Alexander Wolfertz

High Temporal and Spatial Resolution X-Ray and Gamma-Ray Imaging using an Event-Mode Scintillator-Based Detector

Alexander Wolfertz, Ondřej Zapadlík, Alex Gustschin, Dr Adrian Losko et autres

LumaCam detectors are a novel type of event-mode imaging detectors based on scintillator screens that have been developed recently for neutron imaging applications. They operate in an event-mode in which individual interactions of the incoming particles with the scintillator screen are reconstructed …

3D Local Measurement of the Magnetic Field Strength Inside Martian Meteorite NWA 7034 by Polarimetric Neutron Imaging

Cédric Holme Qvistgaard, Estrid Buhl Naver, Alexander Wolfertz, Vahid Karimi et autres

Abstract We present a new method for paleomagnetic investigations, polarized neutron imaging, a non‐destructive magnetic imaging technique benefiting from the high penetration depth and spin of the neutron allowing spatial characterization of the magnetic field within a sample. We showcase the general …

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Epithermal Neutron ToF Imaging Using the LumaCam Event-Mode Detector at INES

Alexander Wolfertz, Dr Giulia Marcucci, Dr Adrian Losko, Dr Antonella Scherillo

LumaCam detectors are a novel type of neutron imaging detector, which combine high spatial and temporal resolution. This makes them suitable for epithermal ToF imaging of samples with small features. First tests have already been conducted at the EMMA test beamline using …

Epithermal Neutron ToF Imaging Using the LumaCam Event-Mode Detector at INES

Alexander Wolfertz, Dr Giulia Marcucci, Dr Adrian Losko, Dr Antonella Scherillo

LumaCam detectors are a novel type of neutron imaging detector, which combine high spatial and temporal resolution. This makes them suitable for epithermal ToF imaging of samples with small features. First tests have already been conducted at the EMMA test beamline using …

Unveiling the Local Effects of PTL Passivation in PEM Electrolyzers through Gas and Current Mapping Using Operando Neutron Radiography and Polarized Neutron Imaging

Vahid Karimi, Cédric Holme Qvistgaard, Søren Schmidt, Alexander Wolfertz et autres

Anodic Ti-based porous transport layers (PTLs) are paramount for advancing high-efficiency proton exchange membrane water electrolyzers (PEMWEs). One of the major challenges with the development of PEMWE is the PTL/catalyst layer interface passivation, which is commonly alleviated by coating precious metals such …

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Advances in detection for neutron reflectometry with time-resolved imaging detectors

A. Khaplanov, John Francis Ankner, T. Hirsh, Adrian Simon Losko et autres

Thermal neutron detection in neutron scattering science is a challenging endeavour due to a limited number of technologies which are sensitive to these weakly interacting particles. While many improvements to conventional detectors are underway at various facilities, there is a great opportunity …

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Large field-of-view event-mode camera for high-precision epithermal neutron resonance imaging

T. Hirsh, Alexander Long, Adrian Simon Losko, T. Jaeger et autres

A large-area event-mode camera system coupled with a [Formula: see text]LiF-ZnS:Ag scintillator is applied for neutron resonance imaging (NRI) on the energy-resolved neutron imaging (ERNI) flight path, also known as Flight Path 5 (FP5), at the Los Alamos Neutron Science Center (LANSCE). …

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Energy-resolved neutron imaging and diffraction including grain orientation mapping using event camera technology

T. Hirsh, Andrew F. T. Leong, Adrian Simon Losko, Alexander Wolfertz et autres

Time-of-flight neutron diffraction and energy-resolved imaging each provide unique perspectives into material properties. Neutron diffraction is useful for assessing microstructural parameters such as phase composition, texture, and dislocation densities, though it typically provides averaged data over the sampled volume. Energy-resolved imaging, on …

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Characterization of a mock up nuclear waste package using energy resolved MeV neutron analysis

Tim T. Jäger, T. Hirsh, Stefan Scheuren, Alexander Long et autres

Reliable radiographic methods for characterizing nuclear waste packages non-destructively (without the need to open containers) have the potential to significantly contribute to safe handling and future disposal options, particularly for legacy waste of unknown content. Due to required shielding of waste containers …

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Exploring spatial resolution enhancements on IMAT for steel corrosion studies

Vicky Ullas Mirashi, Winfried A. Kockelmann, Nikil Kapur, Anna Fedrigo et autres

Neutron imaging offers benefits over X-rays for steel corrosion studies including deep penetration and high sensitivity to some light elements such as hydrogen. However, the resolution is frequently at or below the thickness of the corroded layer. This work demonstrates two approaches …

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Frontiers in Neutron Radiography: Neutron particle imaging and detection with optical based Timepix Sensors

Alexander Long, Adrian Simon Losko, T. Hirsh, Alexander Wolfertz et autres

This work presents an optical-based Timepix sensor system for neutron imaging, combining event-mode data acquisition with unparalleled temporal and spatial precision. Its modular design enables diverse applications, advancing neutron radiography across materials science, nuclear engineering, and industrial research.

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Energy-resolved fast-neutron radiography using an event-mode neutron imaging detector

Alexander Wolfertz, Adrian Simon Losko, Alexander Long, Sophia Brodish et autres

Energy-resolved fast-neutron radiography is a powerful non-destructive technique that can be used to remotely measure the quantity and distribution of elements and isotopes in a sample. This is done by comparing the energy-dependent neutron transmission of a sample with the known cross-sections …

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