In situ erosion measurement tools for electric propulsion thrusters: triangular laser head and telemicroscope
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Published:2022-02-08
Issue:1
Volume:9
Page:
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ISSN:2195-7045
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Container-title:EPJ Techniques and Instrumentation
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language:en
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Short-container-title:EPJ Techn Instrum
Author:
Bundesmann CarstenORCID, Eichhorn Christoph, Neumann Horst, Scholze Frank, Spemann Daniel, Tartz Michael, Leiter Hans J., Gnizdor Roman Y., Scortecci Fabrizio
Abstract
AbstractThe lifetime of electric propulsion (EP) thrusters depends particularly on the erosion characteristics of operation relevant components, for instance, the grid hole erosion of gridded ion thrusters or the channel wall erosion of Hall effect thrusters. Here two tools for in situ erosion measurements are presented, a triangular laser head for surface profiling and a telemicroscope for high-resolution optical imaging. Both can give access to radial and axial erosion parameters. The measurements can be done in situ without the need for breaking the vacuum and dismounting the thruster, which reduces thruster testing time considerably. In situ measurements can also help to ensure reproducibility of thruster performance conditions and can improve statistics of thruster characterization. The present work describes the fundamentals of both techniques in detail, selected experimental setups are presented, their performance is characterized and critically evaluated. The capabilities and limitations related to erosion measurements of EP thrusters are, exemplary, demonstrated for a gridded ion thruster RIT-22 and a Hall effect thruster SPT-100D.
Funder
European Space Agency Leibniz-Institut für Oberflächenmodifizierung e.V.
Publisher
Springer Science and Business Media LLC
Reference16 articles.
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