A method for automatic adjustment of reverse bias voltage of spaceborne si-apd detector

Abstract

The invention discloses a spaceborne Si-APD detector reverse bias voltage automatic regulation device and method. The device comprises an FPGA, a temperature sensor, a digital potentiometer, a high voltage power supply module and multiple Si-APD detector modules including S1, S2......and Sn. All the Si-APD detector modules are completely identical in composition, and each Si-APD detector module is composed of a slide rheostat Radj, a resistor R1, a resistor R2, a capacitor C1 and a Si-APD (silicon avalanche diode) detector. The bias voltage range of each Si-APD detector is measured and determined in the experiment environment before normal working, and a fitting curve that the reverse bias voltage changes along with temperature is solved. The voltage sharing coefficient of the slide rheostat and the feedback value of changing along with temperature of the digital potentiometer are calculated according to the fitting curve. The problems caused by different bias voltage requirements caused by technology, manufacturing and other factors of the same type detector can be solved so that lightweighting and miniaturization of the spaceborne Si-APD detector reverse bias voltage automatic regulation device can be realized.

Description

technical field [0001] The present invention relates to the technical field of X-ray pulsar single-particle detection, in particular to a space-borne Si-APD detector reverse bias automatic adjustment device and method, which is applied to space X-ray pulsar single-particle detector reverse bias adjust. Background technique [0002] In the field of deep space exploration, the X-rays emitted by neutron stars serve as a stable benchmark and can be used as a navigation reference. Since the spectral energy after reaching low-Earth orbit is only on the order of single photons, there are many methods for capturing X-ray single particles, such as proportional counters, electron multiplying CCDs (EMCCDs), and semiconductor detectors. [0003] The operating voltage of silicon avalanche diode (Si-APD) detector is the key to its normal operation. When the voltage is too large, the avalanche caused by the thermal noise inside the Si-APD will cause the Si-APD to continuously output puls...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a device and method for automatically adjusting the reverse bias voltage of a space-borne Si-APD detector, and solve the different bias voltages caused by factors such as technology and manufacturing of the same type of detectors. The problems brought about by the demand, so as to realize the light weight and miniaturization of the reverse bias automatic adjustment device of the spaceborne Si-APD detector

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