Magnetic circuit of a long-life Hall thruster

Abstract

The invention discloses a magnetic circuit of a long-service-life Hall thruster which comprises an inner magnetic screen, an outer magnetic screen, an inner magnetic pole, an outer magnetic pole, a magnetic conductive bottom plate, an inner magnetic core, a magnetic conductive outer shell, an inner coil and an outer coil, wherein the thruster is of an axisymmetric structure; the inner core surrounds the inner magnetic core; the inner magnetic screen surrounds the inner coil; the outer magnetic screen surrounds the inner magnetic screen; the outer coil surrounds the outer magnetic screen; the magnetic conductive outer shell surrounds the outer coil; the two ends of the inner magnetic core are connected with the magnetic conductive bottom plate and the inner magnetic core separately; one endof each of the inner magnetic screen and the outer magnetic screen is connected onto the magnetic conductive bottom plate; the two ends of the magnetic conductive outer shell are connected with the magnetic conductive bottom plate and the outer magnetic pole separately; the outer coil is surrounded by the magnetic conductive outer shell, the outer magnetic screen, the magnetic conductive bottom plate and the outer magnetic pole; and the inner coil is surrounded by the inner magnetic core, the magnetic conductive bottom plate, the inner magnetic screen and the inner magnetic pole.

Description

technical field [0001] The invention relates to a magnetic circuit of a long-life Hall thruster. Background technique [0002] The Hall thruster is currently a typical electric propulsion device in the world. It is used on spacecraft to perform orbit transfer and position maintenance tasks. figure 1 is an axial cross-sectional view of an example of a Hall thruster. The propellant xenon enters the channel from the anode 30 upstream of the annular discharge channel 20, and the anode provides a high potential; electrons are ejected from the cathode 40 at the outlet downstream of the annular discharge channel, and the cathode provides a low potential. Part of the electrons ejected from the cathode enters the interior of the annular discharge channel, and undergoes Hall drift motion under the action of the radial magnetic field generated by the external magnetic circuit 10 and the axial electric field generated by the internal self-consistency, and the electrons and propellant a...

AI Technical Summary

Problems solved by technology

At present, the existing Hall thruster magnetic circuit structure ( figure 2 ) does not guarantee a long life, and the relevant dimensions in the magnetic circuit must be effectively designed to achieve a long life of the thruster

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