A plasma thruster steady-state ion flow field measurement device and measurement method

Abstract

Embodiments of the present invention provide a plasma thruster steady-state ion flow field measurement device and measurement method, which belong to the technical field of steady-state ion flow field measurement. The device includes a measurement module, a power module and a probe assembly. The probe assembly includes a probe, a probe bracket and an electric turntable. The probe includes an insulating shell, an ion receiving electrode, an incident grid and an outgoing grid. One end of the insulating shell is open, and the incident The grid is located at the opening of the insulating housing, the exit grid is located in the middle of the inner cavity of the insulating housing, and the ion receiving electrode is located in a section of the inner cavity of the insulating housing away from the incident grid. , The incident grid and the outgoing grid are insulated from each other, the insulating shell is fixed on the probe bracket, and the electric turntable is used to drive the probe bracket to rotate around the incident hole of the incident grid. The rotation of the probe of the device around the measuring point can obtain the distribution function of the ion current density at each azimuth angle at the measuring point, and at the same time obtain the vector angle of the ion velocity.

Description

technical field [0001] The invention relates to the technical field of steady-state ion flow field measurement, and in particular provides a plasma thruster steady-state ion flow field measurement device and a measurement method. Background technique [0002] The Hall thruster is a very typical plasma electric propulsion device in the international field. Plasma thrusters rely on high-speed plasma plumes to generate reaction thrust, and their working efficiency depends on the distribution characteristics of the steady-state ion flow field in the plume region. Therefore, obtaining the steady-state ion flow field distribution in the plume region is of great significance for the optimization of thruster performance. [0003] Due to the complex ionization acceleration process of the plasma thruster, the ion flow field in the plume region has a very complex spatial structure. In this ion flow field, obtaining the ion current density distribution and its velocity vector angle at...

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Problems solved by technology

The patent documents of Chinese patents CN105116435A and CN105116436A disclose the method of synchronous measurement of the ion flow field using the Faraday probe array, and the Faraday probe used in it adopts a conventional probe structure design, so the vector angular distribution of the ion velocity cannot be obtained

In the document "Magnetically filtered faraday probe for measuring the ion current density profile of ahall thruster", the Faraday probe can only be used to measure the ion current density of the thruster, but cannot obtain the vector angle of the ion velocity

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