A magnetic screen structure of a Hall thruster with a large aspect ratio

Abstract

The invention discloses a magnetic screen structure of a hall thruster with a large height-diameter ratio and belongs to the technical field of hall thrusters. The problems that the medium diameter position of a channel of an existing hall thruster adopting the large height-diameter ratio design is low in axial magnetic field gradient and low in thruster performance are solved. The magnetic screenstructure comprises an inner magnetic screen, an outer magnetic screen and a supporting component. The circle centers of the inner magnetic screen and the outer magnetic screen coincide with the circle center of the supporting component. Moreover, the inner magnetic screen, the outer magnetic screen and the supporting component are fixed through mutual buckling of hooks and catching grooves so that a cylindrical structure with nested inside and outside can be formed. According to the magnetic screen structure, when the hall thruster is designed at the large height-diameter ratio, the inner magnetic screen and the outer magnetic screen are not connected with a same bottom surface, and the hall thruster has the advantages, of the hall thruster adopting the large height-diameter ratio design, that the thruster thrust-weight ratio is increased, and the wall surface erosion is weakened; furthermore, the effective load of an aerospace craft is increased, the service life of the aerospace craft is prolonged, and the maneuvering flexibility of the aerospace craft is improved; and meanwhile, the axial magnetic field gradient of the medium diameter position of the channel of the hall thruster adopting the large height-diameter ratio design is increased, and the working performance of the thruster is improved.

Description

technical field [0001] The invention relates to a magnetic shield structure of a Hall thruster, in particular to a magnetic shield structure of a Hall thruster with a large aspect ratio, and belongs to the technical field of the Hall thruster. Background technique [0002] The Hall thruster is a widely used electric propulsion device at present. Compared with the traditional chemical propulsion device, it has the advantages of high efficiency, high specific impulse and long life. Its working principle is: there are mutually orthogonal radial magnetic fields and axial electric fields in the channel of the Hall thruster. The electrons emitted from the cathode into the channel drift to the anode under the action of the magnetic field and electric field, and are ejected from the gas distributor. The working medium gas undergoes impact ionization, and the ionized electrons are confined in the channel by the radial magnetic field due to their small mass, while the ion mass is larg...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of low axial magnetic field gradient at the middle diameter of the Hall thruster channel and low performance of the thruster in the existing design of the Hall thruster with a large height-to-diameter ratio, the present invention provides a magnetic shield structure of the Hall thruster with a large height-to-diameter ratio

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