TIMEleSS Multigrain Wiki

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===== MAUD: Materials Analysis Using Diffraction ======

Maud is an a Rietveld extended program to perform the combined analysis. It can be used to fit diffraction, fluorescence and reflectivity data using X-ray, neutron, TOF or electrons.

{{ :software:maud2.jpg?400 |}}

List of MAUD features, as copied from the [[http://maud.radiographema.eu/|MAUD homepage]]
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  *     Written in Java can run on Windows, MacOSX, Linux, Unix (needs Java VM 1.7 or later)
  *     Easy to use, every action is controlled by a GUI
  *     Works with X-ray, synchrotron, Neutron, TOF and electrons
  *     Developed for Rietveld analysis, simultaneous multi spectra and different instruments/techniques supported
  *     Ab-initio structure solution integration, from peak finding, indexing to solving
  *     Different optimization algorithms available (Least Squares, Evolutionary, Simulated Annealing, Metadynamics, Simplex, Lamarckian…)
  *     Le Bail fitting
  *     Quantitative phase analysis wizard
  *     Microstructure analysis (size-strain, anisotropy, planar defects, turbostratic disorder and distributions included)
  *     Texture and residual stress analysis using part or full spectra
  *     MEEM and superflip algorithm for Electron Density Maps and fitting
  *     Thin film and multilayer aware; film thickness and absorption models
  *     Reflectivity fitting by different models, from Parratt (Matrix) to Discrete Born Approximation
  *     Fluorescence full pattern fitting based on crystal structure models (XRF and GIXRF full quantification)
  *     Works with TEM diffraction images and electron scattering
  *     Several datafile input formats
  *     Works with images from 2D detectors (image plates, CCDs, flat or curved), integration and calibration included
  *     CIF compliance for input/output; import structures from databases
  *     Many other features...look at the Maud in action page.
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===== How to import diffraction images into Maud =====

Maud uses //.esg// file format. To convert your //.tif// diffraction image, you can either use [[software:fit2d|Fit2D]] or (in case you are not familiar with Fit2D) a plugin in Maud.

=== Fit2D ===

...

=== Maud plugin ===

  - Convert your diffraction image to //.tif// format (if it isn't already). The [[software:timelesstools|TIMEleSS tools]] may be helpful for this.
  - Open Maud.
  - Click on //DataFileSet_X//, then the eye, then the //Datafiles// tab, then //From images//. A new window called //Area image// should open.
  - Click //File// and //Open//. Choose the diffraction image you want to refine (the one you converted to //.tif// earlier). A black window should appear (sometimes you can see some faint spots but usually it's pitch black).
  - Open the properties window by clicking on //Image// and //Properties//. Change the unit to //mm// and the pixel dimensions to the right size (for example 0.2 mm for P02.2 and 0.079 mm for ID27, respectively). Press //Ok//.
  - Click //Plugins//, then //Maud Plugins// and then //Multi-Spectra from normal transmission/reflection image//. A new parameter window opens.
  - Type in your //sample-detector distance// and beam center (//Center X// and //Center Y//) from your calibration. Put the //Tracker circle radius// to a 2θ value which is still completely visible on your diffraction images (usually 20° is fine). Put the //Final angle// to 360° and the //Number of spectra// to 72. Leave the other values default.
  - Click //Update//. This should move a red circle in your black screen to the center. If it has moved but not to the center you might have a type in the values entered above.
  - Click //Ok//. A save window should open. Save the image. Make sure it gets the ending //.esg//.
  - Close the //Area image// window. Don't save changes.
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