CN101995581A - Gadolinium-doped resistive plate and detector formed thereby - Google Patents
Gadolinium-doped resistive plate and detector formed thereby Download PDFInfo
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- CN101995581A CN101995581A CN2009101697233A CN200910169723A CN101995581A CN 101995581 A CN101995581 A CN 101995581A CN 2009101697233 A CN2009101697233 A CN 2009101697233A CN 200910169723 A CN200910169723 A CN 200910169723A CN 101995581 A CN101995581 A CN 101995581A
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Abstract
The invention discloses a gadolinium-doped resistive plate and a detector formed thereby. The detector formed by the gadolinium-doped resistive plate is loaded with different working voltages in different load voltage structural modes, and thermal neutron sources are screened from multiparticles according to the characteristics of unstable amplitude spectrums of induction signals after thermal neutrons react with the detector under different electric work high voltages. The gadolinium-doped resistive plate has low cost, a large-area detector is easy to produce in a large scale, and the produced detector has high thermal neutron resolution capability.
Description
Technical field
The present invention relates to gas detector, relate in particular to a kind of detector of mixing resistive plate of gadolinium and formation thereof.
Background technology
Resistive partitioned detector is a kind of gas detector that is used to survey 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, inner certain the regional working gas of the resistive partitioned detector of ionization is produced 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, two resistive plate 1 parallel placements, apply negative electrode and the anodes of layer of even graphite electrode 2 at the outside surface of described two blocks of resistive plates 1 respectively as power supply, the skin of graphite electrode 2 insulating material 3 by one deck with link to each other with printed circuit board signal electrode 4.Behind interior certain the regional working gas of the resistive partitioned detector of outside incident particle this structure of ionization, ionizing particle and then generation snowslide are amplified and the time amplifies, after producing avalanche signal or time signal, can cause the variation of electric field simultaneously on the anodic-cathodic respective regions surface of this resistive plate, these induced charge small parts are sponged by resistive plate medium, all the other major parts are at this insulating material 3 of process, to on printed circuit board (PCB) reading electrode 4, induce corresponding signal, hit characteristics such as position, induced charge and time response with what this knew incident particle.
Different with high energy charged particles and high-energy photon, it is electromagnetic interaction, ionization or the exciting media atom of media that neutron can not take place with the coulomb interaction with the detector medium; Also not can with medium generation photoelectric effect, Compton scattering etc., so neutron is difficult for by direct detection, generally be that the nuclear scattering that takes place 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 costs an arm and a leg, and is unfavorable for that monitor large-area has the ambient field of neutron irradiation.
Summary of the invention
Fundamental purpose of the present invention be to provide a kind of cost low mix the resistive plate of gadolinium, technical matters to be solved is to make it can be used for surveying thermal neutron.
For this reason, a kind of resistive plate of gadolinium of mixing provided by the present invention comprises:
Mix gadolinium coating facial tissue, facial tissue and at the described inner core material of mixing between gadolinium coating facial tissue and the facial tissue;
The wherein said gadolinium coating facial tissue of mixing is printed with and mixes the gadolinium coating;
Wherein said facial tissue is the special-purpose titanium white facing paper of decorative panel that has flooded melamine resin;
Wherein said inner core material is to have flooded the electric insulation impregnated paper behind the phenolics.
The present invention also provides a kind of above-mentioned method for making of mixing the resistive plate of gadolinium of making, and mixes the resistive plate of gadolinium with what allow to produce said structure, said method comprising the steps of:
Mix gadolinium coat side paper and make step, comprise: with the gadolinium oxide powder in glue, by the intaglio printing technology it is transferred on the facial tissue, after the drying described facial tissue is carried out the impregnation of melamine glue, make its surface apply one deck melamine glue again, through super-dry and semi-solid preparation, become and mix gadolinium coating facial tissue;
The inner core material making step comprises: with electric insulation impregnated paper impregnated phenolic resin, dry then and semi-solid preparation becomes inner core material;
The facial tissue making step comprises: with the special-purpose titanium white facing paper of decorative panel impregnated melamine resin, dry then and curing becomes facial tissue;
One-body molded step comprises: described gadolinium coating facial tissue, inner core material and the facial tissue mixed stacked successively, adopt plating polishing stainless steel template to suppress then under certain High Temperature High Pressure, mix the resistive plate of gadolinium thereby make.
