Permanent magnet Hall thruster adopting inner magnetic pole cover plate to prolong service life

Abstract

The invention discloses a permanent magnet Hall thruster adopting an inner magnetic pole cover plate for prolonging the service life, belongs to the technical field of electric propulsion systems, and aims to solve the problems that an inner magnetic pole cover plate in an existing Hall thruster is easily eroded by plasmas and loses a thermal protection effect, so that the temperature of a permanent magnet is too high, a demagnetization phenomenon is generated, and the service life of the thruster is influenced. An inner magnetic pole support is cylindrical and arranged in the center of a bottom plate, an inner magnetic pole cover plate is installed on the top of the inner magnetic pole support, an annular cavity is formed between the inner magnetic pole cover plate and the inner magnetic pole support, an annular inner permanent magnet is embedded in the annular cavity, and an annular outer magnetic pole support is arranged on the outer side of the bottom plate. The outer permanent magnet is embedded in a circular ring of the outer magnetic pole support, a magnetic screen is arranged between the inner permanent magnet and the outer permanent magnet, and a discharge channel is arranged on the inner side of the magnetic screen; a round hole is formed in the top of the inner magnetic pole cover plate, the graphite cover plate is installed in the round hole, the graphite cover plate and the inner magnetic pole cover plate are concentrically matched, and the inner magnetic pole cover plate is made of titanium or titanium alloy. The Hall thruster is used for the Hall thruster.

Description

technical field [0001] The invention relates to a permanent magnet Hall thruster which adopts an inner magnetic pole cover plate to prolong the service life, and belongs to the technical field of electric propulsion systems. Background technique [0002] Hall Effect Thruster (HET, Hall Effect Thruster) is an electric thruster that uses orthogonal electromagnetic fields to ionize and accelerate atomic working fluids, convert electrical energy into ion kinetic energy, and obtain higher specific impulse. It has the characteristics of simple structure, high specific impulse, high efficiency, long working life, high power density, long service time in orbit, etc. It is suitable for attitude control, orbit correction, orbit transfer, power compensation, position maintenance, Repositioning, off-orbit processing, space exploration and interstellar voyage and other tasks are currently the most widely used and most mature electric propulsion systems in the world. [0003] The inner m...

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Problems solved by technology

[0004]The purpose of the present invention is to solve the problem that the inner magnetic pole cover plate in the existing Hall thruster is susceptible to plasma erosion and loses its thermal protection effect, resulting in excessive temperature of the permanent magnet, which in turn causes Demagnetization phenomenon, which affects the life of the thruster, provides a permanent magnet Hall thruster with an inner magnetic pole cover plate to prolong its life

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