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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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Measurements of L-shell X-ray Emission lines of Neonlike Europium on an Electron Beam Ion Trap
We report a measurement of the two X-ray transitions that proceed from the (1s22s22p51∕23d3∕2)J=1 and (1s22s1/22p63p1/2)J =1 upper levels to the (1s22s22p6)J =0 ground level in neonlike Eu53+ (Z = 63), that is, near the previously documented avoided crossing of the two upper levels at Z = 68. The measurement was carried out using the calorimeter spectrometer on the Livermore EBIT-I electron beam ion trap. It affirms the trends set by the neighboring neonlike ions both in terms of the relative intensity of the two lines and in terms of the magnitude of disagreement with theoretical energy level predictions.
Active full-shell grazing-incidence optics
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Shell Buckling Knockdown Factor Project: Test and Analysis of a Large-scale Sandwich Composite Cylinder
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Mechanics of Structure Genome-Based Nonlinear Shell Analysis
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Understanding Atmospheric Absorption Effects on UV Spectra from Sounding Rockets using a Spherical-Shells Model
Our team is working on building and calibrating the FURST sounding rocket, with an expected launch in mid-2023. The goal is to image the most complete and highest resolution UV spectra to date. To do this, preciseradiometric and wavelength calibration techniques have been developed. We describe below our model of O2 atmospheric absorption and couple that with simulated FURST images. With a high-enough SNR, we canestimate our ability to use absorption peaks for calibration, or for back-calculating atmospheric properties. If data is available, this method could be applied to older sounding rocket data to find hidden science.
Understanding Atmospheric Absorption Effects on UV Spectra from Sounding Rockets using a Spherical-Shells Model
Our team is working on building and calibrating the FURST sounding rocket, with an expected launch in mid-2023. The goal is to image the most complete and highest resolution UV spectra to date. To do this, precise radiometric and wavelength calibration techniques have been developed. We describe below our model of O2 atmospheric absorption and couple that with simulated FURST images. With a high-enough SNR, we can estimate our ability to use absorption peaks for calibration, or for back-calculating atmospheric properties. If data is available, this method could be applied to older sounding rocket data to find hidden science.
The Calculation of Diffusion Properties for Open Shell Molecules
- Navier-Stokes requires as input various collision integrals for gases - Diffusion, - Viscosity - Thermal conductivity - Thermal diffusion ... - Levin, Stallcop and Partridge state-of-the-art - Non-Relativistic Born-Oppenheimer Approximation (freeze nuclei first, let them move second) - Solve electron problem: Compute realistic Potential Curves (PC) from first principles, - Solve nuclei problem: Compute scattering properties for each PC using sophisticated semi-classical method - Compute cross sections - Compute appropriate thermal collision integrals
Loft: An Automated Mesh Generator for Stiffened-Shell Aerospace Vehicles
Loft is an automated mesh generation code designed for aerospace vehicle structures. Based on user input, it can generate meshes for wings, noses, tanks, fuselage sections, thrust structures, etc. As the mesh is generated, each element is assigned properties that mark what part of the vehicle it is associated with. This property assignment is an extremely powerful feature making possible detailed analysis tasks such as load application and sizing. Loft can save its meshes in NASTRAN bulk data deck, EDS’ I-DEAS Universal File format, Abaqus input file format, VRML 2.0 (Virtual Reality Modeling Language) and STL (Stereo Lithography) files. The property assignment scheme was designed to make sizing in Collier Research’s HyperSizer easy. Support for other mesh storage formats can be added as needed.
Achieving Large-Scale High-Resolution Full-Shell Replicated X-ray Optics: Budgeting for Sources of Angular Resolution Errors
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Optimizing the Electroforming Process to Enhance the Thickness Uniformity of Full Shell X-Ray Optics
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Using Loft: An Automated Parametric Mesh Generator for Stiffened Shell Aerospace Vehicles
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Optimizing the electroforming process for full shell X-ray optics
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Spectroscopic diagnostics of high-temperature plasma in stellar coronae using Fe xxiv – xxiv K-shell lines with XRISM
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Tidally induced fault motion within Europa's ice shell and implications for subsurface communication development
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Two new nova shells associated with V4362 Sagittarii and DO Aquilae
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Highly Stable Three Lithium Insertion in Thin V 2 O 5 Shells on Vertically Aligned Carbon Nanofiber Arrays for Ultrahigh‐Capacity Lithium Ion Battery Cathodes
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