Ion thruster plasma parameter diagnosis electrostatic probe positioning system and positioning method

Abstract

The invention discloses an ion thruster plasma parameter diagnosis electrostatic probe positioning system and positioning method. The objective of the invention is to solve the problem of incapability of positioning an electrostatic probe and the burnout of the probe due to long-term lingering in a plasma loop in a discharge chamber. The system includes a metal box, a linear motor, a probe mounting rod, ball screws and stainless steel guide rails; the ball screws and the stainless steel guide rails are located at the bottom of the metal box; the linear motor is installed in the metal box; the probe mounting rod is connected with the linear motor; and the tail end of the probe mounting rod is provided with an electrostatic probe. According to the positioning system, the probe can be positioned to a designated position in the discharge chamber, and the static probe can be positioned comprehensively, accurately and fast. With the positioning system and positioning method of the invention adopted, the static probe can be positioned both in a radial direction and an axial direction; since the discharge chamber is distributed in a cylindrical symmetric manner, the probe can be positioned to diagnostic positions of interest; and the safety of the probe can be ensured, and the probe can be prevented from being burned in a plasma environment.

Description

technical field [0001] The invention belongs to the field of spacecraft propulsion, and in particular relates to an electrostatic probe positioning system for ion thruster plasma parameter diagnosis. Background technique [0002] Ion thrusters are increasingly becoming an important propulsion device for spacecraft. The diagnosis of plasma parameters in the ion thruster discharge chamber is of great significance. The plasma distribution in the discharge chamber in a steady state determines many important aspects of the performance of the thruster, and the movement of the plasma is the result of the combined action of the electromagnetic field. The potential distribution of is of great significance. It helps to deepen the understanding of the discharge process. The measured data is sometimes used as the input of the numerical model, and the experimental diagnostic data is also an important test for various numerical models and analysis models. Electrostatic probe diagnosis i...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an ion thruster plasma parameter diagnosis electrostatic probe positioning system to solve the problem that the electrostatic probe cannot be positioned and the probe will be burned if the time is too long in the plasma ring in the discharge chamber

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