CN206057590U - Slow neutron detection device - Google Patents
Slow neutron detection device Download PDFInfo
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- CN206057590U CN206057590U CN201621054066.XU CN201621054066U CN206057590U CN 206057590 U CN206057590 U CN 206057590U CN 201621054066 U CN201621054066 U CN 201621054066U CN 206057590 U CN206057590 U CN 206057590U
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Abstract
A kind of slow neutron detection device is disclosed, including：First slow neutron conversion body and the second slow neutron conversion body and the read-out electrode silk group being disposed there between and cathode filament group.By reading circuit is arranged between two slow neutron conversion bodies so that in the case where detector overall dimensions are constant, electronics drift distance reduces half, improves the average of signal and cross threshold probability.
Description
Technical field
It relates to slow neutron detection, in particular to a kind of slow neutron detection for improving slow neutron detection efficient
Device.
Background technology
As slow neutron detection, imaging technique are in multiple directions such as Homeland Security, material monitoring, the measurements of scattering of slow neutrons source
Using gradually increasing, for the demand of slow neutron detector also gradually increases.However, widely used3He gases can not be expired
The use demand of sufficient sustainable growth, different types of new slow neutron detector are developed for substituting3He, including gas
Slow neutron detector, scintillator slow neutron detector, quasiconductor slow neutron detector etc..
For a slow neutron detector, slow neutron conversion body is one of important feature.Slow neutron itself is not
It is electrically charged, except a few slow neutron sensitivity nucleic such as6Li、10B, Gd etc., slow neutron are compared with the reaction cross-section of other materials
Less, visual effect is exactly that slow neutron is difficult to be arrived by direct detection.It is sensitive rich in more slow neutron inside slow neutron conversion body
Slow neutron can be converted to charged particle by nuclear reaction by nucleic.Detector can to measure these powered with more convenient
The energy of particle, positional information, and then the related physical information of incident slow neutron can be obtained.
In the design of gas slow neutron detector, according to the difference of the basic detector for using, can have polytype slow
Neutron conversion body and slow neutron detector, such as based on the gas slow neutron detector of cylindrical proportional detector array, be based on
The gas slow neutron detector of plate ionization chamber stacking.
In the gas slow neutron detector based on cylindrical proportional detector array, most basic slow neutron probe unit
It is a cylindrical proportional detector, each unit has independent anode wire and signal collection processing system, Typical Representative
Such as " Caulis et Folium Oryzae pipe " slow neutron detector array.However, the slow neutron sensitive area of detector and slow neutron detection efficient substantially with
The quadratic power of cylindrical proportional detector number is directly proportional, and the installation, maintenance of a large amount of anode wires in whole system has very big
Workload, the difference of each slow neutron probe unit detection efficient can also affect the overall performance of system.
In the gas slow neutron detector stacked based on plate ionization chamber, most basic slow neutron probe unit is one
Individual plate ionization chamber, each ionization chamber have independent 2D signal read-out system, Typical Representative such as Gd-GEM slow neutrons detection
Device.However, the slow neutron detection efficient of monolayer plane ionization chamber is needed using multiple stackings, slow neutron glancing incidence etc. than relatively low
Method improves overall slow neutron detection efficient, but this brings very big pressure can to overall signal readout process, it has not been convenient to real
Existing large area slow neutron detection.
Utility model content
For one or more problems of the prior art, it is proposed that a kind of slow neutron detection device.
According to one side of the present utility model, it is proposed that a kind of slow neutron detection device, including：First slow neutron is changed
Body and the second slow neutron conversion body, the first slow neutron conversion body and the second slow neutron conversion body are configured to and incidence
Neutron reacts, and produces electronics；Electron multiplication and sensing device, are arranged on the first slow neutron conversion body and described
Between second slow neutron conversion body, the electronics is doubled and read.
