Measuring device for electric propulsion plume deposition effect based on magnetic deflection

Abstract

The present invention discloses an electric propulsion plume deposition effect measurement device based on magnetic deflection. The device comprises a QCM pollution measurement sensor, an N-pole magnet and an S-pole magnet, a QCM installation support, a front damper support and two side support plates, wherein three sets of the arranged parts in parallel are mutually connected to form a closed measurement chamber. The QCM pollution measurement sensor is arranged on the installation support, the two magnets are distributed at the upper portion and the lower portion of a measurement chamber, themiddle portion of the front damper support is provided with a measurement limitation hole, the size of the hole is determined by measurement of an effective area and an intersection point of a measured thruster field connection line and the front damper plate through the QCM to ensure that deposition pollutants from the incoming flow of the thruster are deflected to outwards under the action of amagnetic field after charged particles pass through the measurement limitation hole, the magnetic field does not change the energy of the particles, and the particles are bombarded on the right-sidesupport plate. The electric propulsion plume deposition effect measurement device can effectively filter the sputtering effect of backflowed CEX ions to the test materials and cannot increase the energy of the CEX by employing magnetic deflection, graphite anti-sputtering materials are installed at the right-side support plate so as to greatly reduce the influence of secondary sputtering on pollution measurement.

Description

technical field [0001] The invention relates to a magnetic deflection-based electric propulsion plume deposition effect measuring device, which belongs to the technical field of electric propulsion plume pollution effect measurement, in particular to an experimental measurement device for measuring the electric propulsion plume deposition pollution distribution. Background technique [0002] The electric propulsion plume will cause force, heat, sputtering, deposition pollution, charge and discharge and other effects on the spacecraft. Among them, the deposition pollution effect mainly refers to the decrease in solar power caused by the deposition of the sputtering products of the electric thruster itself (the grid Mo of the ion thruster, the discharge channel BN of the Hall thruster) on optical instruments such as solar cells and optical lenses. , lens blur and a series of problems. Studies have shown that the deposition thickness of only a few angmi will have a serious imp...

AI Technical Summary

Problems solved by technology

At present, the measurement of pollution distribution at home and abroad generally adopts the method of adding sleeves to shield the influence of interfering pollutants on the experimental results, but the sleeves cannot affect the incoming high-speed ions, and the high-speed ions in this part are still It will cause sputtering on the test substrate (glass sheet or QCM, etc.) and the pollutants deposited on it, seriously affecting the accuracy of the experimental results

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