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OSL-based on-line remote measuring system for gamma radiation dose

A technology of dose measurement and gamma radiation, applied in the field of nuclear radiation measurement, can solve the problems of inability to conduct online monitoring and real-time measurement

Inactive Publication Date: 2016-11-09
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

[0003] At present, OSL technology is mainly used in personal dose monitoring and laboratory offline measurement in the field of nuclear radiation measurement, and it cannot achieve real-time measurement and online monitoring

Method used

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  • OSL-based on-line remote measuring system for gamma radiation dose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The probe part of the probe assembly 8 in this embodiment is a small cylinder with a size of about 10mm×Ф8mm.

[0032] The excitation light source 1 is a green laser with a wavelength of 532nm, and the laser emission mode is constant.

[0033] The photon counter 3 is a Hamamatsu CH254 photon counter, the spectral response range is 300-650nm, and the counting rate is linearly equal to 2×10 6 / s.

[0034] The filter set 4 is composed of a Boya B-370 bandpass filter with a thickness of 7.5 mm and a filter with a cut-off (532 or 630) nm wavelength in series.

[0035] The shell of the probe assembly 8 is made of metal aluminum, cylindrical and hollow, with an overall size of about 10mm×Ф8mm and a thickness of about 2mm.

[0036] The diameter of the optical fiber I9, optical fiber II10 and optical fiber III11 is about 2mm.

[0037] The fiber coupling (5) is 7-core fiber Y-branch coupling.

[0038] The OSL detector 7 is a single-point dose tablet of Landauer, and the sensi...

Embodiment 2

[0040] The implementation of this embodiment is basically the same as that of Embodiment 1, the main difference is that: the laser emission mode is pulsed.

Embodiment 3

[0042] The implementation of this example is basically the same as that of Example 1, the main difference is that: the excitation light source 1 is a red laser with a wavelength of 630nm.

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PUM

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Abstract

The invention discloses an optically-simulated-luminescence (OSL)-based on-line remote measuring system for a gamma radiation dose. The measuring system comprises a case and a probe; and the two parts are in physical connection and carry out signal transmission by a fiber. The case consists of an excitation light source, a photon counter, a filter group, and a dark box; the excitation light source, the photon counter, and the probe are connected by fibers for fiber coupling. The probe includes an OSL detector and a photoelectric receiving lens; and the probe dimension is at a millimeter order. According to the system, real-time monitoring is carried out on a radiation field by using an OSL technology and rapid and on-line measurement and remote measurement are carried out on the gamma radiation dose. Especially, the system can be used for monitoring a radiation dose received by a human body focus part during a radiotherapy process.

Description

technical field [0001] The invention belongs to the field of nuclear radiation measurement, in particular to an OSL online long-distance gamma radiation dose measurement system. Background technique [0002] OSL (Optically Stimulated Luminescence), also known as optoluminescence, is the frontier of luminescence dosimetry in the 21st century and a new development direction of radiation monitoring. The detection material of the radiation is Al 2 o 3 :C powder. Each OSL detector (detection element) is a circular Al 2 o 3 : C disc, which is clamped by two polyester films 2 o 3 :C powder composition. The interaction between the ray and the detector produces electron-hole pairs, the trap captures the electron-hole pair, the detector is irradiated by light, the electrons in the trap are excited and transition to the conduction band, and the free electrons and holes coincide to emit light in the luminescent center, and the luminous intensity is the same as proportional to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/10
CPCG01T1/10
Inventor 陈飞袁永刚陈华
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF