Characterization of a 100 A-class LaB 6 hollow cathode for high-power Hall thrusters

Abstract : This works deals with a laboratory model 100 A-class hollow cathode with a sintered lanthanum hexaboride (LaB6) emitter for high-power Hall thrusters. The cathode has been fired up to 70 A with xenon as working gas. The cathode architecture, test setup , ignition procedure and power consumption are described first. The second part of this contribution comments on the emitter temperature, the current-voltage characteristics and the discharge modes obtained for discharge currents in the 30-70 A range and mass flow rates in the 15-30 sccm range. Finally we present electron temperatures and densities measured in the cathode plasma plume by means of incoherent Thomson scattering.
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Stéphane Mazouffre, Romain Joussot, Benjamin Vincent, Sedina Tsikata, S. Oriol, et al.. Characterization of a 100 A-class LaB 6 hollow cathode for high-power Hall thrusters. 36th International Electric Propulsion Conference, Sep 2019, Vienne, Austria. ⟨hal-02346197⟩

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