CN103163550A - Optical fiber coupled radiation detector used for fast neutron measurement - Google Patents
Optical fiber coupled radiation detector used for fast neutron measurement Download PDFInfo
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- CN103163550A CN103163550A CN 201110410562 CN201110410562A CN103163550A CN 103163550 A CN103163550 A CN 103163550A CN 201110410562 CN201110410562 CN 201110410562 CN 201110410562 A CN201110410562 A CN 201110410562A CN 103163550 A CN103163550 A CN 103163550A
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- fast neutron
- radiation detector
- optical fiber
- transmission fibers
- scintillation probe
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- 230000005855 radiation Effects 0.000 title claims abstract description 24
- 239000013307 optical fiber Substances 0.000 title abstract description 16
- 238000005259 measurement Methods 0.000 title abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 239000000523 sample Substances 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000000835 fiber Substances 0.000 claims description 38
- 230000008878 coupling Effects 0.000 claims description 18
- 238000010168 coupling process Methods 0.000 claims description 18
- 238000005859 coupling reaction Methods 0.000 claims description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 239000013308 plastic optical fiber Substances 0.000 claims description 3
- 238000005253 cladding Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 230000004992 fission Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
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- 230000004913 activation Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
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- 239000000047 product Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- Measurement Of Radiation (AREA)
Abstract
The invention relates to the radiometric technology and in particular to an optical fiber coupled radiation detector used for fast neutron measurement. The optical fiber coupled radiation detector used for the fast neutron measurement comprises a scintillation probe which is formed by blending of fast 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 fast 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 fast neutron measurement under complex and severe environment.
Description
Technical field
The present invention relates to radiometric technique, be specifically related to a kind of coupling fiber radiation detector for the fast neutron measurement.
Background technology
The neutron neutral, so detected neutron must occur to interact and the secondary charged particle that produces realizes by itself and atomic nucleus.The method that is generally used for neutron detection has nuclear reaction method, the method for nuclear recoil, nuclear fission method and core activation method.Working mechanism by detector can be divided into gas ionization detector, semiconductor detector, scintillation detector etc.Method of nuclear recoil fast neutron scintillation detector comprises ZnS fast neutron screen, plastic scintillant etc.And the nucleic with fission threshold, for example
232Th (1.3MeV),
234U (0.4MeV),
238U (1.4MeV) etc. can be configured for the nuclear fission type neutron detector that fast neutron is measured.
Existing scintillation detector normally is connected scintillator with the photomultiplier transit end surfaces, the light pulse that scintillator sends is directly received by photomultiplier.Its shortcoming is that the detector volume of scintillator and photomultiplier composition is large, environmental suitability is poor, easily is interfered under rugged surroundings, and measurement data is unreliable.
Summary of the invention
The object of the invention is to the defective for prior art, provide a kind of simple in structure, volume is little, the adaptable coupling fiber radiation detector of measuring for fast neutron.
Technical scheme of the present invention is as follows: a kind of coupling fiber radiation detector for the fast neutron measurement, comprise the scintillation probe, Transmission Fibers, the photoelectric sensitive device that form after being mixed by fast neutron sensitive material and scintillator, described Transmission Fibers one end inserts in the middle of scintillation probe, the other end connects photoelectric sensitive device, and the part that Transmission Fibers is placed in scintillation probe is removed fibre cladding.
Further, the coupling fiber radiation detector for the fast neutron measurement as above, wherein, described scintillation probe is by the fast neutron sensitive material
232Th and scintillator ZnS (Ag) mix in mass ratio at 2: 1.
Further, the coupling fiber radiation detector of measuring for fast neutron as above, wherein, described scintillation probe outside is provided with cylindrical aluminum hull, and the external diameter of aluminum hull is 5～7mm, and internal diameter is 3～5mm, and length is 10～15mm.
Further, the coupling fiber radiation detector for the fast neutron measurement as above, wherein, described photoelectric sensitive device is photomultiplier.
