CN109541671A - A kind of high-resolution neutron photography system - Google Patents
A kind of high-resolution neutron photography system Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T3/00—Measuring neutron radiation
- G01T3/06—Measuring neutron radiation with scintillation detectors
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Abstract
The invention discloses a kind of high-resolution neutron photography systems, including neutron source, collimator and as detector system, the neutron source includes ion source and target, the neutron beam that the neutron source generates is linear, the implementation of the linear neutron beam of neutron source generation is any one in following two mode: first way is that the fairlead of the ion source is the multiple circular holes of slit or arrangement on one wire；The second way is that the fairlead of the ion source is single round hole, and the target is V-shaped；When using first way, the collimator and the picture detector system are laid out in ion beam current vertical direction, and when using the second way, the collimator and the picture detector system are laid out in ion beam current direction.High-resolution neutron photography system of the invention has neutron source compact, moves, and ion beam current is high by force, and neutron source strength is high, and target beam spot section is small, the high feature of photographic resolution.
Description
Technical field
The present invention relates to the technical fields of neutron photography, relate in particular to a kind of high-resolution neutron photography system.
Background technique
Neutron photography category ray field of non destructive testing, neutron photography are the bases that can decay when passing through object based on ray
Present principles.Neutron photography have the advantages that the characteristics of other non-destructive testing technologies can not be substituted and, X-ray detection decaying it is close with material
Degree is related, and neutron photography is then related to the action section of substance, thus neutron photography has solely in the context of detection of light material
Special advantage.
The composition of neutron photography system mainly has three parts: neutron source-collimator-is as detector system.It is shone as neutron
There are mainly three types of the neutron sources of phase: pile neutron source, accelerator neutron generator, isotope neutron source.Pile neutron source stream is strong
Height usually can obtain very high Collimation Ratio for thermal neutron radiography, to obtain higher resolution ratio, but cost is high, running cost
With high, equipment is huge and expensive, large-scale reactor construction thermal neutron radiography system can only be relied on, lacks flexibility；Isotope
Neutron source is small in size, easy to operate, but neutron yield is especially low, it is difficult to obtain high-quality photograph.Accelerator neutron generator can be straight
It connects for fast neutron radiography, neutron target spot is small not to need special neutrons collimation system, is carried out in fast neutron radiography first choice
Component, but for accelerator neutron generator, Collimation Ratio and target beam spot diameter, are conflict, target beam spot diameter, and neutron source strength
It is also conflict, high-resolution neutron photography usually requires that high neutron intensity, beam spot increase Collimation Ratio small as far as possible, and target spot
The heat flow density that smaller then target is born is larger, and high source strength can then generate very big beam power on target and cause heat dissipation pressure big,
Huge challenge is brought to accelerator art.Therefore, a challenge of fast neutron radiography technology is that neutron source strength is difficult to improve.
There are two types of the mode of acceleration type neutron source raising neutron intensity is usual, first is that ion beam energy is improved, second is that increasing
Add ion beam current strong.It improves ion beam energy and usually requires multistage acceleration system to several MeV, such as RFQ accelerates, it is difficult to realize
Miniaturization, raising ion beam current is strong, then increases target heat dissipation pressure, it is difficult to reduce beam spot.
The effect of collimator is to improve neutron beam quality, and theoretically accelerator neutron generator carries out fast neutron radiography and do not need standard
Straight shielding, but from protection as detector and its electronics element angle, it is necessary to it is collimated, obtaining, suitable collimatied beam is same
When, it can also cause neutron beam power spectrum to change, while increasing gamma-ray contamination.
As the neutron transfer efficiency of detector is another key influence factor of neutron photography system, there are detection efficients
With the contradiction of resolution ratio, in order to improve the detection efficient to fast neutron, frequently with thicker conversion screen, and thick screen then will lead to resolution
Rate decline.
