Communication Dans Un Congrès Année : 2025

Investigation of Electron Current Oscillations in the Plasma of a 5 kW-Class Hall Thruster Running on Xenon and Krypton

Résumé

This contribution presents the examination of electron current time-series acquired in the plasma of the 5 kW-class PPS ® Dual Hall thruster fired with xenon and krypton. The thruster was fired with xenon and krypton as propellant over a broad range of discharge voltages [250-600 V] and input powers [2.5-6 kW] in the PIVOINE-2G vacuum chamber. Time-resolved electron current measurements have been performed in the far-field plume with a cylindrical Langmuir probe polarized above the plasma potential to capture the whole electron population. A high-sensitivity calibrated current probe was used to directly measure the electron current with a 100 MHz sampling rate. Analysis of the electron current time-series and associated discharge current traces has been carried out with various tools: the Fourier transform, the wavelet transform and the Huang-Hilbert transform. The study reveals the impact of the applied voltage, the power and the propellant on different oscillation modes, namely the breathing mode, the ion transit-time mode and the high-frequency modes. It also shows similarities and discrepancies between the electron current dynamics and the discharge current dynamics. Finally, correlations between the various modes are explored.

Domaines

Plasmas
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Dates et versions

hal-04957150 , version 1 (21-02-2025)

Identifiants

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Vincent Delbosq, Stéphane Mazouffre. Investigation of Electron Current Oscillations in the Plasma of a 5 kW-Class Hall Thruster Running on Xenon and Krypton. AIAA SCITECH 2025 Forum, Jan 2025, Orlando, FL, United States. pp.2025-0065, ⟨10.2514/6.2025-0065⟩. ⟨hal-04957150⟩
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