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Double-channel counting system and measurement method of dose equivalent in high dose condition

A dual-channel, counting value technology, applied in the field of ionizing radiation testing, to achieve accurate measurement of high doses, low hardware cost, and simple structure

Active Publication Date: 2015-06-03
中国测试技术研究院辐射研究所
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a dual-channel counting system and a method for measuring dose equivalent under high dose conditions, so as to solve the problem of measuring dose equivalent under high dose conditions with the average effective energy of the radiation field in the range of 48keV~1.25MeV

Method used

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  • Double-channel counting system and measurement method of dose equivalent in high dose condition
  • Double-channel counting system and measurement method of dose equivalent in high dose condition

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Embodiment 1

[0046] In Embodiment 1, the input end of the charge-sensitive amplifier circuit is connected to the semiconductor detector D1, and its output end is respectively connected to the input end of the first pulse shaping circuit and the input end of the second pulse shaping circuit; the input end of the first comparator U4 Terminal a is connected to the output terminal of the first pulse shaping circuit, the input terminal b of the first comparator U4 is connected to the first threshold voltage signal source, and the input terminal c of the second comparator U5 is connected to the output terminal of the second pulse shaping circuit , the input terminal d of the second comparator U5 is connected to the second threshold voltage signal source, the voltage value of the first threshold signal source is not equal to the voltage value of the second threshold signal source, specifically, the voltage of the first threshold voltage signal source The ratio of the value to the voltage value of ...

Embodiment 2

[0051] Embodiment 2 provides a method for measuring dose equivalent under high-dose conditions, the method comprising:

[0052] Step 1: Initialize the dual-channel counting system.

[0053] Specifically, the dual-channel counting system provided in Embodiment 1 is initialized. Configure the first pulse shaping circuit and the second pulse shaping circuit so that the first pulse shaping circuit and the second pulse shaping circuit output pulse signals with different amplitudes and widths; configure the first threshold voltage signal source and the second threshold voltage signal source so that The ratio of the voltage value of the first threshold voltage signal source to the voltage value of the second threshold voltage signal source is equal to 0.75.

[0054] Step 2: Select the X-ray radiation field as the medium-energy radiation field, and set the tube voltage of the X-ray radiation field. Specifically, the tube voltage value of the X-ray radiation field is 100 kV, 150 kV, ...

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Abstract

The invention relates to the technical field of ionization radiation testing, and provides a double-channel counting system and a measurement method of a dose equivalent in a high dose condition, so as to solve the problem of the measurement of the dose equivalent in the high dose condition. The measurement method mainly comprises the following steps: initializing the double-channel counting system; respectively performing measurement on an intermediate energy radiation field and a high energy radiation field; performing linear fitting on measured values obtained in various conditions, so as to obtain an interpolation equation. Through the adoption of the technical scheme, the correction of both the counting lineation and energy response of a semiconductor detector is realized within a certain radiation field average effective energy range.

Description

technical field [0001] The invention relates to the technical field of ionizing radiation testing, in particular to a double-channel counting system and a method for measuring dose equivalent under high dose conditions. Background technique [0002] Due to the characteristics of low power consumption, small size, high sensitivity, and real-time measurement, semiconductor personal dosimeters are widely used in radiation sites such as nuclear power plants, radiology, non-destructive detection, and reactors. The development of nuclear power will further intensify the demand for personal dosimeters along with the increasing demand for energy. However, due to the constraints of instrument power consumption, volume, and detector front-end technology, the detector electronic system composed of low-power consumption and arrayed components has a certain width of the output nuclear pulse signal. When it is in a high-dose radiation field, it will Pulse pile-up occurs, resulting in poo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/24G01T1/02
Inventor 黄平刘操龚岚杨乾
Owner 中国测试技术研究院辐射研究所
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