Another object of the present invention provides and a kind ofly is easy to the large tracts of land of large-scale production, mixes the resistive partitioned detector of gadolinium cheaply, and to allow to telling thermal neutron from the multiparticle source, described detector comprises:
Two in opposite directions and right resistive plate, two graphite electrodes that the one side links to each other with described two blocks of resistive plates outside respectively, pass through two reading electrodes that a dielectric film links to each other with described two graphite electrode opposite sides respectively, described wherein one or whole two blocks of resistive plates are for mixing the resistive plate of gadolinium, and described detector loads operating voltage by two graphite electrodes.
The present invention also provides a kind of individual layer that carries out position resolution to mix the resistive partitioned detector of gadolinium, comprise: two in opposite directions and right resistive plate, two graphite electrodes that the one side links to each other with described two blocks of resistive plates outside respectively, two reading electrodes that link to each other with described two graphite electrode opposite sides by a dielectric film respectively, described wherein one or whole two blocks of resistive plates are for mixing the resistive plate of gadolinium; Described detector loads operating voltage by two graphite electrodes; The matrix electrodes of the graphite electrode of wherein said noble potential for constituting by adjacent category-A graphite electrode of a plurality of intersections and category-B graphite electrode matrix unit, described category-A graphite electrode also loads different high-potential voltages respectively with the category-B graphite electrode; The reading electrode that links to each other with described noble potential graphite electrode is the matrix electrodes for being linked to each other and constituted by a plurality of category-A reading electrodes and a plurality of category-B reading electrode crossing also; Described a plurality of category-A reading electrode and a plurality of category-B reading electrode are corresponding one by one with the position of a plurality of category-A graphite electrodes and category-B graphite electrode respectively.
Preferably, the described voltage that is carried on category-A graphite electrode and the category-B graphite electrode has the voltage pressure reduction of 500-1000V.
The invention provides a kind of bilayer and mix the resistive partitioned detector of gadolinium, comprising:
Two are adopted described first detector and second detector of mixing the resistive partitioned detector structure of gadolinium;
The public reading electrode of wherein said first detector and second detector;
Described first detector and the second detector operating voltage have certain voltage difference.
Preferably, first detector adjacent with described public reading electrode and the graphite electrode of second detector load same voltage, and another graphite electrode of described first detector and second detector loads different voltage.
Preferably, described voltage difference is 500-1000V.
Preferably, another reading electrode of described first detector and second detector is a matrix electrodes.
The invention provides a kind of employing and mix the method that the resistive partitioned detector of gadolinium is surveyed thermal neutron, described method is:
Load the different operating high pressure to mixing the resistive detector of gadolinium;
When outside incident particle and described when mixing the resistive detector of gadolinium and reacting, whether the amplitude spectrum of signal is sensed in judgement on described detector readings electrode under the described different operating high pressure inconsistent, be that then incident particle is a neutron, otherwise described external particles is gamma-ray photon or other particle.
The present invention also provides a kind of individual layer that adopts to mix the method that the resistive partitioned detector of gadolinium is surveyed thermal neutron, and described method is:
The category-A graphite electrode of individual layer being mixed the resistive partitioned detector of gadolinium loads different voltage respectively with a plurality of category-B graphite electrodes;
Whether inconsistent, be that then described external particles is a thermal neutron, otherwise described outside incident particle is gamma-ray photon or other particle if differentiating the category-A reading electrode of any two adjacent positions and amplitude spectrum that category-B reading electrode induces signal.