According to some embodiments, the electron multiplication and sensing device include：First cathode filament group, including parallel arranged
A plurality of wire electrode, and be arranged between the first slow neutron conversion body and the second slow neutron conversion body near described the
One slow neutron conversion body one end；Second cathode filament group, including a plurality of wire electrode of parallel arranged, and it is slow to be arranged on described first
Near described second slow neutron conversion body one end between neutron conversion body and the second slow neutron conversion body；Read-out electrode silk
Group, including a plurality of wire electrode of parallel arranged, work as anode, and are arranged on the first cathode filament group and with described second
Between cathode filament group, a plurality of wire electrode of the read-out electrode silk group and a plurality of wire electrode of the first cathode filament group and described
The bearing of trend perpendicular of a plurality of wire electrode of second electrode silk group.
According to some embodiments, described slow neutron detection device also includes：First cathode plate, relative to described first
Cathode filament group is arranged on the other end of the first slow neutron conversion body；Second cathode plate, relative to second cathode filament
Group is arranged on the other end of the second slow neutron conversion body.
According to some embodiments, described slow neutron detection device also includes：First electric field protect silk group, including it is a plurality of simultaneously
The wire electrode of row arrangement, is arranged between the first cathode filament group and the first slow neutron conversion body；Second electric field is protected
Silk group, including the wire electrode of a plurality of parallel arranged, are arranged between the second cathode filament group and the second neutron conversion body.
According to some embodiments, the spacing between the read-out electrode silk group and the first cathode filament group is 2-3 millimeters, described
Spacing between a plurality of wire electrode of read-out electrode is 3-5 millimeters.
Each according to some embodiments, the first slow neutron conversion body and the second slow neutron conversion body is wrapped
Include：Matrix, including run through hole along multiple holes that the direction vertical with a plurality of wire electrode place plane of the read-out electrode extends
And the insulation wall between the plurality of perforated holes；Boron layer, at least covers the exposed surface of the plurality of perforated holes.
According to the body of each of some embodiments, the first slow neutron conversion body and the second slow neutron conversion body
Product scope is 1-20000 cubic centimetres, and the diameter scope of the perforated holes is in 1-10 millimeters.
It is bottom according to each of some embodiments, the first slow neutron conversion body and the second slow neutron conversion body
Face is 10 centimetres of 10 cm x, and high 5 centimetres of cuboid applies boron slow neutron conversion body, a diameter of 3.6 millimeters of perforated holes.
According to some embodiments, the coating thickness of boron layer is 1-3 microns, preferably 1.6 microns.
According to some embodiments, described slow neutron detection device also includes：Field cage with cylindrical-shaped structure, the field
Cage surrounds the first slow neutron conversion body and the second slow neutron conversion body.
According to some embodiments, the field cage includes multiple coaxial copper bands, and the plurality of coaxial copper band is used to add respectively
Gradient voltage.
By reading circuit is arranged between two slow neutron conversion bodies so that in the feelings that detector overall dimensions are constant
Under condition, electronics drift distance reduces half, improves the average of signal and crosses threshold probability.
Description of the drawings
In order to be better understood from this utility model, embodiment of the present utility model will be described according to the following drawings：
Fig. 1 illustrates the axonometric chart of the slow neutron conversion body according to one example embodiment of the disclosure；
Fig. 2 illustrates the sectional view of the slow neutron conversion body shown in Fig. 1；
Fig. 3 illustrates the slow neutron detection efficient of the slow neutron conversion body according to the disclosure and the relation of boron layer mass thickness
Figure；
Fig. 4 illustrates the structure chart of the slow neutron detection device according to one example embodiment of the disclosure；
Fig. 5 illustrates the structural representation of the read-out electrode and cathode filament group according to one example embodiment of the disclosure；
Fig. 6 illustrates the schematic diagram of the course of work of the slow neutron detection device according to the disclosure；
Fig. 7 is illustrated according to the slow neutron detection device of the disclosure to crossing the schematic diagram of the raising of threshold probability.
Accompanying drawing is not shown to all circuits or structure of embodiment.Through all accompanying drawing identical reference tables
Show same or analogous part or feature.
