Hall thruster with novel buffer cavity

Abstract

The invention discloses a Hall thruster with a novel buffer cavity, and belongs to the technical field of Hall thrusters. The Hall thruster with the novel buffer cavity solves the problems that in thecase of an existing low-power Hall thruster, due to the fact that the size is too small, gas density and homogenization degree are not high. An inner ceramic screen and an outer ceramic screen of theHall thruster with the novel buffer cavity are of an inside-and-outside nested cylindrical structure, a radial gap and an axial gap are formed between the inner ceramic screen and the outer ceramic screen, so that a buffer cavity structure between the inner ceramic screen and the outer ceramic screen is formed, an anode and the outer ceramic screen are fixedly mounted on a bottom plate through agas distributor and a nut, an inner permanent magnet is fixedly mounted in the inner ceramic screen through a permanent magnet support, and is fixedly mounted on the bottom plate through a fixing nut,and an outer permanent magnet is mounted on the outer side of the outer ceramic screen in a sleeving mode. A discharge channel of the Hall thruster with the novel buffer cavity is formed by insertingthe outer ceramic screen and the inner ceramic screen, the buffer cavity is formed at the area between the outer ceramic screen and the inner ceramic screen, a gas motion path is enlarged through thenovel buffer cavity structure, and gas is more sufficiently homogenized.

Description

technical field [0001] The invention relates to a Hall thruster with a novel buffer cavity, belonging to the technical field of Hall thrusters. Background technique [0002] Hall thrusters are currently widely used in electric propulsion systems. Compared with traditional chemical propulsion, they have the advantages of high efficiency, high specific impulse, high thrust density, high efficiency and long life. Its working principle is: there is an orthogonal electromagnetic field in the discharge channel of the Hall thruster, and the electrons emitted from the cathode into the channel are affected by the orthogonal electromagnetic field and drift to the anode, and at the same time, the working fluid ejected from the gas distributor The gas is ionized by collision, and the ionized electrons are confined in the channel by the radial magnetic field due to their small mass. However, the ion mass is large and the magnetic field cannot constrain it, so it is accelerated and ejecte...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of low gas density and low homogenization degree of the existing low-power Hall thruster due to too small size, the present invention provides a Hall thruster with a new type of buffer cavity, and uses the new type of buffer cavity to improve the low power The degree of homogenization and density of the neutral gas of the Hall thruster improves the discharge performance and stability of the Hall thruster

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