CN103091702A - Double-layer gadolinium-doped impedance board detector and neutron detecting method thereof - Google Patents
Double-layer gadolinium-doped impedance board detector and neutron detecting method thereof Download PDFInfo
- Publication number
- CN103091702A CN103091702A CN 201310009607 CN201310009607A CN103091702A CN 103091702 A CN103091702 A CN 103091702A CN 201310009607 CN201310009607 CN 201310009607 CN 201310009607 A CN201310009607 A CN 201310009607A CN 103091702 A CN103091702 A CN 103091702A
- Authority
- CN
- China
- Prior art keywords
- detector
- gadolinium
- resistive
- electrode
- voltage
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 30
- 239000011159 matrix material Substances 0.000 claims abstract description 28
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 54
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims description 54
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 52
- 229910002804 graphite Inorganic materials 0.000 claims description 52
- 239000010439 graphite Substances 0.000 claims description 52
- 238000002156 mixing Methods 0.000 claims description 22
- 238000001228 spectrum Methods 0.000 claims description 20
- 230000005251 gamma ray Effects 0.000 claims description 12
- 230000001815 facial effect Effects 0.000 description 15
- 239000011248 coating agent Substances 0.000 description 13
- 238000000576 coating method Methods 0.000 description 13
- 230000005684 electric field Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000001035 drying Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 239000011162 core material Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 238000011068 loading method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000003292 glue Substances 0.000 description 4
- 229920000877 Melamine resin Polymers 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002285 radioactive effect Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229940075613 gadolinium oxide Drugs 0.000 description 1
- 229910001938 gadolinium oxide Inorganic materials 0.000 description 1
- CMIHHWBVHJVIGI-UHFFFAOYSA-N gadolinium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[Gd+3].[Gd+3] CMIHHWBVHJVIGI-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000011163 secondary particle Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000010215 titanium dioxide Nutrition 0.000 description 1
Images
Landscapes
- Measurement Of Radiation (AREA)
Abstract
The invention discloses a double-layer gadolinium-doped impedance board detector and a neutron detecting method thereof. A structure of two layers of detectors is adopted. Discrimination of whether an external charge particle is a thermal neutron is achieved due to the fact that different working voltage is loaded by the two layers of detectors. Numerical reading electrodes on two sides of each layer of detectors are massive matrix electrodes, and then location of a thermal neutron current can be discriminated clearly.
Description
The application is for, application number that submit on August 28th, 2009 is 200910169723.3, denomination of invention is divided an application for China's application of " a kind of detector of mixing the resistive plate of gadolinium and formation thereof ".
Technical field
The present invention relates to gas detector, relate in particular to a kind of method that bilayer is mixed the resistive partitioned detector of gadolinium and detected neutron thereof.
Background technology
Resistive partitioned detector is a kind of gas detector for surveying high energy particle, the resistive plate of the insulation that resistive partitioned detector of the prior art directly utilizes high bulk resistivity loads working voltage and forms applied electric field, when the irradiation of outside incident particle or pass through resistive partitioned detector, will inner certain the regional working gas of the resistive partitioned detector of ionization and produce ionizing particle; Ionizing particle is under the highfield effect that is formed by the operate outside high pressure that is loaded into graphite electrode, and then the generation snowslide is amplified and the time amplifies, and produces avalanche signal or time signal.
The structure of resistive partitioned detector as shown in Figure 1, the parallel placement of two blocks of resistive plates 1, apply the uniform graphite electrode 2 of one deck as negative electrode and the anode of power supply at the outside surface of described two blocks of resistive plates 1 respectively, the insulating material 3 at the skin of graphite electrode 2 by one deck be connected with printed circuit board signal electrode 4.After outside incident particle ionizes interior certain the regional working gas of the resistive partitioned detector of this structure, ionizing particle and then generation snowslide are amplified and the time amplifies, after producing avalanche signal or time signal, can cause simultaneously the variation of electric field on the anodic-cathodic respective regions surface of this resistive plate, these induced charge small parts are fallen by resistive plate Absorption of Medium, all the other major parts are at this insulating material 3 of process, to induce corresponding signal on printed circuit board (PCB) reading electrode 4, hit the characteristics such as position, induced charge and time response with what this knew incident particle.
