In situ measurement system and method of ccd saturation signal after gamma ray irradiation

Abstract

The invention provides an in-situ measurement system and method for a CCD saturation signal after γ-ray irradiation, which can effectively reduce the complexity of the existing measurement system and the danger of experimenters when carrying out γ-ray irradiation experiments. , to improve the experimental efficiency; at the same time, the system and method can obtain the saturated signal parameters in a short time after the irradiation is completed, which is useful for the study of CCD 60 Provide technical support for testing the total dose effect of Coγ-ray irradiation. The in-situ measurement system includes a light source unit, a radiation source unit, a CCD irradiation unit, a signal processing unit and a host computer; the radiation source unit is used to induce ionization damage to the CCD irradiation unit; the light source unit is used to provide uniformity to the CCD irradiation unit The light source makes it reach a saturated working state; the signal processing unit is used to collect the image data of the CCD irradiation unit, and wirelessly transmit the image data to the host computer over a long distance; the host computer receives the image data and processes it to obtain a saturated signal change curve.

Description

technical field [0001] The invention relates to the field of radiation effect testing, in particular to an in-situ measurement system and method for the saturation signal of a charge-coupled device after γ-ray irradiation. Background technique [0002] A charge coupled device (CCD) is a solid-state photoelectric conversion image sensor with a MOS structure. It uses charges as a signal to form a transfer barrier under the oxide layer through the gate voltage, and transfers the photogenerated charges in the depletion layer. It is transferred to the output amplifier to output electrical signals, and has functions such as imaging, signal processing, and communication. Due to the advantages of low noise, light weight, wide dynamic range, stable operation and high quantum efficiency, charge-coupled devices are widely used in the fields of earth remote sensing, telemetry and space science detection. However, CCD will be affected by ionization damage in space radiation or nuclear r...

AI Technical Summary

Problems solved by technology

At present, due to the limited transmission distance of common transmission methods such as USB and IEEE1394, most 60 The extraction of saturation signal parameters in Coγ-ray irradiation experiments is all displacement measurement, that is, after the radiation dose has accumulated to a certain dose point, the device needs to be lowered and taken out, and put in again after the test is completed, which brings great inconvenience to the irradiation experiment. And it is impossible to obtain the changing law of the saturation signal in a short time after the irradiation is completed

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