Hall thruster with double magnetic screens

Abstract

The invention discloses a Hall thruster with double magnetic screens, and belongs to the technical field of Hall thrusters. The Hall thruster solves the problems that in an existing Hall thruster channel, due to the fact that electrons and the wall face interact frequently, energy deposition of the wall face is caused, and heat instability and energy loss are caused. According to the Hall thruster, an additional magnetic screen is additionally arranged on a traditional Hall thruster to form a double-magnetic-screen structure, the double magnetic screens are used for carrying out secondary short circuit on a magnetic field close to the wall face, and therefore magnetic lines of force are guided not to penetrate through the channel and an anode any more, the energy deposition problem of theelectrons on the wall face is reduced, and the electron current is controlled. The double magnetic screens are used for solving the energy deposition problem of the electrons in the channel on the wall face, and the problems of discharge heat instability of the thruster and performance loss caused by energy loss are avoided. Meanwhile, the electron current is restrained, and the current utilization rate is increased. In addition, the thickness of the additional magnetic screen and insulation between an inner magnetic screen and the anode are guaranteed, the robustness and the service life of the additional magnetic screen are guaranteed, and the Hall thruster can effectively work for a long time.

Description

technical field [0001] The invention relates to a Hall thruster with double magnetic screens, belonging to the technical field of Hall thrusters. Background technique [0002] With the continuous development of the aerospace industry, higher requirements are put forward for the life and performance of the Hall thruster. One of the important factors affecting the discharge life and performance of the Hall thruster is the energy deposition on the wall. The higher the energy deposition, the easier it is to transfer heat to the magnetic circuit, which will cause thermal instability and also mean greater energy loss. A factor that affects performance is the current utilization rate, which directly affects the discharge efficiency of the thruster. For the Hall thruster, the current utilization rate pursues higher ion current and lower electron current. The wall energy deposition is caused by the interaction between the plasma and the discharge channel, and the interaction between...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of thermal instability and energy loss caused by the frequent interaction between electrons and the wall in the channel of the existing Hall thruster, the present invention provides a Hall thruster with double magnetic shields. The double magnetic shield is used to perform a secondary short circuit on the magnetic field near the wall, so that the magnetic field lines no longer pass through the channel and the anode, thereby reducing the problem of electron energy deposition on the wall and controlling the electron current

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