The present invention also provides a kind of bilayer that adopts to mix the method that the resistive partitioned detector of gadolinium is surveyed thermal neutron, and described method is:
Mix the resistive partitioned detector of gadolinium to two respectively and load different operating voltage;
When outside incident particle and described when mixing the resistive detector of gadolinium and reacting, whether the amplitude spectrum of judging described two another reading signals that electrode induces of mixing the resistive partitioned detector of gadolinium is inconsistent, be that then described outside incident particle is a thermal neutron, otherwise described outside incident particle is gamma-ray photon or other particle.
The method of described judgement also comprises:
Mix another reading electrode of the resistive partitioned detector of gadolinium with described two and be divided into the matrix electrodes that constitutes by a plurality of matrix units;
When outside incident particle and described when mixing the resistive detector of gadolinium and reacting, judge that two are mixed the resistive plate of gadolinium whether survey the signal amplitude spectrum of any opposite position place matrix unit output inconsistent, the described outside incident particle that is then described this matrix unit position is a thermal neutron, otherwise described outside incident particle is gamma-ray photon or other particle.
As shown from the above technical solution, embodiments of the invention are by adopting a kind of detector that the resistive plate of gadolinium is made into of mixing, thereby can tell thermal neutron from the multiparticle source, have following beneficial effect:
1, described to mix the resistive sheet material material of gadolinium be hydrocarbon substance, is good moderation of neutrons body, and insensitive to the γ photon, can screen out thermal neutron well;
2, described employing is mixed the resistive plate of gadolinium to constitute the geometry of detector simple, range of size is very wide, can make the very big 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 monitoring to the environmental neutron background.
3, can be by single detector oneself contrast signal, realization to whether the thermal neutron composition is arranged in the incident line is screened, and also can will differentiate the particular location of thermal source further by transmitting electrode (graphite electrode) and reading electrode are divided into matrix electrodes.
With reference to the accompanying drawing description of a preferred embodiment, above-mentioned and other purpose of the present invention, feature and advantage will be more obvious by following.
Description of drawings
Fig. 1 is the structural representation of resistive partitioned detector in the prior art;
The signal amplitude spectrum that Fig. 2 mixes gadolinium resistive plate detected neutron source and gamma-ray photon source for the present invention adopts.
Fig. 3 is that the present invention adopts the signal amplitude of mixing gadolinium resistive plate detected neutron source and gamma-ray photon source to compose the change curve of peak position central value with 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 synoptic 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 synoptic 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 synoptic diagram that bilayer shown in Figure 8 is mixed a kind of matrix structure reading electrode of the resistive partitioned detector of gadolinium.
Embodiment
To describe specific embodiments of the invention in detail below.Should be noted that the embodiments described herein only is used to illustrate, be not limited to the present invention.
Before describing the present invention in detail, be example with identification neutron source and gamma-ray photon source here, the resistive partitioned detector of gadolinium screens out thermal neutron from different particles the principle of mixing of the present invention once is described earlier.
Load different operating voltage in resistive partitioned detector perform region, can in resistive partitioned detector subrange, form different electric fields, and the gadolinium atom amplifies the degree varies sample with 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 difference that it detects, 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 then 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, while detected neutron source and gamma-ray photon radioactive source, relatively the difference of its amplitude spectrum peak position 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, this detector perform region is loaded different operating voltage, make the reaction of thermal neutron and gadolinium, according to the difference of sensing the signal amplitude spectrum from this detector readings electrode, from outside incident particle, tell thermal neutron.
Before the resistive partitioned detector of explanation the present invention,, the manufacture craft of mixing the resistive plate of gadolinium is once described earlier in conjunction with the structure of mixing the resistive plate of gadolinium shown in Figure 4.
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 the 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 in glue, is transferred to it on facial tissue by the intaglio printing technology, finished the printing of mixing the gadolinium coating after the drying; Printed the impregnation that the facial tissue of mixing the gadolinium coating carries out the melamine glue with above-mentioned, made its surface apply one deck melamine glue again, dry and semi-solid preparation becomes and mixes 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 influence the detection efficiency of absorption layer to 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 impregnated phenolic resin, carries out drying and semi-solid preparation through drying oven, becomes inner core material 42.
