CN105929441A - Microchannel plate type fast neutron position gas detector and detection method thereof - Google Patents
Microchannel plate type fast neutron position gas detector and detection method thereof Download PDFInfo
- Publication number
- CN105929441A CN105929441A CN201610458403.XA CN201610458403A CN105929441A CN 105929441 A CN105929441 A CN 105929441A CN 201610458403 A CN201610458403 A CN 201610458403A CN 105929441 A CN105929441 A CN 105929441A
- Authority
- CN
- China
- Prior art keywords
- gas
- microchannel
- fast neutron
- neutron
- mca
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T3/00—Measuring neutron radiation
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measurement Of Radiation (AREA)
Abstract
The invention provides a microchannel plate type fast neutron position gas detector and a detection method thereof, and relates to the field of nuclear technology applications. The detector comprises a gas chamber with an intake hole and an exhaust hole, a drift cathode, a microchannel structure plate, a gas electron multiplier, a high voltage dividing circuit, a read out PCB and a working gas. The drift cathode is arranged in the gas chamber with the intake hole and the exhaust hole. The microchannel structure plate is arranged below the drift cathode. The gas electron multiplier is arranged below the microchannel structure plate. The read out PCB is arranged below the gas electron multiplier. The working gas fills the whole chamber and a microchannel in the microchannel structure plate. The microchannel plate type fast neutron position gas detector provided by the invention can normally work at a high counting rate, and can be used for large part non-destructive detection and container scanning security check.
Description
Technical field
The present invention is general relates to Application of Nuclear Technology field, particularly field of non destructive testing.More particularly it relates to microchannel board-like fast neutron position gas detector and detection method thereof.
Background technology
Relative to X-ray, neutron has higher penetration capacity, this makes neutron imaging technology have broader practice prospect at the field of non destructive testing of big workpiece, and wherein fast neutron has the penetration capacity more higher than thermal neutron, is container scanning and the preferable probe of big workpiece flaw detection.
Polyethylene slow body is added3The conventional fast-neutron detection means of He absorbing medium, just due to3He makes cost rise violently for unsaturated vapor.And the position resolution that obtains based on this technological means that Moderation of the fast neutrons first detects thermal neutron again is the highest.It is badly in need of for this finding replacement scheme.
Method of nuclear recoil Used for Detecting Fast Neutrons based on hydrogenous materials such as polyethylene is classical way in the industry.The principle of this method is: fast neutron in polyethylene transformant with proton generation knock-out reaction, proton is pounded out and forms recoil proton, recoil proton can ionize ambient gas after escaping out polyethylene in flight course, produce electronic and ionic pair, electronics, ion under electric field action respectively toward anode and cathodic drift and induce signal.
Method of nuclear recoil detection efficient based on hydrogenous materials such as polyethylene is the highest.This is because for thicker polyethylene transformant, recoil proton is difficult to escape out from which, the thinnest for this transformant, it is the lowest that this makes again neutron pound out the probability of recoil proton.
And make based on above two detection method, the signal that the proportional counter tube commonly used at present is obtained mainly is contributed by cation.General slow three orders of magnitude than electronics due to positive ions drift speed, cause the signal collection time long, it is impossible to normally to work under high count rate.
Summary of the invention
It is an object of the present invention to provide a kind of without expensive gases3The fast neutron detector of He, to reduce cost, promotes the development of fast neutron imaging technology.
A further object of the invention is raising fast-neutron detection efficiency on the premise of based on the method for nuclear recoil.
Another of the present invention further objective is that the spatial resolution improving fast neutron while improving fast-neutron detection efficiency, to meet the demand of high-resolution precision neutron imaging.
Another of the present invention further objective is that the counting rate upper limit that raising fast neutron detector normally works under realizing object above premise.