Specific embodiment
Specific embodiment of the utility model is described more fully below, it should be noted that the embodiments described herein is served only for
Illustrate, be not limited to this utility model.In the following description, in order to provide to thorough understanding of the present utility model,
Elaborate a large amount of specific details.It will be apparent, however, to one skilled in the art that：These certain details need not be adopted
Save to carry out this utility model.In other instances, in order to avoid obscuring this utility model, do not specifically describe known circuit,
Material or method.
Throughout the specification, meaning is referred to " one embodiment ", " embodiment ", " example " or " example "
：Special characteristic, structure or the characteristic described with reference to the embodiment or example is comprised at least one enforcement of this utility model
In example.Therefore, entire disclosure each place occur phrase " in one embodiment ", " in embodiment ", " one
Example " or " example " are not necessarily all referring to same embodiment or example.Furthermore, it is possible to any appropriate combination and/or sub-portfolio
By specific feature, structure or property combination in one or more embodiments or example.Additionally, those of ordinary skill in the art
It should be appreciated that accompanying drawing is provided to descriptive purpose provided herein, and accompanying drawing is not necessarily drawn to scale.Here make
Term "and/or" includes any and all combination of the project that one or more correlations are listed.
" slow neutron " hereinafter mentioned refers to the neutron less than a certain particular value.The selection of the value depends on concrete application
Occasion.For example, in neutronics and Application of Nuclear Technology, the neutron generally energy less than 1keV calls slow neutron.
For the problem of the slow neutron detection device of prior art, embodiment of the disclosure proposes a kind of raising signal mistake
The slow neutron detection device of threshold probability.In accordance with an embodiment of the present disclosure, slow neutron detection device includes two slow neutron conversion bodies
And the read-out electrode silk group that is disposed there between and cathode filament group.By the reading electricity of wire electrode group etc of such as being stayed alone
Road is arranged between two slow neutron conversion bodies so that in the case where detector overall dimensions are constant, electronics drift distance drop
Half lower, improves the average of signal and crosses threshold probability.
Fig. 1 illustrates the axonometric chart of the slow neutron conversion body according to one example embodiment of the disclosure.Fig. 2 is illustrated shown in Fig. 1
Slow neutron conversion body sectional view.It should be understood that the structure that Fig. 1 and Fig. 2 schematically show only is the slow neutron according to the disclosure
A kind of example of conversion body, the disclosure are not limited to this.
As depicted in figs. 1 and 2, matrix 120 may include according to the slow neutron conversion body 100 of the disclosure.Matrix 120 may include
The insulation wall 122 for running through between multiple holes 124 and the plurality of hole of described matrix in the first direction.
Each hole 124 can have circular or polygonal cross-section.According to some embodiments, each hole has regular polygon
Section.According to other embodiments, each hole has regular hexagonal section and the plurality of hole is uniformly arranged, so as to described
Slow neutron conversion body has alveolate texture, as depicted in figs. 1 and 2, but disclosure not limited to this.Hole 124 can be used to fill
Ionization working gas, as described in detail by below.
As shown in Fig. 2 slow neutron conversion body 100 also includes the boron of the exposed surface at least covering the plurality of hole 124
Layer 126.According to some embodiments, boron layer 126 can be formed by dip-coating or other suitable modes.
Hole 124 can have smooth exposed surface so that cover matrix 122 boron layer have preferable uniformity and
Surface roughness (for example, the flatness less than 0.1 micron).
According to the disclosure, can usenatB (natural boron) or10B (purification boron) is used as slow neutron transition material.
According to some embodiments, matrix 120 has cube or rectangular shape, but disclosure not limited to this.
According to some embodiments, insulation wall 122 can be with the thickness in 1 micron to 50 micrometer ranges.For example, insulation wall can
With the thickness in 5 microns to 20 micrometer ranges.According to some embodiments, insulation wall 122 includes aramid paper.
Fig. 3 illustrates the curve of the slow neutron conversion body slow neutron detection efficient according to the disclosure and boron layer mass thickness relation
Figure.