Further, the coupling fiber radiation detector for the fast neutron measurement as above, wherein, described Transmission Fibers adopts covering and core body to be all plastic optical fiber of plastic material, and the core diameter of Transmission Fibers is 0.9～1mm.
Further, the coupling fiber radiation detector for the fast neutron measurement as above, wherein, the length that described Transmission Fibers is positioned at scintillation probe is 8～13mm.
Beneficial effect of the present invention is as follows: the present invention utilizes optical fiber that scintillation probe and the photoelectric sensitive device (as photomultiplier) that fast neutron sensitive material, scintillator consist of is coupled, and forms and is used for the coupling fiber radiation detector that fast neutron is measured.It has simple in structure, the advantages such as volume is little, environmental suitability is strong, on-line real time monitoring, and the fast neutron radiation that can satisfy under complexity, rugged surroundings is surveyed.
Description of drawings
Fig. 1 is the structural representation of coupling fiber radiation detector of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1, the coupling fiber radiation detector for the fast neutron measurement provided by the present invention mainly comprises the scintillation probe 1, Transmission Fibers 2 and the photoelectric sensitive device 3 that are made of fast neutron sensitive material and scintillator.Its detection principle is: utilize fast neutron sensitive material and fast neutron to react, passage of scintillation light is sent in reaction product and scintillator effect, and passage of scintillation light is passed to photoelectric sensitive device by Transmission Fibers, thereby obtains measuring-signal.
With fast neutron sensitive material commonly used (
232Th) be example, fast neutron with
232Th reacts, and generates two fission fragments that quality is close, and the energy of every fission fragment reaches 40～110MeV, and passage of scintillation light is sent in these reaction product and scintillator ZnS (Ag) effect, and passage of scintillation light is passed to photomultiplier by Transmission Fibers.Due to
232Th and fast neutron reaction have the threshold characteristic, and fission threshold is about 1.17MeV, therefore can detect the above fast neutron of this threshold energy.
232Th be sealed in (size is about several mm) in the cylindrical aluminium container after ZnS (Ag) mixes with certain proportion, consist of the fast neutron scintillation probe; One end of Transmission Fibers inserts in the middle of scintillation probe, and insertion portion has removed the covering of optical fiber, and the other end of optical fiber connects photomultiplier.
The fast neutron sensitive material
232The blending ratio of Th and scintillator ZnS (Ag) is generally determined by the actual conditions of surveying requirement, in the present embodiment
232Th mixes in mass ratio with ZnS (Ag) at 2: 1, and potpourri is Powdered.In addition, can also select other materials, as
238U mixes with ZnS (Ag), and blending ratio determines by the actual conditions of surveying requirement, also can be with reference to the ratio data of the present embodiment.
In the present embodiment, the external diameter of cylindrical aluminum hull is 5～7mm, and internal diameter is 3～5mm, and length is 10～15mm, and thickness is in the 1mm left and right.
Transmission Fibers in this example adopts radiation-resistant fiber, optical fiber is all plastic optical fiber (covering and core are plastics), the length range that optical fiber is positioned at scintillation probe is 8～13mm, length range between scintillation probe and photoelectric sensitive device can determine according to actual needs, general in the 100m scope decay of fluorescence signal less than 5%.The core diameter of optical fiber is 0.9～1mm approximately.Photomultiplier adopts the photomultiplier of single photon counting, carry out between optical fiber and photomultiplier simply docking and get final product, in order to prevent that light leak from allowing connection more firm simultaneously, also can use some web members between optical fiber and photomultiplier, the structure of web member can design according to the concrete shape of product.This detector has carried out experimental measurement in certain research reactor, confirm that its working stability is reliable.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of claim of the present invention and equivalent technology thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (6)
1. one kind is used for the coupling fiber radiation detector that fast neutron is measured, it is characterized in that: comprise the scintillation probe (1), Transmission Fibers (2), the photoelectric sensitive device (3) that form after being mixed by fast neutron sensitive material and scintillator, described Transmission Fibers (2) one ends insert in the middle of scintillation probe (1), the other end connects photoelectric sensitive device (3), and the part that Transmission Fibers (2) is placed in scintillation probe (1) is removed fibre cladding.
