Carbon nanotube gas field ionization thruster of double-grid structure

Abstract

The invention discloses a carbon nanotube gas field ionization thruster of a double-grid structure, and belongs to the technical field of space propulsion. The carbon nanotube gas field ionization thruster is mainly composed of a gas diffusion chamber, an ionization chamber and a secondary acceleration chamber. The gas diffusion chamber comprises a ventilation base, a first isolation layer, an emitting electrode base, a carbon nanotube emitting electrode and emitting electrode cold pressing wiring terminals. Gas enters the gas diffusion chamber through the ventilation base to finish diffusion; and a gas working medium enters the ionization chamber through a vent hole in the carbon nanotube emitting electrode, and gas ionization and one-time acceleration are achieved in the ionization chamber by powering up the emitting electrode cold pressing wiring terminals and an extraction grid cold pressing wiring terminal. Ionized gas ions enter the secondary acceleration chamber through a gas hole of an extraction grid, the ions subjected to secondary acceleration are sprayed out through a gas hole of an acceleration grid by powering on the extraction grid cold pressing wiring terminal and an acceleration grid cold pressing wiring terminal, and control of the particle speed is met by changing the potential difference between the extraction grid and the acceleration grid of the secondary acceleration chamber.

Description

technical field [0001] The invention relates to a carbon nanotube gas field ionization thruster with a double grid structure, belonging to the field of space propulsion technology. Background technique [0002] The micro-thruster based on carbon nanotube field ionization is a new concept of micro-electric thruster, which is mainly used in the fine attitude control and position maintenance of space micro-nano satellites. The thruster uses the high aspect ratio of carbon nanotubes on the emitter and the array structure to generate high field strength to realize the ionization of the gas working medium, and accelerates the ejection under the action of the electric field to generate thrust. [0003] As mentioned in the invention patent CN113027717A, a micro thruster based on carbon nanotube microhole array electrodes uses cold-pressed terminals and terminals for electrical connection, the size of the conductive ring terminal is too long, the structure is unstable, and this This...

AI Technical Summary

Problems solved by technology

[0004] The structure and layout of the existing technical schemes all use a single gate structure, which can realize the ionization and acceleration of the working fluid at the same time, but the speed of the extracted ions can only be changed by the potential difference between the gate and the emitter, and the adjustable range smaller

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