If as shown in figure 3, usednatB is maintained at 0.232- as slow neutron transition material, the mass thickness of boron layer
(density 2.35g/cm when in the range of 0.694mg/cm23When, 1-3 μm of thickness of correspondence, preferably 1.6 μm), it is possible to achieve it is higher
Slow neutron detection efficient.
According to some embodiments, boron layer has 0.232-0.694mg/cm2Mass thickness.Further according to some embodiments,
The boron layer has 0.3-0.4mg/cm2Mass thickness.Further according to some embodiments, boron layer has 0.37mg/cm2Quality
Thickness.
Inventor has found that boron layer is too thin to cause the probability reacted with slow neutron to reduce, and boron layer is too thick can cause
The heavy charged particle that reaction is produced is difficult to cellular hole is entered from the coating of conversion body, and this can substantially reduce overall slow
Neutron detection effect.
Furthermore it is possible to the aperture of slow neutron conversion body is selected according to different application scenarios.According to some embodiments, hole
124 can have the inscribed circle diameter in the range of 0.1mm to 20mm.According to other embodiments, hole can have 3mm to 10mm models
Inscribed circle diameter in enclosing.When using in this application, inscribed circle is referred to can be with the most polygon tangent circle of hole.
Furthermore, it is possible to the height of slow neutron conversion body is selected according to different application scenarios, to take into account higher slow neutron
Detection efficient derives effect with preferable electronics.According to some embodiments, matrix 120 is with the height in the range of 1cm to 30cm.
For example, matrix 120 can have the height in the range of 4cm to 6cm.
According to some embodiments, the volume range of each of two slow neutron conversion bodies is 1-20000 cubic centimetres, institute
The diameter scope of hole 124 is stated in 1-10 millimeters.Moreover it is preferred that slow neutron conversion body can be with bottom surface as 10 cm x
10 centimetres, high 5 centimetres of cuboid painting boron slow neutron conversion body, a diameter of 3.6 millimeters of perforated holes 124.
According to some embodiments, can be by nanoscale boron powder uniform deposition be made cellular knot on aramid fiber paper base material
Structure, then the slow neutron conversion that aperture, length, boron layer thickness are satisfied by application scenarios requirement can be made through cutting and cutting
Body.
Fig. 4 schematically shows the structure chart of the slow neutron detection device according to one example embodiment of the disclosure.
As shown in figure 4, slow neutron detection device may include the first slow neutron conversion body 520 and the second slow neutron conversion body
530 and electric field protection silk group and negative and positive signal silk group 540.First slow neutron conversion body 520 and the second slow neutron conversion body 530 can
Being the slow neutron conversion body as described in front combination Fig. 1, Fig. 2 and Fig. 3.Slow neutron detection device also includes being arranged on described first
The upper cathode plate 510 of 520 one end of slow neutron conversion body and the lower negative electrode for being arranged on described second slow neutron conversion body, 530 one end
Pole plate 560.The cathode plate 510 protect the anode wire group in silk group and negative and positive signal silk group 540 to form electric field with electric field with
Electronics is driven to drift about to anode wire group.Similarly, the cathode plate 560 protects silk group and negative and positive signal silk group 540 with electric field
In anode wire group formed electric field with drive electronics to anode wire group drift about, as will be described in detail later.
As it was previously stated, the first slow neutron conversion body 520 and the second slow neutron conversion body 530 may each comprise matrix 120 and boron
Layer 126.Filling ionization working gas in multiple holes 124 of matrix 120, for producing electronics.Can laterally be expanded using electronics
The little working gas of scattered coefficient, makes horizontal proliferation of the electronics during drift is derived as far as possible little.According to some embodiments, ionization
Working gas can be 95% argon and 5% carbon dioxide mixed gas, but disclosure not limited to this, it is also possible to gas
Suitable working gas.
