An Atmospheric Density Measurement System Based on X-ray Absorption

Abstract

The invention discloses an atmospheric density measurement system based on X-ray absorption, the system is located in a vacuum chamber (8), and the system includes: an X-ray source (1), an SDD detector (2), a high-precision coordinate instrument ( 3), the first X-ray shielding cover (4), the second X-ray shielding cover (5) and the controller and the data acquisition processing terminal (6); the SDD detector (2) is the same as the X-ray source (1) The axes are relatively placed; the X-ray source (1) is used to provide the X-ray light source required for measurement; the SDD detector (2) is used to receive X-ray energy spectrum counting, and perform energy calibration and quantum Efficiency calibration, dead time calibration, and divergence angle calibration to obtain calibrated X-ray energy spectrum counts; the controller and the data acquisition processing terminal (6) are used for counting and X-ray Poisson energy spectrum according to the calibrated X-ray energy spectrum Statistical maximum likelihood estimation, Bayesian estimation to obtain surface atmospheric density.

Description

technical field [0001] The invention relates to the technical field of space detection, in particular to an X-ray absorption-based atmospheric density measurement system. Background technique [0002] With the development of international aerospace technology, trans-atmospheric aerospace vehicles have developed rapidly in recent years. Trans-atmospheric aerospace vehicles are aircrafts whose flight altitude spans the entire atmosphere. Countries around the world have carried out extensive and in-depth research in this field. Research. Since the cruising altitude of the transatmospheric aerospace vehicle is within the entire atmosphere, the structural parameters of the middle and upper atmosphere have an important influence on the design, test and use of the transatmospheric aerospace vehicle. In particular, the density of the middle and upper layers of the thin atmosphere is of great significance to the aerodynamic and aerothermal design of transatmospheric aerospace vehicl...

AI Technical Summary

Problems solved by technology

[0003] Traditional atmospheric density measurement systems mainly include: lidar and in-situ detection; these detection methods can only achieve a measurement height of tens of kilometers; however, traditional atmospheric density measurement systems cannot completely cover trans-atmospheric aerospace vehicles The cruising altitude range cannot reach the altitude range of tens of kilometers to one hundred kilometers

Images