Magnetic screen for low-power Hall thruster and fixing structure

Abstract

The invention discloses a magnetic screen for a low-power Hall thruster and a fixing structure. The magnetic screen comprises a magnetic screen body and a magnetic screen installation support, whereinthe magnetic screen body is made of a magnetic conductive material, and the magnetic screen installation support is made of a non-magnetic-conductive austenitic stainless steel material. The two parts are matched with each other through the boss, stable and reliable connection is achieved in a fusion welding mode, and meanwhile the two parts are connected with other parts in the thruster througha flanging structure on the magnetic screen installation support. A magnetic circuit structure similar to a high-power Hall thruster is realized through an idea of integrally designing the inner magnetic screen and the outer magnetic screen. And meanwhile, the ceramic channel can be fixed on an integrated structure of the inner magnetic screen and the outer magnetic screen, so that the differencebetween the axial length of the inner coil and the axial length of the ceramic channel in the low-power Hall thruster is made up.

Description

technical field [0001] The invention relates to a magnetic shield and a fixing structure for a low-power Hall thruster, which is suitable for the Hall thruster Background technique [0002] Hall propulsion technology is the mainstream technical direction of spacecraft electric propulsion at present. The Hall thruster mainly includes hollow cathodes, discharge chambers, magnetic poles, magnetic coils, anode / gas distributors, propellant delivery pipelines and support structures; Seoul propulsion technology can increase the payload of spacecraft, reduce launch costs, and extend service life. It is an effective means to improve the efficiency and competitiveness of commercial satellites in the future. [0003] Hall thruster consists of hollow cathode, discharge chamber, magnetic pole (composed of front and rear magnetic pole plates, inner and outer magnetic cores, inner and outer magnetic screens, etc.), inner magnetic coil, outer magnetic coil, anode / gas distributor, propellant...

AI Technical Summary

Problems solved by technology

[0006] The existing solution for implementing a magnetic screen on a low-power Hall thruster is to use a magnetically permeable material for the anode, so that the anode will simultaneously assume the role of the magnetic screen, which will save some space, but the problem is that, Since the anode is located inside the ceramic channel, it is an important part involved in the discharge. When the thruster is working, electrons will continuously bombard the anode, causing its temperature to rise to hundreds of degrees Celsius. At such a high temperature, the magnetic properties of the magnetic permeable material will be affected. , it is easy to cause changes in the magnetic field, which in turn lead to changes in performance

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