Cold-Start of a PEFC Visualized with High Resolution Dynamic In-Plane Neutron Imaging

2011 ◽  
Vol 159 (2) ◽  
pp. B235-B245 ◽  
Author(s):  
P. Oberholzer ◽  
P. Boillat ◽  
R. Siegrist ◽  
R. Perego ◽  
A. Kästner ◽  
...  
Keyword(s):  
High Resolution ◽  
Cold Start ◽  
Neutron Imaging

scholarly journals High-resolution neutron imaging: a new approach to characterize water in anodic aluminum oxides

2020 ◽  
Vol 8 ◽  
pp. 100121
Author(s):  
Noémie Ott ◽  
Claudia Cancellieri ◽  
Pavel Trtik ◽  
Patrik Schmutz
Keyword(s):  
High Resolution ◽  
Neutron Imaging ◽  
Aluminum Oxides ◽  
New Approach ◽  
Anodic Aluminum

scholarly journals Neutron Imaging Using a Fine-Grained Nuclear Emulsion

2021 ◽  
Vol 7 (1) ◽  
pp. 4
Author(s):  
Katsuya Hirota ◽  
Tomoko Ariga ◽  
Masahiro Hino ◽  
Go Ichikawa ◽  
Shinsuke Kawasaki ◽  
...  
Keyword(s):  
Image Analysis ◽  
High Resolution ◽  
Neutron Detector ◽  
Nuclear Emulsion ◽  
Neutron Imaging ◽  
The Other ◽  
Crystal Oscillator ◽  
Fine Grained ◽  
Cold Neutrons ◽  
Track Analysis

A neutron detector using a fine-grained nuclear emulsion has a sub-micron spatial resolution and thus has potential to be applied as high-resolution neutron imaging. In this paper, we present two approaches to applying the emulsion detectors for neutron imaging. One is using a track analysis to derive the reaction points for high resolution. From an image obtained with a 9 μm pitch Gd grating with cold neutrons, periodic peak with a standard deviation of 1.3 μm was observed. The other is an approach without a track analysis for high-density irradiation. An internal structure of a crystal oscillator chip, with a scale of approximately 30 μm, was able to be observed after an image analysis.

Neutron imaging with bent perfect crystals. I. Imaging conditions

2001 ◽  
Vol 34 (3) ◽  
pp. 343-357 ◽  
Author(s):  
A. D. Stoica ◽  
M. Popovici ◽  
C. R. Hubbard
Keyword(s):  
High Resolution ◽  
Neutron Scattering ◽  
Spatial Resolution ◽  
Neutron Imaging ◽  
Matrix Formalism ◽  
Neutron Optics ◽  
Bent Crystals ◽  
Time Of Flight Method ◽  
Imaging Conditions ◽  
Lens Optics

Neutron imaging with bent crystals is considered in the linear approximation of neutron optics. A matrix formalism analogous to that of conventional lens optics is developed. Various imaging conditions are discussed in relation to the crystal deformation type and to possible applications in neutron scattering. All focusing conditions known previously are included as particular cases. Arrangements combining high resolution in imaging with high resolution in scattering are examined. The concept of Bragg mirrors as devices for non-dispersive imaging is introduced. The most powerful application appears to be that of Bragg mirrors combined with the time-of-flight method. Imaging with a thick packet of silicon wafers at the spatial resolution of a single thin wafer is demonstrated.

High-resolution scintillator-based neutron imaging detector

2001 ◽  
Author(s):  
Steven M. Ebstein ◽  
Charles C. Shortlidge
Keyword(s):  
High Resolution ◽  
Neutron Imaging ◽  
Imaging Detector

scholarly journals Porosity detection in electron beam-melted Ti-6Al-4V using high-resolution neutron imaging and grating-based interferometry

2017 ◽  
Vol 2 (3) ◽  
pp. 125-132 ◽  
Author(s):  
Adam J. Brooks ◽  
Jinghua Ge ◽  
Michael M. Kirka ◽  
Ryan R. Dehoff ◽  
Hassina Z. Bilheux ◽  
...  
Keyword(s):  
Electron Beam ◽  
High Resolution ◽  
Neutron Imaging ◽  
Porosity Detection

In operando visualization of hydride-graphite composites during cyclic hydrogenation by high-resolution neutron imaging

2015 ◽  
Vol 277 ◽  
pp. 360-369 ◽  
Author(s):  
Carsten Pohlmann ◽  
Kai Herbrig ◽  
Łukasz Gondek ◽  
Nikolay Kardjilov ◽  
André Hilger ◽  
...  
Keyword(s):  
High Resolution ◽  
Neutron Imaging ◽  
In Operando ◽  
Graphite Composites

Time-Resolved Water Measurement in a PEM Fuel Cell Using High-Resolution Neutron Imaging Technique

2010 ◽  
Vol 7 (5) ◽  
Author(s):  
P. Quan ◽  
M.-C. Lai ◽  
D. S. Hussey ◽  
D. L. Jacobson ◽  
A. Kumar ◽  
...  
Keyword(s):  
Fuel Cell ◽  
High Resolution ◽  
Diffusion Layer ◽  
Gas Diffusion Layer ◽  
Gas Diffusion ◽  
Proton Exchange ◽  
Neutron Imaging ◽  
Dew Point ◽  
Membrane Electrode ◽  
Water Measurement

The dynamic process of water transport along the through-plane direction in the membrane electrode assembly of a proton exchange membrane fuel cell was investigated using the high-resolution neutron imaging. Four different membrane/gas diffusion layer or membrane/gas diffusion electrode assemblies were tested by measuring the through-plane water thickness profiles. The results indicate that proper design and assembly of the test fixture are critical for accurate water measurement; the accumulation speed of liquid water inside an assembly varies with time; the ionomer in catalyst layers could facilitate water management in the membrane; the time constants for wetting and drying processes are functions of gas diffusion layer thickness, inlet flow rate, and gas dew point; and the time constant for the wetting process is about 1.4 times longer than the corresponding drying process.

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