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  • Other Sources  (3)
  • 1
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    Groundbased studies of spacecraft glow and erosion caused by impact of oxygen and nitrogen beams (1987)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: To simulate surface reactions in the space environment a ground-based facility was developed that produces a very high flux 10(14) to 10(16)/sq cm/s of low energy (2 to 20 eV) neutral atoms and molecules. The neutral beams are created using a method involving neutralization and reflection of ions from a biased limiter, where the ions are extracted from a toroidal plasma source. The spectra of emission due to beam-solid interactions on targets of Chemglaze Z-306 optical paint and Kapton are presented. Erosion yields for carbon and Kapton targets with low energy (approx. 10 eV) nitrogen and oxygen beams were measured. The reaction rates and surface morphology for the erosion of Kapton are similar to those measured in experiments on STS-5.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: Jet Propulsion Lab., Proceedings of the NASA Workshop on Atomic Oxygen Effects; p 164
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    A ground-based experimental test program to duplicate and study the spacecraft glow phenomenon (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The use of a plasma device, the Advanced Concepts Torus-I, for producing atoms and molecules to study spacecraft glow mechanisms is discussed. A biased metal plate, located in the plasma edge, is used to accelerate and neutralize plasma ions, thus generating a neutral beam with a flux approx. 5 x 10 to the 14th power/sq cm/sec at the end of a drift tube. Our initial experiments are to produce a 10 eV molecular and atomic nitrogen beam directed onto material targets. Photon emission in the spectral range 2000 to 9000 A from excited species formed on the target surface will be investigated.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Marshall Space Flight Center 2d Workshop on Spacecraft Glow; p 202-211
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Detection of surface glow related to spacecraft glow phenomena (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: A source of low energy neutral atoms and molecules has been developed by using a biased limiter to scrape off and reflect neutralized ions from a toroidal plasma. Beams of nitrogen and nitrogen-oxygen mixtures with energies of 1 to 15 eV and fluxes greater than about 10 to the 14 per centimeter per second were directed onto target surfaces consisting of Z-302 and Z-306 paints. With the nitrogen beams, a glow due to beam-surface interactions was successfully detected. In addition, a volume glow effect due to beam-gas interactions was observed which may play a role in spacecraft glow.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: Geophysical Research Letters (ISSN 0094-8276); 13; 377-380
    Format: text
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    NASA TECHNICAL REPORTS
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