Publications by authors named "A S Tremsin"
A new type of position-sensitive detectors is gaining attention in the neutron community. They are scintillator based detectors that detect the scintillation light on an individual photon basis via an image intensifier and a fast image sensor. Their readout operates in event mode i.
View Article and Find Full Text PDFEnergy-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 of individual isotopes. The reconstruction of the composition is possible due to the unique features (e.
View Article and Find Full Text PDFArticle Synopsis
- Optical imaging has been around for thousands of years, while radiographic imaging and tomography have developed significantly in the last 130 years, starting with the discovery of X-rays by Wilhelm Röntgen.
- Both optical and radiographic imaging share common building blocks such as physics, sources, detectors, methods, and data science, which enhance their capabilities.
- The evolution of these imaging techniques is pushing towards higher dimensions (like 4D) and is driven by technological advancements, aiming for better resolution, increased information yield, and integration of AI and automated data processing.
Article Synopsis
- The NECTAR instrument utilizes thermal and fast neutrons for non-destructive inspection of large, dense objects, offering a unique radiography and tomography approach through scintillators and a camera system.
- Gamma-rays, which are produced alongside neutrons and share a similar directional path, can be considered useful rather than just beam contamination; they can be detected through gamma-sensitive scintillator screens integrated into the existing detection setup.
- This multimodal imaging technique improves depth penetration capabilities compared to traditional X-ray imaging, allowing better analysis of cm-sized objects by leveraging both neutron and gamma-ray data.
The Oak Ridge National Laboratory is planning to build the Second Target Station (STS) at the Spallation Neutron Source (SNS). STS will host a suite of novel instruments that complement the First Target Station's beamline capabilities by offering an increased flux for cold neutrons and a broader wavelength bandwidth. A novel neutron imaging beamline, named the Complex, Unique, and Powerful Imaging Instrument for Dynamics (CUPI2D), is among the first eight instruments that will be commissioned at STS as part of the construction project.
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