Escobar Antón, DiegoAhedo Galilea, Eduardo Antonio2019-11-072019-11-072014-11-20IEEE Transactions on Plasma Science (Special issue IEPC 2013), 43(1), Nov. 2014, Pp. 149-1570093-3813https://hdl.handle.net/10016/29147Proceeding of: 33rd International Electric Propulsion Conference (IEPC 2013)A linearized time-dependent 2-D (axial and azimuthal) fluid model of the Hall thruster discharge is presented. This model is used to carry out a global stability analysis of the plasma response, as opposed to the more common local stability analyses. Experimental results indicate the existence of low-frequency long-wave-length azimuthal oscillations in the direction of the E × B drift, usually referred to as spokes. The present model predicts the presence of such oscillations for typical Hall thruster conditions with a frequency and a growth rate similar to those found in experiments. Moreover, the comparison between the simulated spoke and the simulated breathing mode, a purely axial low-frequency oscillation typical in Hall thrusters, shows similar features in them. Additionally, the contribution of this azimuthal oscillation to electron conductivity is evaluated tentatively by computing the equivalent anomalous diffusion coefficient from the linear oscillations. The results show a possible contribution to anomalous diffusion in the rear part of the thruster.9eng© 2014 IEEE.Plasma propulsionPlasma simulationPlasma stabilityPlasma transport processesconference paperAeronáuticaFísicahttps://doi.org/10.1109/TPS.2014.2367913open access1491157IEEE Transactions on Plasma Science (Special issue IEPC 2013)43CC/0000021863