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Real-time online gamma and electron absorbed dose rate testing system

A test system, electronic absorption technology, applied in the field of radiation monitoring, can solve problems such as design failure, test failure, radiation failure, etc., achieve good radiation resistance, easy replacement, and reduce costs

Inactive Publication Date: 2015-07-22
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These inventions all hope to use fewer modules to achieve the purpose of online test dose rate, but these designs cannot be applied in strong radiation fields, because these inventions integrate electronic modules in the front-end dosimeters for positioning and remote data transmission Due to its radiation vulnerability, the electronic module is very likely to radiate failure or error immediately in a strong radiation field, resulting in the failure of the entire test

Method used

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  • Real-time online gamma and electron absorbed dose rate testing system
  • Real-time online gamma and electron absorbed dose rate testing system
  • Real-time online gamma and electron absorbed dose rate testing system

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Experimental program
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Effect test

Embodiment 1

[0040] Combine below Figure 1 ~ Figure 3 A real-time on-line test system for measuring gamma absorbed dose rate of the present invention is described.

[0041] figure 1 It is a structural schematic diagram of the real-time online gamma and electron absorbed dose rate testing system of the present invention. figure 2 It is a schematic diagram of the recording and calculation software in the present invention, and the software realizes the functions of real-time display of current, voltage and absorbed dose rate according to steps (1) to (5). image 3 It is the corresponding relationship diagram of absorbed dose rate-current in the present invention, showing the corresponding relationship diagram of the absorbed dose rate in the photogenerated current of two silicon diode dosimeters of the same type measured by the remote online test system in embodiment 1 and the gamma radiation field, Fig. The middle abscissa is the absorbed dose rate in Gy / min, and the ordinate is the pho...

Embodiment 2

[0051] The system structure of this embodiment, the recording and computing software in the system are the same as those of Embodiment 1. In this embodiment, a commercially available Schottky silicon carbide diode with a surface area of ​​1 mm × 1 mm is used as the front-end dosimeter for the front-end dosimeter and the fixture, and a 30-meter-long low-loss radio frequency cable is used as the radiation-resistant cable. The multi-channel scanning card assembly, the digital source meter is selected as the current-voltage measuring device, the RS232 connection is used as the signal transmission interface, and the control computer including the recording and calculation software is selected as the recording and calculation software independently prepared by itself, and the industrial electron beam is tested. The absorbed dose rate of the irradiation field of the irradiation device can directly display the absorbed dose rate value of any point in the electron beam radiation field t...

Embodiment 3

[0053] The system structure of this embodiment, the recording and computing software in the system are the same as those of Embodiment 1. In this embodiment, the front-end dosimeter and the fixture use a commercially available gallium arsenide diode as the front-end dosimeter, select the supporting fixture, use a 50-meter-long low-loss radio frequency cable as the radiation-resistant cable, and use a three-way multi-channel scanning card assembly , select the digital source meter as the current-voltage measurement equipment, use the network interface as the signal transmission interface, and use the self-compiled software as the recording and calculation software for the control computer including recording and calculation software, which is used to test the semiconductor device in the gamma radiation field Current-voltage real-time changes.

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Abstract

The invention provides a real-time online gamma and electron absorbed dose rate testing system which comprises a front-end dosimeter, a clamp, a radiation-resistant cable, a multichannel scanning card component, a current-voltage measuring device and a control computer containing recording and calculation software. A semiconductor diode sold on the market is used as the dosimeter which increases measuring precision and space resolution as compared with an ionization chamber dosimeter, dosimeter cost is lowered, the dosimeter is easy to replace, high-voltage bias is not needed, and the dosimeter is unaffected by air pressure. The real-time online gamma and electron absorbed dose rate testing system has the advantages that real-time online monitoring of absorbed dose rate is achieved, and the system is applicable to remote real-time monitoring of the absorbed dose rate of strong radiation fields such as a cobalt source radiation device, an electron beam radiation device and a nuclear power station; the system is good in radiation resistance, and multiple dosimeters can be assembled to the system so as to achieve multi-point measuring and data processing of the dose rate.

Description

technical field [0001] The invention belongs to the field of radiation monitoring, and in particular relates to a real-time online gamma and electronic absorbed dose rate testing system, which is used as a dose rate detection system for real-time monitoring of radiation fields. Background technique [0002] Gamma industrial irradiation devices, electronic irradiation devices, nuclear power plant dose monitoring and material radiation performance assessment all require accurate monitoring of absorbed dose rate to ensure personnel safety or use it as important scientific research information. For the above-mentioned radiation sources, a remote real-time online absorbed dose rate detection system is used to monitor the internal absorbed dose rate, which can prevent personnel from being too close to cause injury. [0003] Thermoluminescence, various chemical dosimeters and ionization chamber dosimeters are mostly used in the measurement of absorbed dose rate in the existing stro...

Claims

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Application Information

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IPC IPC(8): G01T1/02
Inventor 杨桂霞李晓燕付澜
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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