In general, the present invention creatively uses following basic ideas to realize the above-mentioned purpose of the present invention, it may be assumed that utilizes hydrogenous material for transformant, forms medium as neutron signal.Utilize the feature that microchannel plate geometry upper channel is many, be evenly distributed, improve recoil proton and escape out the probability of transformant, and the electronics utilizing electric field to be ionized out in the channel by recoil proton pulls out passage, obtains signal subsequently.Solve neutron effect probability the most cleverly and contradiction that recoil proton escape probability mutually restricts, improve detection efficient.Utilize that microchannel plate geometry upper channel diameter is little, recoil proton in the shorter feature of solid material medium range, neutron signal is limited near incidence point, improves spatial resolution.And utilize the feature of gas electron multiplier amplification electron signal shielding ion signal, make the fast component that the detector signal overwhelming majority is constituted by electronic signal, eliminate the smear that cation brings, so individual signals acquisition time is greatly shortened, and remains to normally work under higher count rates.
For the new construction of the fast neutron detector that the invention proposes, the invention allows for a kind of new detection method, this fast neutron detector being to ensure that in the present invention can preferably realize above-mentioned purpose.
Detection method based on board-like fast neutron position, microchannel gas detector, comprises the following steps: in order to retain the positional information of fast neutron, need to ensure that transmission Neutron Beam has the preferable depth of parallelism.Neutron howitzer is placed between the gas detector of object to be imaged and described microchannel board-like fast neutron position, fast neutron through object to be imaged is collimated.After neutron howitzer, all of fast neutron flies almost along equidirectional.Utilize neutron howitzer so that the incident direction of Neutron Beam and MCA plate normal angle are limited at-5 ° ~ 5 °.Fast neutron pounds out recoil proton in MCA plate, recoil proton escapes in the microchannel of full working gas and ionizes out a large amount of electronic and ionic pair, electronics drifts out microchannel under the pull effect of electric field, subsequently enter and gas electron multiplier occurs snowslide amplify, and induce signal reading on PCB, electronic position is obtained, by the incident fast neutron in functional relation location of electronic position with fast neutron incoming position by signal location.
Specifically, board-like fast neutron position, the microchannel gas detector that the present invention provides includes: the gas chamber of band port, drift negative electrode, MCA plate, gas electron multiplier, high pressure bleeder circuit, reading PCB, working gas；Being provided with drift negative electrode in the gas chamber of described band port, the lower section of drift negative electrode is provided with MCA plate, and the lower section of MCA plate is provided with gas electron multiplier, and the lower section of gas electron multiplier is provided with reading PCB；Described working gas is full of the microchannel in whole chamber and MCA plate.
As preferably, the gas chamber of described band port is made up of aluminium or stainless steel.
As preferably, described drift negative electrode is made up of aluminium film.
As preferably, described MCA plate is made up of hydrogenous material；It is further preferable that MCA plate is made up of high density polyethylene (HDPE).
As preferably, described MCA plate is rectangular shape, and its cross section is rectangle, it is further preferable that be square.Described MCA plate contains the microchannel of some hollow, and microchannel is shaped as cylinder or cuboid, its cross section correspondingly, for circular or square.
As preferably, described working gas is based on inert gases such as argon gas, and is mixed with the quenching gas such as carbon dioxide or methane.Wherein inert gas proportion is 75% ~ 98%.
As preferably, the operating air pressure of described working gas is between 0.5atm ~ 1.5atm, it is further preferable that the operating air pressure of working gas is 1.0atm, and i.e. one standard atmospheric pressure.
As preferably, the anode playback mode of described reading PCB can be read, it is highly preferred that be micro-reading by micro-or disk array；In order to the spatial discrimination precision with detector is preferably arranged in pairs or groups, therefore it is further preferable that read on PCB every millimeter of at least reading bar of more than 1, for obtaining amplitude and the position of the signal that electronics induces on PCB.
As preferably, the quantity of described gas electron multiplier is 1 ~ 2, it is further preferable that the quantity of gas electron multiplier is one, single gas electron multiplier both end voltage is 300 ~ 600V.
As preferably, described high pressure bleeder circuit is drift negative electrode termination negative high voltage, other end ground connection.The diverse location being gas chamber by high pressure divider resistance string provides different negative high voltage, forms sizeable, direction by reading PCB and points to the electric field of drift negative electrode to control electronics, the transport behavior of ion, and for gas electron multiplier offer high pressure dividing potential drop.
