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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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LK39F1 S/N U-1 infrared detector
A multilayered (Hg,Cd)Te detector is described with three infrared bands. Nominal cut-off wavelengths for each band are as follows: (1) Channel 1 - 3 microns, (2) Channel 2 - 6 microns, and (3) Channel 3 - 11 microns. The multilayered detector is mounted in a Honeywell LK39 glass dewar. Accompanying the detector/dewar assembly is a three-channel preamplifier package capable of switching each detector to the single channel input of the HRB Singer Reconfax 4 Mark 4 Infrared Scanner.
Limits on the soft X-ray and extreme ultraviolet flux from RX Andromedae and U Geminorum
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U-Th-Pb systematics on lunar rocks and inferences about lunar evolution and the age of the moon
The investigation reported continues a study conducted by Tera et al. (1974). An attempt is made to summarize all of the data currently available in the literature on terra materials and to discuss the implications of the upper intersection with the concordia curve. Data on total rocks and some plagioclase separates are presented in a graph. The data appear to give further support to a model of a terminal lunar cataclysm associated with intense global bombardment at about 3.9 aeons.
Observations of Jovian accelerated particles both inside and outside the Jovian magnetosphere - Results from the Goddard-U. of New Hampshire experiment on Pioneer 10
This paper discusses measurements of the energetic-particle population inside Jupiter's magnetosphere as well as observations of energetic particles in interplanetary space that have escaped from that magnetosphere. The discussion is based on Pioneer 10 data obtained when the spacecraft was outside the bow shock but within about 1 AU of the planet and on electron data obtained near earth by various IMP spacecraft. Pioneer 10 particle measurements in the Jovian magnetosphere are reviewed, the differential proton and electron energy spectra are described, and it is suggested that very little particle acceleration occurs in the outer magnetosphere. Additional data are examined in regard to Jovian alpha particles, proton and electron angular distributions, protons in the inner magnetosphere, effects of Io on the proton flux, electron acceleration outside the bow shock, and observations of Jovian electrons near earth. All these data are shown to support the conclusion that most, if not all, quiet-time increases in low-energy electron fluxes near earth are of Jovian origin.
U-Th-Pb systematics of selected samples from Apollo 17, Boulder 1, Station 2
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Production of He, Ne, and Ar isotopes and U-236 in lunar materials by solar cosmic ray protons - Production rate calculations
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Thorium and uranium variations in Apollo 17 basalts, and K-U systematics
It is found that Apollo 11 low-K and in particular Apollo 17 mare basalts show a wide range of Th/U ratios unlike other rocks; such variations cannot be explained by near surface crystal fractionation. A two-stage fractional crystallization-partial melting model involving a clinopyroxene cumulate as the major phase can explain the variations in Th/U ratios. Due to the Sm-Nd systematics constraint, several source cumulates are invoked to explain the observed Th/U continuum.
KREEP basalt age - Grain by grain U-Th-Pb systematics study of the quartz monzodiorite clast 15405,88
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4.4 b.y.-old clast in Boulder 7, Apollo 17 - A comprehensive chronological study by U-Pb, Rb-Sr and Sm-Nd methods
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U-Th-Pb systematics of anorthositic gabbros 78155 and 77017 - Implications for early lunar evolution
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Crystal chemistry of Pu and U and concordant fission track ages of lunar zircons and whitlockites
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Type U CAMAC crate controller for the Spacelab multi-crate, multi-processor system
A set of standard CAMAC modules for Spacelab payloads is being developed by NASA. A crate controller, a processor module, memory modules and a databus to connect them are being developed at the Goddard Space Flight Center. These components will provide for the implementation of CAMAC data systems ranging in complexity from fixed-format, single-crate data collection systems not requiring a processor to a multi-crate data system, including several computers (processors). The Spacelab CAMAC data system is introduced with the role of the crate controller described. The implementation and operation of the crate controller is described. The instruction set of the crate controller is also presented.