CN203773061U - Light sealing structure of alpha and beta ray detector - Google Patents
Light sealing structure of alpha and beta ray detector Download PDFInfo
- Publication number
- CN203773061U CN203773061U CN201420080207.XU CN201420080207U CN203773061U CN 203773061 U CN203773061 U CN 203773061U CN 201420080207 U CN201420080207 U CN 201420080207U CN 203773061 U CN203773061 U CN 203773061U
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- China
- Prior art keywords
- detection window
- sealing structure
- detector
- light
- ray detector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000005250 beta ray Effects 0.000 title claims abstract description 21
- 238000007789 sealing Methods 0.000 title claims abstract description 20
- 230000005260 alpha ray Effects 0.000 title abstract 2
- 238000001514 detection method Methods 0.000 claims abstract description 32
- 239000002985 plastic film Substances 0.000 claims description 21
- 229910021418 black silicon Inorganic materials 0.000 claims description 19
- 229920001971 elastomer Polymers 0.000 claims description 19
- 239000005060 rubber Substances 0.000 claims description 19
- 230000001681 protective effect Effects 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000005855 radiation Effects 0.000 abstract description 5
- 239000004033 plastic Substances 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 239000000741 silica gel Substances 0.000 abstract description 2
- 229910002027 silica gel Inorganic materials 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract 1
- 239000010408 film Substances 0.000 description 19
- 239000000203 mixture Substances 0.000 description 4
- 238000011109 contamination Methods 0.000 description 3
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000011104 metalized film Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Measurement Of Radiation (AREA)
Abstract
The utility model relates to the field of a sealing structural design of a nuclear radiation scintillation detector, and particularly relates to a light sealing structure of an alpha and beta ray detector in a slice plastic scintillator and photomultiplier combination mode. A previous detector carries out one-time sealing on edge gaps required to be sealed in assembling by adopting black liquid silica gel in order to achieve an ideal light shielding effect, and the detector is difficult to be opened again, thereby being not conducive to field maintenance. Meanwhile, a film and a shell are damaged, thereby being difficult to be recycled and reused. The light sealing structure provided by the utility model carries out light shielding by using a light shielding combination body formed by a slice plastic scintillator, a light shielding film and a black silica gel ring, a boss at the bottom part of the combination body is arranged in a groove of the top part of the side wall of a detection window, and a labyrinth mode cross section is provided. Light sealing for the detection window is realized by mainly depending on elastic contact between the black silica gel ring and the light shielding film, the side wall of the detection window and a protection cover.
Description
Technical field
The utility model relates to a kind of nuclear radiation scintillation detector light sealing structure, particularly relates to the α of a kind of thin plastic sheet scintillator and photomultiplier array configuration, the light sealing structure of β-ray detector.
Background technology
α, β-ray detector are the sensors that fixed personnel whole body, brothers α, β contamination monitor and portable surface are infected with instrument etc., α, the β ray be infected with tested person surface can be detected rapidly, whether are subject to radioactive contamination with differentiation personnel.Be mainly used in the aspects such as the personal contamination monitoring in the radiation work places such as nuclear power station, core treatment plant, core warehouse.
The α of thin plastic sheet scintillator and photomultiplier array configuration, the principle of β-ray detector are: thin plastic sheet scintillator and photomultiplier are placed in a light shield darkroom, thin plastic sheet scintillator is positioned at detection window position, darkroom, the outside lucifuge film as thin as a wafer that adopts covers, prevent that extraneous light from entering in optical dark room, and avoid stopping α, β ray as far as possible.Work as α, when β ray is passed lucifuge film and is entered thin slice scintillator by detection window, the atom of scintillator or molecule are ionized or excite, when de excitation, part ionization or excitation energy discharge with optical radiation form, form passage of scintillation light, passage of scintillation light is collected on the negative electrode of photomultiplier in light shield darkroom, photon produces photoelectron after being absorbed by negative electrode, photoelectron doubles under dynode effect, finally absorbed generation current signal by anode, current signal is converted into voltage signal through oversampling circuit, again through amplifying and comparator circuit, produce and export a TTL pulse, follow-up single chip circuit obtains this pulse, and counted number of pulses is sent to host computer by serial ports, can understand more accurately the photon number of the passage of scintillation light that scintillator sends by the shown counted number of pulses of host computer.Photon number again with ray type, energy, activity, relevant with the distance of detector etc.Thereby realize the Radiation monitoring to measured object.
Due to α, β ray (especially low energy α, β ray, as
14c) range is limited, a little less than penetration power, so in the time carrying out α, beta-ray detection, in order to reach desirable detection efficiency, require the surface density of detection window lucifuge film as far as possible little, thus the encapsulation of detection window is brought to certain difficulty.
