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

    Erscheinungsdatum :

    1978


    Format / Umfang :

    144 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




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