CN208506259U - A kind of cold and hot neutron imaging detector of high spatial resolution and detection efficient - Google Patents
A kind of cold and hot neutron imaging detector of high spatial resolution and detection efficient Download PDFInfo
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- CN208506259U CN208506259U CN201821243595.3U CN201821243595U CN208506259U CN 208506259 U CN208506259 U CN 208506259U CN 201821243595 U CN201821243595 U CN 201821243595U CN 208506259 U CN208506259 U CN 208506259U
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Abstract
The utility model relates to the cold and hot neutron imaging detectors of a kind of high spatial resolution and detection efficient, including pedestal, side above pedestal is equipped with cold neutrons conversion screen, the first optical lens and the second optical lens are equipped with positioned at the side of cold neutrons conversion screen on the pedestal, second optical lens connects cooled CCD camera, is fixed with optical mirror between the first optical lens and the second optical lens.The neutron imaging experiment that high spatial resolution, high detection efficient may be implemented using neutron imaging detector described in the utility model, is substantially increased the precision of neutron non-destructive testing, has saved valuable line imaging time.
Description
Technical field
The utility model relates to radiation detection field, the cold and hot neutron of especially a kind of high spatial resolution and detection efficient
Imaging detector.
Background technique
Neutron imaging technology is a kind of efficient irreplaceable non-destructive testing technology, and neutron imaging detector is its center
Center portion part, neutron imaging detector decide the superiority and inferiority of image quality, further influence it and detect quality.Spatial resolution and spy
Surveying efficiency is to determine the key factor of neutron imaging detector, and current neutron imaging detector is by mixed with neutron sensitive material
Thin plastic scintillator film detector (scintillation screen) and optical pickup system composition.Optical pickup system be by optical mirror, optical lens,
The compositions such as CCD or CMOS.
Currently, the problem of generally existing spatial resolution of neutron imaging detector and detection efficient cannot be taken into account, main
Reason is reacted with neutron with sensitive materials caused by generating diffusion of the fluorescence in thin plastic scintillator film detector.When flashing film detection
When the thickness of device increases, the content of neutron sensitive material increases, and the detection efficient of neutron imaging detector increases, but due to light
Its spatial resolution is caused to be deteriorated propagating the diffusion on track.When the thickness for flashing film detection is reduced, neutron and sensitivity
The fluorescence diffusion length that substance reaction generates is shorter, and spatial resolution is higher, but neutron sensitive material content is lower, causes
The detection efficient of sub- imaging detector is lower, and increases imaging time, improves experimental cost.
Utility model content
Purpose of the utility model is to solve defect of the existing technology, a kind of high spatial resolution and spy are provided
Survey the cold and hot neutron imaging detector of efficiency.
To achieve the goals above, the technical solution adopted in the utility model is:
A kind of cold and hot neutron imaging detector of high spatial resolution and detection efficient, including pedestal, one above pedestal
Side is equipped with cold neutrons conversion screen, and the side that cold neutrons conversion screen is located on the pedestal is equipped with the first optical lens and the second optics
Camera lens, the second optical lens connect cooled CCD camera, are fixed with optical reflection between the first optical lens and the second optical lens
Mirror.
Further, the installation direction of first optical lens and the second optical lens is mutually perpendicular to, optical mirror
The angled installation direction of mirror surface and the first optical lens and the second optical lens institute is acute angle.
Further, the bottom of the cooled CCD camera is connect by sliding equipment with pedestal.
Further, the sliding equipment includes being set on the base support base, and support base is equipped with slide-and-guide bar, refrigeration
The fixed sliding seat in the bottom of CCD camera, sliding base sleeve are located on slide-and-guide bar.
Further, the model Andor iKon-LDZ936CCD of the cooled CCD camera.
Further, first optical lens is large aperture camera lens, and second optical lens is Canon 180mm Macro Lens
Head.
