The Plasma Contactor Unit (PCU) was developed by the Rocketdyne division of The Boeing Company to control charging of the International Space Station (ISS). Each PCU contains a Hollow Cathode Assembly (HCA), which emits the charge control electrons. The HCAs were designed and fabricated at NASA s Glenn Research Center (GRC). GRC's HCA development program included manufacture of engineering, qualification, and flight model HCAs as well as qualification and wear tests. GRC tracks the on-orbit data for the flight HCAs in order to ascertain their overall health. As of April 5, 2004, 43 ignitions and over 6000 hours have been accumulated on a single unit. The flight HCAs continue to operate flawlessly. This paper will discuss the operation of the HCAs during ground tests and on-orbit operation from initial startup to April 30, 2004.


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    Title :

    On the Operational Status of the ISS Plasma Contactor Hollow Cathodes


    Contributors:

    Conference:

    40th Joint Propulsion Conference and Exhibit ; 2004 ; Fort Lauderdale, FL, United States


    Publication date :

    2004-08-01


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Operational Status of the ISS Plasma Contactor Hollow Cathodes

    T. P. Burke / C. B. Carpenter | NTIS | 2004



    On the Operational Status of the International Space Station Plasma Contactor Hollow Cathodes

    Kamhawi, H. / Patterson, M. J. / American Institute of Aeronautics and Astronautics et al. | British Library Conference Proceedings | 2005