An Engineering Model (EM) 8 cm Ion Thruster Propulsion Subsystem was developed for operation at a thrust level 5 mN (1.1 mlb) at a specific impulse 1 sub sp = 2667 sec with a total system input power P sub in = 165 W. The system dry mass is 15 kg with a mercury-propellant-reservoir capacity of 8.75 kg permitting uninterrupted operation for about 12,500 hr. The subsystem can be started from a dormant condition in a time less than or equal to 15 min. The thruster has a design lifetime of 20,000 hr with 10,000 startup cycles. A gimbal unit is included to provide a thrust vector deflection capability of + or - 10 degrees in any direction from the zero position. The EM subsystem development program included thruster optimization, power-supply circuit optimization and flight packaging, subsystem integration, and subsystem acceptance testing including a cyclic test of the total propulsion package.


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    Titel :

    Engineering model 8-cm thruster subsystem


    Beteiligte:
    Herron, B. G. (Autor:in) / Hyman, J. (Autor:in) / Hopper, D. J. (Autor:in) / Williamson, W. S. (Autor:in) / Dulgeroff, C. R. (Autor:in) / Collett, C. R. (Autor:in)

    Erscheinungsdatum :

    1978-06-01


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




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