CN204044370U - A kind of microchannel neutron tracing instrument - Google Patents
A kind of microchannel neutron tracing instrument Download PDFInfo
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- CN204044370U CN204044370U CN201420471512.1U CN201420471512U CN204044370U CN 204044370 U CN204044370 U CN 204044370U CN 201420471512 U CN201420471512 U CN 201420471512U CN 204044370 U CN204044370 U CN 204044370U
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Abstract
The utility model relates to a kind of microchannel neutron tracing instrument, comprise a probe, a high-voltage section and a power supply, described high-voltage section connects described power supply and described probe, the electric energy accepting the supply of described power supply provides high voltage level for described probe, it is characterized in that: described probe comprises a housing, an entrance window, a high-pressure stage, a microchannel plate and a display screen.Neutron conversion is integrated in same device with electron multiplication and has worked, greatly saved volume; Have employed one deck direct transmission window, improve measuring accuracy; Have employed curved tube microchannel plate, decrease measuring error; High-voltage section and power supply are integrated in handle, have reduced volume, made equipment use more convenient; Display screen can accept electronics, can obtain intensity and the positional information of neutron simultaneously; Detection sensitivity is high, and the faint neutron beam revealed when can realize every square centimeter of several neutron per second detects.
Description
Technical field
The utility model relates to radioactivity detection field, especially a kind of microchannel neutron tracing instrument.
Background technology
Neutron scattering spectrometer, when debugging, needs the relative position of each neutron optics parts of accurate adjustment, optimizes the quality of neutron streaming, measures to facilitate subsequent experimental; Also need to ensure that neutron streaming is not revealed, to ensure radiation safety simultaneously.This just needs a kind of neutron beam intensity and position detecting device of real time portable, monitors along the pointwise of neutron streaming direction.Common neutron two-dimension position-sensitive detector generally comprises several part: probe, signal transacting electronics module, power supply, signal processing software etc.Usual neutron signal is finally input to computer terminal to carry out storing, show and processing.Device overall volume is huge, portability is poor.Urgently there is a kind of portable neutron two-dimension position-sensitive detector now, the detection of neutron signal, process, display are integrated together, facilitate experimenter to detect quality and the shielding leak case of neutron streaming at the scene whenever and wherever possible, improve work on the spot efficiency.
In view of above-mentioned defect, the utility model creator obtains this creation finally through long research and practice.
Utility model content
The purpose of this utility model is to provide a kind of microchannel neutron tracing instrument, in order to overcome above-mentioned technological deficiency.
For achieving the above object, the utility model provides a kind of microchannel neutron tracing instrument, comprises a probe, a high-voltage section and a power supply, and described high-voltage section connects described power supply and described probe, the electric energy accepting the supply of described power supply provides high voltage level for described probe, it is characterized in that:
Described probe comprises a housing, an entrance window, a high-pressure stage, a microchannel plate and a display screen;
Described housing both sides are respectively arranged with the display screen of described entrance window and the display neutron position injected for neutron beam to be measured, and described microchannel plate and described entrance window are set in parallel in described housing for the neutron detected is converted to electron cloud;
Described high-pressure stage comprises a top electrode and a hearth electrode, the described hearth electrode being arranged at described entrance window rear applies no-voltage, applies positive voltage and coordinate, in described probe, form electric field with the described top electrode being arranged at described display screen rear.
Preferably, described microchannel plate comprises some microchannels, and described microchannel is the rectangular parallelepiped of middle-end bending, and radial section is square.
Preferably, described probe also comprises a direct transmission window, is positioned at outside described display screen, for stopping that external light source is incident to described enclosure interior.
Preferably, described probe also comprises a glass seal layer, is positioned at outside described direct transmission window, for the protection of described display screen and described direct transmission window.
Preferably, described high-pressure stage also comprises a microchannel top electrode and a microchannel hearth electrode of being close to described microchannel plate upper and lower surface, and described microchannel top electrode is described microchannel hearth electrode is with the metal level with described microchannel radial section same shape through hole;
Described microchannel top electrode is positioned at the side near described top electrode, and described microchannel hearth electrode is positioned at the side near described hearth electrode, and described microchannel top electrode voltage is higher than described microchannel hearth electrode.
Preferably, described probe also comprises one second microchannel plate, be arranged in parallel with described microchannel plate.
Preferably, described probe also comprises a recording unit, and described camera is caught processor and the storer that image procossing becomes data by the camera, that described recording unit comprises neutron trace on the described display screen of a seizure.
