CN103376461A - Neutron position detector, detection system and detection method - Google Patents
Neutron position detector, detection system and detection method Download PDFInfo
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- CN103376461A CN103376461A CN201210117203XA CN201210117203A CN103376461A CN 103376461 A CN103376461 A CN 103376461A CN 201210117203X A CN201210117203X A CN 201210117203XA CN 201210117203 A CN201210117203 A CN 201210117203A CN 103376461 A CN103376461 A CN 103376461A
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Abstract
The invention relates to a neutron position detector, a detection system and a detection method. The neutron position detector comprises a photovoltaic conversion device, two stacked neutron sensitive scintillators and a wave moving optical fiber array, wherein the two neutron sensitive scintillators are stacked on the upper side and the lower side of the wave moving optical fiber array respectively. The neutron sensitive scintillators are used for receiving neutrons and generating photons; the wave moving optical fiber array is used for receiving the photons generated by the neutron sensitive scintillators and transmitting the photons to the photovoltaic conversion device; the photovoltaic conversion device converts the photons transmitted by the wave moving optical fiber array into an electric signal and outputs the electric signal. The neutron position detector, the detection system and the detection method have the advantages of being high in neutron detection efficiency, high in locating accuracy, high in n/gamma rejection ratio, capable of being manufactured with a large area, and the like. Compared with other prior neutron position detectors, the neutron position detector is low in manufacturing cost.
Description
Technical field
The application relates to a kind of neutron position sensor, detection system and detection method.
Background technology
Neutron and X ray all are human effective probes of exploring material microstructure.After finding neutron in 1932, the application of neutron and neutron scattering technology makes people make rapid progress to the understanding of material microstructure from English physicist Chadwick (J.Chadwick).Different from X ray, neutron is not charged, penetrating electrons layer easily, and with atomic nucleus generation nuclear reaction, the neutron energy of its mass attenuation coefficient and incident is relevant with the atomic nucleus cross section of material.Therefore the son that can be right is the desirable probe of studying at present the structure of matter and kinetic property.The neutron scattering technology is utilized low energy neutron (E
n＜1eV) wavelength and atomic distance is close, the energy of thermal motion of energy and atom, molecule is about the same simultaneously, study the structure of matter and motion state. the neutron after the scattering need to receive with the high neutron position sensor of position-sensitivity, to obtain the shooting angle of scattered neutron, for the amalyzing substances structure provides effective information.This requires the neutron position sensor to have following some performance: high count rate, High detect efficiency, large solid angle, high position precision and high n/ γ rejection ratio.
Because neutron is not charged, general using nuclear reaction method is surveyed.Comparatively commonly used has
3He (n, p)
3T,
10Be (n, α)
7Li and
6Li (n, α)
3T reaction, the reaction cross-section of they and neutron is all larger.The neutron position sensor that wherein grows up based on 3He gas is the most frequently used at present, and the ripe neutron detection means of technology, such as the hyperbar 3He position sensing proportional counter of U.S. GE Energy company production.Its structure is seen Fig. 1, mainly drawing joint 11 by anodic wire 12, seal air pipe 13 and signal consists of, fill 3He gas and other quencher gases of certain air pressure in the seal air pipe, the secondary charged particle that incident neutron and 3He nuclear reaction produce is off-energy and generation ionization in quencher gas, the electron-positron pair that ionization produces induces signal at anodic wire, this signal is input to rear end electronics through the anodic wire two ends, by analyzing the electric signal at two ends, can obtain the positional information of incident neutron.
Because the anti-terrorism situation needs and the scarcity of whole world 3He, made the 3He big bulge in price in recent years, 3He gas price amount of increase surpassed 20 times in nearly 3 years, and is also just very expensive based on the detector of 3He.Take an atmospheric pressure 3He position sensing proportional counter of 1 inch as example, present quotation is 5-10 ten thousand Renminbi, such one 1m
2The detector array cost is more than 3,000,000. and novel neutron position sensor being is all is being researched and developed to satisfy various science needs in present many laboratories, such as semiconductor neutron position sensor, being coated with boron GEM neutron position sensor. these detectors all are in development, the subject matter that faces is that neutron detection efficient is low, n/ γ rejection ratio is not high, be subject to simultaneously the problem of technological layer, its critical component involves great expense equally.
Summary of the invention
Provide hereinafter about brief overview of the present invention, in order to basic comprehension about some aspect of the present invention is provided.Should be appreciated that this general introduction is not about exhaustive general introduction of the present invention.It is not that intention is determined key of the present invention or pith, neither be intended to limit scope of the present invention.Its purpose only is that the form of simplifying provides some concept, with this as the in greater detail preorder of discussing after a while.
According to an aspect of the present invention,
A kind of neutron position sensor comprises electrooptical device, and stacked two neutron-sensitive scintillators and ripple shifting fiber array;
Wherein:
Described two neutron-sensitive scintillators are stacked in respectively the upper and lower both sides of described ripple shifting fiber array;
Described neutron-sensitive scintillator is used for receiving neutron and producing photon;
The photon that the described neutron-sensitive scintillator of described ripple shifting fiber array received produces, and with described photon transmission to electrooptical device;
Described electrooptical device is converted to electric signal and output with the photon of described ripple shifting fiber array transmission.
Further, in the neutron position sensor, described ripple shifting fiber array comprises first wave shifting fiber layer and Second Wave shifting fiber layer, and the described residing plane of first wave shifting fiber layer and the residing plane of described Second Wave shifting fiber layer are parallel to each other;
Described first wave shifting fiber layer and Second Wave shifting fiber layer all comprise a plurality of optical fiber groups of parallel arrangement, and each described optical fiber group includes one or more optical fiber that is arranged in parallel;
A plurality of optical fiber groups in the described first wave shifting fiber layer are mutually vertical with a plurality of optical fiber groups of described Second Wave shifting fiber layer.
Further, in the neutron position sensor, described optical fiber comprises the mutually different covering of density and sandwich layer;
Described covering is set in the outside surface of described sandwich layer;
Described sandwich layer comprises that ripple moves material.
Further, in the neutron position sensor, described neutron-sensitive scintillator comprises neutron-sensitive material and ionising radiation sensitive material;
Wherein, described neutron-sensitive material is used for neutron generation nuclear reaction and produces charged particle;
Described ionising radiation sensitive material is subjected to described charged particle ionization, excites and de excitation, and produces photon when de excitation.
Further, in the neutron position sensor, described electrooptical device comprises the first electrooptical device and the second electrooptical device;
Wherein:
Described the first electrooptical device is connected with the two ends of a plurality of optical fiber groups of first wave shifting fiber layer;
Described the second electrooptical device is connected with the two ends of a plurality of optical fiber groups of Second Wave shifting fiber layer.
Further, in the neutron position sensor, described ripple shifting fiber array by light-guide material or Air Coupling to described electrooptical device.
Further, in the neutron position sensor, described electrooptical device comprises one or more of photomultiplier, optical semiconductor detector and charge coupled cell.
Further, in the neutron position sensor, each the optical fiber group in described first wave shifting fiber layer and the Second Wave shifting fiber layer is coupled with single or multiple electrooptical device respectively.
Further, in the neutron position sensor, described neutron-sensitive material comprises
6Li,
10B,
155,157One or more of Gd.
According to a further aspect in the invention, a kind of neutron location detection system comprises data-acquisition system and neutron position sensor;
Wherein:
Described data-acquisition system is connected with described electrooptical device, is used for receiving the electric signal of described electrooptical device output, and calculates the position of described neutron on described neutron-sensitive scintillator.
According to a third aspect of the invention we, a kind of neutron location detection methods comprises:
Step 1: the neutron-sensitive scintillator receives neutron and produces photon;
Step 2: the photon that the described neutron-sensitive scintillator of ripple shifting fiber array received produces, and with described photon transmission to electrooptical device;
Step 3: electrooptical device is converted to electric signal and output with the photon of described ripple shifting fiber array transmission.