After above-mentioned each layer making finishes, after will mixing gadolinium coating facial tissue 41, inner core material 42, facial tissue 43 and stack successively according to method shown in Figure 4 then, be pressed into composite laminate with electroplating 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 the surface smoothness of resistive plate thus.
What must illustrate here is that the dry solidification situation of mixing gadolinium coating facial tissue 41, inner core material 42, facial tissue 43 will influence resistive plate body resistivity, regulates its drying time in drying oven, can finish the control to resistive sheet material 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 sheet material 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 the 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 ground connection copper film 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 satisfy makes detector can be operated in condition under the time pattern, difference according to the resistive sheet material material body resistivity that is adopted, 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 the said structure can adopt mixes the resistive plate of gadolinium, so that improve the performance of detector more.
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 take place wink to send out nuclear reaction with the gadolinium atom mixed in the gadolinium coating in this perform region, produces secondary particles such as Auger electron, gamma-rays, X ray, internal conversion electron.It is right that these secondarys produce negative ions at the inner meeting of this detector ionization working gas equally, and under the highfield effect, and then the generation snowslide is amplified or the time amplifies, formation avalanche signal or time signal.A neutron is captured the effect that nuclear reaction takes place to send out in wink by gadolinium, is 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, take place wink to send out nuclear reaction, produce a plurality of secondarys, because the multiparticle effect, its signal amplitude of on the detector readings electrode, responding to will be with the difference of working voltage difference to some extent.By changing the operating voltage that graphite electrode loaded, the signal 58 that the observed reading electrode induces, if increase along with operating voltage, the amplitude spectrum of induced signal is more stable, then this external particles source is not a thermal neutron, if instead along with the increase of operating voltage, the amplitude spectrum of read output signal also increases gradually, and then this external particles source is a thermal source.
Above-mentioned employing detector is differentiated in the method for thermal neutron, need constantly to change detector operation voltage, and detector operation voltage loads by two graphite electrodes, in order more clearly to tell the position of thermal neutron stream, 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, be implemented in the different operating voltage of loading in the 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 high more, and its quantity is many 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 difference that it loaded, 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 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; Category-B reading electrode 71 corresponding category-B graphite electrodes 62 load high pressure and form 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, the category-A reading electrode by adjacent position relatively and the signal amplitude of category-B reading electrode output compose whether differentiate incident particle be thermal neutron.Certainly can be combined as one here with 4 matrix units of adjacent position and survey junior unit, a in, b, c, d matrix unit are combined as a probe unit as shown in Figure 7.The electric field of a, d matrix unit correspondence is 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 is 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 shown in 8, two detectors are placed side by side, wherein Zuo Ce detector is first detector, the detector on right side is second detector, first detector and second detector all adopt structure shown in Figure 5, the public reading electrode 87 of first detector and second detector wherein, in general, public reading electrode is a ground-electrode, can adopt the monoblock copper sheet with the identical size of resistive plate.Two-layer detector is inequality by the operating voltage that graphite electrode loaded, here in the present invention, the voltage that not necessarily requires two-layer each graphite electrode of detector to be loaded is all inequality, can have different load modes according to concrete high-pressure insert, such as, can adopt same high-pressure insert that the graphite electrode of two-layer detector electronegative potential is loaded same low-potential voltage, 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 the two-layer detector can be all for mixing the resistive plate of gadolinium, also can be 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 thermal neutron stream, another reading electrode that is positioned at both sides of first detector and second detector adopts block matrix electrodes, as shown in Figure 9, each matrix unit 91 is all 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 then this matrix unit position is a thermal source, otherwise, quite different.
