CN205845524U - A kind of neutrons collimation device for compact neutron generator - Google Patents
A kind of neutrons collimation device for compact neutron generator Download PDFInfo
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- CN205845524U CN205845524U CN201620552269.5U CN201620552269U CN205845524U CN 205845524 U CN205845524 U CN 205845524U CN 201620552269 U CN201620552269 U CN 201620552269U CN 205845524 U CN205845524 U CN 205845524U
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- neutron
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- generator
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Abstract
The utility model discloses a kind of neutrons collimation device for compact neutron generator, including compact neutron generator (1), internal layer NEUTRON PROTECTION layer (2), collimator (3), outer layer NEUTRON PROTECTION layer (4), gamma ray screen layer (5), detachable apparatus (6), fairlead (7).Internal layer NEUTRON PROTECTION layer uses the column polyethylene of a diameter of 300mm, the tubbiness paraffin that outer layer NEUTRON PROTECTION layer uses thickness to be 80mm, is used for reducing the impact of the neutron that leaks outside around neutron generator.Gamma ray screen layer uses thickness to be the lead layer of 40mm, is used for shielding neutron gamma ray produced with extraneous reaction.The material of collimator uses boron-doping paraffin, and being placed in can be at the detachable apparatus of free activity.This device can make the neutron around fairlead be absorbed by slowing down, allows neutron only penetrate from fairlead, forms neutron beam.
Description
Technical field
This utility model belongs to a kind of neutrons collimation device, is particularly used for the neutrons collimation of compact neutron generator
Device.
Background technology
Compact neutron generator is because its volume is little, easy to control, use the advantages such as safety to be widely used in various industry
In application, such as drugs explosive detection, neutron well logging, coal analysis etc..In the application of neutron generator, it is often necessary to use
The neutron beam of collimation, therefore the design of neutrons collimation device is a critically important link.Neutrons collimation is to allow around collimating aperture
Fast neutron absorbed by slowing down, make neutron only penetrate from collimating aperture, form neutron beam.Owing to neutron is not charged, for reality
Existing neutrons collimation, needs the aspect such as size design the choosing of protective shielding material, collimator to add to note.Meanwhile, in giving
Electronic generator adds neutrons collimation device, also can reduce the interference of surrounding objects, and the radiation protection to package unit has emphatically
The meaning wanted.
Summary of the invention
The purpose of this utility model is to provide a kind of neutrons collimation device for compact neutron generator, including tight
Gather type neutron generator, internal layer NEUTRON PROTECTION layer, collimator, outer layer NEUTRON PROTECTION layer, gamma ray screen layer, removable remove stage makeup and costume
Put, fairlead.Wherein internal layer NEUTRON PROTECTION layer uses the column polyethylene of a diameter of 300mm, and compact neutron generator is placed in
The center of internal layer NEUTRON PROTECTION layer, and tightly encased by internal layer NEUTRON PROTECTION layer；Outer layer NEUTRON PROTECTION layer uses thickness to be 80mm
Tubbiness paraffin, described internal layer NEUTRON PROTECTION layer is tightly encased；Gamma ray screen layer uses thickness to be the lead layer of 40mm, will
Compact neutron generator tightly encases；The boron-doping paraffin collimator that collimator selects thickness to be 150mm；Detachable apparatus can be certainly
By activity, it is used for placing collimator；The diameter of fairlead is fixed on 30mm.
The beneficial effects of the utility model are: (1) collimation after at collimating aperture the neutron population of outgoing apparently higher than surrounding
Neutron population, it is possible to meet the use requirement of compact neutron generator.(2) this neutrons collimation device both can do the generation of various neutron
The collimation of device and extraction experiment, can carry out neutron irradiation experiment again under conditions of collimation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
See Fig. 1, a kind of neutrons collimation device that can apply to compact neutron generator, send out including compact neutron
Raw device (1), internal layer NEUTRON PROTECTION layer (2), collimator (3), outer layer NEUTRON PROTECTION layer (4), gamma ray screen layer (5), removable
Handler (6), fairlead (7).Wherein internal layer NEUTRON PROTECTION layer uses the column polyethylene of a diameter of 300mm, compact neutron
Generator is placed in the center of internal layer NEUTRON PROTECTION layer, and is tightly encased by internal layer NEUTRON PROTECTION layer；Outer layer NEUTRON PROTECTION layer uses
Thickness is the tubbiness paraffin of 80mm, is tightly encased by described internal layer NEUTRON PROTECTION layer；Gamma ray screen layer employing thickness is
The lead layer of 40mm, tightly encases compact neutron generator；The boron-doping paraffin collimator that collimator selects thickness to be 150mm；
Detachable apparatus can be freely movable, is used for placing collimator；The diameter of fairlead is fixed on 30mm.