Summary of the invention
Technical problem to be solved by the invention is to provide in a kind of high-resolution with lesser neutron beam spot section
Sub- photographic system.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme: a kind of high-resolution neutron photography system,
Including neutron source, collimator and as detector system, the neutron source includes ion source and target, the neutron that the neutron source generates
Beam is linear, and the neutron source generates the implementation of linear neutron beam as any one in following two mode:
First way is that the fairlead of the ion source is the multiple circular holes of slit or arrangement on one wire；
The second way is that the fairlead of the ion source is single round hole, and the target is V-shaped；
When using first way, the collimator and the picture detector system are laid out in ion beam current vertical direction,
When using the second way, the collimator and the picture detector system are laid out in ion beam current direction.
Further, the collimator includes interior collimator and outer collimator, and the interior collimator is placed in the neutron source
Inside, the outer collimator is placed in the outside of the neutron source.
Further, multiple suckings are provided on the hole wall of the collimating aperture of the outer collimator.
Further, the collimating aperture of the collimator is in inner small and outside big taper, and the hole of the collimating aperture of the collimator
Wall extending line intersection point covers whole target spots of the neutron source.
Further, the ion source further include vaccum case and be arranged between the ion source and the target
One electrode and acceleration electrode, the ion source, the target, the first electrode and the acceleration electrode are shielded in the vacuum
In shell, the vaccum case ground connection, the target is fixed in the vaccum case by insulating supporting, the first electrode,
Negative high voltage is connect outside the vaccum case by the insulating supporting with the acceleration electrode.
Further, the ion source is ecr ion source or RF ion source, and educt beaming flow is deuterium line or the mixing of deuterium tritium
Line.
Further, the neutron source further includes the beam acceleration transmission system being arranged between the ion source and the target
System, the beam acceleration Transmission system is accelerated using single gap electrostatic or Multiple level segmentation electrostatic repeats accelerated mode, the beam
It includes first electrode and acceleration electrode that stream, which accelerates Transmission system,.
Further, the target is equipped with the thin channel of capillary, and the target is radiated using jet impulse and capillary
The type of cooling that thin channel heat dissipation combines, the section in the thin channel of capillary is square or circle, the capillary are thin
The diameter in channel is 0.5~1mm.
Further, described to be made of as detector system neutron convert screen, optical transmission medium and imaging system, it is described at
As system is silicon photomultiplier array.
Further, the neutron convert screen is to the sensitive plastic scintillant of fast neutron, and plastic scintillant is interior hydrogeneous
The plastic scintillant containing deuterium of atom, the plastic scintillant of carbon atom or interior hydrogen atoms, carbon atom and D-atom.
The beneficial effects of the present invention are embodied in:
The neutron source that the present invention uses is accelerator neutron generator, small in size, is easy to move, but this accelerator neutron generator
There are problems that beam spot size (Collimation Ratio) when intensity is high, there are contradictions with power density, to solve this problem, this hair
Bright design neutron source generates linear neutron beam, and specifically devises two kinds of implementations, can get lesser neutron beam spot section,
The present invention can be used for space flight, the neutron photography of nuclear power system scene.
Detailed description of the invention
Fig. 1 is the structural schematic diagram (first way) of one embodiment of the invention.
Fig. 2 is the structural schematic diagram (second way) of one embodiment of the invention.
Fig. 3 is the structural schematic diagram of collimator in one embodiment of the invention.
Fig. 4 is the structural schematic diagram in one embodiment of the invention as detector system.
Fig. 5 is the structural schematic diagram of V-arrangement target in one embodiment of the invention.
The label of each component in attached drawing are as follows: 1 neutron source, 2 collimators, 21 suckings, 3 are as detector system, 31 neutrons turn
Screen, 32 optical transmission mediums, 33 imaging systems, 4 ion sources, 5 first electrodes, 6 acceleration electrodes, 7 targets, 71 capillaries are changed carefully to lead to
Road, 8 insulating supportings, collimator, 10 outer collimators, 11 vaccum cases in 9.
