MAUD is freely available for download at the program website.
Newer models of MAUD should be fairly straight forward to install. Be sure to read the instructions available in the download section of the MAUD website though.
Information for beginners
If you have never used MAUD before, now is a pretty good time to take out a few hours of your day to take a look at the series of tutorial videos that have been made by the author of the program, Luca Lutterotti. These YouTube videos are split into a number of categories:
- Download, installation and first run
- Modelling your standard, parts 1, 2, 3, 4 and 5.
- Inputting 2D data to MAUD, parts 1, 2, 3, 4, 5 and 6.
- Debye Scherrer curved 2D data
- Texture modelling with data from the ILL, parts 1 (also covers the installation process in older versions), 2 and 3.
Two tutorial papers on MAUD, published in Powder Diffraction, can also serve as good starting points to understanding how the program works, especially if one follows the detailed guidelines provided in their appendices. You should be able to download the two papers by using the links below:
- Calibration and basic analysis Paper link,Supplementary material link.
- Complex multiphase samples and Diamond Anvil Cells Paper link, Supplementary material download.
These are collected in a separate thread, linked to here. When Q&A's (hopefully) begin to appear in this subforum they will also be linked to from here. Problems described and solved in the thread include:
- Cholesky negative diagonal
- MAUD claiming convergence too early
There are quite a lot of different models in MAUD that can be selected. Below follows lists of the original papers that the various models are based on.
Size/strain (peak broadening) models:
Isotropic (Delft) model
One very strong feature (some would argue its raison d'être) of MAUD is its ability to "slice" 2D powder diffraction datasets in order to model texture (also known as preferred orientation) and/or lattice strain (macro strain). Doing so not only requires quite good data, but also a fairly good understanding of what one is doing.
Modelling of texture
I know very little about this (rather complex) topic and will thus defer much description here until an expert can contribute. That said, a texture tutorial can be found here.
Modelling of macrostrain at high pressure
Finding easily understood literature/guidance in this area can be very difficult, but one very good source of information is the website of Sebastién Merkel of Université Lille. Being a geologist he clearly knows his strain theory and is the one who wrote the "Radial diffraction in the DAC" model in MAUD. To begin modelling data in this fashion one should take a look at his overview page of content for modelling of diamond anvil cell data.
It should be mentioned that the website of Merkel and the tutorial papers all exclusively deal with radial diffraction. This is not a very common way to do diamond anvil cell experiments in the chemistry/physics community who prefer to carry out measurements on-axis (in transmission through the diamonds). I will create a thread to explain how to model this type of data.