Preferably, it also comprises one handle, and described handle is fixedly connected with described probe, and in described high-voltage section and described power supply are wrapped in.
Preferably, described incidence window is aluminium sheet, thickness 2 ~ 5mm;
Described direct transmission window is aluminium plated film, and thickness is
Described microchannel plate thickness is 0.3 ~ 3mm, described microchannel diameter 6 ~ 15 μm, microchannel wall thickness 2 ~ 3 μm.
Preferably, described hearth electrode, microchannel hearth electrode, microchannel top electrode and voltage that top electrode applies are respectively 0V, 300V, 2000V, 5000V.
The beneficial effects of the utility model are compared with the prior art: provide a kind of microchannel neutron tracing instrument, neutron conversion have been integrated in same device with electron multiplication and have worked, greatly saved volume; Have employed one deck direct transmission window, improve measuring accuracy; Have employed curved tube microchannel plate, decrease measuring error; High-voltage section and power supply are integrated in handle, have reduced volume, made equipment use more convenient; Display screen can accept electronics, can obtain intensity and the positional information of neutron simultaneously; Detection sensitivity is high, and the faint neutron beam revealed when can realize every square centimeter of several neutron per second detects.
Accompanying drawing explanation
Fig. 1 is tracing instrument embodiment one structural representation described in the utility model;
Fig. 2 is tracing instrument embodiment one sonde configuration figure described in the utility model;
Fig. 3 is tracing instrument embodiment two structural representation described in the utility model;
Fig. 4 is tracing instrument embodiment three sonde configuration figure described in the utility model;
Fig. 5 is tracing instrument embodiment four sonde configuration figure described in the utility model;
Fig. 6 is tracing instrument embodiment five sonde configuration figure described in the utility model;
Fig. 7 is tracing instrument embodiment six sonde configuration figure described in the utility model;
Fig. 8 is tracing instrument embodiment seven sonde configuration figure described in the utility model.
Embodiment
Below in conjunction with accompanying drawing, to above-mentioned being described in more detail with other technical characteristic and advantage of the utility model.
Embodiment one
Shown in Figure 1, Fig. 1 is neutron tracing instrument embodiment one structural representation described in the utility model.
It comprises, probe A 1, high-voltage section A2 and power supply A3
Described probe A 1 is positioned at equipment foremost, accepts to catch to accept and detection display neutron; Described high-voltage section A2 between described probe A 1 and described power supply A3, and is connected with the two, for providing high pressure to described probe A 1; Described power supply A3 is connected with described high-voltage section A2, powers for giving described high-voltage section A2.Described power supply A3 can be battery, also can the power-supply unit of external mobile power supply or charger baby and so on.
Refer to Fig. 2, shown in, Fig. 2 is neutron tracing instrument embodiment one probe A 1 structural representation described in the utility model.
Described probe A 1 comprises a housing 1a, an entrance window 2a, a high-pressure stage, a microchannel plate 4a, a display screen 5a.
Described housing 1a is for supporting the agent structure of described probe A 1, and it is a seal chamber structure, and its front is provided with described entrance window 2a, for incident for neutron to be detected; Afterbody is provided with described display screen, and the neutron being incident to described tracing instrument is shown as one a little louder through probe process on described display screen 5a.Thus tester is observed.
Described high-pressure stage comprises multiple different high pressure step, in embodiment one, comprise an a sole plate 31a and climax plate 34a, described sole plate 31a accesses large ground voltage, described climax plate 34a accesses high pressure, thus form directed electric field in described probe A 1 inside, charged particle is wherein moved along direction of an electric field, and shows on described display screen 5a.
Described housing 1a inside arranges a microchannel plate 4a, and described microchannel plate 4a comprises numerous microchannels, be arranged in parallel with described entrance window 2a; As shown in Figure 2, microchannel in described microchannel plate 4a has bending, and off-gauge cylindrical or rectangular micro-tunnel, the advantage so arranged is, for the neutron of any any angle incident from described entrance window 1a, capital ensures on the conduit wall of the microchannel touched in described microchannel plate 4a, stopped due to, such as adopt cylindrical or rectangular micro-tunnel, occur being parallel to completely the neutron of channel direction incidence, just can cause omission, cause measuring misalignment.
