Cusped magnetic field plasma thruster

Abstract

The invention relates to a cusped magnetic field plasma thruster. The problems that gas working media cannot be sufficiently ionized on a channel wall face, and an air gap between a magnet outer walland a ceramic channel inner wall is slow in cooling can be solved. In order to solve the problems, the thruster comprises an ionization channel, permanent magnets, an anode, a hollow cathode, a magnetic conductive ring, a positioning ring and a shell, the side wall longitudinal section of the side, along the ionization channel, of each permanent magnet is in a right-angle trapezoid or rectangle, the inner diameter of the ionization channel in the direction from the bottom of the channel to an outlet is increased sequentially in a discrete ladder manner, the structure is adopted to enable electronics which do reciprocating motion at the high speed between two magnetic tip ends to be sufficiently ionized, and the technical effect that the gas working media are high in use rate can be achieved. A heat exchange device is mounted on the thruster, the temperature of the air gap between the magnet outer wall and the ceramic channel inner wall can be reduced, the paramagnetic phenomenon causedby too high temperature of the permanent magnets can be avoided, and the service life of the thruster can be prolonged.

Description

technical field [0001] The invention relates to the technical field of tangent magnetic field plasma propulsion, in particular to a tangent magnetic field plasma thruster with a special cross-sectional channel. Background technique [0002] This application is a divisional application, and the parent application number is CN 201910119891.5. [0003] The tangential magnetic field plasma thruster is an advanced electric propulsion device, which is widely used in the field of satellite position maintenance and attitude control, and is known as the first choice for future space vehicles due to its simple structure, high specific impulse, and high efficiency. One of the propulsion devices. [0004] When electrons are emitted from the cathode at the exit of the channel and move toward the anode along the channel axis, due to the magnetic confinement and the magnetic mirror effect of the magnetic tip, it is difficult for the electrons to reach the straight channel wall in the tang...

AI Technical Summary

Problems solved by technology

[0006] The invention mainly aims to solve the technical problems that the gas working medium cannot be fully ionized at the wall of the channel, and the air gap between the outer wall of the magnet and the inner wall of the ceramic channel is slow to dissipate heat

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