scholarly journals Evaluation of Detection Efficiency of Atom Probe Tomography

2014 ◽  
Vol 20 (3) ◽  
pp. 177-181
Author(s):  
Masato Morita ◽  
Masanobu Karasawa ◽  
Takahiro Asaka ◽  
Masanori Owari
Keyword(s):  
Atom Probe Tomography ◽  
Detection Efficiency ◽  
Atom Probe

Spatial Distribution Maps for Atom Probe Tomography

2007 ◽  
Vol 13 (6) ◽  
pp. 437-447 ◽  
Author(s):  
Brian P. Geiser ◽  
Thomas F. Kelly ◽  
David J. Larson ◽  
Jason Schneir ◽  
Jay P. Roberts
Keyword(s):  
Spatial Distribution ◽  
Atom Probe Tomography ◽  
Detection Efficiency ◽  
Structural Information ◽  
Atom Probe ◽  
Dark Field ◽  
Distribution Functions ◽  
Orientation Relationships ◽  
Distribution Maps ◽  
Space Technique

A real-space technique for finding structural information in atom probe tomographs, spatial distribution maps (SDM), is described. The mechanics of the technique are explained, and it is then applied to some test cases. Many applications of SDM in atom probe tomography are illustrated with examples including finding crystal lattices, correcting lattice strains in reconstructed images, quantifying trajectory aberrations, quantifying spatial resolution, quantifying chemical ordering, dark-field imaging, determining orientation relationships, extracting radial distribution functions, and measuring ion detection efficiency.

scholarly journals Measurement of Detection Efficiency in Atom Probe Tomography

2014 ◽  
Vol 20 (S3) ◽  
pp. 1160-1161
Author(s):  
T.J. Prosa ◽  
B.P. Geiser ◽  
R.M. Ulfig ◽  
T.F. Kelly ◽  
D.J. Larson
Keyword(s):  
Atom Probe Tomography ◽  
Detection Efficiency ◽  
Atom Probe

scholarly journals Atom-Probe Tomography: Detection Efficiency and Resolution of Nanometer-Scale Precipitates in a Ti-5553 Alloy

2016 ◽  
Vol 22 (S3) ◽  
pp. 702-703 ◽  
Author(s):  
D. Isheim ◽  
J. Coakley ◽  
A. Radecka ◽  
D. Dye ◽  
T.J. Prosa ◽  
...  
Keyword(s):  
Atom Probe Tomography ◽  
Detection Efficiency ◽  
Atom Probe ◽  
Nanometer Scale

scholarly journals Improving Compositional Accuracy in APT Analysis of Carbides Using a Decreased Detection Efficiency

2019 ◽  
Vol 25 (2) ◽  
pp. 454-461
Author(s):  
Mattias Thuvander ◽  
Deodatta Shinde ◽  
Arbab Rehan ◽  
Sebastian Ejnermark ◽  
Krystyna Stiller
Keyword(s):  
Carbon Concentration ◽  
Atom Probe Tomography ◽  
Dead Time ◽  
Detection Efficiency ◽  
Atom Probe ◽  
Statistical Uncertainty ◽  
Carbon Ions ◽  
Close Proximity ◽  
Pile Up ◽  
Preferential Loss

AbstractThe composition of carbides in steel, measured by atom probe tomography, can be influenced by limitations in the ion detector system. When carbides are analyzed, many ions tend to field evaporate from the same region of the specimen during the same laser or voltage pulse. This results in a so-called multiple event, meaning that several ions impact the detector in close proximity both in time and space. Due to a finite detector dead-time not all ions can be detected, a phenomenon known as detector pile-up. The evaporation behavior of carbon is often different than the evaporation behavior of metals when analyzing alloy carbides, leading to preferential loss of carbon ions, and a measured carbon concentration below the expected value. This effect becomes stronger as the overall detection efficiency gets higher. Here, the detection efficiency was deliberately reduced by inserting a grid into the flight-path, which resulted in a higher and more correct carbon concentration, accompanied by an increase in the statistical uncertainty.

Atom probe tomography evaporation behavior of C-axis GaN nanowires: Crystallographic, stoichiometric, and detection efficiency aspects

2013 ◽  
Vol 114 (18) ◽  
pp. 184903 ◽  
Author(s):  
David R. Diercks ◽  
Brian P. Gorman ◽  
Rita Kirchhofer ◽  
Norman Sanford ◽  
Kris Bertness ◽  
...  
Keyword(s):  
Atom Probe Tomography ◽  
Detection Efficiency ◽  
Atom Probe ◽  
Gan Nanowires

Developing detection efficiency standards for atom probe tomography

2014 ◽  
Author(s):  
Ty J. Prosa ◽  
Brian P. Geiser ◽  
Dan Lawrence ◽  
David Olson ◽  
David J. Larson
Keyword(s):  
Atom Probe Tomography ◽  
Detection Efficiency ◽  
Atom Probe

scholarly journals Correlating nanoscale secondary ion mass spectrometry and atom probe tomography analysis of uranium enrichment in metallic nuclear fuel

The Analyst ◽  
2021 ◽  
Vol 146 (1) ◽  
pp. 69-74
Author(s):  
Elizabeth Kautz ◽  
John Cliff ◽  
Timothy Lach ◽  
Dallas Reilly ◽  
Arun Devaraj
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Fuel ◽  
Atom Probe Tomography ◽  
Secondary Ion Mass Spectrometry ◽  
Atom Probe ◽  
Uranium Enrichment ◽  
Length Scales ◽  
Atom Probe Tomography Analysis ◽  
Secondary Ion ◽  
Tomography Analysis

235U enrichment in a metallic nuclear fuel was measured via NanoSIMS and APT, allowing for a direct comparison of enrichment across length scales and resolutions.

scholarly journals Inside Front Cover: Atom Probe Tomography of Encapsulated Hydroxyapatite Nanoparticles (Small Methods 2/2021)

Small Methods ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 2170004
Author(s):  
Daniel S. Mosiman ◽  
Yi‐Sheng Chen ◽  
Limei Yang ◽  
Brian Hawkett ◽  
Simon P. Ringer ◽  
...  
Keyword(s):  
Atom Probe Tomography ◽  
Atom Probe ◽  
Hydroxyapatite Nanoparticles ◽  
Front Cover
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