TOPAS Tutorials

Here you will find all of the TOPAS tutorials presented at the XPDF Analysis Workshop 2024.

Not all tutorials will be of relevance to your analysis needs, so feel free to pick and choose which tutorials you follow. We do however recommend all to complete tutorials 1-3 to understand the core theory.

Here you will find a summary of what each tutorial includes:

Tutorial	Summary	Appropriate to:	Prerequisite
Introduction to TOPAS and jEdit	Basic overview of TOPAS, the macros available, brief descriptions and simple Pawley refinements.	Reference for all People completely new to TOPAS should complete the Pawley refinement before moving on	N/A
PDF Introduction - Basic Refinements	How to run a simple PDF refinement using the PDF macros.	All	N/A
Instrumental Parameters - dQ, alpha and lor	Deeper dive into what the dQ, alpha and Lorentzian functions do and how to asertain them from your PDF instrument.	All	N/A
Correlation Motion - Beq Parameters	Discussion of the beq parameters within PDF refinements and how they differ to the standard thermal parameters in diffraction experiements.	All	N/A
Combining Data - The Power of Dual Refinements	How to use X-ray and neutron PDF data to obtain the best possible fit.	Dual radiation (X-ray/Neutron) source users	1-3
Rigid Bodies - Paracetamol & Well-defined Geometries	How to use the (1) rigid body editor, (2) how to create rigid bodies and (3) how to use rigid bodies in a refinement	Organics, pharmaceuticals and rigid structures	1-3

For any further information, comments or queries, please contact xpdf@diamond.ac.uk