Posted on Feb 19 2016 - 7:58am by admin
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Since starting the tutorial series on coding for atom probe analysis, I’ve moved my codebase (well, the public part of it) to a Github repository. This way, I can push code to everyone following the tutorials as we go. The codebase is steadily growing, with additions on volume analysis (iso-surfaces, volume rendering) and mass spectrum analysis this week. If you are with us, go to: https://github.com/peterfelfer/AtomProbeTutorials The best thing to do is to install Github desktop and clone the repository. This way, you can update...

Posted on Feb 4 2016 - 3:22pm by admin
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Everyone loves a sequel, right? Just kidding… Now all issues regarding broadcasting are solved and from tomorrow on we will begin to stream basic tutorials on coding your own atom probe analysis with Matlab and a number of other programs. Tomorrow’s topic will be the basics: how do I get my data into Matlab, how do I handle and manipulate it and how do I do basic analysis (clipping, rotating, etc…). Watch it on my YouTube stream on 9:30 Central European Time every Friday if you want to be able to ask questions, otherwise...

Posted on Jan 19 2016 - 12:31pm by admin
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Many of you may have thought I am gone after a year of inactivity, but that’s definitely not the case. I have moved to the University of Erlangen N├╝rnberg, where I am heading my own atom probe group as a Junior Professor. This means, I am trying to get everyone here on a good level when it comes to creating their own custom coded analysis. From this week on, we will be streaming the basics tutorials live to my YouTube channel, sharing it with the world. We will be starting from the basics of analysis, up to the more advanced topics...

The starting point for any kind of data analysis in APT is knowing where objects like a phase or a thin layer etc. are. Most commonly this is done by analysis of the dataset cut into small cubes aka voxels. These voxels are then either directly visualised using volume rendering or via iso-surfaces. Iso-surfaces are much like height lines in a map; they connect points...

Posted on Dec 11 2014 - 12:27am by admin
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Unfortunately my download management software has stopped working and broke all links (sigh). Stay tuned, I’ve changed my download management software and will fix the links asap (asac). ...

One of the most common tasks in atom probe analysis is the calculation of a proximity histogram (see this paper from Hellman et al.). This is actually a very simple task, only involving calculating the distance between each atom and the interface and turning this into a concentration histogram. This is commonly done from is0-surfaces, but in principle it can be done...

In order to create analysis objects (stay tuned for the tutorials) we need to know where the boundary of the dataset is. This is to make sure that our analysis objects end exactly where the boundary is. In order to do that we can use either convex hulls or alpha hulls. Convex hulls can only delineate a boundary of a fully convex dataset, say if you have clipped a...

AtomBlend is a Blender plugin we have developed here in Sydney over the last few months by Vavara Efremova under the supervision of Anna Ceguerra, Simon Ringer and myself, Peter Felfer. Blender is a very powerful 3D visualisation and animation package and is widely used in professional computer graphics. The best thing about it: it’s free and open source, so...

Here’s a download link for the talk I gave on atom probe tomography of nanoparticles. I hope it will inspire other people to get into the lab and have a go at the problem. I am still very much learning how to do that too, so I hope to learn from all of you out there. Also: here are the links to the papers on the nanoparticles that are already published (JACS...

This is the talk I gave on interfacial excess mapping at the APT&M conference 2014. IE mapping is used to analyse the distribution of chemical elements, isotopes or ions at an interface created using either DCOM or iso-surfaces. There will be a paper in the proceedings ad I’ll make the programs available too…. stay tuned. ...