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  • 1
    Publication Date: 2013-08-31
    Description: An experimental effort to characterize an existing 5-eV neutral atomic oxygen beam facility being developed at Princeton Plasma Physics Laboratory is described. This characterization effort includes atomic oxygen flux and flux distribution measurements using a catalytic probe, energy determination using a commercially designed quadrupole mass spectrometer (QMS), and the exposure of oxygen-sensitive materials in this beam facility. Also, comparisons were drawn between the reaction efficiencies of materials exposed in plasma ashers, and the reaction efficiencies previously estimated from space flight experiments. The results of this study show that the beam facility is capable of producing a directional beam of neutral atomic oxygen atoms with the needed flux and energy to simulate low Earth orbit (LEO) conditions for real time accelerated testing. The flux distribution in this facility is uniform to +/- 6 percent of the peak flux over a beam diameter of 6 cm.
    Keywords: ATOMIC AND MOLECULAR PHYSICS
    Type: NASA, Lyndon B. Johnson Space Center, Fourth Annual Workshop on Space Operations Applications and Research (SOAR 90); p 764-771
    Format: application/pdf
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  • 2
    Publication Date: 2019-08-13
    Description: The elimination of CFC's, Halons, TCA, other ozone depleting chemicals, and specific hazardous materials is well underway. The phaseout of these chemicals has mandated changes and new developments in aerospace materials and processes. We are beyond discovery and initiation of these new developments and are now in the implementation phase. This conference provided a forum for materials and processes engineers, scientists, and managers to describe, review, and critically assess the evolving replacement and clean propulsion technologies from the standpoint of their significance, application, impact on aerospace systems, and utilization by the research and development community. The use of these new technologies, their selection and qualification, their implementation, and the needs and plans for further developments are presented.
    Keywords: Chemistry and Materials (General)
    Type: NASA/CP-1999-209258 , M-921 , NAS 1.55:209258 , Third Aerospace Environmental Technology Conference; NASA/CP-1999-209258|Aerospace Environmental Technology Conference; Jun 01, 1998 - Jun 03, 1998; Huntsville, AL; United States
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  • 3
    Publication Date: 2019-08-13
    Description: The mandated elimination of CFC'S, Halons, TCA, and other ozone depleting chemicals and specific hazardous materials has required changes and new developments in aerospace materials and processes. The aerospace industry has been involved for several years in providing product substitutions, redesigning entire production processes, and developing new materials that minimize or eliminate damage to the environment. These activities emphasize replacement cleaning solvents and their application, verification, compliant coatings including corrosion protection system and removal techniques, chemical propulsion effects on the environment, and the initiation of modifications to relevant processing and manufacturing specifications and standards.
    Keywords: Chemistry and Materials (General)
    Type: NASA-CP-3349 , M-827 , NAS 1.55:3349 , Aerospace Environmental Technology; Aug 06, 1996 - Aug 08, 1996; Huntsville, AL; United States
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  • 4
    Publication Date: 2019-08-13
    Description: The mandated elimination of CFC's, Halons, TCA, and other ozone depleting chemicals and specific hazardous materials has required changes and new developments in aerospace materials and processes. The aerospace industry has been involved for several years in providing product substitutions, redesigning entire production processes, and developing new materials that minimize or eliminate damage to the environment. These activities emphasize replacement cleaning solvents and their application verifications, compliant coatings including corrosion protection systems, and removal techniques, chemical propulsion effects on the environment, and the initiation of modifications to relevant processing and manufacturing specifications and standards.
    Keywords: Chemistry and Materials (General)
    Type: NASA-CP-3348 , NAS 1.55:3348 , M-826 , Aug 06, 1996 - Aug 08, 1996; Huntsville, AL; United States
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