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- W97707265 abstract "Since the beginning of Hall Effect thrusters (HET) research, anomalous electron conductivity has been an outstanding question, preventing the development of predictive thruster models. The increasing interest in this technology for space exploration encourages further attempts to clarify this aspect of the thruster physics. The possible contribution of “near-wall conductivity” to the overall electron conductivity has been long discussed, but it now seems clear that anomalous conductivity due to plasma turbulence must be present to explain the experimental results. Recent PIC simulations have shown that azimuthal instabilities can lead to axial electron transport. In this paper, a simplified study of the influence of an azimuthal instability on electron transport is carried out in the case of a PPS1350 thruster. Adding a fluctuating azimuthal electric field to the time averaged field in the (r, z) plane given by a hybrid model, we have studied single electron trajectories from the cathode to the anode and deduced macroscopic electron transport properties. Our results show how electrons can be driven by the instability from the cathode to the anode and provide an estimate of the mean axial speed of the electrons in the discharge channel. Different amplitudes and wave numbers of the monomode azimuthal instability have been investigated." @default.
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- W97707265 date "2007-01-01" @default.
- W97707265 modified "2023-09-24" @default.
- W97707265 title "Influence of azimuthal instabilities on electron motion in a Hall Effect Thruster" @default.
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