Specific embodiment
It is next below with reference to the accompanying drawings that the present invention will be described in detail.It should be noted that in the absence of conflict, in the application
Embodiment and embodiment in feature can be combined with each other.
Referring to Fig. 1 to Fig. 5.
High-resolution neutron photography system of the present invention, including neutron source 1, collimator 2 and as detector system 3, it is described in
Component 1 includes ion source 4 and target 7, and the neutron beam that the neutron source 1 generates is linear, and the neutron source generates linear neutron beam
Implementation be following two mode in any one:
First way is that the fairlead of the ion source 4 is the multiple circular holes of slit or arrangement on one wire；
The second way is that the fairlead of the ion source 4 is single round hole, and the target 7 is V-shaped；
When using first way, the collimator 2 and the picture detector system 3 are laid out in ion beam current Vertical Square
To when using the second way, the collimator 2 and the picture detector system 3 are laid out in ion beam current direction.
The neutron source that the present invention uses is accelerator neutron generator, small in size, is easy to move, but this accelerator neutron generator
There are problems that beam spot size (Collimation Ratio) when intensity is high, there are contradictions with power density, to solve this problem, this hair
Bright design neutron source generates linear neutron beam, and specifically devises two kinds of implementations, can get lesser neutron beam spot section.
Corresponding to the lead-out mode of the multiple circular holes of slit or arrangement on one wire, small bore threadiness can be formed on target
Beam spot, therefore the shape that the ion beam after focusing dissipates on target remains as a linear source, ion beam intensity is that single hole draws
The multiple of intensity out, linear ion beam spot is formed on target can increase heating surface area, avoid beam spot and concentrate upper on one point produce
Raw high density hot-fluid reduces the heat dissipation pressure of target while capable of increasing educt beaming flow.In this way, detection imaging system is set
Setting the line neutron source observed in target side is a point.
Corresponding to the lead-out mode of single round hole, round spot is formed on target, by the way of V-arrangement target, line connects on V target surface
Contacting surface product is big, so that the small heat dissipation pressure for reducing target of thermal power densities, detection imaging system are arranged on rear side of V-arrangement target, observe
Target spot be a round spot.
In one embodiment, the collimator 2 includes interior collimator 9 and outer collimator 10, and the interior collimator 9 is placed in institute
The inside of neutron source 1 is stated, the outer collimator 10 is placed in the outside of the neutron source 1.During collimator is used to for neutron source being emitted
Beamlet is collimated, and high-quality neutron beam is obtained, and collimator uses interior collimator and outer collimator mode dimerous, can
Improve Collimation Ratio.
Preferably, the internal layer of the collimator 2 using high ordinal number metal material to reflected neutron, hanker by outer one layer of use
The sub- biggish material of absorption cross-section obtains harder neutron energy spectrum, outermost layer to reduce the thermal neutron share in outgoing neutron
The γ that activation generates is absorbed using high ordinal number.
Preferably, multiple suckings 21 are provided on the hole wall of the collimating aperture of the outer collimator 10, so that γ is absorbing
It is absorbed in hole through Multiple Scattering, multiple suckings in outer collimator can effectively reduce γ, improve neutron beam quality, reduce back
Scape scattering improves signal-to-noise ratio, and collimated neutron beam is radiated on sample, transmission neutron and neutron convert screen interaction, shape
Fluorescence is excited in neutron screen at recoil proton, through optical system coupled in imaging system, exports picture signal.
In one embodiment, the collimating aperture of the collimator 2 is in inner small and outside big taper, and the collimation of the collimator 2
The hole wall extending line intersection point in hole covers whole target spots of the neutron source 1.The advantages of designing in this way is target spot in detection imaging system
In the visual field of system, the collimation efficiency of neutron source is improved, and then improve the quality of neutron beam.