Though described the present invention with reference to several exemplary embodiments, should be appreciated that used term 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, the foregoing description is not limited to any aforesaid details, and should be in the spirit and scope that claim limited of enclosing 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 (13)
1. mix the resistive plate of gadolinium for one kind, it is characterized in that, described resistive plate comprises:
Mix gadolinium coating facial tissue, facial tissue and at the described inner core material of mixing between gadolinium coating facial tissue and the facial tissue; The wherein said gadolinium coating facial tissue of mixing is printed with and mixes the gadolinium coating;
Wherein said facial tissue is the special-purpose titanium white facing paper of decorative panel that has flooded melamine resin;
Wherein said inner core material is to have flooded the electric insulation impregnated paper behind the phenolics.
2. a method for making of mixing the resistive plate of gadolinium is characterized in that, described method is:
Mix gadolinium coat side paper and make step, comprise: with the gadolinium oxide powder in glue, by the intaglio printing technology it is transferred on the facial tissue, after the drying described facial tissue is carried out the impregnation of melamine glue, make its surface apply one deck melamine glue again, through super-dry and semi-solid preparation, become and mix gadolinium coating facial tissue;
The inner core material making step comprises: with electric insulation impregnated paper impregnated phenolic resin, dry then and semi-solid preparation becomes inner core material;
The facial tissue making step comprises: with the special-purpose titanium white facing paper of decorative panel impregnated melamine resin, dry then and curing becomes facial tissue;
One-body molded step comprises: described gadolinium coating facial tissue, inner core material and the facial tissue mixed stacked successively, adopt plating polishing stainless steel template to suppress then under certain High Temperature High Pressure, mix the resistive plate of gadolinium thereby make.
3. mix the resistive partitioned detector of gadolinium for one kind, comprise: two in opposite directions and right resistive plate, two graphite electrodes that the one side links to each other with described two blocks of resistive plates outside respectively, pass through two reading electrodes that a dielectric film links to each other with described two graphite electrode opposite sides respectively, it is characterized in that, described wherein one or whole two blocks of resistive plates are for mixing the resistive plate of gadolinium, and described detector loads operating voltage by two graphite electrodes.
4. an individual layer is mixed the resistive partitioned detector of gadolinium, comprise: two are in opposite directions and right resistive plate, the one side respectively with described two two graphite electrodes that the resistive plates outside links to each other, pass through two reading electrodes that a dielectric film links to each other with described two graphite electrode opposite sides respectively, it is characterized in that
Described wherein one or whole two blocks of resistive plates are for mixing the resistive plate of gadolinium;
Described detector loads operating voltage by two graphite electrodes;
The matrix electrodes of the graphite electrode of wherein said noble potential for constituting by adjacent category-A graphite electrode of a plurality of intersections and category-B graphite electrode matrix unit, described category-A graphite electrode also loads different high-potential voltages respectively with the category-B graphite electrode;
The reading electrode that links to each other with described noble potential graphite electrode is the matrix electrodes for being linked to each other and constituted by a plurality of category-A reading electrodes and a plurality of category-B reading electrode crossing also;
Described a plurality of category-A reading electrode and a plurality of category-B reading electrode are corresponding one by one with the position of a plurality of category-A graphite electrodes and category-B graphite electrode respectively.
5. detector according to claim 4 is characterized in that, the described voltage that is carried on category-A graphite electrode and the category-B graphite electrode has the voltage pressure reduction of 500-1000V.
6. a bilayer is mixed the resistive partitioned detector of gadolinium, it is characterized in that, comprising:
Described first detector of the claim 3 of two parallel connections and second detector;
The public reading electrode of wherein said first detector and second detector;
Described first detector and the second detector operating voltage have certain voltage difference.
7. detector according to claim 6, it is characterized in that, first detector adjacent with described public reading electrode and the graphite electrode of second detector load same voltage, and another graphite electrode of described first detector and second detector loads different voltage.
8. according to claim 6 or 7 described detectors, it is characterized in that described voltage difference is 500-1000V.
9. according to claim 6 or 7 described detectors, it is characterized in that another reading electrode of described first detector and second detector is a matrix electrodes.
