Research related to measurements of atomic species in the earth's upper atmosphere Quarterly status report
Reaction kinetics associated with oxygen atoms interaction with platinum foil under simulated upper atmosphere conditions
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Reaction kinetics associated with oxygen atoms interaction with platinum foil under simulated upper atmosphere conditions
Kinetics and mechanisms associated with interaction of molecular oxygen and platinum ribbon studied under conditions similar to that of upper atmosphere
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Interaction of oxygen atoms with solid surfaces for interpretation of mass spectrometer signals to determine composition of upper atmosphere
Recombination coefficient of gold, sorption and desorption rates of oxygen on gold, and sticking coefficient of carbon monoxide relaxed to upper atmosphere research
Surface reaction kinetics of oxygen atoms and silver
Quantitative analysis by mass spectrometers of oxygen in upper atmosphere
Sorption and desorption interactions of oxygen on silver and platinum
Oxygen atom recombination reactions with solid surfaces for mass spectrometer atomic oxygen composition correction in upper atmosphere
Interaction kinetics and mechanisms of oxygen atoms with stainless steel surfaces as used in earth upper atmosphere flight
Reaction kinetics of oxygen atom with aluminum in upper atmosphere
Rocket and satellite borne mass spectrometer analysis of atomic oxygen density in earths upper atmosphere
Interaction kinetics of atomic oxygen and hydrogen on metal surfaces of satellite-borne mass spectrometers
Near stoichiometric binary alloys atomic ordering parameters quantization by field ion micrography, using direct counting and optical transformation techniques
Atomic N and C photoionization cross sections by shock tube vacuum UV spectrometry
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Measurements of atomic recombination probabilities important in determining energy release to reusable spacecraft thermal protection surfaces during reentry are presented. An experimental apparatus constructed to examine recombination of atomic oxygen from thermal protection and reference materials at reentry temperatures is described. The materials are examined under ultrahigh vacuum conditions to develop and maintain well characterized surface conditions that are free of contamination. When compared with stagnation point heat transfer measurements performed in arc jet facilities, these measurements indicate that a significant fraction of the excess energy available from atom recombination is removed from the surface as metastable O2.
A method for measuring atomic oxygen flux to a probe surface is presented which uses two probes. One is a glass probe enclosing a small ceramic resistor heater and a thermocouple for determining the ambient local temperature. Another probe has a silver tip and a thermocouple inside it. In an atomic oxygen environment, the silver probe will quickly develop a silver oxide coating which provides for atomic oxygen recombination. The use of the two probes allows a more accurate determination of the energy input into the catalytic silver oxide probe due to recombination.