In one embodiment, the ion source 4 further includes vaccum case and is arranged in the ion source 4 and the target 7
Between first electrode 5 and accelerate electrode 6, the ion source 4, the target 7, the first electrode 5 and the accelerations electrode 6 are
In the vaccum case, the vaccum case ground connection, the target 7 is fixed on the vaccum case by insulating supporting 8 for shielding
Interior, the first electrode 5 and the acceleration electrode 6 pass through the insulating supporting 8 and connect negative high voltage outside the vaccum case.
Neutron source is designed to high-tension shielding type, all high voltage component shieldings of neutron source inside vacuum chamber, are not required to by this design
Large-scale insulating element and farther away insulation distance are set outside neutron source, while accelerated mode uses electrostatic acceleration side
Formula is realized using all solid state acceleration fields generation circuit, can be realized using novel small size high voltage power supply chip, further be subtracted
Small neutron source peripheral components volume, so that neutron source is compact-sized removable.
In specific implementation, neutron source is not necessarily to isolating transformer, so that overall structure is more using acceleration integrated design is drawn
It is compact；The ion source of neutron source is multicusp type, can draw to generate high stream intense ion beam with multi beam, can it is farther away from
From longer linear ion beam is formed, bombardment target piece generates neutron.
In specific implementation, ion source uses four electrode lead-out process of interior insulation negative high voltage, improves the focusing of extraction system
Ability reduces beam emittance, solves the problems, such as that high-current beam is drawn.Electrostatic accelerated mode is real with all solid state acceleration fields generation circuit
Existing, which has a high acceleration efficiency compared with traditional accelerated mode, big acceleration electric current and the advantages of compared with less trouble,
The miniaturization for being conducive to accelerate high voltage power supply, further realizes the compact design of neutron source system.
7 end of target inhibits secondary electron to improve line using acceleration electrode 6 as screening filtering cover.Accelerate electrode and target electrode
Cooling working medium be deionized water, insulating supporting 8 is using small, the high pressure resistant material of deflation rate.
In one embodiment, the ion source 4 is ecr ion source or RF ion source, and educt beaming flow is deuterium line or deuterium
Tritium mixing line.The advantages of designing in this way is can to draw big line with ecr ion source or RF ion source, using deuterium line or
DD the and DT nuclear reaction that the target practice of deuterium tritium combined beam generates can realize high yield in low energy, big line situation.Low energy ion
Beam can accelerate integrated design to realize using drawing, without dedicated accelerating tube or RF power fed-in power supply, so that
Neutron source more compact structure.
In one embodiment, the neutron source 1 further includes that the line being arranged between the ion source 4 and the target 7 adds
Fast Transmission system, the beam acceleration Transmission system is accelerated using single gap electrostatic or Multiple level segmentation electrostatic repeats acceleration side
Formula, the beam acceleration Transmission system include first electrode 5 and acceleration electrode 6.Advantage of this is that ion beams to use
Four electrode lead-out process improve the focusing capability of extraction system, reduce beam emittance, solve the problems, such as that high-current beam is drawn,
Electrostatic accelerated mode realizes which has high acceleration compared with traditional accelerated mode with all solid state acceleration fields generation circuit
Efficiency, big acceleration electric current and the advantages of compared with less trouble are conducive to the miniaturization for accelerating high voltage power supply, further realize neutron
The compact design of source system.
In one embodiment, the target 7 is equipped with the thin channel 71 of capillary, the target 7 using jet impulse heat dissipation and
The type of cooling that the thin channel heat dissipation of capillary combines, the section in the thin channel 71 of capillary is square or circle, described
The diameter in the thin channel 71 of capillary is 0.5~1mm.The advantages of designing in this way is increased heat exchange area, reduces target surface
Heat flow density realizes effective heat dissipation of target.
Preferably, the target 7 is using planar shaped or scarf or V-arrangement or taper, it is possible to increase line generates on target to be cut
Face reduces heat dissipation pressure.Target cooling structure uses jet stream and the thin channel high efficiency and heat radiation technology of capillary.
