Optical fiber coupled radiation detector used for slow neutron measurement

Abstract

The invention relates to the radiometric technology and in particular to an optical fiber coupled radiation detector used for slow neutron measurement. The optical fiber coupled radiation detector used for the slow neutron measurement comprises a scintillation probe which is formed by blending of slow neutron sensitive materials and scintillating mediums, a transmission optical fiber and a photovoltaic sensitive component, wherein one end of the transmission optical fiber is inserted in the middle of the scintillation probe, the other end of the transmission optical fiber is connected with the photovoltaic sensitive component, and an optical wrapping layer of one part, arranged in the scintillation probe, of the transmission optical fiber is removed. The optical fiber coupled radiation detector used for the slow neutron measurement has the advantages of being simple in structure, small in size, strong in environment adaptability, capable of achieving on line real-time monitoring and the like, and can meet the demand of slow neutron measurement under complex and severe environment.

Description

technical field [0001] The invention relates to radiation measurement technology, in particular to a fiber-coupled radiation detector for slow neutron measurement. Background technique [0002] Neutrons have no electric charge, so detection of neutrons must be done with the help of secondary charged particles produced by the interaction of neutrons with atomic nuclei. The methods usually used for neutron detection are nuclear reaction method, nuclear recoil method, nuclear fission method and nuclear activation method. According to the working mechanism of the detector, it can be divided into gas ionization detector, semiconductor detector, scintillation detector and so on. Lithium-based reaction detectors for measuring slow neutrons include scintillation detectors and semiconductor detectors. In the existing scintillation detectors, the scintillator is usually connected to the end surface of the photomultiplier tube, and the light pulse emitted by the scintillator is direc...

AI Technical Summary

Problems solved by technology

The disadvantage is that the detector composed of scintillator and photomultiplier tube is bulky and has poor environmental adaptability.

The scintillator and the photomultiplier tube enter the neutron radiation field for measurement at the same time. If the radiation field is in a high-temperature and high-humidity environment or there is strong electromagnetic interference, it is easy to make the measurement data unreliable

In addition, due to its large size and high environmental sensitivity, it is subject to some restrictions in use, which is not conducive to the measurement of neutron radiation in complex environments

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