Novel Hall thrustor

Abstract

The invention belongs to the technical field of Hall propellers, and particularly relates to a novel Hall thruster. The novel Hall thrustor comprises a first storage cavity and a second storage cavity, wherein the first storage cavity and the second storage cavity are used for storing gas propellants. According to the novel Hall thrustor, the first storage cavity comprises a first gas inlet hole and second gas inlet holes, the first gas inlet hole and the second gas inlet holes provide a buffer space for the gas propellants to enter an anode, the flow resistance is increased, and the flow speed is reduced; meanwhile, a dense porous thin film is further arranged between the second storage cavity and the anode, so that the flow resistance is further reduced; the first storage cavity furthercomprises a transverse gas pipe and a third gas inlet hole located in the transverse gas pipe in an alternative embodiment; and multi-layer buffering is carried out on the gas propellants entering thecavities from the first gas inlet hole, the flowing time of a gas flow is increased to reduce the temperature of the wall surface, and meanwhile, the ionization efficiency of the gas is greatly improved.

Description

Technical field [0001] The invention belongs to the technical field of Hall thrusters, in particular to a novel Hall thruster. Background technique [0002] Hall thruster is an advanced electric propulsion device, which is widely used in the field of satellite position maintenance and attitude control, and has become the preferred propulsion device for future space vehicles due to its advantages of simple structure, high specific impulse, and high efficiency. The electrons in the channel of the Hall thruster can be divided into slow electrons, middle electrons and fast electrons according to their energy. The energy of the slow electrons and middle electrons migrating from the exit of the thruster to the anode in the channel is relatively low, and they will directly Bombarded on the anode, some of the remaining electrons with higher energy will directly enter the buffer cavity, and most of the fast electrons will directly hit the insulating wall or the gas distributor, and t...

AI Technical Summary

Problems solved by technology

[0003] However, for high-power Hall thrusters, on the one hand, the high temperature of the anode wall will increase the bombardment loss of high-energy electrons to the anode, and will also seriously affect the magnetic shielding effect of the anode wall, making the magnetic permeability of the anode wall On the other hand, after the gas enters the pipeline and before bombarding the anode in the buffer chamber, due to the high flow rate of the existing gas entering the buffer chamber, low flow resistance, and the swirling flow time of the gas in the buffer chamber Short, so the anode is bombarded when the buffer chamber is not filled with ionized gas, resulting in low ionization efficiency and specific impulse

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