Pulse plasma thruster plume ion velocity measuring device and method

Abstract

The invention provides a pulse plasma thruster plume ion velocity measuring device and method. The pulse plasma thruster plume ion velocity measuring device comprises a primary ion collecting electrode, a secondary ion collecting electrode, a shielding signal line and an oscilloscope. The primary ion collecting electrode and the secondary ion collecting electrode are spaced by a set distance, thecenters of the primary ion collecting electrode and the secondary ion collecting electrode are equal in height, and the primary ion collecting electrode and the secondary ion collecting electrode arearranged in parallel and are perpendicular to the center line of an ion beam flow; the transmittance of the primary ion collecting electrode is 50-60%, and plume ions penetrating through the primary ion collecting electrode are collected by the secondary ion collecting electrode; and the oscilloscope collects the pulse ion current signals on the shielding signal line outside the cabin, obtains thetime interval delta t of the pulse ion current signals collected by the secondary ion collecting electrode and the primary ion collecting electrode, and calculates the average speed of plume ions according to the set distance. The device is simple, convenient to operate and accurate in measurement.

Description

technical field [0001] The invention relates to the technical field of plasma thrusters, in particular to a pulse plasma thruster plume ion velocity measurement device and method. Background technique [0002] The pulsed plasma thruster has the characteristics of high specific impulse, small size, light weight, low power consumption, simple structure, low cost and long life, and can be widely used in micro-nano satellite position maintenance, drag compensation and attitude control. An important part of the research on the performance of the pulsed plasma thruster is to measure the ion velocity of the plume. Only when the ion velocity of the pulsed plasma thruster plume is determined, can the impulse, thrust, specific impulse, efficiency and thrust power of the thruster be determined. Compare. For steady-state plasmas, RPA and E×B probes can be used to measure ion energy or velocity, but for pulsed plasmas with a discharge duration of only a few hundred microseconds, laser-i...

AI Technical Summary

Problems solved by technology

For steady-state plasmas, RPA and E×B probes can be used to measure ion energy or velocity, but for pulsed plasmas with a discharge duration of only a few hundred microseconds, laser-induced fluorescence (Laser-Induced Fluorescence) can be used. Fluorescence, LIP) to indirectly measure ion velocity, the determination of LIP measurement is that the error is not easy to control, and the equipment is expensive

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