Afterglow detection device and afterglow detection method

Abstract

The invention discloses an afterglow detection device and an afterglow detection method. The afterglow detection device comprises an X-ray tube, a first reading circuit, a residual ray detector, a second reading circuit and a calculating device, wherein the first reading circuit is used for being connected with a detected detector, the detected detector is radiated by X-ray beams during detectingand outputs a first detection signal to the first reading circuit, and the first reading circuit generates and outputs a first measurement signal according to the first detection signal; the second reading circuit is connected with the residual ray detector, the residual ray detector is radiated by the X-ray beams and outputs a second detection signal to the second reading circuit, and the secondreading circuit generates and outputs a second measuring signal according to the second detection signal; the calculating device is in signal connection with the first reading circuit and the second reading circuit and calculates and outputs an afterglow detection signal according to the first measuring signal and the second measuring signal after the X-ray tube is powered off. The afterglow detection device and the afterglow detection method have the advantages of being simple, convenient and reliable.

Description

technical field [0001] The invention relates to the technical field of radiation inspection, in particular to an afterglow detection device and an afterglow detection method. Background technique [0002] Afterglow means that after the external excitation signal (such as ray beam or visible light, etc.) of the scintillation detector disappears, the scintillation detector will still maintain the emission of visible light for a period of time. The intensity of the afterglow decays approximately exponentially with time. [0003] Persistence is generally measured by the relative intensity value of a period of time after the external excitation signal disappears. For example, for a typical cesium (thallium) iodide (CsI(Tl)) scintillation detector, the output signal of the scintillation detector is unit 1 when an external excitation signal (such as an X-ray beam) exists, and 10ms after the excitation signal disappears The output signal of the scintillation detector is about 5000...

AI Technical Summary

Problems solved by technology

In order to block the residual X-rays in time, the heavy metal block needs to move at high speed and stand still as soon as possible, which requires a relatively large acceleration of the heavy metal block. Therefore, a more complex and costly control system and a mechanical system for adjusting the position of the heavy metal block are required

At present, due to the need to set heavy metal blocks, the use of X-ray tubes to detect the afterglow of scintillation detectors is only used in laboratories or production workshops, and it is difficult to use them in product sites

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