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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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At least 19 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS1990

Boeing infrared sensor (BIRS) calibration facility

The Boeing Infrared Sensor (BIRS) Calibration Facility represents a major capital investment in optical and infrared technology. The facility was designed and built for the calibration and testing of the new generation large aperture long wave infrared (LWIR) sensors, seekers, and related technologies. Capability exists to perform both radiometric and goniometric calibrations of large infrared sensors under simulated environmental operating conditions. The system is presently configured for endoatmospheric calibrations with a uniform background field which can be set to simulate the expected mission background levels. During calibration, the sensor under test is also exposed to expected mission temperatures and pressures within the test chamber. Capability exists to convert the facility for exoatmospheric testing. The configuration of the system is described along with hardware elements and changes made to date are addressed.

Hazen, John D.↗
DOE OSTI2020

Materials Data on Ba(BIr)2 by Materials Project

Ba(IrB)2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Ba is bonded in a 8-coordinate geometry to eight equivalent Ir and eight equivalent B atoms. All Ba–Ir bond lengths are 3.50 Å. All Ba–B bond lengths are 3.50 Å. Ir is bonded in a 4-coordinate geometry to four equivalent Ba and four equivalent B atoms. All Ir–B bond lengths are 2.13 Å. B is bonded in a 4-coordinate geometry to four equivalent Ba and four equivalent Ir atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ca(BIr)2 by Materials Project

Ca(IrB)2 is alpha Pu-derived structured and crystallizes in the orthorhombic Fddd space group. The structure is three-dimensional. Ca is bonded in a 10-coordinate geometry to eight equivalent Ir and six equivalent B atoms. There are four shorter (3.05 Å) and four longer (3.29 Å) Ca–Ir bond lengths. There are two shorter (3.00 Å) and four longer (3.15 Å) Ca–B bond lengths. Ir is bonded in a 4-coordinate geometry to four equivalent Ca and four equivalent B atoms. There are two shorter (2.09 Å) and two longer (2.16 Å) Ir–B bond lengths. B is bonded in a 4-coordinate geometry to three equivalent Ca and four equivalent Ir atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Y(BIr)2 by Materials Project

Y(IrB)2 is alpha Pu-derived structured and crystallizes in the orthorhombic Fddd space group. The structure is three-dimensional. Y is bonded in a 2-coordinate geometry to eight equivalent Ir and six equivalent B atoms. There are four shorter (3.05 Å) and four longer (3.25 Å) Y–Ir bond lengths. There are two shorter (2.97 Å) and four longer (3.15 Å) Y–B bond lengths. Ir is bonded in a 4-coordinate geometry to four equivalent Y and four equivalent B atoms. There are two shorter (2.08 Å) and two longer (2.19 Å) Ir–B bond lengths. B is bonded in a 4-coordinate geometry to three equivalent Y and four equivalent Ir atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Eu(BIr)4 by Materials Project

Eu(IrB)4 is alpha Pu-derived structured and crystallizes in the tetragonal P4_2/n space group. The structure is three-dimensional. Eu is bonded in a 4-coordinate geometry to four equivalent B atoms. All Eu–B bond lengths are 2.92 Å. Ir is bonded in a 4-coordinate geometry to four equivalent B atoms. There are a spread of Ir–B bond distances ranging from 2.11–2.17 Å. B is bonded in a 6-coordinate geometry to one Eu, four equivalent Ir, and one B atom. The B–B bond length is 1.87 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Eu(BIr)2 by Materials Project

Eu(IrB)2 is alpha Pu-derived structured and crystallizes in the orthorhombic Fddd space group. The structure is three-dimensional. Eu is bonded in a 10-coordinate geometry to eight equivalent Ir and six equivalent B atoms. There are four shorter (3.08 Å) and four longer (3.34 Å) Eu–Ir bond lengths. There are two shorter (3.04 Å) and four longer (3.16 Å) Eu–B bond lengths. Ir is bonded in a 4-coordinate geometry to four equivalent Eu and four equivalent B atoms. There are two shorter (2.10 Å) and two longer (2.17 Å) Ir–B bond lengths. B is bonded in a 4-coordinate geometry to three equivalent Eu and four equivalent Ir atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba7(BIr)12 by Materials Project

Ba7(IrB)12 is alpha Pu-derived structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. there are two inequivalent Ba sites. In the first Ba site, Ba is bonded in a 3-coordinate geometry to one Ir and two equivalent B atoms. The Ba–Ir bond length is 3.14 Å. Both Ba–B bond lengths are 3.15 Å. In the second Ba site, Ba is bonded in a distorted cuboctahedral geometry to six equivalent Ir and six equivalent B atoms. All Ba–Ir bond lengths are 3.58 Å. All Ba–B bond lengths are 3.51 Å. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded in a 4-coordinate geometry to four B atoms. There are two shorter (2.16 Å) and two longer (2.18 Å) Ir–B bond lengths. In the second Ir site, Ir is bonded in a 5-coordinate geometry to two Ba and four B atoms. There are two shorter (2.13 Å) and two longer (2.17 Å) Ir–B bond lengths. There are two inequivalent B sites. In the first B site, B is bonded in a 4-coordinate geometry to three Ba and four Ir atoms. In the second B site, B is bonded in a 5-coordinate geometry to four Ir and one B atom. The B–B bond length is 1.83 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Zn(BIr)2 by Materials Project

