QSTEM new version + GPU support

[Christoph Koch]

Dear all,

 

I apologize that it has taken so long, but I have now uploaded a new 64-bit version of qstem. This includes the latest improvements, including cool new added features to the qstem model builder (qmb) by Robert McCleod and other improvements to the package by Josh Taillon. I have also made sure that the coherent CBED mode with TDS works that some of you have seen to fail.

https://cloud.physik.hu-berlin.de/index.php/s/IxJtBH8r5TQsnPR or http://qstem.org/?page_id=25

Please let me know if you encounter any further problems.

 

Also, there is a totally new and screamingly fast multislice GPU-code called FDES (forward dynamical electron scattering – a slimmed down version of Wouter Van den Broek’s inverse dynamical electron scattering code) that reads qstem .qsc and .cfg files and can compute those configurations on the GPU. It also computes whole tomographic tilt series, focal series, etc.: https://github.com/woutervandenbroek/FDES

However, it currently only supports the TEM mode in .qsc files and can do CBED calculations. It must still be extended to also do STEM. A rudimentary python script comes with it that calls FDES to compute CBED computations at different probe positions. But for uncompromising STEM performance this should probably be done directly within the CUDA C-code. More about FDES here:

W. Van den Broek, X. Jiang, C.T. Koch, Ultramicroscopy 158 (2015) 89–97, DOI:10.1016/j.ultramic.2015.07.005

 

With best regards,

Christoph.

 

Prof. Christoph Koch, PhD

Humboldt University of Berlin

Department of  Physics

Structure Research & Electron Microscopy group

Newtonstraße 15

12489 Berlin, Germany

Tel: +49 [30] 2093-7640

 

Secretary:  Marion Götsch

Tel: +49 [30] 2093-7652

https://www.physik.hu-berlin.de/sem

 

Advanced Structural and Chemical Imaging: http://www.ascimaging.com/