Different from high energy charged particles and high-energy photon, electromagnetic interaction, ionization or exciting media atom take coulomb interaction as medium can not occur with the detector medium in neutron; Also not can with medium generation photoelectric effect, Compton scattering etc., so neutron is difficult for by direct detection, be generally that the nuclear scattering that occurs by the atomic nucleus with the detector medium or nuclear reaction realize the detection to neutron.
Common thermal neutron detector is generally the very high imaging detector of positional precision, and not only useful detection area is little, and expensive, is unfavorable for that monitor large-area has the ambient field of neutron irradiation.
Summary of the invention
One object of the present invention is to provide a kind of and is easy to the large tracts of land of large-scale production, bilayer is mixed the resistive partitioned detector of gadolinium cheaply, allowing to telling thermal neutron from the multiparticle source,
Bilayer according to the present invention is mixed the resistive partitioned detector of gadolinium and is comprised: the first detector of two parallel connections and the second detector, wherein said the first detector comprises respectively two in opposite directions with described the second detector and two graphite electrodes that right resistive plate, a side are connected with the outside of described two blocks of resistive plates respectively and two reading electrodes that are connected with the opposite side of described two graphite electrodes by a dielectric film respectively, described two blocks of resistive plates at least one of them for mixing the resistive plate of gadolinium; The reading electrode that wherein said the first detector is adjacent with described the second detector is a public reading electrode, and the reading electrode that is positioned at the reading electrode of described the first detector outside and is positioned at described the second detector outside is all the matrix electrodes that is made of a plurality of matrix units; The operating voltage of the operating voltage of described the first detector and described the second detector has certain voltage difference.
According to one embodiment of present invention, mix in the resistive plate of gadolinium at described bilayer, the graphite electrode of the graphite electrode of described first detector adjacent with described public reading electrode and described the second detector loads identical voltage respectively, and another graphite electrode of another graphite electrode of described the first detector and described the second detector loads different voltage.
According to another embodiment of the invention, the voltage on described another graphite electrode that is carried in described the first detector and the voltage difference that is carried between voltage on another graphite electrode of described the second detector are 500-1000V.
The present invention also provides a kind of and adopts above-mentioned bilayer to mix the method that the resistive partitioned detector of gadolinium is surveyed thermal neutron, and described method is: respectively described the first detector is loaded different operating voltage with described the second detector; When outside incident particle and described bilayer are mixed the resistive detector of gadolinium and are reacted, whether judgement is positioned at the signal amplitude spectrum that the matrix unit at any opposite position place of described the first detector and described the second detector exports consistent, be that the described outside incident particle in described this matrix unit position is gamma-ray photon or other particle, otherwise be thermal neutron at the described outside incident particle of described this matrix unit position.
As shown from the above technical solution, embodiments of the invention are by adopting bilayer to mix the detector that the resistive plate of gadolinium is made into, thereby can tell thermal neutron from the multiparticle source, have following beneficial effect:
1, the described resistive plate material of gadolinium of mixing is hydrocarbon substance, is good moderation of neutrons body, and insensitive to the γ photon, can screen out well thermal neutron;
2, described employing is mixed the resistive plate of gadolinium to consist of the geometry of detector simple, range of size is very wide, can make the very large detector of area, than other detectors, detector of the present invention is cheap, and be easy to large-scale production, and can make large tracts of land, wall formula detector cheaply, realize the monitoring to the environmental neutron background.
3, can adopt the form of two-layer panel detector structure, whether be thermal neutron, and the position that can further more clearly differentiate thermal neutron by the reading electrode that adopts the Block matrix electrode if respectively the different operating voltage of two-layer detector loading being differentiated outside charged particle.
By referring to the accompanying drawing description of a preferred embodiment, above-mentioned and other objects, features and advantages of the present invention will be more obvious.