As preferably, the material of described neutron howitzer is one or more in hydrogenous material, iron, lead.
As preferably, the geometry of described neutron howitzer is that microchannel is board-like.
As preferably, the incident direction of Neutron Beam and MCA plate normal angle are limited at-5 ° ~ 5 °.
As preferably, board-like fast neutron position, described microchannel gas detector also includes amplifying wave-shaping circuit, and it receives from reading the signal of telecommunication of PCB and it being amplified shaping；Delay circuit, carries out time delay to from the signal amplifying wave-shaping circuit；Flip-flop number circuit, extracting circuit for position provides triggering signal to trigger its work, counts signal pulse simultaneously；Circuit is extracted in position, processes the signal through time delay, extracts positional information, obtains the incoming position of neutron.
The described output amplifying wave-shaping circuit is connected with the input of delay circuit, and the output of delay circuit is connected with the input of position extraction circuit, and the input of position extraction circuit also output with flip-flop number circuit is connected.
Board-like fast neutron position, microchannel of the present invention gas detector has been completely free of expensive gases3The dependence of He.Without the need for any enriched isotope such as10B、6Li etc..Advantage of lower cost.
Particularly, board-like fast neutron position, microchannel of the present invention gas detector utilizes the geometry of microchannel plate, still ensure that proton Escape Probability is basically unchanged increasing while recoil proton produces probability, recoil proton and electronics are limited in the passage near incident fast neutron simultaneously, thus signal bondage near fast neutron incidence point, simple and effective achieve high position resolution ratio and high detection efficient.
Board-like fast neutron position, microchannel of the present invention gas detector normally can work under higher count rates, it is adaptable to the Non-Destructive Testing of big workpiece and container scanning safety check.
According to below in conjunction with the accompanying drawing detailed description to the preferred embodiment of the present invention, those skilled in the art will become more apparent from the above-mentioned of the present invention and other purposes, advantage and feature.
Accompanying drawing explanation
Hereinafter will be referring to the drawings with exemplary and the preferred embodiments of the present invention are described in detail by non-exclusive manner.Reference identical in accompanying drawing denotes same or similar parts or part.It will be understood by those skilled in the art that what these accompanying drawings were not necessarily drawn to scale.
Fig. 1 is the schematic block diagram of the present invention；
Fig. 2 is the top view of an embodiment of MCA plate in Fig. 1；
Fig. 3 is the schematic enlarged perspective of an embodiment of MCA plate in pie graph 1；
Fig. 4 is the detection process utilizing the panel detector structure after simplifying to schematically show fast neutron；
Fig. 5 is front-end electronics block diagram of the present invention.
Description of reference numerals:
Drift negative electrode 10, MCA plate 11, high pressure bleeder circuit 12, working gas 13, gas electron multiplier 14, reading PCB15, the gas chamber 16 of band port, incident neutron n, scattered neutron n ', recoil proton p, electronics e.
Detailed description of the invention
Fig. 1 is the schematic block diagram of board-like fast neutron position, microchannel in accordance with a preferred embodiment of the present invention gas detector.As it is shown in figure 1, board-like fast neutron position, microchannel gas detector comprises gas chamber 16, drift negative electrode 10, MCA plate 11, gas electron multiplier 14, high pressure bleeder circuit 12, reads PCB15 and working gas 13.
Specifically, gas chamber 16 provides an airtight working environment for detector, plays shielding action and is allowed to not disturbed by external electrical field.Fix drift negative electrode 10, MCA plate 11, gas electron multiplier 14 simultaneously, read the position of PCB15 and ensure accurate position relationship between them.Gas chamber 16 can be adapted to provide for closed environment and shielding external electric field function by any and be had the material of certain mechanical strength and make.Such as, stainless steel, aluminium are all the candidate materials manufacturing gas chamber 16.Owing to the neutron absorption cross-section of aluminium is lower, the most in a preferred embodiment of the invention, gas chamber 16 is made of aluminum.On the premise of meeting air-tightness and requirement of mechanical strength, gas chamber 16 should be the thinnest, and selects the relatively low material of self radioactivity as far as possible.As for concrete thickness, those skilled in the art are appropriately arranged with according to above-mentioned teaching in actual applications.