According to some embodiments, as shown in figure 4, slow neutron detection device may also include the field cage with cylindrical-shaped structure
550, the field cage 550 surrounds described two slow neutron conversion bodies 520 and 530.Field cage 550 may include multiple coaxial copper bands, institute
Multiple coaxial copper bands are stated for adding gradient voltage respectively.Field cage 550 can play a part of Isolated Shield, and can constrain internal gas
The equipotential surface of body environment forms approximate uniform electric field in most of region keeping parallelism.
Additionally, according to some embodiments, slow neutron detection device may also include protection ring (not shown).Protection ring can be arranged
Cage both sides on the scene, for providing the current potential of end flat, the realization to uniform electric field helps out.
Fig. 5 illustrates the structural representation of the read-out electrode and cathode filament group according to one example embodiment of the disclosure.Such as Fig. 5
It is shown, in order to construct, and the electronics drift pole that can pass through relative with cathode plate, some embodiments of the present disclosure
Used in one group of tinsel constitute electric field protection silk group 541 and 545, to completely cut off drift field and multiplication electric field, while do not hinder
The motion of electronics.As shown in Figure 5, it is contemplated that electrons from upper and lower both sides reach multiplication and sensing device 542,543 and 544, and
It is easy to use in large area field of detecting, in embodiment of the disclosure, adopts the technique construction electron multiplication of two-dimentional multifibres electrode
Device, i.e., constitute the first and second parallel cathode filament groups 542,544 place planes and anode wire group 543 place using three groups of silks flat
Face, wherein the direction of the wire electrode of the wire electrode and anode wire group 543 of the first and second cathode filament groups 542,544 is mutually perpendicular to,
Electron avalanche is realized using the highfield near anode wire, the electrons that snowslide is produced are collected by anode wire quickly, and produce
Cation can then drift about a segment distance, then be collected by the first and second cathode filament group 542,544.
As shown in Figure 4 and Figure 5, the first cathode filament group 542 includes a plurality of wire electrode of parallel arranged, and is arranged on first
Near first slow neutron conversion body one end between slow neutron conversion body 520 and the second slow neutron conversion body 530.Second cathode filament group
The 544 a plurality of wire electrodes for including parallel arranged, and it is arranged on the first slow neutron conversion body 520 and the second slow neutron conversion body
Near second slow neutron conversion body one end between 530.Read-out electrode silk group 543 includes a plurality of wire electrode of parallel arranged, work
For anode, and it is arranged on the first cathode filament group 542 and and the second cathode filament group 544 between, the read-out electrode silk group 543
The extension side of a plurality of wire electrode of a plurality of wire electrode and second electrode silk group 544 of a plurality of wire electrode and the first cathode filament group 542
To perpendicular.According to some embodiments, as anode wire group read-out electrode silk group 543 and the first cathode filament group 542 with
And second the silk spacing of cathode filament group 543 be 2-3mm, preferably 2mm, the silk spacing of anode wire group is 3-5mm, preferably
4mm。
As shown in Figure 5, slow neutron detection device also includes that the first electric field protects silk group 541 and the second electric field protection silk group
545.First electric field protection silk group 541 includes the wire electrode of a plurality of parallel arranged, is arranged on the first cathode filament group 542 and first slow
Between neutron conversion body 520.Second electric field protection silk group 545 includes the wire electrode of a plurality of parallel arranged, is arranged on the second negative electrode
Between silk group 544 and the second neutron conversion body 545.
Fig. 6 illustrates the operation principle of the slow neutron detection device according to the disclosure.Basis is described referring to Fig. 5 and Fig. 6
The operation principle of the slow neutron detection device of the disclosure.
As shown in fig. 6, three parts can be divided into according to the slow neutron detection process of the disclosure：Slow neutron absorbs electronics shape
Into the drift of, electronics, electron multiplication and signal collection.
Slow neutron absorbs the physical process in the stage of electronically forming to be occurred inside slow neutron conversion body.Incident slow neutron exists
Occur in boron layer 12610B (n, α)7Li react, produce heavy charged particle alpha-particle with7Li, their direction of motion it is contrary and be
It is equally distributed in 4 π solid angles.Therefore, the gaseous environment of cellular hole 124 is entered per the most only one of which particles of secondary response
In.When alpha-particle or7When Li is moved in the gaseous environment in hole 124, electronics can be produced by ionization sedimentary energy.