Zn(IrB)2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Ir is bonded in a 8-coordinate geometry to four equivalent Zn and four equivalent B atoms. All Ir–Zn bond lengths are 2.67 Å. All Ir–B bond lengths are 2.16 Å. Zn is bonded in a body-centered cubic geometry to eight equivalent Ir atoms. B is bonded in a 8-coordinate geometry to four equivalent Ir and four equivalent B atoms. All B–B bond lengths are 2.12 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sr(BIr)2 by Materials Project

Sr(IrB)2 is alpha Pu-derived structured and crystallizes in the orthorhombic Fddd space group. The structure is three-dimensional. Sr is bonded in a 10-coordinate geometry to eight equivalent Ir and six equivalent B atoms. There are four shorter (3.10 Å) and four longer (3.36 Å) Sr–Ir bond lengths. There are two shorter (3.09 Å) and four longer (3.18 Å) Sr–B bond lengths. Ir is bonded in a 4-coordinate geometry to four equivalent Sr and four equivalent B atoms. There are two shorter (2.12 Å) and two longer (2.17 Å) Ir–B bond lengths. B is bonded in a 4-coordinate geometry to three equivalent Sr and four equivalent Ir atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ce(BIr)2 by Materials Project

CeIr2B2 is alpha Pu-derived structured and crystallizes in the orthorhombic Fddd space group. The structure is three-dimensional. Ce is bonded in a 10-coordinate geometry to eight equivalent Ir and six equivalent B atoms. There are four shorter (3.07 Å) and four longer (3.32 Å) Ce–Ir bond lengths. There are two shorter (3.00 Å) and four longer (3.13 Å) Ce–B bond lengths. Ir is bonded in a 4-coordinate geometry to four equivalent Ce and four equivalent B atoms. There are two shorter (2.09 Å) and two longer (2.19 Å) Ir–B bond lengths. B is bonded in a 4-coordinate geometry to three equivalent Ce and four equivalent Ir atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Nd(BIr)4 by Materials Project

Nd(IrB)4 is alpha Pu-derived structured and crystallizes in the tetragonal P4_2/n space group. The structure is three-dimensional. Nd is bonded in a 4-coordinate geometry to four equivalent B atoms. All Nd–B bond lengths are 2.93 Å. Ir is bonded in a 4-coordinate geometry to four equivalent B atoms. There are a spread of Ir–B bond distances ranging from 2.11–2.17 Å. B is bonded in a 6-coordinate geometry to one Nd, four equivalent Ir, and one B atom. The B–B bond length is 1.86 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on La(BIr)4 by Materials Project

La(IrB)4 is alpha Pu-derived structured and crystallizes in the tetragonal P4_2/n space group. The structure is three-dimensional. La is bonded in a 4-coordinate geometry to eight equivalent Ir and twelve equivalent B atoms. There are four shorter (3.19 Å) and four longer (3.29 Å) La–Ir bond lengths. There are a spread of La–B bond distances ranging from 2.94–3.47 Å. Ir is bonded in a 4-coordinate geometry to two equivalent La and four equivalent B atoms. There are a spread of Ir–B bond distances ranging from 2.11–2.17 Å. B is bonded in a 6-coordinate geometry to three equivalent La, four equivalent Ir, and one B atom. The B–B bond length is 1.88 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tb(BIr)4 by Materials Project

Tb(IrB)4 is alpha Pu-derived structured and crystallizes in the tetragonal P4_2/n space group. The structure is three-dimensional. Tb is bonded in a 4-coordinate geometry to four equivalent B atoms. All Tb–B bond lengths are 2.90 Å. Ir is bonded in a 4-coordinate geometry to four equivalent B atoms. There are a spread of Ir–B bond distances ranging from 2.10–2.18 Å. B is bonded in a 6-coordinate geometry to one Tb, four equivalent Ir, and one B atom. The B–B bond length is 1.84 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Y(BIr)4 by Materials Project

Y(IrB)4 is alpha Pu-derived structured and crystallizes in the tetragonal P4_2/n space group. The structure is three-dimensional. Y is bonded in a 4-coordinate geometry to four equivalent B atoms. All Y–B bond lengths are 2.90 Å. Ir is bonded in a 4-coordinate geometry to four equivalent B atoms. There are a spread of Ir–B bond distances ranging from 2.10–2.18 Å. B is bonded in a 6-coordinate geometry to one Y, four equivalent Ir, and one B atom. The B–B bond length is 1.84 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on BIr by Materials Project

