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

Measurement of 5-eV atomic oxygen using carbon-based films: preliminary results
Measurement of 5-eV atomic oxygen using carbon-based films: preliminary results
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.
annealing, carbon, gas sensors, oxygen, sputter deposition, thick films, thin films
1530-437X
1206-1213
White, C.B.
15866a85-ac44-4239-b7a9-de3d45e5aa1f
Roberts, G.T.
deaf59ac-e4ee-4fc2-accf-df0639d39368
Chambers, A.R.
74fa9b7e-6362-478e-a038-15f2828c5446
White, C.B.
15866a85-ac44-4239-b7a9-de3d45e5aa1f
Roberts, G.T.
deaf59ac-e4ee-4fc2-accf-df0639d39368
Chambers, A.R.
74fa9b7e-6362-478e-a038-15f2828c5446

White, C.B., Roberts, G.T. and Chambers, A.R. (2005) Measurement of 5-eV atomic oxygen using carbon-based films: preliminary results. IEEE Sensors Journal, 5 (6), 1206-1213. (doi:10.1109/JSEN.2005.858973).

Record type: Article

Abstract

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.

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Published date: 2005
Keywords: annealing, carbon, gas sensors, oxygen, sputter deposition, thick films, thin films
Organisations: Engineering Mats & Surface Engineerg Gp, Aerodynamics & Flight Mechanics, Astronautics Group

Identifiers

Local EPrints ID: 23671
URI: https://eprints.soton.ac.uk/id/eprint/23671
ISSN: 1530-437X
PURE UUID: d7b6d74a-2303-49f2-9692-412e8dec6a4e

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Date deposited: 20 Mar 2006
Last modified: 17 Jul 2017 16:16

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Contributors

Author: C.B. White
Author: G.T. Roberts
Author: A.R. Chambers

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