Description of drawings
Fig. 1 is the structural representation of resistive partitioned detector in prior art;
Fig. 2 is that the present invention adopts the signal amplitude spectrum of mixing gadolinium resistive plate detected neutron source and gamma-ray photon source.
Fig. 3 is that the present invention adopts the signal amplitude spectrum peak position central value of mixing gadolinium resistive plate detected neutron source and gamma-ray photon source with the change curve of operating voltage;
Fig. 4 is a kind of structural representation of mixing the resistive plate of gadolinium of the present invention;
Fig. 5 is the structural representation that an embodiment of the present invention is mixed the resistive partitioned detector of gadolinium;
Fig. 6 is the schematic diagram that individual layer shown in Figure 5 is mixed a kind of matrix structure graphite electrode of the resistive partitioned detector of gadolinium;
Fig. 7 is the schematic diagram that individual layer shown in Figure 5 is mixed a kind of matrix structure reading electrode of the resistive partitioned detector of gadolinium;
Fig. 8 is the structural representation that the another kind of embodiment bilayer of the present invention is mixed the resistive partitioned detector of gadolinium;
Fig. 9 is the schematic diagram that bilayer shown in Figure 8 is mixed a kind of matrix structure reading electrode of the resistive partitioned detector of gadolinium.
Embodiment
The below will describe specific embodiments of the invention in detail.Should be noted that the embodiments described herein only is used for illustrating, be not limited to the present invention.
Before describing the present invention in detail, take identification neutron source and gamma-ray photon source as example, illustrate that first the resistive partitioned detector of gadolinium of mixing of the present invention screens out the principle of thermal neutron from different particles here.
At resistive partitioned detector perform region loading different operating voltage, can form different electric fields in resistive partitioned detector subrange, and the gadolinium atom amplifies the degree varies sample from snowslide, the time of multiparticle effect in different electric fields of thermal-neutron reaction, the signal amplitude that detects is also different, therefore mix the resistive partitioned detector of gadolinium when the different operating high pressure, accept the irradiation in neutron source and gamma-ray photon source, the amplitude spectrum that it detects is different, as shown in Figure 2.Under the different operating condition of high voltage, the amplitude spectrum of mixing the gamma-ray photon that the resistive partitioned detector of gadolinium detects is more stable, and the amplitude spectrum of the neutron source that detects increases gradually with the raising of detector working voltage.
Above-mentioned amplitude spectrum is carried out Gauss curve fitting, obtains its amplitude spectrum peak position central value data, its along with the variation tendency of different operating high pressure as shown in Figure 3.Seeing when the working voltage of resistive partitioned detector reaches nominal working conditions clearly continue to increase working voltage, the gamma-ray photon that it detects amplitude spectrum substantially no longer change, but the amplitude spectrum of the neutron source that detects is increase tendency all the time.Can simply select different working voltages thus, simultaneously detected neutron source and gamma-ray photon radioactive source, the difference of its amplitude spectrum peak position relatively can realize the examination to neutron source and gamma-ray photon source.
Therefore, the invention provides a kind of resistive partitioned detector, this detector adopts mixes the resistive plate of gadolinium, to the different operating voltage of this detector perform region loading, make the reaction of thermal neutron and gadolinium, according to the difference of sensing the signal amplitude spectrum from this detector readings electrode, tell thermal neutron from outside incident particle.
Before the resistive partitioned detector of explanation the present invention, in conjunction with the structure of mixing the resistive plate of gadolinium shown in Figure 4, the manufacture craft of mixing the resistive plate of gadolinium is once described first.
As shown in Figure 4, mix the resistive plate of gadolinium and be divided into three layers, one deck is to mix gadolinium coating facial tissue 41, and one deck is common facial tissue 43, at common facial tissue 43 with to mix between gadolinium coating facial tissue 41 be one deck inner core material 42.
