Radiation dose measuring method and device

Abstract

The invention discloses a radiation dose measuring method and device, wherein the method comprises the steps of enabling a ray to respectively act with the probes of two optical fibers which are arranged side by side and are different in length, and generating the first Cherenkov radiation and the second Cherenkov radiation; transmitting a radiation signal to a sensor by the optical fibers; converting an optical signal into an electric signal and a digital signal in sequence; subtracting the digital signal of the first Cherenkov radiation from the digital signal of the second Cherenkov radiation by a computer to obtain a signal of a measurement area; and measuring the radiation dose according to the relationship between the Cherenkov radiation signal and the radiation dose. According to the invention, the rapid, accurate and real-time measurement of the radiation dose is realized, and the method and the device have an important value for the nuclear technology application, especially the medical application.

Description

technical field [0001] The invention relates to the field of nuclear radiation detection, in particular to a radiation dose measurement method and device. Background technique [0002] At present, many researches have been done on radiation dose measurement methods at home and abroad, and the more commonly used ones include ionization chambers, thermoluminescent dosimeters and scintillator fiber optic dosimeters. When using an ionization chamber to measure radiation dose, it is necessary to avoid the angular response dependence of the ionization chamber, and it is necessary to perform complex corrections on the readings to achieve dose measurement, which is a cumbersome process. Thermoluminescent dosimeters need to be calibrated before use. The calibration and readout process is cumbersome and depends on heat sources. It cannot read data in real time, and can only measure dose at the sub-centimeter level, with low spatial resolution. The scintillation crystal in the scintil...

AI Technical Summary

Problems solved by technology

When using an ionization chamber to measure radiation dose, it is necessary to avoid the angular response dependence of the ionization chamber, and it is necessary to perform complex corrections on the readings to achieve dose measurement, which is a cumbersome process

Thermoluminescent dosimeters need to be calibrated before use. The calibration and readout process is cumbersome and depends on heat sources. It cannot read data in real time, and can only measure dose at the sub-centimeter level, with low spatial resolution.

The scintillation crystal in the scintillator fiber optic dosimeter has a quenching effect at high temperature and high ionization density, and the signal output through the fiber contains Cerenkov noise signals, which affects the accuracy of the scintillator fiber optic dosimeter measurement and limits its use. Applications of Radiation Dosimetry

None of these methods and devices can realize rapid, accurate and real-time measurement of radiation dose

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