Drift negative electrode 10 is fixed in gas chamber 16, and connects negative high voltage.Drift negative electrode 10 material can be aluminium.
MCA plate 11 is fixed in the gas chamber 16 of band port, is positioned at immediately below drift cathode 10 and keeps level.Being filled with working gas in microchannel, whole MCA plate is in direction by the electric field reading PCB15 sensing drift negative electrode 10.
The material of MCA plate 11 is made up of hydrogenous material, as neutron transformant.This is because neutron and proton therein are had an effect can pound out recoil proton generation signal, therefore should select the material that hydrogeneous mass ratio is high and density is big as far as possible.Therefore select high density polyethylene (HDPE) in a preferred embodiment of the invention.
Referring to as in figure 2 it is shown, the geometry of MCA plate 11 can be cuboid, cylinder or square.It is cuboid in a preferred embodiment of the invention.
Fig. 3 is the schematic enlarged perspective of an embodiment of MCA plate 11 in pie graph 1.MCA plate 11 can be considered as the set of the minor structure shown in Fig. 3.Minor structure is the cuboid of the microchannel containing a hollow.Described microchannel is shaped as cylinder or cuboid, its cross section correspondingly, for circular or square.Such minor structure is arranged in parallel forms by many for MCA plate 11.The geometry of minor structure can be by thickness L, bore dia D, and channel center describes away from W, the most indirectly determines the geometry of MCA plate 11.When microchannel is shaped as cuboid, bore dia D should be understood by length of side D, lower same.
Process ensures the slickness of MCA plate 11 microchannel inner surface as much as possible, to reduce electric field distortion as far as possible.
It is emphasized that the key point of the present invention is that the geometry utilizing MCA plate 11 is to realize high detection efficient and high spatial resolution.Therefore the overall performance of detector is the most sensitive to the geometric parameter of above-mentioned minor structure.Further, present inventors appreciate that, position resolution is mainly determined away from W by bore dia D and channel center.Specifically, under certain bore dia D, increase channel center is away from W, can significantly reduce the range of recoil proton, make recoil signal concentrate on around incidence point.Bore dia D then limits the range of scatter of electronics, is equally beneficial for the concentration of signal, improves position resolution.Detection efficient is that channel center together decides on away from W by thickness L, bore dia D.Specifically, neutron detection efficiency is decided by that the generation rate of recoil proton, the escapement ratio of recoil proton and electronics go out the product of porosity three.Wherein the generation rate of recoil proton increases along with the increase of thickness L；The escapement ratio of recoil proton improves away from the reduction of W with channel center, and electronics goes out porosity and then increases along with the increase of bore dia D, reduces with the increase of thickness L.
Neutron source power spectrum in applying due to reality is different, therefore thickness L, bore dia D, and channel center is all adjustable in parameter away from W.It can be adjusted by those skilled in the art according to actual conditions.
Gas electron multiplier 14 (GEM, Gas Electron
Multiplier) it is positioned in the gas chamber 16 of band port, plays the effect amplifying signal.As it is shown in figure 1, it is positioned at the underface of MCA plate 11, and being provided high pressure by high pressure bleeder circuit 12, representative value is 300V ~ 600V, forms highfield in the hole of multiplier.Correspondingly, it is allowed to there is two or more gas electron multiplier 14 too low with reply signal amplitude, the situation that gain is inadequate.But increase gas electron multiplier 14 and may drag the time response of slow detector, and making bleeder circuit provide higher voltage, gas electron multiplier 14 only has one the most in a preferred embodiment of the invention.
High pressure bleeder circuit 12 terminates negative high voltage, other end ground connection at Drift electrodes 10.Suitable dividing potential drop is provided for whole detector.The electric-field intensity of diverse location in the gas chamber 16 of band port can be controlled, in order to preferably collect signal by the resistance reasonably arranging divider resistance.Utilize high pressure bleeder circuit 12 be gas electron multiplier 14 connect bleeder resistance can the yield value of effective stabilizing gas electron multiplier 14.This way is well known to those skilled in the art, and therefore it will not go into details herein.