Particularly, mixing gadolinium coating facial tissue 41 makes through the following steps: the gadolinium oxide powder is blended in glue, by the intaglio printing technology, it is transferred on facial tissue, complete the printing of mixing the gadolinium coating after drying; Printed with above-mentioned the impregnation that the facial tissue of mixing the gadolinium coating carries out the melamine glue, made its surface apply one deck melamine glue again, dry and semi-solid preparation, become and mix gadolinium coating facial tissue 41 through drying oven.Mixing the thickness of gadolinium coating can regulate by the concentration, print pass, the scraper of intaglio press and the methods such as spacing of facial tissue that change glue.Coating thickness will affect absorption layer to the detection efficiency of neutron.
Particularly, facial tissue 43 adopts the special-purpose titanium white facing paper of decorative panel, and impregnated melamine resin also solidifies through drying oven is dry, becomes facial tissue 43.
Particularly, inner core material 42 adopts electric insulation impregnated paper dipping phenolics, carries out drying and semi-solid preparation through drying oven, becomes inner core material 42.
Above-mentioned each layer make complete after, after then mixing gadolinium coating facial tissue 41, inner core material 42, facial tissue 43 and stack successively according to method shown in Figure 4, be pressed into composite laminate with plating polishing stainless steel template 44 through High Temperature High Pressure, for mixing the resistive plate of gadolinium.Between pressed material and presed-steel plate, can add release agent 45, can improve thus the surface smoothness of resistive plate.
Here should be noted that the dry solidification situation of mixing gadolinium coating facial tissue 41, inner core material 42, facial tissue 43 will affect resistive plate body resistivity, regulate its drying time in drying oven, can complete the control to resistive plate material body resistivity.And in the one-body molded pressing process of above-mentioned High Temperature High Pressure, by adjusting temperature, pressure, press time, the performances such as body resistivity that will regulate resistive plate material.
Adopt the above-mentioned detector that the resistive plate of gadolinium is made of mixing, according to a specific embodiment of the present invention, its concrete structure mainly comprises two blocks of resistive plates, two graphite electrodes and two reading electrodes as shown in Figure 5.Wherein two blocks of resistive plates 51 in opposite directions and right, wherein scribble on resistive plate and mix gadolinium coating 56, can form air gap 55 by pad in the middle of two-layer resistive plate; Load operating voltage for respectively two blocks of resistive plates 51 by two graphite linings 52, one of them graphite electrode loads the voltage of noble potential, another piece graphite electrode loads the voltage (graphite electrode of noble potential is also referred to as the anode graphite electrode, and the graphite electrode of electronegative potential is also referred to as the negative electrode graphite electrode) of electronegative potential; Two reading electrodes 54 insulate by dielectric film 53 and graphite linings 52 respectively, the reading electrode adjacent with the anode graphite electrode is anode reading electrode, the reading electrode adjacent with the negative electrode graphite electrode is negative electrode reading electrode, and negative electrode reading electrode is generally complete grounding copper membrane electrode.
The operating voltage of described two noble potentials that graphite electrode loads and electronegative potential, the pressure reduction of its noble potential and electronegative potential need to satisfy makes detector can be operated in condition under streamer mode, difference according to the resistive plate material body resistivity that adopts, its working voltage is different, preferably, this working voltage of mixing the resistive partitioned detector of gadolinium is more than 7000v.
Preferably, two blocks of resistive plates in the detector in said structure can adopt mixes the resistive plate of gadolinium, so that more improve the performance of detector.
Described detector produces ionizing particle with inner certain the regional working gas of the resistive partitioned detector of ionization when having the particle of certain energy (charged particle, gamma-ray photon) to shine or passing through; Ionizing particle is under the highfield effect that is formed by the operate outside high pressure that is loaded into graphite electrode, and then the generation snowslide is amplified and the time amplifies, and produces avalanche signal or time signal.When thermal neutron line 57 incident irradiation are mixed certain perform region of the resistive partitioned detector of gadolinium, thermal neutron can occur wink to send out nuclear reaction with the gadolinium atom mixed in the gadolinium coating in this perform region, produces the secondary particles such as Auger electron, gamma-rays, X ray, internal conversion electron.These secondarys are equally at the inner negative ions pair of can ionization working gas producing of this detector, under the highfield effect, and then occur that snowslide is amplified or the time amplifies, and form avalanche signal or time signal.A neutron is captured the effect that nuclear reaction occurs to send out in wink by gadolinium, be equivalent to the effect of a plurality of charged particles or a plurality of gamma-ray photon incident simultaneously same position.
