X-ray CT Scans - Bats (Set 6)
A collection of x-ray computed tomography scans of Myotis keaysi pilosotibialis specimens from Texas A&Ms Biodiveristy Research and Teaching Collections.
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗
SEARCH · Engineering Papers
Results for “Computed Tomography”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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FuncQEE CT Scans - Set 6
A collection of x-ray computed tomography scans of specimens from the Museum of Southwestern Biology.
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗
X-ray CT Scans - Bats (Set 1)
A collection of x-ray computed tomography scans of specimens from the Museum of Southwestern Biology.
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗
X-ray CT Scans - Bats (Set 2)
A collection of x-ray computed tomography scans of specimens from the Museum of Southwestern Biology.
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗
FuncQEE CT Scans (Set 2)
A collection of x-ray computed tomography scans of specimens from the Museum of Southwestern Biology.
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗
FuncQEE CT Scans (Set 4)
A collection of x-ray computed tomography scans of specimens from the Museum of Southwestern Biology.
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗
FuncQEE CT Scans (Set 5)
A collection of x-ray computed tomography scans of specimens from the Museum of Southwestern Biology.
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗
FuncQEE CT Scans - Set 11
A collection of x-ray computed tomography scans of specimens from the Museum of Southwestern Biology.
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗
TP89 - SIRZ Decomposition Spectral Estimation (V.1.0)
The purpose of this test plan is to generate and evaluate calibrated system spectral response models for a dual-energy x-ray computed tomography (DECT) scanner. These spectral response models, which represent the energy distribution of photons observed by the detector with no test articles in the beam path, are necessary for spectral decomposition reconstruction techniques such as SIRZ, which are used for precise material characterization.
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TP099-CT-800DR Comparison Between SIRZ-2 and Surface Fit Method ($ρ_{e},Ζ_{e}$) Estimation
The primary objective of this test plan is to acquire dual-energy computed tomography (CT) data of 33 well-known specimens using the Leidos Reveal CT-80DR+ baggage scanner housed at LLNL (hereafter referred to as CT-80DR). These data sets will allow us to compare, for each specimen, the accuracy and precision of electron density ($ρ_{e}$) and effective atomic number ($Z_{e}$) estimates obtained from two different algorithmic methods— from TSL’s surface fits and from LLNL’s SIRZ-2 decomposition. A secondary objective is to determine how often it is necessary to acquire CT-80DR spectral response information.
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FuncQEE CT Scans - Set 8
A collection of x-ray computed tomography scans of specimens from the Museum of Southwestern Biology.
59 BASIC BIOLOGICAL SCIENCES↗
X-ray CT Scans - New Mexico Reptiles - Set 1
A collection of x-ray computed tomography scans of specimens from the Museum of Southwestern Biology.
59 BASIC BIOLOGICAL SCIENCES↗
FuncQEE CT Scans - Set 10
A collection of x-ray computed tomography scans of specimens from the Museum of Southwestern Biology.
59 BASIC BIOLOGICAL SCIENCES↗
Transient Deformation in Additively Manufactured 316L Stainless Steel Lattices Characterized with in-situ X-ray Phase Contrast Imaging: The Complete Dataset for Three Geometrical Lattices
Metallic lattice structures are being considered for shock mitigation applications due to their superior mechanical properties, energy absorption capability and lightweight characteristics inherent of the additive manufacturing process. In this study, shock compression experiments coupled to x-ray phase contrast imaging (PCI) were conducted on 316L stainless steel lattices. Meso-scale simulations incorporating the as-built lattice structure characterized by computed tomography were used to simulate PCI radiographs in CTH for direct comparison to experimental data. The methodology presented here offers robust validation for constitutive properties to further our understanding of lattice compaction at application-relevant strain rates.
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X-ray CT Scans—Set 5
This report includes a collection of x-ray computed tomography scans of specimens from the Museum of Southwestern Biology.
59 BASIC BIOLOGICAL SCIENCES↗
X-ray CT Scans - Rodents - Set 3
A collection of x-ray computed tomography scans of specimens from the Museum of Southwestern Biology.
59 BASIC BIOLOGICAL SCIENCES↗
Design Optimization for Printed Melt Wire Arrays Encapsulation
As part of the Nuclear Energy Enabling Technology (NEET) Advanced Sensor and Instrumentation (ASI) Program, Idaho National Laboratory (INL) has recently established in-house capabilities to fabricate and test new advanced-manufactured sensors for measuring peak irradiation temperature within a nuclear test reactor. Although methods of real-time temperature monitoring, such as thermocouples, may be used, the complexity of feedthroughs and attachments to collect real-time measurements greatly increases the cost of the experiment. Instead, passive monitoring techniques may be used for peak- temperature measurement that exploit the melting point of well-characterized materials (standard melt wires) to infer peak reactor temperatures. However, limited available space for instrumentation during experiments introduces an additional challenge. To accommodate this, INL has expanded its temperature- detection instrumentation capabilities to include advanced manufactured (AM) melt wires for peak irradiation temperature measurements. These melt wires can determine peak temperatures while also accommodate space limitations in irradiation experiments. In an effort to improve performance reliability of AM meltwire capabilities, a process was developed and tested to identify the significance of entrapping a high purity inert atmosphere within the packaging of printed melt wire arrays. The materials used in this study were aluminum, zinc, and tin encapsulated in high purity helium within a stainless steel (SS) 316 container. Tin, with a low melting point of approximately 230°C, Zn with a mid-melting point of approximately 420°C, and Al with a high melting point of approximately 660°C. This report describes the design, fabrication process, furnace testing and X-ray Computed Tomography (XCT) evaluation. Results show a successful outcome in creating an inert gas encapsulation and high-resolution evaluation methods.
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗
High Fidelity Tomographic Density Reconstructions [Slides]
Pressed high explosives have small density variations associated with the pressing process, from a few to sub percent depending on the material. Variations at these levels are known to have an impact on HE performance. Currently, a destructive testing method based on physical sectioning followed by immersion density measurements (slice and dice) is utilized. However, this method has poor spatial resolution limited by the the sectioning size, 1-2 cm. If possible, radiographic methods including Computed Tomography (CT) would be preferred, as they are non-destructive and have higher (less than .1 mm) spatial resolution. However, beam hardening, scattered radiation, and detector effects make density reconstructions at this level extremely challenging.
42 ENGINEERING↗