When practical operation, detection window lucifuge material is selected tygon metallized film.Tygon metallized film thickness is generally less than 5 μ m.Detector in the past; in order to reach desirable light-shading effect; it between thin plastic sheet scintillator, lucifuge film, detector housing, protective cover, is hard contact; in the time of assembling, adopt black liquor silica gel to carry out disposable sealing to the gap of this engagement edge; more difficult while again opening detector, be unfavorable for on-site maintenance, film and housing also go to pot simultaneously; be difficult to recycling, cause waste.
Summary of the invention
The purpose of this utility model is to provide a kind of α, β-ray detector detection window light sealing structure, have advantages of simple in structure, reliability is high, maintainability good, assembly period is short, part can reuse.
A kind of α described in the utility model, β-ray detector light sealing structure, comprise detector housing, light shield assembly, protective cover, detector housing detection window wall leaves seam, light shield assembly is placed on seam, the interior outer buckle clamping along buckle and detector housing surrounding of protective cover surrounding; Light shield assembly comprises thin plastic sheet scintillator, lucifuge film, black silicon cushion rubber, concrete connected mode is: lucifuge film is wrapped on outside surface, the side one week and inner surface edge of thin plastic sheet scintillator test surface, black silicon cushion rubber is clamped the thin plastic sheet scintillator edge that wraps up lucifuge film; The boss of black silicon cushion rubber bottom and the groove of detection window top side wall have the drafting angle of 4 °～6 °, and boss and groove fit tightly.
Adopt two-layer, three layers or four layers of lucifuge film to wrap up thin plastic sheet scintillator outside surface, one week, side and inner surface edge, composition passage of scintillation light shielding assembly, effectively lucifuge.Protective cover is connected with detection window outer buckle along buckle by interior, and aiming screen covers assembly forward and compresses and locate.The Elastic Contact of the light sealing main dependence black silicon cushion rubber of detection window and lucifuge film, detection window sidewall, protective cover realizes.
The boss (being positioned at black silicon cushion rubber bottom) of assembly bottom is placed in the groove of detection window top side wall, and object has two, and the one, strengthen the lateral register to assembly, the 2nd, contact and realize light sealing by labyrinth, both are fitted tightly.
Black silicon cushion rubber described in the utility model is consistent with detection window shape, and total length is more smaller than thin plastic sheet scintillator girth, and cross section is C shape.Lucifuge film 6 be two-layer, three layers or four layers.
Black silicon cushion rubber, by mould-injection process moulding, has certain elasticity, and girth is more smaller than thin plastic sheet scintillator girth, cross section is C shape, utilize C shape opening and silica gel ring self elasticity that the scintillator edge that wraps up lucifuge film is clamped, thus composition light shield assembly, more effectively lucifuge.
Detection window described in the utility model is rectangle, square or circular.
The beneficial effects of the utility model:
1, the light shield assembly of thin plastic sheet scintillator, lucifuge film, black silicon cushion rubber composition, assembly technology is simple, and assembly period is short, and each parts can reuse, and are applicable to very much on-site maintenance.Overcome conventional detectors maintenance cost high, the shortcoming that maintenance cycle is long.
2, detector detection window light sealing structure reliability is high, anti-vibration, and light-shading effect is good, and sample-out count can reach the level in light shield darkroom.
Brief description of the drawings
The cut-open view of Fig. 1 α, β-ray detector detection window Width
The cut-open view of Fig. 2 α, β-ray detector detection window length direction
A point partial enlarged drawing in Fig. 3 Fig. 1
Wherein: 1. detector housing; 2. light shield assembly; 3. protective cover; 4 black silicon cushion rubbers; 5. thin plastic sheet scintillator; 6. lucifuge film; 7. seam; 8. boss; 9. groove; 10. outer buckle; 11. is interior along buckle.
Embodiment
Below in conjunction with accompanying drawing, embodiment, the utility model is described in further detail.
Embodiment 1
Detector detection window described in the utility model is rectangle, on detector housing 1 sidewall, leaves seam 7, the interior placement light shield of seam 7 assembly 2, and light shield assembly 2 comprises thin plastic sheet scintillator 5, lucifuge film 6, black silicon cushion rubber 4; The outer button protective cover 3 of seam 7.Adopt three layers of lucifuge film 6 to wrap up thin plastic sheet scintillator 5 outside surfaces, one week, side and inner surface edge.Black silicon cushion rubber 4 is rectangle, consistent with detection window shape, by mould-injection process moulding, there is certain elasticity, while stretching, total length is more smaller than thin plastic sheet scintillator 5 girths, cross section is C shape, after black silicon cushion rubber 4 is slightly firmly stretched, utilizes C shape opening and self elasticity that thin plastic sheet scintillator 5 edges that wrap up lucifuge film 6 are clamped, thus composition passage of scintillation light shielding assembly 2.The boss 8 that is positioned at black silicon cushion rubber 4 bottoms of light shield assembly 2 bottoms, is placed in the groove 9 of detection window top side wall, and boss 8 adds with groove 9 drafting angle that all leaves 4 °～6 ° man-hour, and boss 8 fits tightly with groove 9.Object has two, and the one, reinforcement aiming screen covers the lateral register of assembly 2, and the 2nd, contact and realize lucifuge by labyrinth.Protective cover 3 clamps along buckle 11 and housing outer buckle 10 by interior, and aiming screen covers assembly 2 forwards and compresses and locate.The lucifuge of detection window mainly relies on black silicon cushion rubber 4 and the Elastic Contact of lucifuge film 6, plastic scintillant 5, detector housing 1, protective cover 3 to realize.