As follows to the detection process of neutron: by described probe placement near neutron beam, neutron is injected in the cavity of described housing 1a through described incidence window 2a, and clashes in the microchannel wall of described microchannel plate 4a.Adulterate in neutron and described microchannel wall
10there is nuclear reaction in B, produces
7li and
4he particle,
7li and
4the outgoing from the wooden partition of microchannel of He particle, strike in contiguous microchannel wall under the effect of the electric field formed at described high-pressure stage and produce electronic secondary, generate a large amount of avalanche electrons through serial avalanche multiplication subsequently, avalanche electrons group finally incides on described display screen 5a and forms fluorescence hot spot.That is, by whole tracing instrument close to neutron beam, each neutron all can form a point on described display screen 5a, thus operator can be made tentatively to determine the quality of neutron beam or the situation of shielding leakage easily, thus determines next step action.
In the present embodiment, described entrance window 2a is aluminum window, and thickness is 3mm, and described hearth electrode 31a, described top electrode 34a are aluminium sheet, thickness 1mm, described display screen 5a thickness 1.5mm.
Described microchannel plate 4a is doping
10the microchannel plate of B, described microchannel radial cross-sectional shape is square, and described microchannel plate 4a diameter is 10 μm, and channel wall thickness is 2.5 μm, and above-mentioned microchannel plate 4a thickness is 1.5mm.Employing is mixed
10the microchannel plate of B, namely neutron-sensitive element is directly doped in the glass baseplate of microchannel plate, and in detection process, the multiplication of the conversion and electronics that simultaneously achieve neutron at described microchannel plate 4a place is amplified, and reduces device overall volume of knowing clearly widely.
Described hearth electrode 31a accesses 0V voltage, and described top electrode 34a accesses 5000V voltage.
The present embodiment is surveyed, high to the position resolution of neutron, can reach 15 μm to the position resolution of cold neutron.
Embodiment two
Shown in Figure 3, Fig. 3 is the utility model embodiment two structural representation.
Embodiment two is similar to embodiment one, and difference is, it also comprises shank A4 on the other hand, and in described high-voltage section A2 and described power supply A3 is integrated in by described handle portion A4, convenient operation personnel grip simultaneously.
Described handle portion A4 mono-section is fixedly connected with described probe A 1, and it can make operator when using tracing instrument detected neutron, more flexible to the operation of tracing instrument.
Neutron tracing instrument volume described in embodiment two is very little, and use flexibly, physical dimension 60mm × 60mm, useful detection area is 50mm × 50mm, and thickness is only 25mm.
Embodiment three
Shown in Figure 4, Fig. 4 is the utility model embodiment four sonde configuration schematic diagram.
Tracing instrument as described in above-described embodiment, in embodiment four, probe A 1 comprises a housing 1b, an entrance window 2b, high-pressure stage, a microchannel plate 4b, a display screen 5b; High-pressure stage comprises an a top electrode 34b and hearth electrode 31b.It also comprises a Unidirectional transparent film 6b, described Unidirectional transparent film 6b can stop from described display screen 5b direction and attempts to be incident to the light in described housing 1b, and the ght transmission that the electron cloud allowing the neutron detected to be formed is formed on described display screen 5b is to outside described housing 1b, and operator is made to capture neutron detection image.
Setting like this, makes measuring accuracy greatly improve, and can have a strong impact on spike instrument performance from the light of external incident, time serious, even makes instrument work.
In the present embodiment, described Unidirectional transparent film 6b is
aluminium film, add described Unidirectional transparent film 6b, not only measuring accuracy can be improved, eliminate external interference, can also slightly promote fluoroscopic mechanical property, because display screen material of main part is glass, so very fragile sometimes, described Unidirectional transparent film 6b can promote the mechanical property of described display screen 5b slightly, comprises toughness, tension, and entirety can not be made while elevating gear performance to become heavier.
In the present embodiment, described entrance window 2b is aluminum window, and thickness is 5mm, and described hearth electrode 31b, described top electrode 34b are aluminium sheet, thickness 1mm, described display screen 5b thickness 2mm.
Described microchannel plate 4b is doping
10the microchannel plate of B, described microchannel cross section shape is square, and described microchannel plate 4b diameter is 15 μm, and channel wall thickness is 3 μm, and above-mentioned microchannel plate 4b thickness is 3mm.
Embodiment four
Shown in Figure 5, Fig. 5 is the structural drawing that the utility model embodiment four is popped one's head in.
Described in embodiment described above, embodiment four probe A 1 comprises a housing 1c, an entrance window 2c, high-pressure stage, a microchannel plate 4c, a display screen 5c; High-pressure stage comprises a top electrode 34c, a hearth electrode 31c and a Unidirectional transparent film 6c.
