KSLStrain    

How to proceed in order to determine strain tensor from multiple patterns?

A complete strain tensor (complete set of lattice parameters) can be determined form one or multiple Kossel diffraction patterns originating from the same point of the sample. Assuming that a set of patterns in (proper digital format) is given, use the interface in the following way:

• Load simultaneously all patterns of the set. 
• For a given pattern: 

1. enter correct settings using “Settings” command button,
2. mark Kossel lines in the experimental pattern,
3. if pattern center, camera length and/or orientation are not known, use the 'PC', 'Indexing' and 'PCL' buttons to determine their approximations, 
4. fine tune the orientation (and other parameters, if necessary) using geometrically simulated pattern (which can be displayed by clicking on  “Simulate pattern” command button) and the “Fine-tuning”  frame box,
5. save the data for the pattern using “Save data” command button.

• Repeat the above steps for all patterns.
• Save the data for all patterns using menu “File/Save project as”.
• Determine the strain tensor using “Strain” command button.

When saved, projects are written in .kspr files. These files should be kept in the same directory as all .bmp files containing patterns of the project. If this directory is changed, the path specified in the .kspr file must be corrected.