Further, in the neutron location detection methods, described step 1 comprises: the neutron-sensitive material in the described neutron-sensitive scintillator and neutron generation nuclear reaction also produce charged particle;
Ionising radiation sensitive material in the described neutron-sensitive scintillator is subjected to described charged particle ionization, excites and de excitation, and produces photon when de excitation.
Further, in the neutron location detection methods, described step 2 comprises:
The horizontal ordinate of the first wave shifting fiber Layer Detection neutron incoming position of described ripple shifting fiber array;
The ordinate of the Second Wave shifting fiber Layer Detection neutron incoming position of described ripple shifting fiber array;
Wherein, the described residing plane of first wave shifting fiber layer and the residing plane of described Second Wave shifting fiber layer are parallel to each other; Described first wave shifting fiber layer and Second Wave shifting fiber layer all comprise a plurality of optical fiber groups of parallel arrangement, and each described optical fiber group includes one or more optical fiber that is arranged in parallel; A plurality of optical fiber groups in the described first wave shifting fiber layer are mutually vertical with a plurality of optical fiber groups of described Second Wave shifting fiber layer;
The coordinate of described horizontal ordinate and the reference of described ordinate institute is: for take a preset as initial point, take a ray of described a plurality of optical fiber groups that is parallel to described first wave shifting fiber layer as transverse axis, be parallel to the ray of described a plurality of optical fiber groups of described Second Wave shifting fiber layer as coordinate system that the longitudinal axis was formed take one.
Further, the neutron location detection methods also comprises:
Step 4: data-acquisition system receives the electric signal of electrooptical device output, and passing threshold discrimination method or electric charge gravity model appoach, obtains the centre of gravity place that electric signal distributes.
Neutron position sensor of the present invention, detection system and detection method, but neutron detection efficient is high, bearing accuracy is high, n/ γ rejection ratio is high and the advantage such as large-area manufacturing, simultaneously and present other neutron position sensors compare, cheap.
Description of drawings
With reference to below in conjunction with the explanation of accompanying drawing to the embodiment of the invention, can understand more easily above and other purpose of the present invention, characteristics and advantage.Parts in the accompanying drawing are just in order to illustrate principle of the present invention.In the accompanying drawings, same or similar technical characterictic or parts will adopt identical or similar Reference numeral to represent.
Fig. 1 is the structural drawing of the hyperbar 3He position sensing proportional counter of prior art;
Fig. 2 is the structural drawing of a kind of embodiment of neutron position sensor of the present invention;
Fig. 3 is the sectional view of a kind of embodiment of ripple shifting fiber;
Fig. 4 is the process flow diagram of a kind of embodiment of neutron location detection methods of the present invention.
Embodiment
Embodiments of the invention are described with reference to the accompanying drawings.The element of describing in an accompanying drawing of the present invention or a kind of embodiment and feature can combine with element and the feature shown in one or more other accompanying drawing or the embodiment.Should be noted that for purpose clearly, omitted expression and the description of parts that have nothing to do with the present invention, known to persons of ordinary skill in the art and processing in accompanying drawing and the explanation.
Shown in accompanying drawing 2, be the structural drawing of a kind of embodiment of neutron position sensor of the present invention.In this embodiment, the neutron position sensor comprises electrooptical device 23, and stacked two neutron-sensitive scintillators 22 and ripple shifting fiber array 21.
Two neutron-sensitive scintillators 22 are separately positioned on ripple shifting fiber array, and about in the of 21 both sides.Because in the neutron detection efficient and neutron-sensitive scintillator of neutron position sensor, the doping of neutron-sensitive material is relevant.For improving neutron detection efficient, can improve the material doped amount of neutron-sensitive or thickening neutron-sensitive scintillator.Yet, if thickening neutron-sensitive scintillator has the risk that increases the passage of scintillation light self-absorption, reduces the emergent light subnumber.In the upper and lower both sides of ripple shifting fiber array 21 a neutron-sensitive scintillator 22 is set respectively, the probability of incident neutron and the nuclear reaction of neutron-sensitive material production is increased.Because the thickness of single neutron-sensitive scintillator does not increase, its surperficial emergent light subnumber does not reduce simultaneously.
Neutron-sensitive scintillator 22 is used for receiving neutron and producing photon.As a kind of embodiment, neutron-sensitive scintillator 22 can comprise neutron-sensitive material and ionising radiation sensitive material.The neutron-sensitive material is used for neutron generation nuclear reaction and produces charged particle.The neutron-sensitive material for example can comprise
6Li,
10B,
155,157One or more of Gd.For example, can adopt
6Li (n, t)
4He,
10B (n, α)
7Li,
155,157Gd (n, γ)
156,158The nuclear reactions such as Gd produce charged particle.The ionising radiation sensitive material is subjected to charged particle ionization, excites and de excitation, and produces photon when de excitation.For example, can adopt and mix
6The ZnS scintillator of Li, lithium glass are mixed
6Li or
10The plastic scintillants of B etc. are as the neutron-sensitive scintillator.
Ripple shifting fiber array 21 receives the photon that the neutron-sensitive scintillators produce, and with photon transmission to electrooptical device 23.
In one embodiment, ripple shifting fiber array 21 can comprise first wave shifting fiber layer and Second Wave shifting fiber layer.The residing plane of first wave shifting fiber layer and the residing plane of Second Wave shifting fiber layer are parallel to each other.First wave shifting fiber layer and Second Wave shifting fiber layer all comprise a plurality of optical fiber groups of parallel arrangement, and each optical fiber group comprises one or more optical fiber that is arranged in parallel, and the spacing between the optical fiber can not wait between 0.5～5mm.A plurality of optical fiber groups in the first wave shifting fiber layer are mutually vertical with a plurality of optical fiber groups of Second Wave shifting fiber layer.From the passage of scintillation light of neutron-sensitive scintillator 22 surperficial outgoing, collected, absorb, re-emission and transmit by optical fiber.
In one embodiment, the horizontal ordinate of the first wave shifting fiber Layer Detection neutron incoming position of ripple shifting fiber array 21, the ordinate of the Second Wave shifting fiber Layer Detection neutron incoming position of ripple shifting fiber array 21, thereby obtain neutron on neutron-sensitive scintillator 22 with the nuclear reaction of neutron-sensitive material production, thereby so that the ionising radiation sensitive material produces the two-dimensional position information of photon.For example, the coordinate system of horizontal ordinate and the reference of ordinate institute can be: for take a preset as initial point, take a ray of a plurality of optical fiber groups that is parallel to first wave shifting fiber layer as transverse axis, be parallel to the ray of a plurality of optical fiber groups of Second Wave shifting fiber layer as coordinate system that the longitudinal axis was formed take one.
In one embodiment, the optical fiber in the ripple shifting fiber array 21 can comprise the mutually different covering 211 of density and sandwich layer 212, as shown in Figure 3.Covering 211 is set in the outside surface of sandwich layer 212; Sandwich layer 212 comprises that ripple moves material.Covering 211 has single or multiple lift, and the covering 211 of multilayer can increase the light transmissioning efficiency of ripple shifting fiber.The sandwich layer 212 of ripple shifting fiber contains ripple and moves material, and it is with the photonic absorption of a certain wavelength incident and change into the long photon of wavelength.The photon that incides ripple shifting fiber sandwich layer is absorbed to lay equal stress on launches the long photon of wavelength, and the photon that the wavelength of certain angle emission is grown is at covering 211 and sandwich layer 212 interfaces, and covering 211 and Air Interface total reflection, finally is transferred to the optical fiber two ends.
As a kind of preferred version, electrooptical device 23 can comprise the first electrooptical device and the second electrooptical device.The first electrooptical device is connected with the two ends of a plurality of optical fiber groups of first wave shifting fiber layer.The second electrooptical device is connected with the two ends of a plurality of optical fiber groups of Second Wave shifting fiber layer.
In one embodiment, each the optical fiber group in first wave shifting fiber layer and the Second Wave shifting fiber layer is coupled with single or multiple electrooptical devices respectively.Each optical fiber group is coupled with single electrooptical device respectively, can be less in the number of fibers of ripple shifting fiber array 21, the area of neutron-sensitive scintillator 22 hour uses.And when the number of fibers of ripple shifting fiber array 21 area more, neutron-sensitive scintillator 22 is larger, because the cost cost is than problem, can adopt the multi-anode photomultiplier MA-PMT (Multi-Anode Photo Multiplier Tube) with a plurality of unit that work alone, for example, the H8500 of Japan shore pine, R5900 etc. this class photomultiplier adopts metal passage dynode structure, usually with 2 * 2 with last working cell, on the compact conformation, physical dimension and cost much smaller than the self photomultiplier of identical working cell.Like this each the optical fiber group in the ripple shifting fiber array 21 respectively with single multi-anode photomultiplier on the element coupling that works alone, for example with the H8500MA-PMT of 8 * 8 shop orders can with 64 optical fiber groups couplings.
The neutron position sensor can be connected to form the neutron location detection system with data-acquisition system, so that the electric signal of neutron position sensor output calculates by data-acquisition system, thereby obtains the incoming position information of neutron.In one embodiment, data-acquisition system can be connected with electrooptical device.
Shown in accompanying drawing 4, be the process flow diagram of a kind of embodiment of neutron location detection methods of the present invention.
In this embodiment, the neutron location detection methods comprises:
Step S1: neutron-sensitive scintillator 22 receives neutron and produces photon;
Step S2: ripple shifting fiber array 21 receives the photon that the neutron-sensitive scintillators produce, and with photon transmission to electrooptical device 23;
Step S3: electrooptical device 23 is converted to electric signal and output with the photon of ripple shifting fiber array transmission.
As a kind of preferred version, the step S1 of neutron location detection methods can comprise:
Neutron-sensitive material in the neutron-sensitive scintillator 22 and neutron generation nuclear reaction also produce charged particle;
Ionising radiation sensitive material in the neutron-sensitive scintillator 22 is subjected to charged particle ionization, excites and de excitation, and produces photon when de excitation.
As a kind of preferred version, the step S2 of neutron location detection methods can comprise:
The horizontal ordinate of the first wave shifting fiber Layer Detection neutron incoming position of ripple shifting fiber array 21;
The ordinate of the Second Wave shifting fiber Layer Detection neutron incoming position of ripple shifting fiber array 21;
Wherein, the residing plane of first wave shifting fiber layer and the residing plane of Second Wave shifting fiber layer are parallel to each other; First wave shifting fiber layer and Second Wave shifting fiber layer all comprise a plurality of optical fiber groups of parallel arrangement, and each optical fiber group includes one or more optical fiber that is arranged in parallel; A plurality of optical fiber groups in the first wave shifting fiber layer are mutually vertical with a plurality of optical fiber groups of Second Wave shifting fiber layer.
The coordinate system of above-mentioned horizontal ordinate and the reference of ordinate institute can be: for take a preset as initial point, take a ray of a plurality of optical fiber groups that is parallel to first wave shifting fiber layer as transverse axis, be parallel to the ray of a plurality of optical fiber groups of Second Wave shifting fiber layer as coordinate system that the longitudinal axis was formed take one.
As a kind of preferred version, the neutron location detection methods can also comprise:
S4: data-acquisition system receives the electric signal of electrooptical device 23 outputs, and passing threshold discrimination method or electric charge gravity model appoach, obtains the centre of gravity place that electric signal distributes.The positional information of the corresponding incident neutron of this centre of gravity place can be extrapolated the actual two-dimensional position of incident neutron in conjunction with the positional structure of ripple shifting fiber array 21.
Neutron position sensor of the present invention, detection system and detection method, but neutron detection efficient is high, bearing accuracy is high, n/ γ rejection ratio is high and the advantage such as large-area manufacturing, simultaneously and present other neutron position sensors compare, cheap.
The above is described in detail some embodiments of the present invention.To understand such as those of ordinary skill in the art, whole or any steps or the parts of method and apparatus of the present invention, can be in the network of any computing equipment (comprising processor, storage medium etc.) or computing equipment, realized with hardware, firmware, software or their combination, this is that those of ordinary skills use their basic programming skill just can realize in the situation of understanding content of the present invention, does not therefore need to specify at this.
In addition, it is evident that, when relating to possible peripheral operation in the superincumbent explanation, will use undoubtedly any display device and any input equipment, corresponding interface and the control program that link to each other with any computing equipment.Generally speaking, the hardware of the various operations in the related hardware in computing machine, computer system or the computer network, software and the realization preceding method of the present invention, firmware, software or their combination namely consist of equipment of the present invention and each building block thereof.
In equipment of the present invention and method, obviously, after can decomposing, make up and/or decompose, each parts or each step reconfigure.These decomposition and/or reconfigure and to be considered as equivalents of the present invention.The step that also it is pointed out that the above-mentioned series of processes of execution can order naturally following the instructions be carried out in chronological order, but does not need necessarily to carry out according to time sequencing.Some step can walk abreast or carry out independently of one another.Simultaneously, in the above in the description to the specific embodiment of the invention, can in one or more other embodiment, use in identical or similar mode for the feature that a kind of embodiment is described and/or illustrated, combined with the feature in other embodiment, or the feature in alternative other embodiment.
Should emphasize that term " comprises/comprise " existence that refers to feature, key element, step or assembly when this paper uses, but not get rid of the existence of one or more further feature, key element, step or assembly or additional.
Although described the present invention and advantage thereof in detail, be to be understood that and in the situation that does not exceed the spirit and scope of the present invention that limited by appended claim, can carry out various changes, alternative and conversion.And the application's scope is not limited only to the specific embodiment of the described process of instructions, equipment, means, method and step.The one of ordinary skilled in the art will readily appreciate that from disclosure of the present invention, can use according to the present invention carry out with the essentially identical function of corresponding embodiment described herein or obtain result essentially identical with it, existing and want exploited process, equipment, means, method or step future.Therefore, appended claim is intended to comprise such process, equipment, means, method or step in their scope.
Claims (14)
1. neutron position sensor is characterized in that: comprise electrooptical device, and stacked two neutron-sensitive scintillators and ripple shifting fiber array;
Wherein:
Described two neutron-sensitive scintillators are stacked in respectively the upper and lower both sides of described ripple shifting fiber array;
Described neutron-sensitive scintillator is used for receiving neutron and producing photon;
The photon that the described neutron-sensitive scintillator of described ripple shifting fiber array received produces, and with described photon transmission to electrooptical device;
Described electrooptical device is converted to electric signal and output with the photon of described ripple shifting fiber array transmission.
2. neutron position sensor according to claim 1 is characterized in that:
Described ripple shifting fiber array comprises first wave shifting fiber layer and Second Wave shifting fiber layer, and the described residing plane of first wave shifting fiber layer and the residing plane of described Second Wave shifting fiber layer are parallel to each other;
Described first wave shifting fiber layer and Second Wave shifting fiber layer all comprise a plurality of optical fiber groups of parallel arrangement, and each described optical fiber group includes one or more optical fiber that is arranged in parallel;
A plurality of optical fiber groups in the described first wave shifting fiber layer are mutually vertical with a plurality of optical fiber groups of described Second Wave shifting fiber layer.
3. neutron position sensor according to claim 2 is characterized in that:
Described optical fiber comprises the mutually different covering of density and sandwich layer;
Described covering is set in the outside surface of described sandwich layer;
Described sandwich layer comprises that ripple moves material.