In embodiment four, described microchannel plate 4c comprises one first microchannel plate and one second microchannel plate, described two microchannel plates be arranged in parallel, entered into after in the cavity of described housing 1c by described entrance window 2c at neutron, be introduced in described first microchannel plate, first generation avalanche electrons group in described first microchannel plate, subsequently, the electron cloud produced leaves described first microchannel plate, enter described second microchannel plate, the microchannel wall of described second microchannel plate carries out secondary avalanche effect, produce larger avalanche electrons group, get on described display screen 5c.Through the amplification of twice microchannel plate, the quality of avalanche electrons group significantly improves, and on display screen 5c, the spike point of display can become more clear, is particularly conducive to the situation that neutron beam quality is lower, can detects the neutron radiation of minute quantity observantly.
In the present embodiment, in the present embodiment, described entrance window 2c is aluminum window, and thickness is 2mm, and described hearth electrode 31c, described top electrode 34c are aluminium sheet, thickness 0.2mm, described display screen 5c thickness 1mm.
Described microchannel plate 4c is doping
10the microchannel plate of B, described microchannel cross section shape is square, and described microchannel plate 4c diameter is 6 μm, and channel wall thickness is 3 μm, and above-mentioned microchannel plate 4c thickness is 3mm.Described Unidirectional transparent film 6c is aluminium film, and thickness is
Embodiment five
Shown in Figure 6, Fig. 6 is the structural drawing that the utility model embodiment five is popped one's head in.
Described in embodiment described above, embodiment five probe A 1 comprises a housing 1d, an entrance window 2d, high-pressure stage, a microchannel plate 4d, a display screen 5d and a Unidirectional transparent film 6d; High-pressure stage comprises a top electrode 34d, a hearth electrode 31d and a Unidirectional transparent film 6d.It also comprises a seal glass plate 7d, and shown seal glass plate 7d is positioned at outside described Unidirectional transparent film 6d, can play the effect of protection to described display screen 5d, described Unidirectional transparent film 6d.
In the present embodiment, in the present embodiment, described entrance window 2d is aluminum window, and thickness is 2mm, and described hearth electrode 31d, described top electrode 34d are aluminium sheet, thickness 0.2mm, described display screen 5d thickness 1mm.
Described microchannel plate 4c is doping
10the microchannel plate of B, described microchannel cross section shape is square, and described microchannel plate 4d diameter is 6 μm, and channel wall thickness is 2 μm, and above-mentioned microchannel plate 4d thickness is 0.3mm.Described Unidirectional transparent film 6d is aluminium film, and thickness is
Embodiment six
Shown in Figure 7, Fig. 7 is the structural drawing that the utility model embodiment six is popped one's head in.
Described in embodiment described above, embodiment six probe A 1 comprises a housing 1f, an entrance window 2f, high-pressure stage, a microchannel plate 4f, a display screen 5f and a Unidirectional transparent film 6f, a seal glass plate 7f; High-pressure stage comprises a top electrode 34f, a hearth electrode 31f.Described high pressure stage also comprises an a microchannel top electrode 33f and microchannel hearth electrode 32f.
Described microchannel top electrode 33f and described microchannel hearth electrode 32f is the very thin sheet metal with the grid in the hole of the shape that to match with microchannel fitted tightly with described microchannel plate 4f upper and lower surface, and in the present embodiment, thickness is 0.5mm.
In the present embodiment, described high-pressure stage comprises described top electrode 34f, described microchannel top electrode 33f, described microchannel hearth electrode 32f and described hearth electrode 31f, four electrodes form an electrode gradient, in the present embodiment, described top electrode 34f accesses 0V, described microchannel top electrode 33f and accesses 300V, described microchannel hearth electrode access 2000V, described hearth electrode access 5000V.So magnitude of voltage is set, unnecessary electric field can be reduced in non-microchannel portion, required voltage can be reduced to greatest extent, and electric field is concentrated on the position needing electric field height to concentrate, to reduce power consumption as far as possible.
Embodiment seven
Shown in Figure 8, Fig. 8 is the structural drawing that the utility model embodiment seven is popped one's head in.
Described in embodiment described above, embodiment six probe A 1 comprises a housing 1g, an entrance window 2g, high-pressure stage, a microchannel plate 4g, a display screen 5g and a Unidirectional transparent film 6g; High-pressure stage comprises a top electrode 34g, a hearth electrode 31g, a microchannel top electrode 33g and a microchannel hearth electrode 32g.
In embodiment eight, described probe A 1 also comprises a recording unit 8g, the image that described recording unit 8g shows above for the treatment of described display screen 5g, and forms log file.