10. the method that the resistive partitioned detector of gadolinium is surveyed thermal neutron is mixed in an employing, it is characterized in that described method is:
Load the different operating high pressure to mixing the resistive detector of gadolinium;
When outside incident particle and described when mixing the resistive detector of gadolinium and reacting, whether the amplitude spectrum of signal is sensed in judgement on described detector readings electrode under the described different operating high pressure inconsistent, be that then incident particle is a neutron, otherwise described external particles is gamma-ray photon or other particle.
11. one kind is adopted individual layer to mix the method that the resistive partitioned detector of gadolinium is surveyed thermal neutron, it is characterized in that described method is:
The category-A graphite electrode of individual layer being mixed the resistive partitioned detector of gadolinium loads different voltage respectively with a plurality of category-B graphite electrodes;
Whether inconsistent, be that then described external particles is a thermal neutron, otherwise described outside incident particle is gamma-ray photon or other particle if differentiating the category-A reading electrode of any two adjacent positions and amplitude spectrum that category-B reading electrode induces signal.
12. one kind is adopted bilayer to mix the method that the resistive partitioned detector of gadolinium is surveyed thermal neutron, it is characterized in that described method is:
Mix the resistive partitioned detector of gadolinium to two respectively and load different operating voltage;
When outside incident particle and described when mixing the resistive detector of gadolinium and reacting, whether the amplitude spectrum of judging described two another reading signals that electrode induces of mixing the resistive partitioned detector of gadolinium is inconsistent, be that then described outside incident particle is a thermal neutron, otherwise described outside incident particle is gamma-ray photon or other particle.
13. method according to claim 12 is characterized in that, the method for described judgement also comprises:
Mix another reading electrode of the resistive partitioned detector of gadolinium with described two and be divided into the matrix electrodes that constitutes by a plurality of matrix units;
When outside incident particle and described when mixing the resistive detector of gadolinium and reacting, judge that two are mixed the resistive plate of gadolinium whether survey the signal amplitude spectrum of any opposite position place matrix unit output inconsistent, the described outside incident particle that is then described this matrix unit position is a thermal neutron, otherwise described outside incident particle is gamma-ray photon or other particle.
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| CN 200910169723 CN101995581B (en) | 2009-08-28 | 2009-08-28 | Single-layer gadolinium-doped resistive plate detector and method for detecting neutron thereof |
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| CN 200910169723 CN101995581B (en) | 2009-08-28 | 2009-08-28 | Single-layer gadolinium-doped resistive plate detector and method for detecting neutron thereof |
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| CN201310009607.1A Division CN103091702B (en) | 2009-08-28 | 2009-08-28 | Double-layer gadolinium-doped impedance board detector and neutron detecting method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103507372A (en) * | 2012-06-27 | 2014-01-15 | 中国科学院高能物理研究所 | Laminated resistive plate and manufacturing 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 |
| CN107884809A (en) * | 2017-11-10 | 2018-04-06 | 中国科学院高能物理研究所 | Neutron detection negative electrode, neutron detector and neutron detection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101339251A (en) * | 2008-06-13 | 2009-01-07 | 清华大学 | Sensitive radiation detecting device for ray particle two-dimensional location |
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| EP1531344A1 (en) * | 2003-11-13 | 2005-05-18 | Paul Scherrer Institut | A pixel detector for neutron radiography and process for detecting incident neutrones |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101339251A (en) * | 2008-06-13 | 2009-01-07 | 清华大学 | Sensitive radiation detecting device for ray particle two-dimensional location |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103507372A (en) * | 2012-06-27 | 2014-01-15 | 中国科学院高能物理研究所 | Laminated resistive plate and manufacturing 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 |
| CN104111471B (en) * | 2013-04-18 | 2017-03-08 | 中国科学院高能物理研究所 | Neutron detector and neutron detection method |
| CN107884809A (en) * | 2017-11-10 | 2018-04-06 | 中国科学院高能物理研究所 | Neutron detection negative electrode, neutron detector and neutron detection method |
| CN107884809B (en) * | 2017-11-10 | 2020-09-15 | 中国科学院高能物理研究所 | Neutron detector and neutron detection method |
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| CN101995581B (en) | 2013-01-23 |
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