Integrated high-efficiency ionization ultrahigh specific impulse radio frequency ion thruster discharge structure

Abstract

The invention discloses an integrated efficient ionization ultrahigh specific impulse radio frequency ion thruster discharge structure which comprises a screen grid, a screen grid installation ring, a ceramic discharge chamber, a ceramic installation ring, a coil insulation support, a rear shell, a gas working medium pipeline, a plurality of radio frequency coils, a metal gas circuit connector, an ultrahigh pressure gas circuit insulator, an insulator fixing ring and a rear cover. According to the invention, the radio frequency coil is fixed through the coil insulating bracket, so that uniform coupling of radio frequency energy can be realized; the gas working medium channel enables gas to uniformly enter the cylindrical discharge chamber from all directions, ionization efficiency is high, the gas working medium channel is convenient to clean, the metal gas circuit connector is good in fixing effect by adopting a brazing mode, the ultrahigh-pressure gas circuit insulator is connected with the metal gas circuit connector by adopting a ball head, connection is reliable, connection strength is high, and disassembly, assembly and maintenance are convenient. The rear cover and the insulator fixing ring are spliced, so that the large-size ultrahigh-pressure gas circuit insulator can be fixed, and the size and the weight of the whole thruster can be reduced.

Description

technical field [0001] The invention relates to the technical field of aerospace electric propulsion, in particular to an integrated high-efficiency ionization ultra-high specific impulse radio frequency ion thruster discharge structure. Background technique [0002] Ultra-high specific impulse RF ion thruster is a new type of electric propulsion technology that combines dual-stage quad-grid electrostatic acceleration technology with inductive coupled discharge technology. It is suitable for technical features such as multiple working fluids. It can meet the space exploration tasks that require long-term flight, such as asteroid detection and ultra-deep space exploration. To achieve the performance of ultra-high specific impulse, it is necessary to apply a higher voltage (>8000V) to the screen grid. The existing RF ion source technology is in the aspects of ultra-high voltage insulation, gas circuit structure, discharge chamber configuration, coil fixing structure, etc. ...

AI Technical Summary

Problems solved by technology

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the inability of the RF ion source technology in the prior art to meet the requirements of the ultra-high specific impulse RF ion thruster in terms of ultra-high voltage insulation, gas circuit structure, discharge chamber configuration, and coil fixing structure. Requirements, so as to provide an integrated high-efficiency ionization ultra-high specific impulse radio frequency ion thruster discharge structure

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