In one embodiment, described as detector system 3 is by neutron convert screen 31, optical transmission medium 32 and imaging system 33
Composition, the imaging system 33 is silicon photomultiplier array.Advantage of this is that with good fast neutron discrimination capabilities
With very high photon sensitivity, enough optical signals can be provided for record by imaging system, are reduced statistical error, are preferably mentioned
Neutron photography defect characteristic is taken out, image quality is improved.
In one embodiment, the neutron convert screen 31 is to the sensitive plastic scintillant of fast neutron, and plastic scintillant is
The plastic scintillant containing deuterium of interior hydrogen atoms, the plastic scintillant of carbon atom or interior hydrogen atoms, carbon atom and D-atom.
The advantages of designing in this way is to be conducive to background examination, effective Used for Detecting Fast Neutrons.
Without limitation to 1 reaction type of neutron source, optionally, neutron source 1 is DD neutron source or DT neutron source to the present invention.
The ion source 4 of neutron source 1 of the present invention uses ECR or RF ion source, and ion beam is D beam or D, T combined beam, neutron source
Ion beam is drawn using ecr ion source or RF ion source, aperture is drawn and is less than 6mm, beam spot diameter, is drawn and is less than 6mm, ion adds
Speed adds and subtracts speed system using four electrodes, and directly bombardment target generates neutron, ion source voltage 60-160kV, and line is greater than 30mA,
It can generate higher than 1012N/s neutron yield, accelerates 6 acceleration energy of electrode in 60-160kV, and target 7 is formed certainly using Ti target, Mo target
At target or DTi target, TTi target.
The present invention is that single hole is drawn or porous extraction on one wire is drawn or arranged to slit to the ion source of neutron source,
When being drawn with single hole, with the neutron beam photograph of rear end extraction, collimator 2 and as detector system 3 is located at the target 7 of neutron source 1
Rear end, when with slit extraction or porous extraction, with the neutron beam photograph laterally drawn, collimator 2 and as detector system 3
In 7 side of target of neutron source 1, in specific implementation, each extraction aperture is 2mm, acceleration distance 15cm in porous extraction, and target spot is long
Degree is in 3-50cm, and beam spot diameter of section is in 2-10mm.
The acceleration system single gap electrostatic of neutron source 1 accelerates or Multiple level segmentation electrostatic repeats accelerated mode, when using single
When the electrostatic accelerated mode of gap, using four electrode acceleration and deceleration structures, totally one accelerating gap, acceleration voltage are -155kV, are slowed down
Voltage is -150kV, and ion source is drawn and the high voltage component of acceleration system is sealed in vacuum chamber, ion source acceleration and deceleration institute
The high pressure needed, which is connected to by insulation cable from the high voltage power supply outside vacuum chamber, to be introduced on internal high pressure component.
Collimator 2 uses divergence form, and in 1-5cm, length is by iron, tungsten, Boron-containing-PE in 30-200cm for entrance hole diameter
With the compound collimator of lead composition.Collimator is made of inside and outside collimator, and interior collimator is placed in inside neutron source vacuum chamber, interior
Collimator entrance is placed in outside neutron source vacuum chamber apart from target spot 1-3cm, inlet diameter 1cm, outer collimator, length 1m,
Outlet diameter 20cm, Collimation Ratio can reach 100.Collimator is internally provided with multiple suckings, and each sucking is diameter 2-4cm
Hemisphere.
As detector system 3 is saturating with sample using Plastic scintillation screen, light-guiding system and silicon photomultiplier array, scintillation screen
It hits sub- generation recoil effect and generates recoil proton, recoil proton sedimentary energy generates ionization and issues light to excitation fluorescent material
Son is collected through light-guiding system and is imported on silicon photomultiplier array.
