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- W2739968478 abstract "An alpha particle densitometer was developed for possible application to measurement of the atmospheric density-altitude profile on Martian entry. The device uses an Am-241 radioactive-foil source, which emits a distributed energy spectrum, located about 25 to 75 cm from a semiconductor detector. System response - defined as the number of alphas per second reaching the detector with energy above a fixed threshold - is given for Ar and CO2. The altitude profile of density measurement accuracy is given for a pure CO2 atmosphere with 5 mb surface pressure. The entire unit, including dc-dc converters, requires less than 350 milliwatts of power from +28 volts, weighs about 0.85 lb and occupies less than 15 cubic inches volume." @default.
- W2739968478 created "2017-08-08" @default.
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- W2739968478 date "1972-05-01" @default.
- W2739968478 modified "2023-09-23" @default.
- W2739968478 title "Design, fabrication and calibration of alpha particle densitometers for measuring planetary atmospheric density" @default.
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- W2739968478 hasPublicationYear "1972" @default.
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