Read PCB15 to be placed in the gas chamber 16 of band port, the amplitude information of position and correspondence in order to obtain signal.Reading and have reading anode on PCB15, playback mode can be read by micro-or disk array, is read by thin film field-effect pipe or CMOS reading is also feasible.Because micro-or disk array read the positional information that can obtain signal with lower unit cost, therefore as the preferred object of one embodiment of the present of invention.For the consideration of minimizing electronics way, it is highly preferred that be micro-reading.Read micro-the closeest, location fast neutron incoming position just can more accurately, but this also causes the signal amplitude on single reading bar to reduce.It is further preferred that read on PCB every millimeter of at least reading bar of more than 1.
The optional inert gas of working gas 13 being filled with cavity has neon, argon gas；Quenching gas has carbon dioxide and methane.In view of containing more proton in methane, being unfavorable for improving signal to noise ratio, the preferred gas component of one embodiment of the present of invention is argon gas and carbon dioxide, and wherein the volume ratio of argon gas is chosen as 75% ~ 95%.Add a small amount of polyatomic molecule gas to improve the drift velocity of electronics and weaken electrons spread effect and complex effect, there is quencher function simultaneously, prevent the electric discharge behavior of gas electron multiplier 14.But owing to mixing gas component adds the unstability of detector performance, so argon gas volume ratio is preferably 90% in one embodiment of the present of invention, preferably air pressure is a standard atmospheric pressure.
It addition, gaseous species and ratio in order to ensure working gas do not change, by pre-set gas mixed proportion, working gas can be persistently filled with by air admission hole by mass flow controller the gas chamber 16 of band port.
In order to realize high detection efficient and high spatial resolution, actual this detector of application also needs to combine certain detection method.Present inventors appreciate that, if neutron vertical incidence MCA plate 11, its positional information can be obtained the most accurately, but so a large amount of neutrons are not involved in reaction directly through microchannel, reduce detection efficient.Neutron is the most easily made to produce relatively multi signal in the position away from incidence point if incidence angle is excessive, although to improve detection efficient but be so unfavorable for position resolution, it is therefore desirable to rationally to select the angle of incident fast neutron and MCA plate 11.Therefore thus in one embodiment of the present of invention incident angle be preferably-5 ° ~ 5 °.
Neutron howitzer can have polyethylene, iron or lead etc. by material selection.For kinetic energy > fast neutron of 4MeV, generally select iron or lead, for the fast neutron that kinetic energy is less, generally select hydrogenous material such as polyethylene.Because the power spectrum of neutron source is often continuous print in actual application, therefore the material of neutron howitzer can be selected for the mixture of powders of above-mentioned material.Because this detector is insensitive to thermal neutron, therefore collimater only needs to consider the slowing down problem of fast neutron.Those skilled in the art in actual applications should be according to above-mentioned teaching, and the material component of neutron howitzer is made the appropriate adjustments by the neutron source for different power spectrums.
Neutron howitzer is placed between the gas chamber 16 of object to be imaged and band port, with object keeping parallelism to be imaged and with gas chamber 16 in an angle in order to ensure that incident direction and the MCA plate normal angle of Neutron Beam are limited at-5 ° ~ 5 °.This can be realized by material and the size of appropriate design neutron howitzer according to different neutron source.
As shown in Figure 4, a panel detector structure simplified is make use of to schematically show the detection process of fast neutron.After the fast neutron collimated through neutron howitzer injects MCA plate 11, hydrogenous material from which is pounded out recoil proton p and becomes scattered neutron n ', and scattered neutron n ' continues flight with the proton effect in MCA plate 11 until being absorbed or fly out MCA plate 11.The recoil proton p part pounded out has been stayed in MCA plate 11, and another part escapes out and ionizes out a large amount of electronics e in microchannel, electronics e is gone out passage by pulling under the effect of electric field, continue thereafter with drift and enter gas electron multiplier 14, there is snowslide under strong electric field, producing a large amount of electronics, these electronics e continues to drift about to anode direction under the effect of electric field subsequently, and induces signal in reading PCB15.