IrB is Tungsten Carbide structured and crystallizes in the hexagonal P-6m2 space group. The structure is three-dimensional. Ir3+ is bonded to six equivalent B3- atoms to form a mixture of distorted face, edge, and corner-sharing IrB6 pentagonal pyramids. All Ir–B bond lengths are 2.22 Å. B3- is bonded to six equivalent Ir3+ atoms to form a mixture of distorted face, edge, and corner-sharing BIr6 pentagonal pyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2021

Exploring the design space of PV-plus-battery system configurations under evolving grid conditions

In this study, we explore how the energy and capacity values of coupled systems comprising solar photovoltaic arrays and battery storage (PV-plus-battery systems) could evolve over time based on the evolution of the bulk power system. Using a price-taker model with simulated hourly energy and capacity prices projected from the present to 2050, we simulate the revenue-maximizing dispatch of a range of DC-coupled PV-plus-battery configurations in three locations in the United States. These configurations are defined by the inverter loading ratio (ILR, the ratio of the PV array capacity to the inverter capacity, which we vary from 1.4 to 2.6) and the battery-inverter ratio (BIR, the ratio of the battery power capacity to the inverter capacity, which we vary from 0.25 to 1.0). Based on each configuration's total value, we estimate the breakeven costs needed to justify each incremental increase in ILR (holding BIR constant) or BIR (holding ILR constant). We find that, in a future with low-cost renewable energy technologies, PV-plus-battery system ILRs can be economically increased to around 2.0-2.4 at a BIR of 1.0, depending on solar resource. Our results indicate that a likely evolution of PV-plus-battery system design will be increasingly greater battery power capacity to mitigate the declining PV capacity value, which will, in turn, enable increasingly higher ILRs to further increase energy value. The extent to which PV-plus-systems will be deployed with increasingly higher ILRs depends primarily on whether PV cost declines outpace declining value and increasing curtailment over time.

14 SOLAR ENERGY↗
DOE OSTI2025

Accounting for electron-beam-induced warping of molecular nanocrystals in MicroED structure determination

High-energy electrons induce sample damage and motion at the nanoscale to fundamentally limit the determination of molecular structures by electron diffraction. Using a fast event-based electron counting (EBEC) detector, we characterize beam-induced, dynamic, molecular crystal lattice reorientations (BIRs). These changes are sufficiently large to bring reciprocal lattice points entirely in or out of intersection with the sphere of reflection, occur as early events in the decay of diffracted signal due to radiolytic damage, and coincide with beam-induced migrations of crystal bend contours within the same fluence regime and at the same illuminated location on a crystal. These effects are observed in crystals of biotin, a series of amino acid metal chelates, and a six-residue peptide, suggesting that incident electrons inevitably warp molecular lattices. The precise orientation changes experienced by a given microcrystal are unpredictable but are measurable by indexing individual diffraction patterns during beam-induced decay. Reorientations can often tilt a crystal lattice several degrees away from its initial position before irradiation, and for an especially beam-sensitive Zn(II)-methionine chelate, are associated with dramatic crystal quakes prior to 1 e − Å −2 electron beam fluence accumulates. Since BIR coincides with the early stages of beam-induced damage, it echoes the beam-induced motion observed in single-particle cryoEM. As with motion correction for cryoEM imaging experiments, accounting for BIR-induced errors during data processing could improve the accuracy of MicroED data.

Vlahakis, Niko (ORCID:0000000250920265)↗
DOE OSTI2022

Structure of the pre-mRNA leakage 39-kDa protein reveals a single domain of integrated zf-C3HC and Rsm1 modules

In Saccharomyces cerevisiae, the pre-mRNA leakage 39-kDa protein (ScPml39) was reported to retain unspliced pre-mRNA prior to export through nuclear pore complexes (NPCs). Pml39 homologs outside the Saccharomycetaceae family are currently unknown, and mechanistic insight into Pml39 function is lacking. Here we determined the crystal structure of ScPml39 at 2.5 Å resolution to facilitate the discovery of orthologs beyond Saccharomycetaceae, e.g. in Schizosaccharomyces pombe or human. The crystal structure revealed integrated zf-C3HC and Rsm1 modules, which are tightly associated through a hydrophobic interface to form a single domain. Both zf-C3HC and Rsm1 modules belong to the Zn-containing BIR (Baculovirus IAP repeat)-like super family, with key residues of the canonical BIR domain being conserved. Features unique to the Pml39 modules refer to the spacing between the Zn-coordinating residues, giving rise to a substantially tilted helix αC in the zf-C3HC and Rsm1 modules, and an extra helix αAB' in the Rsm1 module. Conservation of key residues responsible for its distinct features identifies S. pombe Rsm1 and Homo sapiens NIPA/ZC3HC1 as structural orthologs of ScPml39. Based on the recent functional characterization of NIPA/ZC3HC1 as a scaffold protein that stabilizes the nuclear basket of the NPC, our data suggest an analogous function of ScPml39 in S. cerevisiae.

59 BASIC BIOLOGICAL SCIENCES↗