A Colloid Thruster Based on Microwave Enhancement

Abstract

The invention provides a microwave-enhanced colloid thruster, comprising: an extraction pole, an emitter needle tube and a bottom plate, the emitter needle tube penetrates and is fixed in the center of the bottom plate and is located above the bottom plate, the extraction pole is located above the emitter needle tube, and the field emission The thruster also includes: casing, resonant cavity shell, microwave feed cable and SMA microwave input interface, the extractor, resonant cavity shell and bottom plate are covered sequentially from top to bottom to form a cylindrical cavity, and the emitter needle tube is located in the resonant cavity shell The shaft center and the sleeve are placed outside the emitter needle tube. The microwave feed cable enters the resonator shell through the SMA microwave input interface and connects with the lower end of the sleeve. The height of the resonator shell is 1 / 4 of the wavelength of the fed microwave First, the inner diameter of the shell of the resonant cavity is less than half of the wavelength of the fed microwave. The invention greatly reduces the field emission voltage of the colloid thruster; at the same time, it can realize higher specific impulse.

Description

technical field [0001] The invention relates to a thruster, in particular to a colloidal thruster based on microwave enhancement. Background technique [0002] Electric propulsion systems have been widely used and developed in current space missions due to their specific impulse, efficiency, and lifespan that are much higher than traditional chemical propulsion systems. With the development of micro-satellites, new-generation space science experiments, and space telescopes, the demand for micro-electric thrusters is increasing day by day. However, due to the performance limitations and high-voltage power supply requirements of the most common micro-neutral thrusters in the world - field emission thrusters, colloid thrusters and cold air thrusters, the design of new micro thrusters has potential It must be done. [0003] The colloid thruster is an earlier electric thruster in the world. It has the advantages of simple principle, low structural complexity, easy miniaturizati...

AI Technical Summary

Problems solved by technology

[0004] At present, even the colloidal thruster with a tip size of several tens of microns often has an output voltage as high as 1000V or more, which puts forward very strict requirements on the power supply equipment of the propulsion system; at the same time, the performance of the colloidal thruster is seriously affected by the industrial The influence of mass flow rate, when the flow rate increases, the proportion of ions in the plume components induced by the electric field will decrease significantly, and a large number of charged droplet jets will appear, resulting in a decrease in specific impulse

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