample is irradiated by a polychromatic X-ray beam. Here, we describe an open-source tool with a graphical interface for analyzing sSAXS data obtained from a 2D spectroscopic photon-counting detector with a large number of energy bins. The tool takes system geometry parameters and raw detector data to output 1D scattering patterns and a 2D spatially-resolved scattering map in the energy range of interest. We validated these features using data from samples of caffeine powder with well-known scattering peaks. This open-source tool will facilitate sSAXS data analysis for various material characterization applications.