Low-pollution spatial medium-energy electron detector based on magnetic deflection technique

Abstract

The invention relates to a low-pollution spatial medium-energy electron detector based on the magnetic deflection technique. The detector comprises a probe and an electronics box; the probe is used for collecting medium-energy electrons in space to obtain a voltage pulse signal; the electronics box is used for performing amplitude analysis on the voltage pulse signal to determine the energy path of the medium-energy electrons; the probe comprises a particle collimator, a permanent magnetic deflection structure, a one-dimensional position sensitive sensor, a charge sensitive preamplifier and a shielding housing; externally incident particle swarms are limited to be a narrow beam by the particle collimator after incidence from the particle collimator and then pass through a magnetic field formed by the permanent magnetic deflection structure, at this time, the medium-energy electrons in the particle swarms deflect obviously, the deflected medium-energy electrons are emitted into the obliquely installed one-dimensional position sensitive sensor, the medium-energy electrons produce energy deposition on the one-dimensional position sensitive sensor to form electron-hole pairs, and the electron-hole pairs drift towards two poles under the action of the applied electric field and are collected and converted into the voltage pulse signal through the charge sensitive preamplifier.

Description

technical field [0001] The invention relates to the field of space particle measurement, in particular to a low-pollution space mid-energy electron detector based on magnetic deflection technology. Background technique [0002] With the development of my country's aerospace industry, the measurement of space particle radiation environment is becoming more and more important. The charged particles in space can theoretically be divided into three categories: high energy, medium energy and low energy. Intermediate-energy electrons refer to electrons with energies ranging from tens of keV to hundreds of MeV, between high and low energies. [0003] Medium-energy electrons are extremely sensitive to disturbances in the space environment and are related to many space physical phenomena. At the same time, medium-energy electrons are also the main cause of high charging potential on the satellite surface. Therefore, the measurement of medium-energy electrons is guaranteed by space p...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defect that the measurement of medium-energy electrons is prone to cause errors in the prior art, thereby providing a detector that can effectively improve the accuracy of the measurement of medium-energy electrons

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