2. the coupling fiber radiation detector of measuring for fast neutron as claimed in claim 1, it is characterized in that: described scintillation probe (1) is by the fast neutron sensitive material
232Th and scintillator ZnS (Ag) mix in mass ratio at 2: 1.
3. the coupling fiber radiation detector of measuring for fast neutron as claimed in claim 1 or 2 is characterized in that: described scintillation probe (1) outside is provided with cylindrical aluminum hull, and the external diameter of aluminum hull is 5～7mm, and internal diameter is 3～5mm, and length is 10～15mm.
4. the coupling fiber radiation detector of measuring for fast neutron as claimed in claim 1 or 2, it is characterized in that: described photoelectric sensitive device (3) is photomultiplier.
5. the coupling fiber radiation detector of measuring for fast neutron as claimed in claim 1 or 2, it is characterized in that: described Transmission Fibers (2) adopts covering and core body to be all plastic optical fiber of plastic material, and the core diameter of Transmission Fibers is 0.9～1mm.
6. the coupling fiber radiation detector of measuring for fast neutron as claimed in claim 5, it is characterized in that: the length that described Transmission Fibers (2) is positioned at scintillation probe (1) is 8～13mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110410562 CN103163550A (en) | 2011-12-12 | 2011-12-12 | Optical fiber coupled radiation detector used for fast neutron measurement |
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| CN 201110410562 CN103163550A (en) | 2011-12-12 | 2011-12-12 | Optical fiber coupled radiation detector used for fast neutron measurement |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105068107A (en) * | 2015-07-17 | 2015-11-18 | 成都艾立曼科技有限公司 | Scintillating fiber sensor used for high sensitivity radiation detection |
| CN105467424A (en) * | 2014-09-10 | 2016-04-06 | 中国辐射防护研究院 | Plutonium-doped fiber and neutron measuring method thereof |
| CN105917251A (en) * | 2014-01-14 | 2016-08-31 | 住友重机械工业株式会社 | Neutron radiation detector and neutron capture therapy apparatus |
| CN106324655A (en) * | 2015-06-30 | 2017-01-11 | 中国辐射防护研究院 | Plastic scintillator doped with neutron-sensitive material uranium and method thereof for measuring thermal neutrons |
| CN106597521A (en) * | 2016-12-28 | 2017-04-26 | 中国工程物理研究院激光聚变研究中心 | Fast neutron detector resisting interference of strong gamma rays and application method thereof |
| CN106772548A (en) * | 2017-02-10 | 2017-05-31 | 东莞理工学院 | Neutron scintillator position sensitive detector testing system and method |
| CN108398709A (en) * | 2017-02-08 | 2018-08-14 | 中国辐射防护研究院 | A kind of optical fiber radiation probe |
| CN108398710A (en) * | 2017-02-08 | 2018-08-14 | 中国辐射防护研究院 | A kind of device measured in real time for neutron energy spectrum in reactor |
| CN108431635A (en) * | 2016-03-16 | 2018-08-21 | 株式会社日立制作所 | Dose rate measuring device and radiation therapy device |
| CN108535769A (en) * | 2017-03-03 | 2018-09-14 | 中国辐射防护研究院 | A kind of probe and its test calibration method tested for optical fiber neutron detection system with calibration |
| CN108562930A (en) * | 2018-04-18 | 2018-09-21 | 中国科学院合肥物质科学研究院 | A kind of wide power spectrum neutron measurement system of feature peak-seeking |
| CN113687406A (en) * | 2021-09-23 | 2021-11-23 | 中国工程物理研究院激光聚变研究中心 | Pulse neutron emission time detector |
