X-Ray Calc 3: improved software for simulation and inverse problem solving for X-ray reflectivity.

Area of Science:

• Materials Science
• Condensed Matter Physics
• Surface Science

Background:

• X-ray reflectivity (XRR) is a powerful technique for characterizing thin films and multilayers.
• Accurate structural reconstruction from XRR data is crucial for material development.
• Existing software may lack advanced fitting capabilities or user-friendly interfaces.

Purpose of the Study:

• To introduce X-Ray Calc (XRC), an open-source software for XRR simulation and structural reconstruction.
• To present the latest version, XRC3, highlighting its new features and improvements.
• To enhance the analysis of thin film structures using XRR data.

Main Methods:

• Utilizes a recursive approach based on Fresnel equations for XRR simulation.
• Incorporates specialized tools for modeling periodic multilayer structures.
• Features an automatic fitting capability using a modified particle swarm optimization algorithm.
• Introduces a novel cost function tailored for fitting periodic structures.

Main Results:

• XRC3 provides an enhanced user experience with a new single-window interface.
• Automatic fitting of XRR curves is achieved with improved accuracy.
• The software effectively simulates XRR and reconstructs complex film structures.
• Modeling of periodic multilayer structures is efficiently handled.

Conclusions:

• X-Ray Calc (XRC3) is a valuable, open-source tool for XRR analysis.
• The enhanced fitting algorithms and user interface improve the efficiency and accuracy of structural reconstruction.
• XRC3 facilitates advanced research in thin film and multilayer characterization.