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Volume 25 Number 2 April 2019


table of contents


Dear Abbe


Dear Abbe, My colleagues, mostly ecologists and mineralogists,


are always chiding me for being a laboratory worker instead of a field worker. Adding insult to injury, they usually harass me while I am doing microscopy on their samples. I have spent much time working in remote field locations, and preparing samples collected in the field for work in the microscopy lab. How can I open their eyes to microscopy as a field science? Chided in Chillicothe


Dear Chided, I understand your problem. Many people think that I


My Life With Erwin: Te Beginning of an Atom-Probe Legacy John A. Panitz


Atom Probe Reconstruction With a Locally Varying Emitter Shape Daniel Beinke and Guido Schmitz


Introducing a Crystallography-Mediated Reconstruction (CMR) Approach to Atom Probe Tomography Alec C. Day, Anna V. Ceguerra and Simon P. Ringer


Calibration of Atom Probe Tomography Reconstructions Trough Correlation with Electron Micrographs Isabelle Mouton, Shyam Katnagallu, Surendra Kumar Makineni, Oana Cojocaru-Mirédin, Torsten Schwarz, Leigh Tomas Stephenson, Dierk Raabe and Baptiste Gault


Assessing the Spatial Accuracy of the Reconstruction in Atom Probe Tomography and a New Calibratable Adaptive Reconstruction Anna V. Ceguerra, Alec C. Day and Simon P. Ringer


Building a Library of Simulated Atom Probe Data for Different Crystal Structures and Tip Orientations Using TAPSim Markus Kühbach, Andrew Breen, Michael Herbig and Baptiste Gault


DF-Fit: A Robust Algorithm for Detection of Crystallographic Information in Atom Probe Tomography Data Daniel Haley, Paul A. J. Bagot and Michael P. Moody


Te Application of the OPTICS Algorithm to Cluster Analysis in Atom Probe Tomography Data


Jing Wang, Daniel K. Schreiber, Nathan Bailey, Peter Hosemann and Mychailo B. Toloczko


A Precise Method for Analysis of Elemental Distribution Inside Solute Clusters Takumi Kitayama, Masaya Kozuka, Yasuhiro Aruga and Chikara Ichihara


Atom Probe Tomography Interlaboratory Study on Clustering Analysis in Experimental Data Using the Maximum Separation Distance Approach Yan Dong, Auriane Etienne, Alex Frolov, Svetlana Fedotova, Katsuhiko Fujii, Koji Fukuya, Constantinos Hatzoglou, Evgenia Kuleshova, Kristina Lindgren, Andrew London, Anabelle Lopez, Sergio Lozano-Perez, Yuichi Miyahara, Yasuyoshi Nagai, Kenji Nishida, Bertrand Radiguet, Daniel K. Schreiber, Naoki Soneda, Mattias Tuvander, Takeshi Toyama, Jing Wang, Faiza Seſta, Peter Chou and Emmanuelle A. Marquis


Enhancing Element Identification by Expectation–Maximization Method in Atom Probe Tomography Francois Vurpillot, Constantinos Hatzoglou, Bertrand Radiguet, Gerald Da Costa, Fabien Delaroche and Frederic Danoix


Quantifying Uncertainty from Mass-Peak Overlaps in Atom Probe Microscopy Andrew J. London


An Automated Computational Approach for Complete In-Plane Compositional Interface Analysis by Atom Probe Tomography Zirong Peng, Yifeng Lu, Constantinos Hatzoglou, Alisson Kwiatkowski da Silva, Francois Vurpillot, Dirk Ponge, Dierk Raabe and Baptiste Gault


Te Influence of Isoconcentration Surface Selection in Quantitative Outputs from Proximity Histograms Dallin J. Barton, B. Chad Hornbuckle, Kristopher A. Darling and Gregory B. Tompson


A Gas-Phase Reaction Cell for Modern Atom Probe Systems Daniel Haley, Ingrid McCarroll, Paul A. J. Bagot, Julie M. Cairney and Michael P. Moody


Spatial and Compositional Biases Introduced by Position Sensitive Detection Systems in APT: A Simulation Approach C. Bacchi, G. Da Costa and F. Vurpillot


A Study of Parameters Affecting Atom Probe Tomography Specimen Survivability Ty J. Prosa, Savanna Strennen, David Olson, Dan Lawrence and David J. Larson


2019 May • www.microscopy-today.com


am only a laboratory scientist. A great one, but still “only a laboratory scientist.” Nothing could be further than the truth. I built a field microscopy laboratory in Prof. Stümpke’s rooms at the Darwin Institute in the Hy-yi-yi archipelago. I remember those days well, chasing Otopteryx with a rein- forced butterfly net while dodging ferocious Tyrannonasus. Tis field work even led to what should have been a great breakthrough in digital image storage, if not for a verdammt supply clerk, who turned out to be an amateur magician. I was busy creating a novel from Prof. Stümpke’s unpublished manuscripts and images of rhinogrades, which were sadly deteriorating. Tis was in the days of 540k floppy discs, and high-quality digital images were impossible to store. So, during a night of Schnapps-inspired arithmetizing, I realized the images were just numbers on a x by y Carte- sian grid. So, write (x,y)n for the size of the grid image and the bit depth, and follow that with all the numbers strung together—all the x numbers in the first line, then stick on all the x numbers in the second line und so weiter until the yth line. Which gives an impossibly long number to write. Unless one uses tetration! Ten suddenly a million or more digits becomes something like 3


17, which is very easy to


write. And store on a measly 540k floppy drive. Unfortu- nately, the Schnapps-inspired arithmetizing continued into a Schnapps-inspired attempt to create a new flaming cock- tail. All my notes on how to turn a gigantische Zahl into a winzige Anzahl turned out to be written on our amateur magician’s supplied flash-paper and Voopf! everything went up in flames. No matter the quantity of Schnapps, I never have remembered how to calculate a tetration of a gigan- tische Zahl.


If you’ve ever taken a bad fall in the field, you can


appreciate what “Schnapps-inspired” really means. If your colleagues chide you for your work in the field, contact Herr Abbe through his faithful assistant at johnshields59@ gmail.com.


doi:10.1017/S1551929519000385 53


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