| CN114994743A (en) * | 2022-06-14 | 2022-09-02 | 西北核技术研究所 | A fast neutron time spectrum detection method and device |
| CN115453608A (en) * | 2022-10-10 | 2022-12-09 | 哈尔滨工程大学 | Coupling enhancement type X/gamma ray optical fiber detector embedded with scintillation material |
| CN116520386A (en) * | 2023-04-17 | 2023-08-01 | 中国科学院合肥物质科学研究院 | High-energy ion probe based on optical fiber transmission |
-
2011
- 2011-12-12 CN CN 201110410562 patent/CN103163550A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105917251A (en) * | 2014-01-14 | 2016-08-31 | 住友重机械工业株式会社 | Neutron radiation detector and neutron capture therapy apparatus |
| CN105917251B (en) * | 2014-01-14 | 2018-11-16 | 住友重机械工业株式会社 | Neutron ray detection device and neutron-capture therapy device |
| CN105467424A (en) * | 2014-09-10 | 2016-04-06 | 中国辐射防护研究院 | Plutonium-doped fiber and neutron measuring method thereof |
| CN106324655A (en) * | 2015-06-30 | 2017-01-11 | 中国辐射防护研究院 | Plastic scintillator doped with neutron-sensitive material uranium and method thereof for measuring thermal neutrons |
| CN105068107B (en) * | 2015-07-17 | 2018-12-18 | 成都艾立本科技有限公司 | Glitter fibre optical sensor for highly sensitive detection radiation |
| CN105068107A (en) * | 2015-07-17 | 2015-11-18 | 成都艾立曼科技有限公司 | Scintillating fiber sensor used for high sensitivity radiation detection |
| CN108431635A (en) * | 2016-03-16 | 2018-08-21 | 株式会社日立制作所 | Dose rate measuring device and radiation therapy device |
| CN108431635B (en) * | 2016-03-16 | 2022-05-17 | 株式会社日立制作所 | Dose rate measuring device and radiotherapy device |
| CN106597521A (en) * | 2016-12-28 | 2017-04-26 | 中国工程物理研究院激光聚变研究中心 | Fast neutron detector resisting interference of strong gamma rays and application method thereof |
| CN108398709A (en) * | 2017-02-08 | 2018-08-14 | 中国辐射防护研究院 | A kind of optical fiber radiation probe |
| CN108398710A (en) * | 2017-02-08 | 2018-08-14 | 中国辐射防护研究院 | A kind of device measured in real time for neutron energy spectrum in reactor |
| CN106772548A (en) * | 2017-02-10 | 2017-05-31 | 东莞理工学院 | Neutron scintillator position sensitive detector testing system and method |
| CN108535769B (en) * | 2017-03-03 | 2022-06-07 | 中国辐射防护研究院 | Probe for testing and calibrating optical fiber neutron detection system and testing and calibrating method thereof |
| CN108535769A (en) * | 2017-03-03 | 2018-09-14 | 中国辐射防护研究院 | A kind of probe and its test calibration method tested for optical fiber neutron detection system with calibration |
| CN108562930A (en) * | 2018-04-18 | 2018-09-21 | 中国科学院合肥物质科学研究院 | A kind of wide power spectrum neutron measurement system of feature peak-seeking |
| CN113687406A (en) * | 2021-09-23 | 2021-11-23 | 中国工程物理研究院激光聚变研究中心 | Pulse neutron emission time detector |
| CN114994743A (en) * | 2022-06-14 | 2022-09-02 | 西北核技术研究所 | A fast neutron time spectrum detection method and device |
| CN114994743B (en) * | 2022-06-14 | 2024-08-16 | 西北核技术研究所 | A fast neutron time spectrum detection method and device |
| CN115453608A (en) * | 2022-10-10 | 2022-12-09 | 哈尔滨工程大学 | Coupling enhancement type X/gamma ray optical fiber detector embedded with scintillation material |
| CN116520386A (en) * | 2023-04-17 | 2023-08-01 | 中国科学院合肥物质科学研究院 | High-energy ion probe based on optical fiber transmission |
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Application publication date: 20130619 |