D. E. Archer
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View article: Full spectrum modeling of in situ gamma-ray detector measurements with a focus on precipitation-induced transients
Full spectrum modeling of in situ gamma-ray detector measurements with a focus on precipitation-induced transients Open
Gamma-ray detectors that are deployed outdoors experience increased event rates during precipitation due to the attendant increase in Rn-222 progeny at ground level. The increased radiation due to these decay products (Pb-214 and Bi-214) h…
View article: Full Spectrum Modeling of In Situ Gamma-ray Detector Measurements with a Focus on Precipitation-Induced Transients
Full Spectrum Modeling of In Situ Gamma-ray Detector Measurements with a Focus on Precipitation-Induced Transients Open
Gamma-ray detectors that are deployed outdoors experience increased event rates during precipitation due to the attendant increase in Rn-222 progeny at ground level. The increased radiation due to these decay products (Pb-214 and Bi-214) h…
View article: Assessing the effect of arousal on performance in a virtual reality narrative scenario using biological signals
Assessing the effect of arousal on performance in a virtual reality narrative scenario using biological signals Open
When analysing a user’s experience of virtual reality (VR), factors such as their level of technical familiarity, proficiency with immersive technology and concomitant degree of physiological arousal inside a VR experience can have a signi…
View article: Threat Sources for Creating Synthetic Urban Search Data
Threat Sources for Creating Synthetic Urban Search Data Open
Equivalent point source energy emission distributions were computed for various threat sources for use in simulating the detector responses for urban search scenarios. The sources include standard isotopic sources used in detector testing,…
View article: SNM Radiation Signature Classification Using Different Semi-Supervised Machine Learning Models
SNM Radiation Signature Classification Using Different Semi-Supervised Machine Learning Models Open
The timely detection of special nuclear material (SNM) transfers between nuclear facilities is an important monitoring objective in nuclear nonproliferation. Persistent monitoring enabled by successful detection and characterization of rad…
View article: Adaptable radiation monitoring system and method
Adaptable radiation monitoring system and method Open
A portable radioactive-material detection system capable of detecting radioactive sources moving at high speeds. The system has at least one radiation detector capable of detecting gamma-radiation and coupled to an MCA capable of collectin…
View article: List mode multichannel analyzer
List mode multichannel analyzer Open
A digital list mode multichannel analyzer (MCA) built around a programmable FPGA device for onboard data analysis and on-the-fly modification of system detection/operating parameters, and capable of collecting and processing data in very s…
View article: A multi-modal scanning system to digitize CBRNE emergency response scenes
A multi-modal scanning system to digitize CBRNE emergency response scenes Open
A handheld system developed to digitize a contextual understanding of the scene at a chemical, biological, radiological, nuclear and/or explosives (CBRNE) events is described. The system uses LiDAR and cameras to create a colorized 3D mode…
View article: Measurement Plan for Uncertainty Contributions to <sup>252</sup>Cf Waste Measurements
Measurement Plan for Uncertainty Contributions to <sup>252</sup>Cf Waste Measurements Open
This measurement plan establishes the methodology for performing and analyzing mock-up measurements of Building 7930 Cell G Cf waste generated from 252Cf product preparation to better determine the measurement uncertainty contributors. Und…
View article: Cell G 7606A Mockup Measurement Analysis Methods and Results
Cell G 7606A Mockup Measurement Analysis Methods and Results Open
The production of research isotopes at the Radiochemical Engineering Development Center (REDC) invariably leads to the accumulation of radioactive waste. Storage of this waste onsite at ORNL serves as an interim solution prior to shipment …
View article: Training data selection for event classification in a highly variable environment
Training data selection for event classification in a highly variable environment Open
A problem of interest for nuclear nonproliferation is monitoring activities at nuclear facilities, where proliferation events may only take place a few times and often under variable conditions. Machine learning has revolutionized data ana…
View article: Monte Carlo Simulation of Background and Source Measurements with CSG and CAD Geometries
Monte Carlo Simulation of Background and Source Measurements with CSG and CAD Geometries Open
Detecting radioactive sources in an urban environment is difficult due to the large magnitude and variability of the background radiation. To support the search mission of the National Nuclear Security Administration, a project was underta…
View article: Gamma Attribute Measurements - Pu300, Pu600, Pu900
Gamma Attribute Measurements - Pu300, Pu600, Pu900 Open
Gamma rays are ideal probes for the determination of information about the special nuclear material that is in the transparency regime. Gamma rays are good probes because they interact relatively weakly with the containers that surround th…
View article: Pu300: A Tool for Measurement of Plutonium Age for Arms Control Transparency via Gamma-Ray Spectroscopy
Pu300: A Tool for Measurement of Plutonium Age for Arms Control Transparency via Gamma-Ray Spectroscopy Open
Pu300 has particular application in the Arms Control Transparency arena, where very sensitive material is often the subject of tests and measurements. In Arms Control Transparency projects, we attempt to measure attributes of material remo…
View article: Results of Gamma-Ray Measurements from a Recent Demonstration for Russian Technical Experts
Results of Gamma-Ray Measurements from a Recent Demonstration for Russian Technical Experts Open
In August 2001, a group of U.S. technical experts demonstrated an Attribute Measurement System with an Information Barrier (AMSIB) for a delegation of Russian technical experts. The purpose of the demonstration was to show that attributes …
View article: Significant anthropogenic supporter of an earth-wide temperature boost.
Significant anthropogenic supporter of an earth-wide temperature boost. Open
Air contaminations, for example, tropospheric ozone and dark carbon (sediment) likewise add to
the nursery impact. Dark carbon is believed to be the second or third most significant anthropogenic
supporter of an unnatural weather c…
View article: The production of low-molecular weight polyisobutene.
The production of low-molecular weight polyisobutene. Open
A model for a cycle that can, on a fundamental level, be improved by the utilization of an impetus
is the blend of poly (2-methyl-propene)s (polyisobutenes), which are significant for various
modern applications. Every year a few 1…
View article: Predicting organic matter degradation
Predicting organic matter degradation Open
Upflow Anaerobic Filter (UAF) reactor used to treat slaughterhouse wastewater was done with
the differing working conditions for Hydraulic Retention Time (HRT) and temperature. With
the best natural matter expulsion effectiveness…
View article: Data for training and testing radiation detection algorithms in an urban environment
Data for training and testing radiation detection algorithms in an urban environment Open
The detection, identification, and localization of illicit nuclear materials in urban environments is of utmost importance for national security. Most often, the process of performing these operations consists of a team of trained individu…
View article: Generation of Synthetic Data for a Radiation Detection Algorithm Competition
Generation of Synthetic Data for a Radiation Detection Algorithm Competition Open
This paper details the generation of synthetic radiation data using large-scale Monte Carlo transport models to evaluate radiation search detection algorithms. Modular 3-D Monte Carlo models spanning multiple city blocks were constructed, …
View article: Data for Training and Testing Radiation Detection Algorithms in an Urban Environment
Data for Training and Testing Radiation Detection Algorithms in an Urban Environment Open
The US government routinely performs radiological response deployments to search for the presence of illicit nuclear materials (e.g., highly enriched uranium and weapons-grade plutonium) in a specified area. The deployments can be intellig…