Further, the cold neutrons conversion screen is fiber panel structure, specifically: with Tb3+/Ce3+Common sensitization, mixes
Gd2O3Have fiber panel structure scintillation detector be used as cold neutrons conversion screen, have fiber panel structure scintillation detector
With a thickness of 0.4mm, wherein 6 μm of core glass diameter, skin thickness of glass are 1 μm.Gd in core glass2O3Mass content is 15%, Tb3 +/Ce3+Common sensitization, mixes Gd2O3The scintillation detector with fiber panel structure can be realized high spatial resolution and high visit
Survey efficiency.Tb simultaneously3+/Ce3+Common sensitized luminescence can be improved luminous intensity, collect convenient for optical pickup system.
The utility model has the following beneficial effects: high-altitude may be implemented using neutron imaging detector described in the utility model
Between resolution ratio, high detection efficient neutron imaging experiment, substantially increase the precision of neutron non-destructive testing, saved valuable beam
The flow imaging time.
Detailed description of the invention
Fig. 1 is the image for having fiber panel structure scintillation detector using the observation of optical fiber mirror；
Fig. 2 is the structural schematic diagram of the utility model；
Fig. 3 is that the resolution of the utility model high-resolution neutron imaging detector is tested using PSI neutron resolution test target
Rate result figure；
Fig. 4 is the partial structural diagram of the utility model.
Specific embodiment
As shown in Figure 2, Figure 4 shows, the cold and hot neutron imaging detector of a kind of high spatial resolution and detection efficient, including pedestal
1, the side of 1 top of pedestal is equipped with cold neutrons conversion screen 2, and cold neutrons conversion screen 2 is transparent, and cold neutrons conversion screen 2 is located on pedestal 1
Side be equipped with the first optical lens 3 and the second optical lens 4, the second optical lens 4 connect cooled CCD camera 5, the first optics
Optical mirror 6 is fixed between camera lens 3 and the second optical lens 4.
Further, the installation direction of the first optical lens 3 and the second optical lens 4 is mutually perpendicular to, the mirror of optical mirror 6
The angled installation direction of face and the first optical lens 3 and the second optical lens 4 institute is acute angle, wherein cooled CCD camera 5
Model Andor iKon-LDZ936CCD, the first optical lens 3 are large aperture camera lens, and the second optical lens 4 is Canon 180mm
Micro-lens.
In order to facilitate control the distance between the second optical lens 4 and optical mirror 6, the bottom of cooled CCD camera 5 is logical
It crosses sliding equipment to connect with pedestal 1, sliding equipment includes setting in 1 upper support seat 7 of pedestal, and support base 7 is equipped with slide-and-guide
Bar 8, the fixed sliding seat 9 in the bottom of cooled CCD camera 5, sliding seat 9 are set on slide-and-guide bar 8, pass through mobile slide-and-guide
Sliding seat 9 on bar 8 can control cooled CCD camera 5 and move horizontally on pedestal 1, thus the second optical lens 4 of control and light
The distance between reflecting mirror 6 is learned, the single-lens light path of solution tradition is shorter, the poor problem of spatial resolution.
Further, cold neutrons conversion screen is fiber panel structure, specifically: with Tb3+/Ce3+Common sensitization, mixes Gd2O3's
With fiber panel structure scintillation detector as cold neutrons conversion screen 2, as shown in Figure 1, the flashing with fiber panel structure
Detector is with a thickness of 0.4mm, and wherein 6 μm of core glass diameter, skin thickness of glass are 1 μm.Gd in core glass2O3Mass content is
15%, Tb3+/Ce3+Common sensitization, mixes Gd2O3The scintillation detector with fiber panel structure can be realized high-space resolution
Rate and high detection efficient.Tb simultaneously3+/Ce3+Common sensitized luminescence can be improved luminous intensity, collect convenient for optical pickup system.
It is cold to the high detection efficient of high spatial resolution with PSI high-resolution neutron imaging test target on reactor line
Thermal neutron image detector carries out imaging test, obtains a result as shown in figure 3, being 14.5 μm by calculating its spatial resolution.
