Method for calibrating detection efficiency of detector based on radiation source on-orbit calibration system

Abstract

The invention discloses a method for calibrating the detection efficiency of a detector based on a radiation source on-orbit calibration system. The system comprises a ground control system, a satellite-borne central controller, a photon counter, the detector, a detector vacuum and temperature control system, a rotary table, a vacuum door, a radiation source, and a radiation source vacuum and temperature control system. The method achieves the noise detection of system equipment before and after the opening of the vacuum door and before the starting of the radiation source, and employs the rotary table to adjust the detection direction of the detector, thereby achieving the detection of the radiation source, and achieving the detection of the azimuth of a Crab source and detection angles with different pitching. The method can obtain high-reliability noise testing data, achieves the omnibearing noise testing and analysis of the detector, and completes the calibration of the detection efficiency of the detector through the reverse deduction of a noise source with the help of measurement data.

Description

technical field [0001] The invention relates to the technical field of aerospace X-ray detection, in particular to a method for calibrating the detection efficiency of a detector based on an on-orbit calibration system of a ray source. Background technique [0002] At present, many X-ray detectors carried by satellites can detect targets, but the data detected by X-ray detectors are unreliable or have very low reliability. There are many factors causing this problem. There are two main points: (1) After the launch of the spacecraft, the equipment and instruments carried by it have undergone great mechanical, thermal and chemical shocks, and it is impossible to confirm whether the equipment is operating normally; (2) The in-orbit operation It is usually the first time that the equipment experiences full-band irradiation and the interference of various particle flows, and it is impossible to know whether the collected data is reliable. In order to solve this problem, an in-or...

AI Technical Summary

Problems solved by technology

However, in the prior art, the X-ray detectors are only calibrated and tested on the ground, and are directly detected without on-orbit calibration and testing, so the reliability of the detected data is very low

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