During a single-string integration test of the NASA HiVHAc Hall thruster, a number of plasma diagnostics were implemented to study the effect of varying facility background pressure on thruster operation. These diagnostics characterized the thruster performance, the plume, and the plasma oscillations in the thruster. Thruster performance and plume characteristics as functions of background pressure were previously published. This paper will focus on changes in the plasma oscillation characteristics with changing background pressure. The diagnostics used to study plasma oscillations include a high-speed camera and a set of high-speed Langmuir probes. The results show a rise in the oscillation frequency of the 'breathing' mode with rising background pressure, which is hypothesized to be due to a shortening acceleration/ionization zone. An attempt is made to apply a simplified ingestion model to the data. The combined results are used to estimate the maximum acceptable background pressure for performance and wear testing.


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    Titel :

    Effect of Background Pressure on the Plasma Oscillation Characteristics of the HiVHAc Hall Thruster


    Beteiligte:
    W. Huang (Autor:in) / H. Kamhawi (Autor:in) / R. B. Lobbia (Autor:in) / D. L. Brown (Autor:in)

    Erscheinungsdatum :

    2014


    Format / Umfang :

    15 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch





    Hall Thruster Technology for NASA Science Missions: HiVHAC Status Update AIAA Paper

    Peterson, P. / Kamhawi, H. / Manzella, D. et al. | British Library Conference Proceedings | 2007


    Effect of Background Pressure on the Plasma Oscillation Characteristics of the HiVHAc Hall Thruster

    Huang, Wensheng / Kamhawi, Hani / Lobbia, Robert B. et al. | NTRS | 2014


    The Effects of Background Pressure on Hall Thruster Operation

    Diamant, Kevin / Spektor, Rotislav / Beiting, Edward et al. | AIAA | 2012


    Plasma oscillation effects on nested Hall thruster operation and stability

    McDonald, Michael S. / Sekerak, M. J. / Gallimore, A. D. et al. | IEEE | 2013