Satellite difference potential measuring apparatus

Abstract

A satellite difference potential measuring apparatus comprises a collimator, an acceleration grid, a sensor, an electronics part and a housing. The acceleration grid comprises two layers which are respectively loaded with different high voltage so as to form a strong electric field in a cavity constituted by the two acceleration grid layers, and spatial electrons are accelerated after entering into the acceleration grid. The sensor comprises at least one semiconductor sensor, and when the spatial electrons enter the semiconductor sensor, electric signal pulses will be stimulated at electrodes at the two sides due to energy loss. The electronics part is used for processing an electric signal provided by the sensor so as to provide a signal reflecting the energy deposition of the spatial electrons in the sensor, obtaining energy of the spatial electrons through analysis, measuring an energy spectrum of the spatial electrons entering the measuring apparatus, and obtaining the a satellite difference potential value according to an energy point where the peak of the measured energy spectrum of the spatial electrons is located.

Description

technical field [0001] The invention relates to the field of satellite protection, in particular to a measuring device for satellite differential potential of medium and high orbit satellites. Background technique [0002] Due to the attachment of space plasma, the surface of the satellite will form a surface charge similar to the electrostatic charge on the ground. The surface charge will cause a potential difference between the satellite and the space environment, which is the floating potential of the satellite surface. When there is an excessive potential difference between the surface of the satellite and the space environment, for example, a satellite in geostationary orbit can cause a high voltage of negative 20,000 volts, which will cause excessive potential difference between the surface of the satellite and the space environment or between different parts of the surface. If it is too large, there will be a discharge phenomenon (ie, electrostatic discharge on the gr...

AI Technical Summary

Problems solved by technology

Relatively speaking, the Langmuir probe method has high measurement accuracy, but the potential range that can be measured is narrow; the measurement principle of the capacitive voltage divider method is simple and the structure is simple, but the capacitive voltage divider method measures the sample instead of the satellite skin surface; The measurement principle of the analyzer method is clear and the technology is mature, but the structure is relatively complicated

Images