In situ erosion measurement tools for electric propulsion thrusters: triangular laser head and telemicroscope

EPJ Techniques and Instrumentation

Fabrizio Scortecci¹  Hans J. Leiter²  Roman Y. Gnizdor³  Christoph Eichhorn⁴  Carsten Bundesmann⁴  Frank Scholze⁴  Michael Tartz⁴  Horst Neumann⁴  Daniel Spemann⁴ 

[1] Aerospazio s.r.l.;ArianeGroup GmbH;Design Department, JSC Engineering Design Bureau Fakel;Tools Unit, Leibniz Institute of Surface Engineering (IOM);

关键词: Electric propulsion;    Gridded ion thruster;    Hall effect thruster;    Erosion measurements;    Telemicroscope;    Triangular laser head;   

DOI  :  10.1140/epjti/s40485-022-00076-z

来源: DOAJ

【 摘 要 】

Abstract The 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.

【 授权许可】

Unknown