The particle populations that are expected to inflict the most damage on thin film materials grown on the vacuum Wake Shield Facility (WSF) are ions and energetic neutral atoms with energies in the range of 100 eV to 20 keV. The production of films that have an order of magnitude fewer defects than are now available requires that the 1-keV particle flux be kept lower than 1000 particles/(sq cm s sr keV) (assuming a reasonable spectral shape). WSF will be flown on orbits with an inclination of 28 deg at altitudes of 300-700 km. Because of the background counting rate produced by the about 100 MeV trapped protons in the inner belt, obtaining accurate measurements of the particles of interest is very difficult. The quiet-time background fluxes of the relevant particles are not presently known. At times of magnetic activity, fluxes of 0.1-17 keV O(+) ions as great as 10 million ions/(sq cm s sr keV) have been observed flowing out of the ionosphere at these latitudes. It appears that instrumentation for detailed assessment is essential for the proof-of-concept flight(s) and that real-time monitoring of low-energy ion and energetic neutral radiation will be required for the production flights.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Particle radiation near the orbit of the Vacuum Wake Shield


    Beteiligte:


    Erscheinungsdatum :

    1990-02-01



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Particle radiation near the orbit of the Vacuum Wake Shield

    BERING, EDGAR A. / IGNATIEV, ALEX | AIAA | 1990


    A Study of Extreme High Vacuum Wake Shield Facilities with Changeable Wing in Low-Earth Orbit

    Da, D. / Zhang, H. / International Astronautical Federation | British Library Conference Proceedings | 1994


    Epitaxial thin film growth in low Earth orbit on the Wake Shield Facility

    Horton, Charles / Ignatiev, Alex / Sterling, Mark et al. | AIAA | 1995


    Vacuum and Flow Field Results from the Wake Shield Flight Experiment

    Desai, M. / Forest, R. / Horton, C. et al. | British Library Conference Proceedings | 1995


    III-V Compound Semiconductor Film Growth in Low Earth Orbit on the Wake Shield Facility

    Horton, C. / Ignatiev, A. / Sterling, M. et al. | British Library Conference Proceedings | 1995