Plasma thruster plume parameter multi-point measurement device and measurement method

Abstract

The invention relates to a plasma thruster plume parameter multi-point measurement device and method, and the device comprises a vacuum chamber; the vacuum pump unit is connected with the vacuum cabin; the industrial control unit is connected with the vacuum pump unit and is used for providing and maintaining a vacuum environment of the vacuum cabin; and a measuring unit; the measuring unit comprises at least two three-dimensional moving platforms arranged in the vacuum cabin; the detection structure is arranged on the three-dimensional mobile platform; the acquisition unit is connected with the detection structure and is used for acquiring data; and the detection structure adopts a Langmuir probe, an RPA probe or a Faraday probe. According to the multi-point measurement device, the plasma measurement efficiency can be improved, plume multi-point symmetry can be continuously measured, the limitation of Langmuir probe use is broken through, error interference in a probe circuit is shielded, and meanwhile the multi-point measurement device is simple in structure, stable, reliable and high in practicability.

Description

technical field [0001] The invention relates to the field of aerospace, in particular to a multi-point measuring device and a measuring method for plume parameters of a plasma thruster. Background technique [0002] In recent years, the calibration technology of plasma generators in vacuum environment has gradually become a research hotspot in the field of plasma diagnosis. Researchers from home and abroad have tried to follow different technical routes to establish a set of plasma generator standard devices covering two types of microwave plasma and radio frequency plasma. The value traceability of various types of plasma generators such as inductively coupled plasma generators, microwave ECR plasma generators for orbital space plasma environment simulation, and arc thrusters and Hall thrusters for space electric propulsion. In the calibration technology research carried out in this process, Langmuir probe measuring devices with different application ranges are used as sta...

AI Technical Summary

Problems solved by technology

This traditional measurement method makes the test cycle very long and increases the test cost

[0004] In addition, in the prior art, when measuring the symmetry of the plasma thruster plume, the method adopted is to set multiple sets of symmetrical Langmuir probes in the plume area, but this method can only measure the The symmetry of the position of the probe cannot obtain the symmetry of the spatial connection, and the test effect is very unsatisfactory

[0005] At the same time, in the prior art, due to the presence of interference noise and discharge current when the Langmuir probe is used, the I-V curve will be distorted, and the measurement accuracy will be seriously affected.

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