Referring to as it is shown in figure 1, board-like fast neutron position, microchannel gas detector is near the plane of incidence that one end of drift negative electrode is fast neutron, the fast neutron collimated through neutron howitzer is injected from the direction.MCA plate 11 is along its thickness direction, near the incident fast neutron of drift negative electrode one end reception.
Additionally, in other embodiments of the present invention, can be using board-like fast neutron position, apllied for present invention microchannel gas detector as a detector cells, according to being actually needed the multiple such unit of flexible configuration to meet imaging needs.
Referring to as it is shown in figure 5, front-end electronics is divided into two-way, a road is flip-flop number circuit, extracts circuit offer triggering signal from drawing signal near the gas electron multiplier 14 read PCB15 as position, counts signal pulse simultaneously.Another road is to amplify wave-shaping circuit, and it receives from reading the signal of telecommunication of PCB15 and it being amplified shaping；Delay circuit, carries out time delay to from the signal amplifying wave-shaping circuit so that extracts circuit in position and receives and be just admitted to position extraction circuit from signal after the triggering signal of flip-flop number circuit；Circuit is extracted in position, processes the signal through time delay, extracts positional information, the online incoming position obtaining neutron.
The general principle of the present invention and principal character and advantages of the present invention have more than been shown and described.Skilled person will appreciate that of the industry; the present invention is not restricted to the described embodiments; being intended merely to described in above-described embodiment and specification preferably illustrates the principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements both fall within scope of the claimed invention.Claimed scope is defined by appending claims and equivalent thereof.
Claims (9)
1. the board-like fast neutron in microchannel position gas detector, it is characterised in that it includes the gas chamber of band port, drift negative electrode, MCA plate, gas electron multiplier, high pressure bleeder circuit, reads PCB, working gas；Being provided with drift negative electrode in the gas chamber of described band port, the lower section of drift negative electrode is provided with MCA plate, and the lower section of MCA plate is provided with gas electron multiplier, and the lower section of gas electron multiplier is provided with reading PCB；Described working gas is full of the microchannel in whole chamber and MCA plate；Described high pressure bleeder circuit is positioned at outside the gas chamber of band port, drift negative electrode termination negative high voltage, other end ground connection.
2. the detection method of the board-like fast neutron in microchannel position gas detector, it is characterised in that it comprises the following steps: in order to retain the positional information of fast neutron, need to ensure that transmission Neutron Beam has the preferable depth of parallelism；Neutron howitzer is placed between the gas detector of object to be imaged and described microchannel board-like fast neutron position, fast neutron through object to be imaged is collimated；Transmission fast neutron through neutron howitzer flies almost along equidirectional；Utilize neutron howitzer so that the incident direction of Neutron Beam and MCA plate normal angle are limited at-5 ° ~ 5 °；Fast neutron pounds out recoil proton in MCA plate, recoil proton escapes in the microchannel of full working gas and ionizes out a large amount of electronic and ionic pair, electronics drifts out microchannel under the pull effect of electric field, subsequently enter and gas electron multiplier occurs snowslide amplify, and induce signal reading on PCB, electronic position is obtained, by the incident fast neutron in functional relation location of electronic position with fast neutron incoming position by signal location.
Board-like fast neutron position, microchannel the most according to claim 1 gas detector, it is characterised in that: the gas chamber of described band port is made up of aluminium or stainless steel.
Board-like fast neutron position, microchannel the most according to claim 1 gas detector, it is characterised in that: described MCA plate is made up of hydrogenous material；It is further preferable that MCA plate is made up of high density polyethylene (HDPE).
Board-like fast neutron position, microchannel the most according to claim 4 gas detector, it is characterized in that: described MCA plate is rectangular shape, and its cross section is rectangle, and wherein microchannel is shaped as cylinder or cuboid, its cross section correspondingly, for circular or square.
Board-like fast neutron position, microchannel the most according to claim 1 gas detector, it is characterised in that: described working gas is based on inert gases such as argon gas, and is mixed with the quenching gas such as carbon dioxide or methane, and wherein inert gas proportion is 75% ~ 98%.
