Device for establishing reference potential of detector in spatial plasma environment

Abstract

The invention discloses a device for establishing a reference potential of a detector in a spatial plasma environment, which is characterized in that the device comprises a conductor metal plate and afeedback circuit; the conductor metal plate is installed in an insulated manner on the outer surface of a spacecraft in the flight direction; and the feedback circuit is used for connecting the potential of the conductor metal plate to the ground potential of a detector, so as to insulate the detector from a spacecraft structure ground and a primary power ground and establish a reference potential equivalent to the potential of a measured plasma. The reference potential of the detector output by the device is approximately equal to the potential of a spatial plasma, which ensures that the ground potential of the detector varies uniformly with the change of the potential of the spatial plasma. In the process of in-situ measurement, there will be no interference to the measured plasma, anda correct scientific result can be obtained.

Description

technical field [0001] The invention relates to the aerospace field, in particular to a device and a method for establishing a detector reference potential in a space plasma environment. Background technique [0002] With the development of space environment detection, more and more space plasma in-place detectors are applied to spacecraft such as satellites. Since the on-site detection object of the space plasma detector is plasma with very low energy, it is required that the ground potential of the in-place detector itself must be close to the potential of the measured plasma in order to obtain correct scientific detection results. [0003] Space plasma detectors are installed on spacecraft such as satellites and space stations for on-orbit detection. However, the structure of the spacecraft is very complex and it is powered by a high-voltage solar cell array (such as +40V, +100V, etc.), so that in the space plasma environment, the spacecraft may be in a very low negative...

AI Technical Summary

Problems solved by technology

However, the structure of the spacecraft is very complex and it is powered by a high-voltage solar cell array (such as +40V, +100V, etc.), so that in the space plasma environment, the spacecraft may be in a very low negative potential relative to the space plasma. Potential (eg -40V, -100V, etc.)

Under this condition, if the detector takes the spacecraft potential as its ground potential, the potential is far away from the measured plasma potential, which will interfere with the measured plasma environment when the detector is in place for measurement, so that the detector cannot Efficiently obtain correct scientific detection results

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