When resistive partitioned detector works in steady state (SS), when non-neutron streaming irradiation, the time signal magnitude that produces in its detector will be irrelevant in incident particle, and the signal amplitude spectrum that its reading electrode is sensed will be not change with the variation of working voltage.And when thermal neutron incident, will with detector inside mix gadolinium coating generation neutron death, occur wink to send out nuclear reaction, produce a plurality of secondarys, due to the multiparticle effect, its signal amplitude of responding on the detector readings electrode will be with the difference of working voltage difference to some extent.The operating voltage that loads by changing graphite electrode, the signal 58 that the observed reading electrode induces, if the increase along with operating voltage, the amplitude spectrum of induced signal is more stable, this external particles source is not thermal neutron, if instead along with the increase of operating voltage, the amplitude spectrum of read output signal also increases gradually, and this external particles source is thermal source.
Above-mentioned employing detector is differentiated in the method for thermal neutron, need constantly to change the operating voltage of detector, and the operating voltage of detector loads by two graphite electrodes, in order more clearly to tell the position of hankering subflow, according to another embodiment of the invention, the anode graphite electrode is divided into the electrode of Block matrix type, different matrix units loads different voltage, realize loading different operating voltage in same detector regional area with this, thereby form different electric fields in zones of different.
As shown in Figure 6, the anode graphite electrode is divided into intersection adjacent a plurality of category-A graphite electrodes 61 and a plurality of category-B graphite electrode 62, and the quantity of category-A graphite electrode 61 and category-B graphite electrode 62 is decided according to the precision of the position that requires, and position accuracy demand is higher, and its quantity is more.Category-A graphite electrode and category-B graphite electrode are respectively by category-A high-tension cable 63 and category-B high-tension cable 64 on-load voltages, the voltage that it loads is different, in order to be easy to the variation of observation signal amplitude spectrum, preferably, category-A graphite electrode and category-B graphite electrode on-load voltage have the voltage difference of 500-1000V.
Correspondingly, the reading electrode also needs to be the Block matrix shape, concrete structure as shown in Figure 7, the reading electrode also is divided into a plurality of category-A reading electrodes 71 and a plurality of category-B reading electrode 72, corresponding one by one with the position of category-A graphite electrode 61 and a plurality of category-B graphite electrodes 62 respectively, category-A reading electrode 71 corresponding A class graphite electrodes 61 load high pressure and form the signal that electric field produces; The corresponding category-B graphite electrode 62 of category-B reading electrode 71 loads high pressure and forms the signal that electric field produces.Here export the signal of a plurality of category-A reading electrodes 71 and a plurality of category-B reading electrodes 72 by category-A signal cable 73 and category-B signal cable 74, whether the category-A reading electrode by adjacent position relatively and the signal amplitude of category-B reading electrode output compose to differentiate incident particle is thermal neutron.Certainly can be combined as with 4 matrix units of adjacent position one here and survey junior unit, a, b, c, d matrix unit in as shown in Figure 7 are combined as a probe unit.A, electric field corresponding to d matrix unit are different from the electric field of b, c matrix unit, so can differentiate radioactive source to the similarities and differences of identical radioactive source detection amplitude spectrum by them, whether the thermal neutron composition are arranged.
