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Measurement of 5-eV atomic oxygen using carbon based films: preliminary results

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3 Author(s)
White, C.B. ; Astronaut. Res. Group, Univ. of Southampton, UK ; Roberts, Graham T. ; Chambers, Alan R.

Carbon-based sensors have been developed to measure the atmospheric neutral atomic oxygen (AO) flux experienced by spacecraft in low Earth orbit. Thin- and thick-film carbon sensor elements were deposited onto an alumina substrate between thick-film gold tracks and silver palladium solder pads. AO flux is deduced by measuring resistance changes as the carbon film erodes and applying a simple theory. A wide range of responses were observed that are dependent on the deposition process and post deposition annealing. The deposition methods used were dc magnetron sputtering, e-beam evaporation, and screen-printing. The sensors tested compare favorably with similar silver-based sensors that have been flown previously on small satellite missions with significant mass/power constraints.

Published in:

Sensors Journal, IEEE  (Volume:5 ,  Issue: 6 )

Date of Publication:

Dec. 2005

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