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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 253 records · Page 14
All sourcesNASA NTRSDOE OSTI
NASA NTRS1971

Delta-85 Orbiting Solar Observatory-H (OSO-H) Operations summary

The objectives of the Orbiting Solar Observatory (OSO-H) are discussed. Subjects considered are the: (1) mission objectives, (2) mission plan, (3) post launch operations, (4) communications, and (5) test operations. Illustrations of the satellite configuration and the Delta 85 launch vehicle are included.

Source record↗
NASA NTRS1972

Delta-90 Interplanetary Monitoring Platform-H (IMP-H)

The operations summary for the IMP-H spacecraft is presented. The subjects discussed are: (1) mission objective, (2) description of launch vehicle and spacecraft, (3) mission plan, (4) flight plan, and (5) post launch operations. Details of the mission are presented in drawings and tables of data.

Source record↗
NASA NTRS1972

Delta-90 Interplanetary Monitoring Platform-H (IMP-H) flash flight report

The Delta-90 launch vehicle and the IMP-H spacecraft were successfully launched from Pad B, Complex 17, Cape Kennedy Air Force Station, Florida, at 2120:00.559 EDT on September 22, 1972. The countdown proceeded smoothly to liftoff with no major difficulties or unscheduled holds. The Delta-90/IMP-H were launched on a pad azimuth of 115 degrees, the vehicle ten rolled to 95 degrees from the north placing the spacecraft in a highly elliptical transfer orbit. Firing the spacecraft kickmotor at 1136 EDT, September 25, 1972, injected the spacecraft into its final desirable near-circular orbit approximately half way between the planet earth and its moon. Vehicle performance of all stages appeared nominal with all sequenced events occurring at the expected times. Data acquisition from all range stations was very good. Damage to the launch pad caused by liftoff was nominal.

Source record↗
NASA NTRS1986

Utilization of potatoes for life support systems. II - The effects of temperature under 24-h and 12-h photoperiods

The effects of temperature and the photoperiod length on the growth and tuberization of Norland potatoes were investigated for two photoperiods, 12-h and 24-hr at 400 micromol/sq m per sec PPF, and at temperatures of 12, 16, 20, 24, and 28 C. It was found that stem length increased with increasing temperature under both photoperiods. The highest tuber yield was obtained at 16 C under the 24-hr photoperiod and at 20 C under the 12-hr photoperiod (i.e., increasing the photoperiod from 12 to 24 hrs effectively decreases the optimal temperature for tuber formation). Little or no tuber formation occurred at 28 C under either photoperiod.

Wheeler, Raymond M.↗
NASA NTRS1994

Soft X-ray and H I surveys of the low N(sub H) region in Ursa Major

A region of almost 300 deg squared in Ursa Major around the direction of the lowest neutral hydrogen column density in the sky has been surveyed in the 1/4 keV X-ray band (approximately 0.12 to 0.284 keV at 10% of the peak response) using the ROSAT position sensitive proportional counter (PSPC) and has been fully mapped in the 21 cm line of neutral hydrogen with an angular resolution of 21' or better. We present maps of these two data sets and an analysis of the spatial correlation between them. Over the entire field, the 1/4 keV band X-ray count rate shows a strong negative correlation with the column density of Galactic neutral hydrogen. We discuss the local, extragalactic, and halo contributions to the observed diffuse X-ray intensity and derive an upper limit to the Galactic X-ray emission originating beyond this H I distribution that is more than a factor of 7 smaller than the inferred flux beyond the Draco nebula, an apparent halo object located approximately 41 degs away. This implies that while there may be significant amounts of hot gas in the Galactic halo, its properties must vary strongly across the sky.

Snowden, S. L.↗
NASA NTRS1969

H-H interaction potentials.

Direct Coulomb interaction matrix elements between hydrogen atoms in ground states calculated, presenting interaction potential

Flannery, M. R.↗
DOE OSTI2020

Imaging the Phase Evolution of the Li-N-H Hydrogen Storage System

Complex metal hydrides provide high-density hydrogen storage, which is essential for vehicular applications. However, the utility of these materials has been limited by thermodynamic and kinetic barriers present during the dehydrogenation and rehydrogenation processes as new phases form inside parent phases. Better understanding of the mixed-phase mesostructures and their interfaces may assist in improving cyclability. In this work, the evolution of the phases during hydrogenation of lithium nitride and dehydrogenation of lithium amide with lithium hydride are probed with scanning-transmission X-ray microscopy at the nitrogen K edge. With this technique, intriguing core-shell structures were observed in particles of both partially hydrogenated Li 3 N and partially dehydrogenated LiNH 2 + 2 LiH. The potential contributions of both internal hydrogen mobility and interfacial energies on the generation of these structures are discussed.

08 HYDROGEN↗
DOE OSTI2025

Synthesis of [(3,4,5‐F 3 C 6 H 2 )(4‐ n BuC 6 H 4 ) 2 C][HCB 11 Cl 11 ]: A Much More Soluble Version of the Trityl Cation with Slightly Higher Lewis Acidity

A new triarylmethyl cation (*Tr + ), designed to closely mimic Ph 3 C + in reactivity, has been prepared as a [HCB 11 Cl 11 ] − salt. *Tr + very slightly exceeds the Lewis acidity of Ph 3 C + in chloride and hydride transfer reactions, but possesses two orders of magnitude higher solubility in organic solvents of low polarity.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
DOE OSTI2022

NNLO QCD corrections to weak boson fusion Higgs boson production in the $H → b \overline{b}$ and $\textit{H → WW* →}$ 4$\textit{l}$ decay channels

We compute the next-to-next-to-leading order QCD corrections to Higgs boson production in weak boson fusion followed by its decay to a $b\bar{b}$ pair or to a pair of leptonically-decaying $\textit{W}$ bosons. Our calculation allows us to compute realistic fiducial cross sections and assess the impact of fiducial cuts applied to the Higgs boson decay products on the magnitude of QCD radiative corrections in weak boson fusion.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