A High Count Rate Space Charged Particle Detector

Abstract

The invention relates to a high-counting-rate space charged particle detector. The detector comprises a collimator, a probe upper cover plate, a light shielding piece, a first sensor, a second sensor, a third sensor, a fourth sensor, a probe shell, and a probe shell bottom plate. The deposition energy [delta]E of charged particles in the first sensor is converted into a 6-bit binary code by using a digital pre-amplification circuit. The ranges Rs of the charged particles in the second sensor, the third sensor, and the fourth sensor are converted into 3-bit binary codes by using another three digital pre-amplification circuits. The row of a look-up table corresponds to the 6-bit binary code in correspondence with the energy [delta]E deposited in the first sensor. The columns of the look-up table correspond to the 3-bit binary codes in correspondence with the ranges Rs in the second sensor, the third sensor, and the fourth sensor. The binary codes are delivered to the look-up table in an electronics storage unit of the detector for matching. By virtue of matching, the energy E and the type of the space charged particles entering into the detector can be obtained.

Description

technical field [0001] The invention belongs to the technical field of space charged particle detection, in particular to a high count rate space charged particle detector. Background technique [0002] Space charged particles are one of the important components of the space environment, and they have an important influence on the activities of spacecraft. Since the beginning of space exploration activities, space charged particles have become one of the important contents of space exploration activities. With the development of the national economy, many spacecraft (such as navigation satellites, communication satellites, etc.) will operate in the earth's medium and high orbits to provide services for all aspects of social life. [0003] The characteristics of charged particles in middle and high orbital space are: charged particles have high energy and large flux. For example, electrons with an energy of 1.0 MeV have a flux of up to 9.4×10 5 p / cm 2 ·s. Since the medium-...

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Problems solved by technology

[0004] The traditional method of measuring charged particles in middle and high orbits using the energy loss-range method (ΔE-R method) uses an analog circuit to process the pulse signal generated by the charged particles in the detector to obtain the range information of the charged particles, which restricts the detector The response speed and reaction time of the electronics make it possible for these detectors to achieve a count rate usually not exceeding 10 5 counts / s, so it cannot meet the high count rate detection of charged particles in middle and high orbits

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