Show that its detection efficient is 92.3% by test simultaneously.
High spatial resolution may be implemented, in high detection efficient using neutron imaging detector described in the utility model
Sub- imaging experiment substantially increases the precision of neutron non-destructive testing, has saved valuable line imaging time.
Basic principles, main features, and advantages of the present invention has been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only the principles of the present invention, the utility model also has respectively on the premise of not departing from the spirit and scope of the utility model
Kind changes and improvements, these changes and improvements are both fallen in the range of claimed invention.The requires of the utility model
Protection scope defined by appended claims and its equivalent.
Claims (7)
- Side 1. the cold and hot neutron imaging detector of a kind of high spatial resolution and detection efficient, including pedestal, above pedestal Equipped with cold neutrons conversion screen, which is characterized in that be equipped with the first optical lens positioned at the side of cold neutrons conversion screen on the pedestal With the second optical lens, the second optical lens connects cooled CCD camera, fixed between the first optical lens and the second optical lens There is optical mirror.
- 2. the cold and hot neutron imaging detector of a kind of high spatial resolution according to claim 1 and detection efficient, special Sign is that the installation direction of first optical lens and the second optical lens is mutually perpendicular to, the mirror surface of optical mirror and The angled installation direction of one optical lens and the second optical lens institute is acute angle.
- 3. the cold and hot neutron imaging detector of a kind of high spatial resolution according to claim 1 and detection efficient, special Sign is that the bottom of the cooled CCD camera is connect by sliding equipment with pedestal.
- 4. the cold and hot neutron imaging detector of a kind of high spatial resolution according to claim 3 and detection efficient, special Sign is that the sliding equipment includes being set on the base support base, and support base is equipped with slide-and-guide bar, cooled CCD camera The fixed sliding seat in bottom, sliding base sleeve is located on slide-and-guide bar.
- 5. the cold and hot neutron imaging detector of a kind of high spatial resolution according to claim 1 or 3 and detection efficient, It is characterized in that, the model Andor iKon-LDZ936 CCD of the cooled CCD camera.
- 6. the cold and hot neutron imaging detector of a kind of high spatial resolution according to claim 1 or 3 and detection efficient, It is characterized in that, first optical lens is large aperture camera lens, and second optical lens is Canon 180mm micro-lens.
- 7. the cold and hot neutron imaging detector of a kind of high spatial resolution according to claim 1 and detection efficient, special Sign is that the cold neutrons conversion screen is fiber panel structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821243595.3U CN208506259U (en) | 2018-08-03 | 2018-08-03 | A kind of cold and hot neutron imaging detector of high spatial resolution and detection efficient |
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| CN201821243595.3U CN208506259U (en) | 2018-08-03 | 2018-08-03 | A kind of cold and hot neutron imaging detector of high spatial resolution and detection efficient |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884096A (en) * | 2019-04-11 | 2019-06-14 | 北京中百源国际科技创新研究有限公司 | A kind of neutron detection device of high security |
| CN110567814A (en) * | 2019-08-26 | 2019-12-13 | 中国科学院地质与地球物理研究所 | Neutron imaging method for natural gas hydrate sediment triaxial mechanical test |
-
2018
- 2018-08-03 CN CN201821243595.3U patent/CN208506259U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884096A (en) * | 2019-04-11 | 2019-06-14 | 北京中百源国际科技创新研究有限公司 | A kind of neutron detection device of high security |
| CN110567814A (en) * | 2019-08-26 | 2019-12-13 | 中国科学院地质与地球物理研究所 | Neutron imaging method for natural gas hydrate sediment triaxial mechanical test |
| CN110567814B (en) * | 2019-08-26 | 2024-02-20 | 中国科学院地质与地球物理研究所 | Neutron imaging method for triaxial mechanical test of natural gas hydrate sediment |
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