If these electronics are detected by detector, it becomes possible to form the corresponding signal of telecommunication.
In this link, slow neutron occurs when passing through boron layer 12610B (n, α)7The probability and alpha-particle of Li reactions,7Li enters
The average probability for entering hole 124 determines the possible slow neutron detection efficient of whole detector.As described previously with reference to described in Fig. 3, work as boron layer
Mass thickness be maintained at 0.232-0.694mg/cm2In the range of when (density 2.35g/cm3When, 1-3 μm of thickness of correspondence), can
To realize higher slow neutron detection efficient.
Due to the ionisation effect of heavy charged particle, the initial position that electronics is produced is distributed in each of whole slow neutron conversion body
The inside of individual cellular hole.To make these electronically form the signal of telecommunication of output, the scheme of the disclosure makes electronics float from hole
It is shifted out.As it was previously stated, electronics drifts about to one end of slow neutron conversion body under electric field driven, i.e., to electron multiplication and reading dress
Put 542,543,544 drifts.
Multiplication and sensing device 542,543,544 are reached from upper and lower both sides in view of electrons, and be easy to visit in large area
Survey field uses, and embodiment of the disclosure employs the technique construction electron multiplier of two dimension multifibres electrode as above, i.e.,
The first and second parallel cathode filament groups 542,543 place plane of 544 place planes and anode wire group are constituted using three groups of silks, its
In the direction of wire electrode of wire electrode and anode wire group 543 of the first and second cathode filament groups 542,544 be mutually perpendicular to, using sun
Highfield near polar filament realizes electron avalanche, and the electrons that snowslide is produced are collected by anode wire quickly, and the cation for producing
Then can be drifted about a segment distance, then be collected by the first and second cathode filament group 542,544.
There are two to apply boron thermal neutron conversion body 520 and 530 in the slow neutron detector of above-described embodiment, they share one
Electron avalanche and signal collection device, in plane symmetry relation.So design is caused in the case where detector profile is constant, most
Big electronics drift distance will drop by half, this for lifted detector detection performance it is helpful.
In order to remove Electronics noice and gamma-ray signal, all of gas neutron detector is required for setting certain threshold
Value, and in the case where threshold value seems constant with electron avalanche, the quality of electronics drift results then can affect to a great extent
Neutron detection efficiency.Fig. 7 gives the relation that electronics drift length and signal are crossed between threshold probability when threshold value determines, by Fig. 7
Understand, if a high neutron conversion body of 100mm is splitted into into two high conversion bodies of 50mm, and from middle read output signal, you can
Maximum drift distance is shorten to into 50mm from 100mm, then the average threshold probability of crossing of signal can lift 5%-10%.
The design that boron thermal neutron conversion body and middle multifibres read is applied with as escribed above, better performances can be made
Gas neutron detector.Compared to the detector using single new painting boron thermal neutron conversion body design, do not increasing detector
Electronics is shortened on the premise of volume and internal drift distance is changed in thermal neutron, can improve the overall detection effect of detector
Rate.
Although exemplary embodiment describing this utility model with reference to several, it is to be understood that, term used is explanation
With exemplary, and nonrestrictive term.As this utility model can be embodied as in a variety of forms without deviating from practical new
Type it is spiritual or substantive, it should therefore be appreciated that above-described embodiment is not limited to any aforesaid details, and should be in appended claims
Widely explain in the spirit and scope for being limited, therefore the whole changes in falling into claim or its equivalent scope and remodeling
All should be appended claims to be covered.
Claims (10)
1. a kind of slow neutron detection device, it is characterised in that include：
First slow neutron conversion body and the second slow neutron conversion body, the first slow neutron conversion body and second slow neutron turn
Change body to be configured to react with incident neutron, and produce electronics；
Electron multiplication and sensing device, are arranged between the first slow neutron conversion body and the second slow neutron conversion body,
The electronics is doubled and read.
