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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    Titel :

    On the Operational Status of the ISS Plasma Contactor Hollow Cathodes


    Beteiligte:

    Kongress:

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


    Erscheinungsdatum :

    01.08.2004


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




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