The BC400 that Plastic scintillation screen is produced using company, Saint-Gobain, peak wavelength are located at 423nm, and selected
Silicon photomultiplier array peak wavelength matches.The scintillator used in the implementation case is having a size of 100mm × 100mm
×10mm。
The S13361 model that silicon photomultiplier array is produced using Bin Song company, photosensitive area are 3mm × 3mm,
Each array totally 8 × 8 channels, can be collected into 64 signals, peak wavelength is in 450nm or so, and other parameters: gain is reachable
1.7×106, dark counting 1200kHz, dark current 618nA, operating voltage < 30V, the 300ps ultrafast rise time, most narrow 600ps arteries and veins
Width is rushed, for needing rapid time to differentiate the case where is capable of providing optimal time response.In order to match with scintillation screen, altogether
Using 30 × 30 silicon photomultiplier arrays, single channel be can recognize having a size of 0.375mm.
Scintillator is connect with silicon photomultiplier using light guide, and silicon photomultiplier is connected from scintillator end face by light guide
It connects, sealing is protected from light.Silicon photomultiplier output signal passes through preamplifier, and the weak current of silicon photomultiplier output is believed
The voltage signal with some strength number is converted to, realizes and the wideband low noise of photogenerated current is amplified, passes through and screens shaping electricity
Road is converted to digital pulse signal for analog signal is exported, and is output in PC machine and is handled using counter calculating pulse.
Neutron source 1, collimator 2 and as modularized design can be used in detector system 3, can integrated and disassembly more
It changes, is integrally placed on the vehicles and is moved to detection scene.Entire neutron photography various parts use modularized design, can collect
Integralization, it is also detachable and interchangeable.It can be placed on the vehicles such as automobile, truck, steamer.
The invention has the benefit that
1 present invention is directed to requirement of the on-site test to neutron photographic means compact, and neutron source is designed to high-tension shielding
All high voltage component shieldings of neutron source inside vacuum chamber, are not needed to be arranged outside neutron source large-scale by type, this design
Insulating element and farther away insulation distance, while accelerated mode use electrostatic accelerated mode, generated using all solid state acceleration fields
Circuit is realized, can be realized using novel small size high voltage power supply chip, be further decreased neutron source peripheral components volume, make
It is compact-sized removable to obtain neutron source.
2 ion sources draw place using slit or more circular holes are drawn, and ion beam current can be made to form linear beam spot on target, avoided
Beam spot concentrate it is upper on one point generate high density hot-fluid, the heat dissipation pressure of target is reduced while educt beaming flow can be increased.
3 photographic systems are arranged in the vertical direction of ion beam current, are taken a picture using the neutron beam laterally drawn, and obtain in threadiness
The small bore of component can obtain high source strength and small target spot simultaneously, improve neutron photography resolution ratio.
4 imaging systems use high efficiency neutron convert screen and silicon photomultiplier array, and there is good fast neutron to screen
Ability and very high photon sensitivity can provide enough optical signals for record by imaging system, reduce statistical error, more preferably
Ground extracts neutron photography defect characteristic, improves image quality.
5 entire neutron photography various parts use modularized design, can integrated and dismounting and change, integrally set
It is live in being moved to detection on the vehicles.
High-resolution neutron photography system of the invention has neutron source compact, moves, ion beam current is high by force, neutron source
Intensity is high, and target beam spot section is small, the high feature of photographic resolution, solves to accelerate that type neutron photography device volume is huge to be difficult to move
It moves scene and carries out neutron photography detection, high current and target beam spot contradiction are difficult to the problem of obtaining high-resolution.
It should be understood that example as described herein and embodiment are not intended to restrict the invention, this field only for explanation
Technical staff can make various modifications or variation according to it, all within the spirits and principles of the present invention, made any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of high-resolution neutron photography system, it is characterised in that: including neutron source (1), collimator (2) and as detector system
It unites (3), the neutron source (1) includes ion source (4) and target (7), it is characterised in that: the neutron beam that the neutron source (1) generates
Linear, the neutron source (1) generates the implementation of linear neutron beam as any one in following two mode:
First way is that the fairlead of the ion source (4) is the multiple circular holes of slit or arrangement on one wire；
The second way is that the fairlead of the ion source (4) is single round hole, and the target (7) is V-shaped；
When using first way, the collimator (2) and picture detector system (3) are laid out in ion beam current Vertical Square
To when using the second way, the collimator (2) and picture detector system (3) are laid out in ion beam current direction.