2. slow neutron detection device as claimed in claim 1, it is characterised in that the electron multiplication and sensing device include：
First cathode filament group, including a plurality of wire electrode of parallel arranged, and it is arranged on the first slow neutron conversion body and institute
State between the second slow neutron conversion body near described first slow neutron conversion body one end；
Second cathode filament group, including a plurality of wire electrode of parallel arranged, and it is arranged on the first slow neutron conversion body and institute
State between the second slow neutron conversion body near described second slow neutron conversion body one end；
Read-out electrode silk group, including a plurality of wire electrode of parallel arranged, work as anode, and are arranged on first cathode filament
Group and and the second cathode filament group between, a plurality of wire electrode of the read-out electrode silk group is more with the first cathode filament group
The bearing of trend perpendicular of a plurality of wire electrode of strip electrode silk and the second electrode silk group.
3. slow neutron detection device as claimed in claim 2, it is characterised in that also include：
First cathode plate, is arranged on the other end of the first slow neutron conversion body relative to the first cathode filament group；
Second cathode plate, is arranged on the other end of the second slow neutron conversion body relative to the second cathode filament group.
4. slow neutron detection device as claimed in claim 2, it is characterised in that also include：
First electric field protects silk group, including the wire electrode of a plurality of parallel arranged, is arranged on the first cathode filament group and described the
Between one slow neutron conversion body；
Second electric field protects silk group, including the wire electrode of a plurality of parallel arranged, is arranged on the second cathode filament group and described the
Between two neutron conversion bodies.
5. slow neutron detection device as claimed in claim 2, it is characterised in that the read-out electrode silk group and the first cathode filament
Spacing between group and the second cathode filament group is 2-3 millimeters, and the spacing between a plurality of wire electrode of the read-out electrode is 3-5 millis
Rice.
6. slow neutron detection device as claimed in claim 2, it is characterised in that the first slow neutron conversion body and described
Each of two slow neutron conversion bodies includes：
Matrix, including run through hole along multiple holes that the direction vertical with a plurality of wire electrode place plane of the read-out electrode extends
And the insulation wall between the plurality of perforated holes；
Boron layer, at least covers the exposed surface of the plurality of perforated holes.
7. slow neutron detection device as claimed in claim 6, it is characterised in that the first slow neutron conversion body and described
The volume range of each of two slow neutron conversion bodies be 1-20000 cubic centimetres, the diameter scope of the perforated holes
In 1-10 millimeters.
8. slow neutron detection device as claimed in claim 7, it is characterised in that the first slow neutron conversion body and described
Each of two slow neutron conversion bodies is that bottom surface is 10 centimetres of 10 cm x, and high 5 centimetres of cuboid applies boron slow neutron conversion body,
A diameter of 3.6 millimeters of perforated holes.
9. slow neutron detection device as claimed in claim 8, it is characterised in that the coating thickness of boron layer is 1-3 microns, preferably
For 1.6 microns.
10. slow neutron detection device as claimed in claim 1, it is characterised in that also include：Field with cylindrical-shaped structure
Cage, the field cage surround the first slow neutron conversion body and the second slow neutron conversion body, and the field cage includes multiple same
Axle copper band, the plurality of coaxial copper band are used to add gradient voltage respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621054066.XU CN206057590U (en) | 2016-09-13 | 2016-09-13 | Slow neutron detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621054066.XU CN206057590U (en) | 2016-09-13 | 2016-09-13 | Slow neutron detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199680A (en) * | 2016-09-13 | 2016-12-07 | 清华大学 | Slow neutron detection device |
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2016
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199680A (en) * | 2016-09-13 | 2016-12-07 | 清华大学 | Slow neutron detection device |
| US10732306B2 (en) | 2016-09-13 | 2020-08-04 | Nuctech Company Limited | Slow neutron detection device |
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