according to another specific embodiment of the present invention, can adopt the form of two-layer panel detector structure, whether respectively the different operating voltage of two-layer detector loading is differentiated outside charged particle is thermal neutron, concrete structure is as shown in 8, two detectors are placed side by side, wherein the detector in left side is the first detector, the detector on right side is the second detector, the first detector and the second detector all adopt structure shown in Figure 5, the public reading electrode 87 of the first detector and the second detector wherein, in general, public reading electrode is ground-electrode, can adopt the monoblock copper sheet with resistive plate formed objects.Two-layer detector is not identical by the operating voltage that graphite electrode loads, here in the present invention, the voltage that not necessarily requires each graphite electrode of two-layer detector to load is not identical, can have according to concrete high-pressure insert different load modes, such as, can adopt same high-pressure insert to load same low-potential voltage to the graphite electrode of two-layer detector electronegative potential, has certain potential difference (PD) as long as satisfy the operating voltage that two-layer detector loads, preferably, the pressure reduction that has 500-1000V.
What note here is, four resistive plates 81 in two-layer detector can be all for mixing the resistive plate of gadolinium, can be also any one resistive plate in each detector with mixing the resistive plate replacement of gadolinium, specifically decide as circumstances require.in order more clearly to tell the position of hankering subflow, another reading electrode that is positioned at both sides of the first detector and the second detector adopts the Block matrix electrode, as shown in Figure 9, each matrix unit 91 is drawn signal by different signal cable 92, the amplitude spectrum of more two-layer like this detector same position place matrix unit (laying respectively at the matrix reading electrode unit of the corresponding identical public reading electrode position of both sides), if find that the amplitude spectrum of certain matrix unit output is inconsistent, show that this matrix unit position is thermal source, otherwise, quite different.
Although described the present invention with reference to several exemplary embodiments, should be appreciated that term used is explanation and exemplary and nonrestrictive term.The spirit or the essence that do not break away from invention because the present invention can specifically implement in a variety of forms, so be to be understood that, above-described embodiment is not limited to any aforesaid details, and should be in the spirit and scope that the claim of enclosing limits explain widely, therefore fall into whole variations in claim or its equivalent scope and remodeling and all should be the claim of enclosing and contain.
Claims (4)
1. a bilayer is mixed the resistive partitioned detector of gadolinium, it is characterized in that, comprising:
The first detector of two parallel connections and the second detector, wherein said the first detector comprises respectively two in opposite directions with described the second detector and two graphite electrodes that right resistive plate, a side are connected with the outside of described two blocks of resistive plates respectively and two reading electrodes that are connected with the opposite side of described two graphite electrodes by a dielectric film respectively, described two blocks of resistive plates at least one of them for mixing the resistive plate of gadolinium;
The reading electrode that wherein said the first detector is adjacent with described the second detector is a public reading electrode, and the reading electrode that is positioned at the reading electrode of described the first detector outside and is positioned at described the second detector outside is all the matrix electrodes that is made of a plurality of matrix units;
The operating voltage of the operating voltage of described the first detector and described the second detector has certain voltage difference.
2. detector according to claim 1, it is characterized in that, the graphite electrode of the graphite electrode of described first detector adjacent with described public reading electrode and described the second detector loads identical voltage respectively, and another graphite electrode of another graphite electrode of described the first detector and described the second detector loads different voltage.
3. detector according to claim 2, is characterized in that, the voltage on described another graphite electrode that is carried in described the first detector and the voltage difference that is carried between voltage on another graphite electrode of described the second detector are 500-1000V.
