Journal
PLASMA SOURCES SCIENCE & TECHNOLOGY
Volume 27, Issue 12, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6595/aaf29a
Keywords
electric propulsion; HEMP-T; particle-in-cell; PIC; plasma simulation; breathing mode; plasma instability
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Funding
- German Space Agency DLR [50RS1510]
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HEMP thrusters develop breathing mode oscillations with frequencies in the 100 kHz range during stable operation in test facilities. The mechanism of those oscillations in the HEMP-TDM3a model, developed by Thales Deutschland GmbH, is investigated using a fully kinetic PIC-MCC simulation model. The formation and time evolution of a breathing mode are discussed. The consequences for stable thruster operation are outlined and the oscillation frequency is compared to a 0D predator-prey oscillation frequency estimate. A comparison with an experimental discharge current measurement of a breathing mode is discussed.
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