Cylindrical probe used for plume measurement of magnetic plasma thrustor

Abstract

The invention discloses a cylindrical probe used for plume measurement of a magnetic plasma thrustor. The cylindrical probe includes single probe modules, a four-hole ceramic tube and a Langmuir probe protection tube module. The single probe module includes a thick single-hole ceramic tube, a thin single-hole ceramic tube and a tungsten filament. One end of the thin single-hole ceramic tube and one end of the thick single-hole ceramic tube are flush to each other and are fixed to each other. The tungsten filament is inserted to the thin single-hole ceramic tube. An end face of the four-hole ceramic tube is provided with four through holes. Three identical single probe modules are inserted into three of the four through holes. The Langmuir probe protection tube module includes a protection tube, a flat gasket, a fastening screw, a nut and a spring gasket. The four-hole ceramic tube with the fixed single probe modules is inserted from the protection tube and gets fixed. The cylindrical probe provided by the invention has advantages that the four-hole ceramic tube, the thick single-hole ceramic tube, the thin single-hole ceramic tube and the tungsten filament made of aluminum oxide which is common in market can bear plume temperature of the magnetic plasma thrustor; structural stability can be kept through clearance fit; and the cylindrical probe is simple in structure.

Description

technical field [0001] The invention belongs to the field of electric propulsion plasma measurement, in particular to a cylindrical probe used for plume measurement of a magnetic plasma thruster. Background technique [0002] Electric propulsion is a kind of advanced propulsion method that uses electric energy to directly heat the propellant or ionizes and accelerates the propellant by electromagnetic action to obtain propulsion power. It has high specific impulse, thrust and efficiency, especially the magnetoplasma thruster has high specific impulse The advantages of high thrust, high efficiency and high efficiency have broad application prospects in space missions such as orbit control of large spacecraft, deep space exploration and interstellar navigation. [0003] The measurement of the relevant parameters of the plume plasma of the magnetoplasma thruster is of great significance for optimizing the engine design and improving the engine performance. The method of measur...

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Problems solved by technology

[0004] The present invention aims at the shortcomings of existing probes that cannot realize the fixed-point measurement of the plume plasma of the magnetic plasma thruster, and at the same time cannot withstand the high temperature and sputtering of the plume of the magnetic plasma thruster, and proposes a method for Cylindrical probe for magnetoplasma thruster plume measurement to measure electron temperature and electron number density of magnetoplasma thruster plume

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