Hall thrustor capable of realizing self cleaning of polluted membrane of discharge channel and self cleaning method of Hall thrustor

Abstract

The invention relates to a Hall thrustor capable of realizing self cleaning of a polluted membrane of a discharge channel and a self cleaning method of the Hall thrustor, which aim to resolve problems that an exiting method for cleaning a polluted membrane of a discharge channel of a Hall thrustor by means of opening a vacuum tank is easy to change vacuum conditions of a test device, assembly errors are easy to be caused during assembly and disassembly, and experimental results are affected greatly. An anode is arranged in the middle of the discharge channel; a cathode is arranged at an outlet of the discharge channel; an outer coil and an inner coil are symmetrically arranged on two sides of the outlet of the discharge channel; the outer coil, the inner coil and an additional coil form an excitation loop after being electrified and excited; and a self cleaning power source is added between a gas distributor and the anode to form a self cleaning preionization electric field. The cleaning method includes steps of firstly, generating self cleaning ions; and secondly, forcing out an inner wall surface or an outer wall surface by the aid of the self cleaning ions to realize self cleaning of the polluted membrane of the discharge channel. An ion jet flow direction is controlled by means of changing magnetic field configuration, so that the self cleaning method is realized, and the structure of the thrustor does not need to be changed.

Description

technical field [0001] The invention relates to a Hall thruster. Background technique [0002] The Hall thruster belongs to the category of aerospace electric propulsion and is a typical representative of electromagnetic electric propulsion. It has the characteristics of simple structure, high specific impulse and high efficiency. Its structure is mainly composed of excitation circuit, cathode, anode, gas distributor and discharge channel. Its working principle is that under the approximately radial magnetic field distribution in its discharge channel, the discharge plasma between the anode and the cathode will generate a self-consistent axial electric field in the channel. Under the action of the electromagnetic field, the electrons make a circumferential Hall drift movement and move toward the anode; during the movement toward the anode, they collide with the propellant atoms injected from the gas distributor and ionize them to form ions, and the ions are in the channel ...

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problem that the vacuum condition of the test device is easily changed in the existing method of opening the vacuum tank to clean the polluted film of the discharge channel of the Hall thruster, and the assembly error is easily caused during the disassembly process, which has a great impact on the experimental results. The proposed Hall thruster and its self-cleaning method can self-clean the polluted film of the discharge channel

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