4. an employing such as the described bilayer of claim 1-3 any one are mixed the method that the resistive partitioned detector of gadolinium is surveyed thermal neutron, it is characterized in that, described method is:
Respectively described the first detector is loaded different operating voltage with described the second detector;
When outside incident particle and described bilayer are mixed the resistive detector of gadolinium and are reacted, whether judgement is positioned at the signal amplitude spectrum that the matrix unit at any opposite position place of described the first detector and described the second detector exports consistent, be that the described outside incident particle in described this matrix unit position is gamma-ray photon or other particle, otherwise be thermal neutron at the described outside incident particle of described this matrix unit position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310009607.1A CN103091702B (en) | 2009-08-28 | 2009-08-28 | Double-layer gadolinium-doped impedance board detector and neutron detecting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310009607.1A CN103091702B (en) | 2009-08-28 | 2009-08-28 | Double-layer gadolinium-doped impedance board detector and neutron detecting method thereof |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910169723 Division CN101995581B (en) | 2009-08-28 | 2009-08-28 | Single-layer gadolinium-doped resistive plate detector and method for detecting neutron thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103091702A true CN103091702A (en) | 2013-05-08 |
| CN103091702B CN103091702B (en) | 2015-04-01 |
Family
ID=48204503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310009607.1A Active CN103091702B (en) | 2009-08-28 | 2009-08-28 | Double-layer gadolinium-doped impedance board detector and neutron detecting method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103091702B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105929441A (en) * | 2016-06-22 | 2016-09-07 | 章先鸣 | Microchannel plate type fast neutron position gas detector and detection method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1531344A1 (en) * | 2003-11-13 | 2005-05-18 | Paul Scherrer Institut | A pixel detector for neutron radiography and process for detecting incident neutrones |
| CN101339251A (en) * | 2008-06-13 | 2009-01-07 | 清华大学 | Sensitive radiation detecting device for ray particle two-dimensional location |
| CN201229789Y (en) * | 2008-06-18 | 2009-04-29 | 苏民发 | Resistant board |
| CN101329404A (en) * | 2008-07-11 | 2008-12-24 | 清华大学 | Neutron gamma-ray detecting device |
-
2009
- 2009-08-28 CN CN201310009607.1A patent/CN103091702B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105929441A (en) * | 2016-06-22 | 2016-09-07 | 章先鸣 | Microchannel plate type fast neutron position gas detector and detection method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103091702B (en) | 2015-04-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105738940B (en) | A kind of detector for beam profile uniformity on-line measurement | |
| JP5080489B2 (en) | Gas metering | |
| CN101995581B (en) | Single-layer gadolinium-doped resistive plate detector and method for detecting neutron thereof | |
| Pappalardo et al. | Characterization of the silicon+ 6LiF thermal neutron detection technique | |
| Shao et al. | Beam test results of two kinds of multi-gap resistive plate chambers | |
| Drake et al. | Resistive Plate Chambers for hadron calorimetry: Tests with analog readout | |
| CN102176047B (en) | Neutron personal dosimeter with energy compensation | |
| CN103091702B (en) | Double-layer gadolinium-doped impedance board detector and neutron detecting method thereof | |
| Kong | Nanomaterials for Supercapacitors | |
| Pace et al. | Energetic ion loss detector on the Alcator C-Mod tokamak | |
| CN106950592A (en) | A kind of neutron detector that boron membrane and multiwire proportional chamber are applied based on multilayer | |
| Anghel et al. | Cosmic ray muon tomography system using drift chambers for the detection of special nuclear materials | |
| CN102830383A (en) | Atmospheric electric field calibration system with high precision and wide range | |
| CN106707174A (en) | Method and system for detecting polymer lithium battery pack consistency | |
| RU109300U1 (en) | DEVICE FOR GAMMA-NEUTRON RADIATION REGISTRATION | |
| QI et al. | Investigation of Gas attachment with GEM-TPC detector | |
| US8481957B2 (en) | Ionizing radiation detector | |
| CN203149125U (en) | Radiation particle detector and radiation particle detecting system applied with the same | |
| CN202362386U (en) | High power carbon electrode resistivity measuring device | |
| Lyu et al. | Study on cosmic test and QC method of high-rate MRPC for CBM-TOF | |
| Aghababaie et al. | Effective actions, boundaries, and precision calculations of Casimir energies | |
| CN202533586U (en) | Signal reading strip used in radiation detector | |
| Dai et al. | Low resistance bakelite RPC study for high rate working capability | |
| JP2002014171A (en) | HIGH-PERFORMANCE He-3 COUNTER FOR NEUTRON | |
| CN107064993A (en) | A kind of method that neutron detection is carried out based on the time difference |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |