CN209102917U - A kind of proton-recoil method fast-neutron detection device - Google Patents
A kind of proton-recoil method fast-neutron detection device Download PDFInfo
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- CN209102917U CN209102917U CN201821319438.6U CN201821319438U CN209102917U CN 209102917 U CN209102917 U CN 209102917U CN 201821319438 U CN201821319438 U CN 201821319438U CN 209102917 U CN209102917 U CN 209102917U
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Abstract
The utility model provides a kind of proton-recoil method fast-neutron detection device.The detection device includes shell, pedestal, detector, hydrogeneous film, bleeding point, seal cover board, connector；The shell is the tube structure of upper end opening, and end edge has the outer peripherally and outwardly extended thereon, and side is equipped with to the bleeding point extended far from shell axis direction；The detector includes detector body and signal output terminal；Wherein, the bleeding point is arranged on the shell, pedestal is equipped in the shell, the pedestal is equipped with hydrogeneous film and detector, the detector is equipped with signal output terminal, which is connected with connector, which is fixed on seal cover board, the seal cover board is fixedly connected with pedestal upper end, and is tightly connected with the outer of shell.Utility model device small volume, structure is simple, measurement accuracy and high reliablity.
Description
Technical field
The utility model belongs to neutron detector technical field more particularly to a kind of proton-recoil method fast-neutron detection dress
It sets.
Background technique
The discovery of neutron makes the research of Nuclear Physics achieve huge progress, with to neutronics theoretical research not
Break perfect, corresponding neutron application technology also grows up, and has been found that neutron in Nuclear Data measurement, fusion reactor material spoke
It is studied according to damage, semiconductor radiation hardening still all has extensively in terms of radioactive breeding, activation analysis, treating cancer etc.
Application prospect.During carrying out basic research and application study to neutron, neutron yield and its measurement just seem especially
Important, neutron yield is highly important basic data, and measurement accuracy directly affects the reliability of other data.
The existing monitoring method to neutron yield in neutron source (such as DD/DT accelerator neutron generator) mainly have to neutron into
The fission chamber and activation method of row relative measurement and the associated particle method and proton-recoil method that absolute measurement is carried out to neutron,
In (1) fission chamber and activation method belong to relative measurement, need other detectors to carry out scale to its detection efficient；(2) companion
Neutron yield is determined by measurement DD/DT associated proton or α particle with particle method, this method accuracy is high, and method is easy, still
Detector will be fixed in accelerator target system, be restricted to using the strong current neutron generator application of large area rotary target；
(3) proton-recoil method measurement data are accurate and complete thus error is smaller, but volume is usually larger, and system structure is more multiple
It is miscellaneous.
Utility model content
The purpose of this utility model is to provide a kind of proton-recoil method fast-neutron detection devices, are based on fast neutron and hydrogen
The recoil proton number that the elastic scattering of atom generates determines fast neutron yield, it is intended to ensure the accuracy of detection data and reliable
Property on the basis of, realize efficient detection and whole device be small in size, structure is simple, flexible arrangement.
The utility model is realized in this way a kind of proton-recoil method fast-neutron detection device, which includes outer
Shell, pedestal, detector, hydrogeneous film, bleeding point, seal cover board, connector；The shell is the tube structure of upper end opening, and its
Upper end edge has the outer peripherally and outwardly extended, and side is equipped with to the bleeding point extended far from shell axis direction；It should
Detector includes detector body and signal output terminal；Wherein,
The bleeding point is arranged on the shell, and pedestal is equipped in the shell, which is equipped with hydrogeneous film and detector, should
Detector is equipped with signal output terminal, which is connected with connector, which is fixed on seal cover board, the seal cover board and
Pedestal upper end is fixedly connected, and is tightly connected with the outer of shell.
Preferably, which is the tube structure of both ends open, and upper end opening is equipped with the first side peripherally and outwardly extended
Edge, lower ending opening is equipped with the second edge peripherally and outwardly extended, and the edge is equipped with the recess that can accommodate detector；
Preferably, the outer of the shell is equipped with several apertures, and is equipped with circumferentially extending by the side in axle center in the aperture
Groove；The first edge and the second edge of the pedestal are respectively equipped with several first apertures and the second aperture；The seal cover board is set
There are several the first fixation holes being adapted with the first outer aperture；The seal cover board is equipped with second be adapted with the outer aperture
Fixation hole；The bleeding point is equipped with the third edge peripherally and outwardly extended.
Preferably, which is the column structure of both ends indent, the size and the inside dimension phase of pedestal of inner fovea part
It adapts to, and the side of the main structure is equipped with to the signal output terminal extended far from axis direction；The center of the seal cover board
Equipped with through-hole.
Preferably, the side at the second edge of the pedestal is equipped with groove.
Preferably, the center of the seal cover board has outside protrusion, and the inside dimension of size and pedestal matches.
Preferably, the bottom periphery of the shell is equipped with shielded layer.
Preferably, the interval for limiting width is equipped between the detector and hydrogeneous film.
Preferably, according to different neutron incident directions select different-thickness hydrogeneous film, thickness range 0.1mm~
Between 2mm.
Compared with the prior art the shortcomings that and deficiency, the utility model has the following beneficial effects: utility model device
Small volume, structure is simple, and detection efficient is high, is quick on the draw, and relatively independent with accelerator, experimental arrangement is flexible, and measurement is accurate
Property and high reliablity.
Detailed description of the invention
Fig. 1 is the overall structure perspective view of the utility model proton-recoil method fast-neutron detection device；
Fig. 2 is the main body front view (A figure) and main body side view (B figure) of the utility model detector；
Fig. 3 is the bottom view of the utility model pedestal；
Fig. 4 be the utility model on 0 ° of direction recoil proton relative differential yield with polyethylene film thickness variation relation
Curve；
Fig. 5 is that the utility model recoil proton relative differential yield on 45 ° of directions is closed with the variation of polyethylene film thickness
System；Wherein:
1- connector；2- seal cover board；The first fixing bolt of 3-；4- bleeding point；The first fixing piece of 5- detector；6- is hydrogeneous thin
The second fixing piece of film；7- detector；8- shielded layer；The hydrogeneous film of 9-；10- pedestal；11- shell；12- sealing ring 12；13-
Two fixing bolts；14- third fixing bolt；15- recess；16- signal output terminal.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example is described in further detail the fixture of the utility model, it should be understood that specific embodiment described herein is only used
To explain the utility model, it is not used to limit the utility model.
As described in Fig. 1~5, wherein Fig. 1 is that the overall structure of the utility model proton-recoil method fast-neutron detection device is saturating
View；Fig. 2 is the main body front view (A figure) and main body side view (B figure) of the utility model detector 7；Fig. 3 is the utility model
The bottom view of pedestal 10；Fig. 4 be the utility model on 0 ° of direction recoil proton relative differential yield with polyethylene film thickness
Variation relation curve；Fig. 5 be the utility model on 45 ° of directions recoil proton relative differential yield with polyethylene film thickness change
Change relationship.
The utility model discloses a kind of proton-recoil method fast-neutron detection device, which includes shell 11, bottom
Seat 10, detector 7, hydrogeneous film 9, bleeding point 4, seal cover board 2, connector 1；The shell 11 is the tube structure of upper end opening,
And end edge has the outer peripherally and outwardly extended thereon, side is equipped with to the pumping extended far from 11 axis direction of shell
Mouth 4；The detector 7 includes 7 main body of detector and signal output terminal 16；Wherein,
The bleeding point 4 is arranged on shell 11, and pedestal 10 is equipped in the shell 11, which is equipped with hydrogeneous film 9
With detector 7, which is equipped with signal output terminal 16, which is connected with connector 1, which is fixed on sealing
On cover board 2, which is fixedly connected with pedestal 10, and is tightly connected with the outer of shell 11.
In the embodiments of the present invention, to promote effective fixation with seal cover board 2 and detector 7, the pedestal 10
For the tube structure of both ends open, and upper end opening is equipped with the first edge peripherally and outwardly extended, lower ending opening be equipped with it is circumferential to
Second edge of outer extension, and the edge is equipped with the recess 15 that can accommodate detector 7.
In the embodiments of the present invention, in order to enhance the leakproofness of seal cover board 2 Yu pedestal 10, the seal cover board 2
Center has outside protrusion, and size and the inside dimension of pedestal 10 match.
In the embodiments of the present invention, in order to which the sealing effect for connecting all parts is more preferable, outside the shell 11
Circumferentially extending groove is equipped with by the side in axle center along equipped with several apertures, and in the aperture；The first of the pedestal 10 and
Two edges are respectively equipped with several first apertures and the second aperture；The seal cover board 2 is equipped with several adaptable with the first outer aperture
The first fixation hole；The seal cover board 2 is equipped with the second fixation hole being adapted with the outer aperture；The bleeding point be equipped with it is circumferential to
The third edge of outer extension.
In the embodiments of the present invention, detector 7, the side at the second edge of the pedestal 10 are set in order to facilitate the installation of
It is fluted.
In the embodiments of the present invention, in order to keep the relative differential yield of recoil proton high, proton spectrum broadening is small
And energy is high, detector 7 is placed on 0 ° of direction, the thickness of hydrogeneous film 9 is set smaller than 2mm, thus in measuring technique
Angle be easier realize.
In the embodiments of the present invention, in order to avoid neutron beam direct projection causes forever detector 7 on detector 7
Damage long, influences the service life of detector 7, detector 7 is placed on 45 ° of directions, the thickness of hydrogeneous film 9 is set as small
It in 0.6mm, also avoids fast neutron that other occur with 7 material of detector in this way and reacts, generate the interference signals such as a particle and proton,
Influence accuracy of measurement.
In the actual application of the utility model, detector 7 is inserted into from the recess 15 of pedestal 10, with detector 7
First fixing piece 5 is fixed on pedestal 10, and hydrogeneous film 9 is close to the first fixing piece 5 and is placed, and is solid by the second fixing piece 6
Fixed, finally by the whole fixed detector 7 of third fixing bolt 14 and hydrogeneous film 9, connector 1 is inserted into the logical of seal cover board 2
Kong Zhong, and be connected with the signal output terminal of detector 7 16, and seal cover board 2 is covered on pedestal 10, so that seal cover board 2
Intermediate protrusion is fully accommodated in the cylinder of pedestal 10, and is fixed by the second fixing bolt 13, and sealing ring 12 is placed
It is placed in 7 shell 11 of detector in the groove of shell 11, then by the device connected, is fixed by the first fixing bolt 3,
It finally installs on mechanical pump on bleeding point 4, in detection device operational process, will be first pumped into the cavity of detection device true
Sky opens accelerator for neutron production and generates neutron, and neutron is beaten on hydrogeneous film 9 after passing through shell 11, and the hydrogen in hydrogeneous film 9 is former
Son and neutron generate elastic scattering, generate recoil proton, these recoil protons are recorded by the measurement of detector 7, are passing through letter
Number output terminal 16 is transported to connector 1, and measurement data is input to microcomputer multichannel software, is counted, is calculated by software
Neutron yield of the hydrogeneous film 9 in measurement range, and then the total yield generated in accelerator for neutron production can be extrapolated.
The small volume of the utility model, structure is simple, and detection efficient is high, is quick on the draw, relatively independent with accelerator, real
Flexible arrangement is tested, measurement data is accurate and complete, and reliability with higher is with a wide range of applications.
In the utility model further embodiment, in order to realize to 7 biasing of detector and output signal, detector
7 be the column structure of both ends indent, and the size of inner fovea part and the inside dimension of pedestal 10 are adapted, and the one of the main structure
Side is equipped with to the signal output terminal 16 extended far from axis direction；The center of the seal cover board 2 is equipped with through-hole, and connector 1 is inserted into
The output for realizing measuring signal is connect in through-hole with signal output terminal 16, it additionally can be by the connector 1 to detector 7
Apply a bias, such as -120V, such neutron beats the recoil proton generated on hydrogeneous film 9, in the sensitive body of detector 7
Electronics-hole pair is produced in product, electronics-hole drifts about under the action of this external electric field, to generate output signal.
In the utility model further embodiment, in order to reduce outer signals to the interference inside detection device, it is somebody's turn to do
The bottom periphery of shell 11 is equipped with shielded layer 8, such as the lead screen layer 8 that can be set with a thickness of 3mm, so that detection device measures
Reliability it is higher.
In the utility model further embodiment, in order to allow detector 7 is as much as possible to receive from hydrogeneous film 9
The recoil proton got is equipped with the interval for limiting width, can effectively improve spy in this way between the detector 7 and hydrogeneous film 9
Survey efficiency.
In the utility model further embodiment, in order to improve the accuracy and reliability of measurement, need according to not
With the hydrogeneous film 9 of neutron incident direction selection different-thickness, thickness range is between 0.1mm~2mm.So as to root
Optimal 9 thickness of hydrogeneous film is chosen according to different neutron incident directions, realizes the measurement of high efficient and reliable.
In the utility model further embodiment, in order to keep overall structure more compact, measurement effect is more managed
Think, more specifically, detection device uses stainless steel casing 11；Detector 7 uses Au Si surface barrier detector 7；Hydrogeneous film 9 uses
Polyethylene film；Seal cover board 2 uses sealing flange；First fixing piece 5 and the second fixing piece 6 are all made of mounting flange；Shielded layer
8 use the lead screen layer 8 of 3mm thickness；Connector 1 uses BNC connector 1, and is connect by coaxial cable with signal output terminal 16；
And the cutting perpendicular to axis of the stainless steel casing 11, Au Si surface barrier detector 7, polyethylene film, shielded layer 8 and bleeding point 4
Face is circular.More specifically, the high 142mm of entire detection device, diameter 108mm, bleeding point 4 is 43mm long, diameter 20mm,
BNC connector 1 is welded on the vacuum state for guaranteeing cavity on sealing flange, which is assembled by the connection type of above-described embodiment
After good, bleeding point 4 and mechanical pump are connected using KF25 vacuum clamp, accelerator for neutron production is opened and is measured, measured as shown in Figure 4
0 ° of direction on recoil proton relative differential yield and polyethylene film thickness variation relation curve；Change incident angle, measures
The variation relation curve of recoil proton relative differential yield and polyethylene film thickness on 45 ° of directions as shown in Figure 5.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (9)
1. a kind of proton-recoil method fast-neutron detection device, which is characterized in that the detection device include shell, pedestal, detector,
Hydrogeneous film, bleeding point, seal cover board, connector；The shell is the tube structure of upper end opening, and end edge has thereon
The outer peripherally and outwardly extended, side are equipped with to the bleeding point extended far from shell axis direction；The detector includes visiting
Survey device main body and signal output terminal；Wherein,
The bleeding point setting on the shell, is equipped with pedestal in the shell, the pedestal is equipped with hydrogeneous film and detector,
The detector is equipped with signal output terminal, and the terminal is connected with connector, and the connector is fixed on seal cover board, described
Seal cover board is fixedly connected with pedestal upper end, and is tightly connected with the outer of shell.
2. detection device according to claim 1, which is characterized in that the pedestal is the tube structure of both ends open, and
Upper end opening is equipped with the first edge peripherally and outwardly extended, and lower ending opening is equipped with the second edge peripherally and outwardly extended, and described
Edge is equipped with the recess that can accommodate detector.
3. detection device according to claim 1, which is characterized in that the outer of the shell is equipped with several apertures, and
Circumferentially extending groove is equipped with by the side in axle center in the aperture；The first edge and the second edge of the pedestal are respectively equipped with
Several first apertures and the second aperture；The seal cover board is equipped with several the first fixation holes being adapted with the first outer aperture；
The seal cover board is equipped with the second fixation hole being adapted with the outer aperture；The bleeding point, which is equipped with, peripherally and outwardly to be extended
Third edge.
4. detection device according to claim 1, which is characterized in that the detector is the column structure of both ends indent,
The size of its inner fovea part and the inside dimension of pedestal are adapted, and the side of the column structure is equipped with to far from axis direction and prolongs
The signal output terminal stretched；The center of the seal cover board is equipped with through-hole.
5. detection device according to claim 1, which is characterized in that the side at the second edge of the pedestal is equipped with recessed
Slot.
6. detection device according to claim 1, which is characterized in that the center of the seal cover board has outward convex
It rises, the inside dimension of size and pedestal matches.
7. detection device according to claim 1, which is characterized in that the bottom periphery of the shell is equipped with shielded layer.
8. detection device according to claim 1, which is characterized in that be equipped with and limit between the detector and hydrogeneous film
The interval of width.
9. detection device according to claim 1, which is characterized in that select different-thickness according to different neutron incident directions
Hydrogeneous film, thickness range is between 0.1mm~2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821319438.6U CN209102917U (en) | 2018-08-16 | 2018-08-16 | A kind of proton-recoil method fast-neutron detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821319438.6U CN209102917U (en) | 2018-08-16 | 2018-08-16 | A kind of proton-recoil method fast-neutron detection device |
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| CN209102917U true CN209102917U (en) | 2019-07-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109143314A (en) * | 2018-08-16 | 2019-01-04 | 兰州大学 | A kind of proton-recoil method fast-neutron detection device |
| WO2022237914A1 (en) * | 2021-11-22 | 2022-11-17 | 山东大学 | Fast neutron detection structure, and method for acquiring neutron energy spectrum |
-
2018
- 2018-08-16 CN CN201821319438.6U patent/CN209102917U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109143314A (en) * | 2018-08-16 | 2019-01-04 | 兰州大学 | A kind of proton-recoil method fast-neutron detection device |
| WO2022237914A1 (en) * | 2021-11-22 | 2022-11-17 | 山东大学 | Fast neutron detection structure, and method for acquiring neutron energy spectrum |
| US11822026B2 (en) | 2021-11-22 | 2023-11-21 | Shandong University | Detection structure for fast neutrons and method for acquiring neutron energy spectrum |
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