Described handling part 8g comprises a camera, a processor and a storer, described camera can catch the point shown on described display 5g, being changed into electric power signal delivers in described processor, the time that neutron occurs by described processor and coordinate record, deliver to described storer to store, convenient operation personnel carry out checking in the later stage and add up.
Described microchannel top electrode 33g and described microchannel hearth electrode 32g, thickness is 0.2 ~ 1mm.
The foregoing is only preferred embodiment of the present utility model, is only illustrative for utility model, and nonrestrictive.Those skilled in the art is understood, and requires to carry out many changes to it in the spirit and scope that limit, amendment in utility model right, even equivalent, but all will fall in protection domain of the present utility model.
Claims (10)
1. a microchannel neutron tracing instrument, comprises a probe, a high-voltage section and a power supply, and described high-voltage section connects described power supply and described probe, and the electric energy accepting the supply of described power supply provides high voltage level for described probe, it is characterized in that:
Described probe comprises a housing, an entrance window, a high-pressure stage, a microchannel plate and a display screen;
Described housing both sides are respectively arranged with the display screen of described entrance window and the display neutron position injected for neutron beam to be measured, and described microchannel plate and described entrance window are set in parallel in described housing for the neutron detected is converted to electron cloud;
Described high-pressure stage comprises a top electrode and a hearth electrode, the described hearth electrode being arranged at described entrance window rear applies no-voltage, applies positive voltage and coordinate, in described probe, form electric field with the described top electrode being arranged at described display screen rear.
2. microchannel as claimed in claim 1 neutron tracing instrument, it is characterized in that, described microchannel plate comprises some microchannels, and described microchannel is the rectangular parallelepiped of middle-end bending, and radial section is square.
3. microchannel as claimed in claim 1 neutron tracing instrument, it is characterized in that, described probe also comprises a direct transmission window, is positioned at outside described display screen, for stopping that external light source is incident to described enclosure interior.
4. microchannel as claimed in claim 3 neutron tracing instrument, it is characterized in that, described probe also comprises a glass seal layer, is positioned at outside described direct transmission window, for the protection of described display screen and described direct transmission window.
5. the microchannel neutron tracing instrument according to any one of Claims 1-4, it is characterized in that, described high-pressure stage also comprises a microchannel top electrode and a microchannel hearth electrode of being close to described microchannel plate upper and lower surface, and described microchannel top electrode is described microchannel hearth electrode is with the metal level with described microchannel radial section same shape through hole;
Described microchannel top electrode is positioned at the side near described top electrode, and described microchannel hearth electrode is positioned at the side near described hearth electrode, and described microchannel top electrode voltage is higher than described microchannel hearth electrode.
6. microchannel as claimed in claim 3 neutron tracing instrument, it is characterized in that, described probe also comprises one second microchannel plate, be arranged in parallel with described microchannel plate.
7. the microchannel neutron tracing instrument as described in claim 3 or 6, it is characterized in that, described probe also comprises a recording unit, and described camera is caught processor and the storer that image procossing becomes data by the camera, that described recording unit comprises neutron trace on the described display screen of a seizure.
8. the microchannel neutron tracing instrument as described in claim 3 or 6, it is characterized in that, it also comprises one handle, and described handle is fixedly connected with described probe, and in described high-voltage section and described power supply are wrapped in.
9. the microchannel neutron tracing instrument any one of claim 3 or 6 as described in claim, is characterized in that, described incidence window is aluminium sheet, thickness 2 ~ 5mm;
Described direct transmission window is aluminium plated film, and thickness is
Described microchannel plate thickness is 0.3 ~ 3mm, described microchannel diameter 6 ~ 15 μm, microchannel wall thickness 2 ~ 3 μm.
10. microchannel as claimed in claim 9 neutron tracing instrument, it is characterized in that, described hearth electrode, microchannel hearth electrode, microchannel top electrode and voltage that top electrode applies are respectively 0V, 300V, 2000V, 5000V.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420471512.1U CN204044370U (en) | 2014-08-20 | 2014-08-20 | A kind of microchannel neutron tracing instrument |
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| CN201420471512.1U CN204044370U (en) | 2014-08-20 | 2014-08-20 | A kind of microchannel neutron tracing instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215998A (en) * | 2014-08-20 | 2014-12-17 | 中国原子能科学研究院 | Micro-channel neutron tracing instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215998A (en) * | 2014-08-20 | 2014-12-17 | 中国原子能科学研究院 | Micro-channel neutron tracing instrument |
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