Board-like fast neutron position, microchannel the most according to claim 1 gas detector, it is characterised in that the operating air pressure of described working gas is 0.5atm ~ 1.5atm.
Board-like fast neutron position, microchannel the most according to claim 1 gas detector, it is characterised in that the quantity of described gas electron multiplier is 1 ~ 2.
Board-like fast neutron position, microchannel the most according to claim 1 gas detector, it is characterized in that: described reading PCB, the playback mode of its anode is that micro-bar shaped reads, and read on PCB every millimeter of at least reading bar of more than 1, it is used for obtaining signal amplitude and the position that electronics induces on reading PCB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610458403.XA CN105929441A (en) | 2016-06-22 | 2016-06-22 | Microchannel plate type fast neutron position gas detector and detection method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610458403.XA CN105929441A (en) | 2016-06-22 | 2016-06-22 | Microchannel plate type fast neutron position gas detector and detection method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105929441A true CN105929441A (en) | 2016-09-07 |
Family
ID=56831102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610458403.XA Pending CN105929441A (en) | 2016-06-22 | 2016-06-22 | Microchannel plate type fast neutron position gas detector and detection method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105929441A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106610510A (en) * | 2016-12-27 | 2017-05-03 | 同方威视技术股份有限公司 | Method for imaging of fast neutrons, and detection system |
| CN108873052A (en) * | 2017-05-15 | 2018-11-23 | 东芝电子管器件株式会社 | Neutron position detector |
| CN112255666A (en) * | 2020-10-23 | 2021-01-22 | 中国工程物理研究院激光聚变研究中心 | Neutron sensitive microchannel plate |
| CN112255664A (en) * | 2020-10-23 | 2021-01-22 | 中国工程物理研究院激光聚变研究中心 | Microchannel type fast neutron image detector |
| CN112269204A (en) * | 2020-10-23 | 2021-01-26 | 中国工程物理研究院激光聚变研究中心 | Microchannel type fast neutron flight time detector |
| CN112363202A (en) * | 2020-12-01 | 2021-02-12 | 重庆建安仪器有限责任公司 | Neutron source three-dimensional positioning method and system |
| CN114660096A (en) * | 2022-04-14 | 2022-06-24 | 中国工程物理研究院材料研究所 | Method for testing thermal neutron shielding performance of material |
| CN115950920A (en) * | 2023-03-16 | 2023-04-11 | 中国科学技术大学 | Micro-structure gas detector based on micro-fluidic technology and preparation method thereof |
| CN118033715A (en) * | 2024-04-11 | 2024-05-14 | 南京航空航天大学 | Particle beam current variable measuring device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002236194A (en) * | 2001-02-08 | 2002-08-23 | Toshiba Corp | Method and device for evaluating burn-up |
| US20110042577A1 (en) * | 2009-08-21 | 2011-02-24 | Hugh Robert Andrews | Fast neutron detector having an open-structured hydrogenous radiator |
| CN103091702A (en) * | 2009-08-28 | 2013-05-08 | 中国科学院高能物理研究所 | Double-layer gadolinium-doped impedance board detector and neutron detecting method thereof |
| CN104111471A (en) * | 2013-04-18 | 2014-10-22 | 中国科学院高能物理研究所 | Neutron detector and neutron detection method |
| CN105445779A (en) * | 2015-12-29 | 2016-03-30 | 清华大学 | Slow neutron conversion body and slow neutron detector |
-
2016
- 2016-06-22 CN CN201610458403.XA patent/CN105929441A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002236194A (en) * | 2001-02-08 | 2002-08-23 | Toshiba Corp | Method and device for evaluating burn-up |
| US20110042577A1 (en) * | 2009-08-21 | 2011-02-24 | Hugh Robert Andrews | Fast neutron detector having an open-structured hydrogenous radiator |
| CN103091702A (en) * | 2009-08-28 | 2013-05-08 | 中国科学院高能物理研究所 | Double-layer gadolinium-doped impedance board detector and neutron detecting method thereof |
