A method for measuring ion thruster beam current based on Faraday probe array

Abstract

The invention discloses an ion thruster beam current testing method based on a Faraday probe array, which can simultaneously realize the testing of the ion thruster beam current distribution, beam divergence angle, and thrust vector deflection angle. All probe test signals are collected synchronously, and the amount of data information is large. It usually only takes a few minutes to complete a complete test and data processing. There is a shielding jacket on the outside of the ion current collection plate of each Faraday probe, and the shielding jacket is directly connected to the disc-shaped metal bracket through metal contact to realize electrical connection, then only one wire can be used to supply bias to the disc-shaped metal bracket voltage, greatly reducing the number of probe leads. When calculating the beam divergence angle, the ion beam current density current value whose test current value is less than 5% of the average value is zero, so as to reduce the measurement error. The measuring point is located in the center of the small test area, and the beam current density measured at the measuring point is regarded as the average value of the beam current in the small area, thus simplifying the calculation.

Description

technical field [0001] The invention relates to the technical field of ion thruster beam testing, in particular to an ion thruster beam testing method based on a Faraday probe array, which can be used for testing ion thruster beam distribution, beam divergence angle, and thrust vector deflection angle. Background technique [0002] The ion thruster is the core unit of the ion propulsion system to generate thrust. In the development and testing of the ion thruster, it is necessary to test and analyze its beam distribution. By processing the beam distribution test data, the beam divergence angle, thruster Performance parameters such as vector deflection angle. [0003] The beam divergence angle is a parameter reflecting the ion optical system of the ion thruster. It is an important parameter of the thruster required in the spacecraft design, and is used for the layout design of the thruster on the spacecraft. [0004] The deflection angle of the thrust vector is mainly caused...

AI Technical Summary

Problems solved by technology

[0006] At present, there is no domestic test program for ion thruster beam divergence angle and thrust vector deflection angle at the same time

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