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- W1523193292 abstract "Two methods for real time internal diagnostics of arcjet engines are described. One method uses cold, thermal, or epithermal neutrons. Cold neutrons are used to detect the presence and location of hydrogenous propellants. Thermal neutrons are used to delineate the edge contours of anode and cathode surfaces and to measure stress/strain. Epithermal neutrons are used to measure temperatures on arcjet surfaces, bulk material temperatures, and point temperatures in bulk materials. It is found that this method, with an exposure time of 10 min, produces at temperature accuracy for W or Re of + or - 2.5 C. The other method uses visible-light high-speed photogrammetry to obtain images of the transient behavior of the arc during start-up and to relate this behavior to electrial supply characteristics such as voltage, current, and ripple." @default.
- W1523193292 created "2016-06-24" @default.
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- W1523193292 date "1989-07-12" @default.
- W1523193292 modified "2023-09-23" @default.
- W1523193292 title "Neutron and high speed photogrammetric arcjet diagnosis" @default.
- W1523193292 doi "https://doi.org/10.2514/6.1989-2955" @default.
- W1523193292 hasPublicationYear "1989" @default.
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