Fig. 1 has shown the position of Width detector housing 1, light shield assembly 2 and protective cover 3 and matching relationship has been installed.
Fig. 2 has shown the position of length direction detector housing 1, light shield assembly 2 and protective cover 3 and matching relationship has been installed.
Fig. 3 has shown the installation matching relationship of light shield assembly 2 each component part black silicon cushion rubbers 4, thin plastic sheet scintillator 5, lucifuge film 6, has shown the be clasped relation of protective cover 3 with housing 1.
Embodiment 2
Detector detection window described in the utility model can be also square, circular, oval or other shapes.
To proving by the test result of the principle prototype of the utility model design, adopt the technical solution of the utility model, α, β-ray detector are simple in structure, and assembly period is short, and reliability is high, and maintainability is good, is applicable to field maintemance, and useful detection area is large.
Claims (4)
1. a α, β-ray detector light sealing structure, it is characterized in that: this detector light sealing structure comprises detector housing (1), light shield assembly (2), protective cover (3), detector housing (1) detection window wall leaves seam (7), it is upper that light shield assembly (2) is placed on seam (7), and the interior of protective cover (3) surrounding clamps along buckle (10) and the outer buckle (11) of detector housing (1) surrounding; Light shield assembly (2) comprises thin plastic sheet scintillator (5), lucifuge film (6), black silicon cushion rubber (4), concrete connected mode is: lucifuge film (6) is wrapped on outside surface, the side one week and inner surface edge of thin plastic sheet scintillator (5) test surface, black silicon cushion rubber (4) is clamped thin plastic sheet scintillator (5) edge that wraps up lucifuge film (6); The boss (8) of black silicon cushion rubber (4) bottom has the drafting angle of 4 °～6 ° with the groove (9) of detection window top side wall, and boss (8) fits tightly with groove (9).
2. by a kind of α claimed in claim 1, β-ray detector light sealing structure, it is characterized in that: black silicon cushion rubber (4) is consistent with detection window shape, cross section is C shape.
3. by a kind of α claimed in claim 1, β-ray detector light sealing structure, it is characterized in that: lucifuge film (6) for two-layer, three layers or four layers.
4. by a kind of α claimed in claim 1, β-ray detector light sealing structure, it is characterized in that: detection window is rectangle, square or circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420080207.XU CN203773061U (en) | 2014-02-25 | 2014-02-25 | Light sealing structure of alpha and beta ray detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420080207.XU CN203773061U (en) | 2014-02-25 | 2014-02-25 | Light sealing structure of alpha and beta ray detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203773061U true CN203773061U (en) | 2014-08-13 |
Family
ID=51290238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420080207.XU Expired - Lifetime CN203773061U (en) | 2014-02-25 | 2014-02-25 | Light sealing structure of alpha and beta ray detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203773061U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104934087A (en) * | 2015-06-12 | 2015-09-23 | 同方威视技术股份有限公司 | Lead shielding structure of non-detection surface of scintillant |
| CN106291653A (en) * | 2015-06-29 | 2017-01-04 | 中国辐射防护研究院 | The total α of fluid, the continuous on-line monitoring method of Total Beta Radioactivity and device |
| CN112180420A (en) * | 2020-04-21 | 2021-01-05 | 宁波甬东核辐射监测有限公司 | Plastic scintillator and preparation method thereof, and beta particle detector |
-
2014
- 2014-02-25 CN CN201420080207.XU patent/CN203773061U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104934087A (en) * | 2015-06-12 | 2015-09-23 | 同方威视技术股份有限公司 | Lead shielding structure of non-detection surface of scintillant |
| CN106291653A (en) * | 2015-06-29 | 2017-01-04 | 中国辐射防护研究院 | The total α of fluid, the continuous on-line monitoring method of Total Beta Radioactivity and device |
| CN112180420A (en) * | 2020-04-21 | 2021-01-05 | 宁波甬东核辐射监测有限公司 | Plastic scintillator and preparation method thereof, and beta particle detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140813 |