Double-section coaxial toothed cathode pulse plasma thruster

Abstract

The invention discloses a double-section coaxial toothed cathode pulse plasma thruster, and belongs to the technical field of micro satellite aerospace propulsion. The product mainly comprises a first-stage cathode, a first-stage anode, an insulating coating layer, a second-stage cathode, a second-stage anode, a propellant, an insulating outer shell, an insulating base, a supply spring and a spark plug. The inner surface of the primary cathode is provided with sharp teeth, so that the primary cathode is easier to discharge compared with a common cylindrical inner surface by utilizing a point discharge principle, and the system safety is improved; and the toothed cathode is used, so that the electric field and the current between the electrodes are more uniform, the non-uniform ablation of the propellant is improved, the indentation of the end face of the solid propellant in the continuous working process is reduced, the reliability is remarkably improved, and the working life is prolonged. The secondary cathode is in the shape of an expanded spray pipe, so that charged particles and neutral gas generated by discharging between the primary electrodes are accelerated more sufficiently, and the primary electrodes and the secondary electrodes are charged by respective independent capacitors, so that the reasonability of energy distribution is improved, and the overall acceleration efficiency of the thruster is improved.

Description

technical field [0001] The invention relates to a double-segment coaxial toothed cathode pulse plasma thruster, which belongs to the field of micro-satellite space propulsion technology Background technique [0002] In recent years, with the rapid development of aerospace technology, microsatellites and electric propulsion technology have made great progress. At present, domestic and foreign attach great importance to the development and application of micro-satellites, and the number of space launches is increasing year by year. Microsatellites have the advantages of small size, low weight, low cost, short development cycle, and flexible launch, and can form a satellite constellation with several microsatellites. Through the coordination between satellites, they can be competent for tasks such as communication, remote sensing, and earth observation. . Due to the characteristics and mission requirements of the microsatellite itself, its propulsion system needs to meet the ...

AI Technical Summary

Problems solved by technology

However, with the continuous development of electric propulsion technology, the shortcomings of the traditional configuration of pulsed plasma thrusters, such as low working efficiency, low thrust level, and high failure rate compared with other types of electric propulsion thrusters, have gradually emerged.

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