A Magnetoplasma Thruster with Conical Porous Hollow Cathode

Abstract

The invention discloses a magnetic plasma thruster provided with a conical porous hollow cathode and belongs to the electric propulsion field. The magnetic plasma thruster provided with the conical porous hollow cathode is of a cylindrical structure as a whole. The exterior of the magnetic plasma thruster provided with the conical porous hollow cathode sequentially comprises a middle connection piece, an anode connection piece and an anode from left to right. The anode connection piece is connected with the anode and the middle connection piece at the same time. The interior of the magnetic plasma thruster provided with the conical porous hollow cathode sequentially comprises a second cathode connection piece, a first cathode connection piece, an insulator and the cathode from left to right, and the second cathode connection piece, the first cathode connection piece, the insulator and the cathode are coaxially matched; the second cathode connection piece is provided with the first cathode connection piece in a matched manner in the radial direction; the insulator is arranged in the anode connection piece in a clamped and sleeved manner; the cathode is clamped to the insulator and the conical face of the first cathode connection piece; and the conical face of the cathode and the conical face of the first cathode connection piece are closely matched through a 5-degree conical angle. The magnetic plasma thruster provided with the conical porous hollow cathode has the beneficial effects that the cathode is wrapped in the cathode connection pieces, the second cathode connection piece tightly presses the tail portion of the cathode, it is guaranteed sufficient pressing force exists on the cathode, and the situation that the cathode becomes less crowded because of thermal expansion is prevented; and a porous structure is adopted for the head portion of the cathode, a larger current emitting area is achieved, and the current emitting capacity is improved.

Description

technical field [0001] The invention belongs to the field of electric propulsion, and is an electric thruster; specifically, it is a magnetic plasma thruster with a conical porous hollow cathode. Background technique [0002] The magnetoplasma power thruster is a kind of electric thruster, which belongs to the electromagnetic acceleration type according to the acceleration mechanism. Its advantages are high specific impulse, large thrust, and easy realization of high power. However, the working principle of the magnetoplasma thruster is more complicated than that of other electric thrusters, and the design is more difficult. [0003] A core component of a magnetoplasmadynamic thruster is the cathode, whose main function is to emit electrons, ionize the propellant, and generate plasma. Therefore, the current emission capability of the cathode is an important indicator to measure its performance. The common material for the cathode of a magnetoplasma thruster is high-tempera...

AI Technical Summary

Problems solved by technology

If its structural design is unreasonable, it is likely to cause structural damage or change due to high temperature, which will affect the work of the thruster

Images