| CN104111471A (en) * | 2013-04-18 | 2014-10-22 | 中国科学院高能物理研究所 | Neutron detector and neutron detection method |
| CN105445779A (en) * | 2015-12-29 | 2016-03-30 | 清华大学 | Slow neutron conversion body and slow neutron detector |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106610510A (en) * | 2016-12-27 | 2017-05-03 | 同方威视技术股份有限公司 | Method for imaging of fast neutrons, and detection system |
| CN108873052A (en) * | 2017-05-15 | 2018-11-23 | 东芝电子管器件株式会社 | Neutron position detector |
| CN112255666A (en) * | 2020-10-23 | 2021-01-22 | 中国工程物理研究院激光聚变研究中心 | Neutron sensitive microchannel plate |
| CN112255664A (en) * | 2020-10-23 | 2021-01-22 | 中国工程物理研究院激光聚变研究中心 | Microchannel type fast neutron image detector |
| CN112269204A (en) * | 2020-10-23 | 2021-01-26 | 中国工程物理研究院激光聚变研究中心 | Microchannel type fast neutron flight time detector |
| CN112363202A (en) * | 2020-12-01 | 2021-02-12 | 重庆建安仪器有限责任公司 | Neutron source three-dimensional positioning method and system |
| CN114660096A (en) * | 2022-04-14 | 2022-06-24 | 中国工程物理研究院材料研究所 | Method for testing thermal neutron shielding performance of material |
| CN115950920A (en) * | 2023-03-16 | 2023-04-11 | 中国科学技术大学 | Micro-structure gas detector based on micro-fluidic technology and preparation method thereof |
| CN118033715A (en) * | 2024-04-11 | 2024-05-14 | 南京航空航天大学 | Particle beam current variable measuring device |
| CN118033715B (en) * | 2024-04-11 | 2024-06-25 | 南京航空航天大学 | Particle beam current variable measuring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105929441A (en) | Microchannel plate type fast neutron position gas detector and detection method thereof | |
| Obayashi et al. | In situ 207 Pb/206 Pb isotope ratio measurements using two Daly detectors equipped on an ICP-mass spectrometer | |
| CN104111471B (en) | Neutron detector and neutron detection method | |
| Yang et al. | Experimental research on a THGEM-based thermal neutron detector | |
| CN111257922B (en) | BF with wide energy spectrum 3 Long neutron counter measuring system | |
| Spence et al. | Vibrational excitation and compound states in NO | |
| Jun-Jun et al. | 3D simulation of micromegas detector performance | |
| US4264816A (en) | Ionization chamber | |
| CN106970412A (en) | A kind of MCP neutron detectors based on polyethylene | |
| Borggreen et al. | Production and Decay Properties of Protactinium Isotopes of Mass 222 to 225 Formed in Heavy-Ion Reactions | |
| CN108873053A (en) | A kind of neutron and gamma-rays joint detector | |
| Prasad et al. | Thomson spectrometer–microchannel plate assembly calibration for MeV-range positive and negative ions, and neutral atoms | |
| Bai et al. | A method for measuring the electron drift velocity in working gas using a Frisch-grid ionization chamber | |
| Wen et al. | A multi-layered fast ionization chamber prototype for fission cross section measurements | |
| CN206515476U (en) | A kind of neutron tube | |
| CN206975229U (en) | A kind of MCP neutron detectors based on polyethylene | |
| US3009063A (en) | Gas analysis | |
| CN109283570B (en) | Method for measuring drift velocity of electrons in gas with external electric field | |
| CN106680863A (en) | Neutron tube | |
| CN208721796U (en) | A kind of neutron and gamma-rays joint detector | |
| Nicodemus et al. | Fission neutron spectrum of U 235 | |
| Alfonsi et al. | Advances in fast multi-GEM-based detector operation for high-rate charged-particle triggering | |
| Xin et al. | Experimental research on beam current extraction of PIG negative hydrogen ion source for neutron tube | |
| Pancin et al. | Secondary electrons detectors for beam tracking: micromegas and wire chamber | |
| US20150001413A1 (en) | Device for detecting neutrons |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160907 |
|
| RJ01 | Rejection of invention patent application after publication |