4. neutron position sensor according to claim 1 is characterized in that:
Described neutron-sensitive scintillator comprises neutron-sensitive material and ionising radiation sensitive material;
Wherein, described neutron-sensitive material is used for neutron generation nuclear reaction and produces charged particle;
Described ionising radiation sensitive material is subjected to described charged particle ionization, excites and de excitation, and produces photon when de excitation.
5. neutron position sensor according to claim 2, it is characterized in that: described electrooptical device comprises the first electrooptical device and the second electrooptical device;
Wherein:
Described the first electrooptical device is connected with the two ends of a plurality of optical fiber groups of first wave shifting fiber layer;
Described the second electrooptical device is connected with the two ends of a plurality of optical fiber groups of Second Wave shifting fiber layer.
6. neutron position sensor according to claim 1 is characterized in that: described ripple shifting fiber array by light-guide material or Air Coupling to described electrooptical device.
7. neutron position sensor according to claim 1, it is characterized in that: described electrooptical device comprises one or more of photomultiplier, optical semiconductor detector and charge coupled cell.
8. neutron position sensor according to claim 2 is characterized in that: each the optical fiber group in described first wave shifting fiber layer and the Second Wave shifting fiber layer is coupled with single or multiple electrooptical device respectively.
9. neutron position sensor according to claim 3, it is characterized in that: described neutron-sensitive material comprises
6Li,
10B,
155,157One or more of Gd.
10. neutron location detection system is characterized in that: comprise data-acquisition system and such as the described neutron position sensor of claim 1-9 any one;
Wherein:
Described data-acquisition system is connected with described electrooptical device, is used for receiving the electric signal of described electrooptical device output, and calculates the position of described neutron on described neutron-sensitive scintillator.
11. a neutron location detection methods is characterized in that, comprising:
Step 1: the neutron-sensitive scintillator receives neutron and produces photon;
Step 2: the photon that the described neutron-sensitive scintillator of ripple shifting fiber array received produces, and with described photon transmission to electrooptical device;
Step 3: electrooptical device is converted to electric signal and output with the photon of described ripple shifting fiber array transmission.
12. neutron location detection methods according to claim 11 is characterized in that:
Described step 1 comprises: the neutron-sensitive material in the described neutron-sensitive scintillator and neutron generation nuclear reaction also produce charged particle;
Ionising radiation sensitive material in the described neutron-sensitive scintillator is subjected to described charged particle ionization, excites and de excitation, and produces photon when de excitation.
13. neutron location detection methods according to claim 11 is characterized in that, described step 2 comprises:
The horizontal ordinate of the first wave shifting fiber Layer Detection neutron incoming position of described ripple shifting fiber array;
The ordinate of the Second Wave shifting fiber Layer Detection neutron incoming position of described ripple shifting fiber array;
Wherein, the described residing plane of first wave shifting fiber layer and the residing plane of described Second Wave shifting fiber layer are parallel to each other; Described first wave shifting fiber layer and Second Wave shifting fiber layer all comprise a plurality of optical fiber groups of parallel arrangement, and each described optical fiber group includes one or more optical fiber that is arranged in parallel; A plurality of optical fiber groups in the described first wave shifting fiber layer are mutually vertical with a plurality of optical fiber groups of described Second Wave shifting fiber layer;
The coordinate of described horizontal ordinate and the reference of described ordinate institute is: for take a preset as initial point, take a ray of described a plurality of optical fiber groups that is parallel to described first wave shifting fiber layer as transverse axis, be parallel to the ray of described a plurality of optical fiber groups of described Second Wave shifting fiber layer as coordinate system that the longitudinal axis was formed take one.
14. neutron location detection methods according to claim 11 is characterized in that, also comprises:
Step 4: data-acquisition system receives the electric signal of electrooptical device output, and passing threshold discrimination method or electric charge gravity model appoach, obtains the centre of gravity place that electric signal distributes.
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