In-FEEP Ion Beam Neutralization with Thermionic and Field Emission Cathodes

Colleen Marrese-Reading, J. Polk, Juergen Mueller , A. Owens, Martin Tajmar, C. Spindt, R. Fink

    Research output: Chapter in Book or Conference ProceedingsConference Proceedings with Oral Presentationpeer-review


    Charge neutralization of an In-FEEP thruster was demonstrated with three different electron sources by zeroing the floating potential of the thruster and neutralizer system. The three cathodes used in the investigation include a mixed metal thermionic cathode, a carbon nanotube field emission cathode, and a Spindt-type Mo field emission array cathode. The field emission cathodes significantly improved the power to thrust ratio of the thruster and neutralizer system. At 10 µN, the power-to-thrust ratio of the ion and electron source FEEP system decreased by 50% when the Spindt-type cathode was used. Measured plasma potential were consistent with theoretical results obtained previously.
    Original languageEnglish
    Title of host publication27th International Electric Propulsion Conference
    Number of pages1
    Publication statusPublished - 2001
    Event27th International Electric Propulsion Conference -
    Duration: 1 Jan 2001 → …


    Conference27th International Electric Propulsion Conference
    Period1/01/01 → …

    Research Field

    • Not defined


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