Maud new version 2.992
Fixed an error in loading the GSAS parameter file. To fix it temporarily MAUD now loads only the function 1: PRCF1 and ignore the others. There is a second change that concern how texture angles are calculated. There was a mistake in the eta angles tensor that affected the texture angles calculation. To correct it now Maud considers that the eta angle follow a left handed system when viewed from the source as for the others tensors. In most cases this only affected the reference system for the texture, but in few cases (X-ray in reflection with both eta and chi angles different than zero) it it affected also the absorption correction computation. In this version the eta angle is inverted in the calculations resulting in the correct angles calcultation for all cases and a better absorption correction for some cases. But this will change the computation for the old refinements when the eta angle is involved (from the angular calibration to the texture orientation). So to keep the old analysis files still working in this release, Maud also inverts the eta angles set for each datafile when it detects a version of the file older than this release. So your calculation will remain the same. For all the new analyses be careful you may need to redo the calibration also if the eta angles are used, and the texture may look inverted respect to the vertical axis in the pole figures. To check the difference between the old and the new way to compute texture (and absorption) angles, you can switch between the new and old computation using the Maud preference “testing.invertEta”. If it is true the new (correct) calculation is used, false otherwise. Keep in mind that old analyses when loaded from an analysis file will have eta inverted before the calculation (in the angle setting for each datafile) in order to compensate the inversion in the calculation.
To download the new version of MAUD go to the download page.