In this neutrons collimation device, compact neutron generator is tight by internal layer NEUTRON PROTECTION layer and outer layer NEUTRON PROTECTION layer
Hard-pressed bale is lived, the leakage outside to reduce the produced neutron of neutron generator.Gamma ray screen layer is used for shielding neutron with extraneous
The produced gamma ray of reaction.Detachable apparatus is positioned at compact neutron generator lower end, can be freely movable, is used for placing
With fixing collimator.Owing to most of neutrons can cause part with hole wall multiple impacts through collimator from collimating aperture outgoing
Neutron is absorbed, and can make around collimating aperture and in hole, the neutron population of outgoing all reduces, but the neutron population of outgoing from collimating aperture
The degree reduced is little.When select thickness be the boron-doping paraffin collimator of 150mm, the diameter of fairlead be fixed on 30mm time, from
Around collimating aperture, the neutron population of outgoing is reduced to the 3% of neutron generator outgoing neutron number, the neutron population of outgoing from collimating aperture
For the 18% of neutron generator outgoing neutron number, the neutron population of collimating aperture outgoing, apparently higher than the neutron population around collimating aperture, is said
Bright neutron bunchy outgoing, it is achieved that the collimation purpose required by this device.
Claims (7)
1. the neutrons collimation device for compact neutron generator, it is characterised in that: include compact neutron generator
(1), internal layer NEUTRON PROTECTION layer (2), collimator (3), outer layer NEUTRON PROTECTION layer (4), gamma ray screen layer (5), removable remove stage makeup and costume
Putting (6), fairlead (7), wherein compact neutron generator is placed in the center of internal layer NEUTRON PROTECTION layer, and by internal layer NEUTRON PROTECTION
Layer tightly encases, and internal layer NEUTRON PROTECTION layer is tightly encased by outer layer NEUTRON PROTECTION layer, and gamma ray screen layer is by compact neutron
Generator tightly encases, and detachable apparatus can be freely movable, is used for placing and fixing collimator.
A kind of neutrons collimation device for compact neutron generator the most according to claim 1, it is characterised in that: institute
Stating internal layer NEUTRON PROTECTION layer and use the column polyethylene of a diameter of 300mm, described compact neutron generator is placed in internal layer neutron
The center of overcoat, and tightly encased by internal layer NEUTRON PROTECTION layer.
A kind of neutrons collimation device for compact neutron generator the most according to claim 1, it is characterised in that: institute
State the tubbiness paraffin that outer layer NEUTRON PROTECTION layer uses thickness to be 80mm, described internal layer NEUTRON PROTECTION layer is tightly encased.
A kind of neutrons collimation device for compact neutron generator the most according to claim 1, it is characterised in that: institute
Stating gamma ray screen layer uses thickness to be the lead layer of 40mm, is tightly encased by described compact neutron generator.
A kind of neutrons collimation device for compact neutron generator the most according to claim 1, it is characterised in that: institute
State the boron-doping paraffin collimator that collimator selects thickness to be 150mm.
A kind of neutrons collimation device for compact neutron generator the most according to claim 1, it is characterised in that: institute
Stating detachable apparatus can be freely movable, is used for placing and fixing collimator.
A kind of neutrons collimation device for compact neutron generator the most according to claim 1, it is characterised in that: institute
The diameter stating fairlead is fixed on 30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620552269.5U CN205845524U (en) | 2016-06-06 | 2016-06-06 | A kind of neutrons collimation device for compact neutron generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620552269.5U CN205845524U (en) | 2016-06-06 | 2016-06-06 | A kind of neutrons collimation device for compact neutron generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205845524U true CN205845524U (en) | 2016-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620552269.5U Expired - Fee Related CN205845524U (en) | 2016-06-06 | 2016-06-06 | A kind of neutrons collimation device for compact neutron generator |
Country Status (1)
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| CN (1) | CN205845524U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110164582A (en) * | 2019-05-31 | 2019-08-23 | 钱铁威 | A kind of neutrons collimation device that fast neutron beam diameter can be adjusted |
| CN111667930A (en) * | 2020-05-26 | 2020-09-15 | 中国原子能科学研究院 | DD neutron generator shielding device |
| CN114283952A (en) * | 2021-11-19 | 2022-04-05 | 核工业西南物理研究院 | Vertical neutron camera shielding and collimating structure |
-
2016
- 2016-06-06 CN CN201620552269.5U patent/CN205845524U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110164582A (en) * | 2019-05-31 | 2019-08-23 | 钱铁威 | A kind of neutrons collimation device that fast neutron beam diameter can be adjusted |
| CN111667930A (en) * | 2020-05-26 | 2020-09-15 | 中国原子能科学研究院 | DD neutron generator shielding device |
| CN111667930B (en) * | 2020-05-26 | 2022-06-28 | 中国原子能科学研究院 | DD neutron generator shielding device |
| CN114283952A (en) * | 2021-11-19 | 2022-04-05 | 核工业西南物理研究院 | Vertical neutron camera shielding and collimating structure |
| CN114283952B (en) * | 2021-11-19 | 2023-05-16 | 核工业西南物理研究院 | Vertical neutron camera shielding and collimating structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161228 Termination date: 20170606 |