2. high-resolution neutron photography system according to claim 1, it is characterised in that: the collimator (2) includes interior
Collimator (9) and outer collimator (10), the interior collimator (9) are placed in the inside of the neutron source (1), the outer collimator
(10) it is placed in the outside of the neutron source (1).
3. high-resolution neutron photography system according to claim 2, it is characterised in that: the standard of the outer collimator (10)
Multiple suckings are provided on the hole wall of straight hole.
4. high-resolution neutron photography system according to claim 1 or 2 or 3, it is characterised in that: the collimator (2)
Collimating aperture be in inner small and outside big taper, and the hole wall extending line intersection point of the collimating aperture of the collimator (2) covers the neutron
Whole target spots in source (1).
5. high-resolution neutron photography system according to claim 1 or 2 or 3, it is characterised in that: the ion source (4)
It further include vaccum case (11) and the first electrode (5) being arranged between the ion source (4) and the target (7) and acceleration electricity
Pole (6), the ion source (4), the target (7), the first electrode (5) and the acceleration electrode (6) shield described true
In empty capsid (11), vaccum case (11) ground connection, the target (7) is fixed on the vaccum case by insulating supporting (8)
(11) in, the first electrode (5) and the acceleration electrode (6) pass through the insulating supporting (8) from the vaccum case (11)
Outside connects negative high voltage.
6. high-resolution neutron photography system according to claim 1 or 2 or 3, it is characterised in that: the ion source (4)
It is ecr ion source or RF ion source, educt beaming flow is deuterium line or deuterium tritium mixing line.
7. high-resolution neutron photography system according to claim 1 or 2 or 3, it is characterised in that: the neutron source (1)
It further include the beam acceleration Transmission system being arranged between the ion source (4) and the target (7), beam acceleration transmission system
System is accelerated using single gap electrostatic or Multiple level segmentation electrostatic repeats accelerated mode, and the beam acceleration Transmission system includes first
Electrode (5) and acceleration electrode (6).
8. high-resolution neutron photography system according to claim 1 or 2 or 3, it is characterised in that: set on the target (7)
There are the thin channel of capillary (71), the cooling that the target (7) is combined using jet impulse heat dissipation and the thin channel heat dissipation of capillary
The section of mode, the thin channel of capillary (71) is square or circle, the diameter of the thin channel of capillary (71) are
0.5~1mm.
9. high-resolution neutron photography system according to claim 1 or 2 or 3, it is characterised in that: described as detector system
System (3) is made of neutron convert screen (31), optical transmission medium (32) and imaging system (33), and the imaging system (33) is silicon light
Electric multiplier tube array.
10. high-resolution neutron photography system according to claim 9, it is characterised in that: the neutron convert screen (31)
It is to the sensitive plastic scintillant of fast neutron, plastic scintillant is the plastic scintillant of interior hydrogen atoms, carbon atom, or includes
The plastic scintillant containing deuterium of hydrogen atom, carbon atom and D-atom.
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| CN201910074993.XA CN109541671A (en) | 2019-01-25 | 2019-01-25 | A kind of high-resolution neutron photography system |
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| CN111982940A (en) * | 2020-08-14 | 2020-11-24 | 兰州大学 | Thermal neutron transmission imaging method and imaging device based on compact D-D neutron source |
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| CN114236600A (en) * | 2021-11-25 | 2022-03-25 | 西北核技术研究所 | Neutron beam monitoring system based on silicon carbide detector |
| CN114401579A (en) * | 2021-12-21 | 2022-04-26 | 中国科学院近代物理研究所 | Fast spot scanning method, system and medium for high-power particle beam with strong current |
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