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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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ITA Workshop Introduction and Operations Overview
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The Los Angeles 100% Renewable Energy Study (LA100): Chapter 1. Introduction
The City of Los Angeles has set ambitious goals to transform its electricity supply, aiming to achieve a 100% renewable energy power system by 2045, along with aggressive electrification targets for buildings and vehicles. To reach these goals, and assess the implications for jobs, electricity rates, the environment, and environmental justice, the Los Angeles City Council passed a series of motions directing the Los Angeles Department of Water and Power (LADWP) to determine the technical feasibility and investment pathways of a 100% renewable energy portfolio standard. The Los Angeles 100% Renewable Energy Study (LA100) is a first-of-its-kind objective, rigorous, and science-based power systems analysis to determine what investments could be made to achieve these goals. The LA100 final report is presented as a collection of 12 chapters and an executive summary, each of which is available as an individual download. This chapter introduces the study.
An Introduction to Radiation Damage in Minerals and Ceramics [Slides]
Radiation effects in minerals and ceramics are quite distinct from effects observed in metals. This is largely due to interactions between radiation and the electronic structure of insulating materials that are unique compared to metallic conductors. Most notably, insulators exhibit property changes when energetic particles lose energy to electrons in the solid, whereas metals are unaffected by electronic energy losses. In addition, displacive radiation damage effects (atoms being knocked off their lattice sites by energetic particles) are much more complex in insulators, due to the complexities of their crystal structures (multiple cation and anion sublattices). In this presentation, we will focus on the atomistic mechanisms responsible for radiation damage in minerals and ceramics, when energetic particles lose energy while penetrating a solid. We will consider several examples, including (i) irradiation induced color center formation in gemstones; (ii) latent defects in alkali halides (relevance to thermoluminescent detectors); (iii) radioactive decay-induced amorphization of natural minerals; and (iv) extended defect formation and phase stability in complex oxides.
The ASC Program at Los Alamos: An introduction [Slides]
Abstract not provided.
Neural network denoising of HED x-ray images, with an introduction to neural networks [Slides]
We created and trained a new neural network denoiser model using estimates of noise in the data. We showed that our denoiser significantly reduces the combined blur and noise on the training and testing set. We demonstrated the efficacy of neural network denoisers for reducing noise on HED x-ray images. Changes to network architecture and improvements to the noise model in training could improve the model.
FleCSI Developments: Introduction & Applications [Slides]
FleCSI is a task-based programming system for developing multiphysics application codes.
CrossLink Mesh Generation Software: An Introduction [Slides]
Abstract not provided.
Introduction to Fentanyl: What, Why, When, Where, How
This primer is designed to distill the subject of fentanyl and its analogs into simple terms. It is not an assessment. Its audience is the public, i.e., nonexperts that are curious about the topic. Therefore, the descriptions are broad rather than deep. As substantial information is available on fentanyl, our aim is to distill the information into a format that answers basic questions: What is fentanyl? Why is it dangerous? When is fentanyl most deadly? Where does it act in the body? How can its effect be mitigated? References and appendices are provided as supporting scientific information, and footnotes provide technical definitions.
Introduction to Finite Element Analysis: Abaqus Tutorial [Slides]
Abaqus is a suite of powerful engineering simulation programs, based on the finite element method, that can solve a variety of problems, ranging from simple to complex, including the fields of: Structural mechanics, Structural dynamics, Thermodynamics, Heat transfer, and more
Deterministic Transport: An Introduction [Slides]
In this lecture, we cover deterministic particle transport. We focus on neutral particles (neutrons, gamma-rays, and thermal photons). Our goal is to predictively and accurately model how free particles interact with their environments and properties of systems involving those particles.
Introduction to quench detection
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Introduction to Gamma-Ray Detection [Slides]
Abstract not provided.
Volume 1: Introduction to the HFIR Futures - Enhanced Capabilities Series
Since it began operating at full power in 1966, the High Flux Isotope Reactor (HFIR) has contributed unparalleled neutron science capabilities to research on neutron scattering, isotope production, materials and fuels irradiation, and neutron activation analysis. HFIR is a high-performance, multi-mission research reactor operated on behalf of the US Department of Energy (DOE) at the Oak Ridge National Laboratory (ORNL). In 2020, a DOE Basic Energy Sciences Advisory Committee Subcommittee (BESAC) published a report recommending that DOE make significant investments in HFIR to enable continued operations beyond the year 2100 while also enabling new research and isotope production capabilities. ORNL organized an initiative to investigate how to specifically address the report’s key recommendations, including enabling long-term operation, brainstorming future scientific research needs, and outlining the infrastructure required to realize these future research capabilities. A multivolume series of reports has been developed to document the nonscattering enhancements. This volume, the introductory report, provides an overview of HFIR and the initiative.