Communication Dans Un Congrès Année : 2025

Cathode Spots Dynamics in a High-Current Vacuum Arc Thruster: Aluminum vs Iron

Résumé

This study investigates the apparent motion of cathode spots in a 30 W vacuum arc thruster by means of high-speed imaging. Images taken at 450,000 frames per second allowed to observe the evolution of cathode spots distribution throughout a single single discharge. Experiments were conducted with two different cathode materials: aluminum and iron. Associating the images and the discharge current reveals regions of high local current density, reaching approximately 10^9 A/m2 . Examining patterns in cathode spot clustering and mapping their trajectories lead to valuable insights into cathode erosion dynamics.
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Dates et versions

hal-04957181 , version 1 (19-02-2025)

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Etienne Michaux, Stéphane Mazouffre, Julien Jérémie. Cathode Spots Dynamics in a High-Current Vacuum Arc Thruster: Aluminum vs Iron. AIAA SCITECH 2025 Forum, Jan 2025, Orlando, United States. pp.2025-2386, ⟨10.2514/6.2025-2386⟩. ⟨hal-04957181⟩
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