CN202102118U - Large-area portable Beta surface contamination monitor - Google Patents
Large-area portable Beta surface contamination monitor Download PDFInfo
- Publication number
- CN202102118U CN202102118U CN2011201915692U CN201120191569U CN202102118U CN 202102118 U CN202102118 U CN 202102118U CN 2011201915692 U CN2011201915692 U CN 2011201915692U CN 201120191569 U CN201120191569 U CN 201120191569U CN 202102118 U CN202102118 U CN 202102118U
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- CN
- China
- Prior art keywords
- wavelength conversion
- optical fiber
- organic glass
- conversion optical
- plastic scintillant
- 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
- 238000011109 contamination Methods 0.000 title abstract description 5
- 239000004033 plastic Substances 0.000 claims abstract description 65
- 229920003023 plastic Polymers 0.000 claims abstract description 65
- 239000013307 optical fiber Substances 0.000 claims abstract description 50
- 238000006243 chemical reaction Methods 0.000 claims abstract description 42
- 239000011521 glass Substances 0.000 claims abstract description 31
- 230000005540 biological transmission Effects 0.000 claims abstract description 22
- 230000003287 optical effect Effects 0.000 claims abstract description 14
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229920002545 silicone oil Polymers 0.000 claims abstract description 5
- 239000000835 fiber Substances 0.000 claims description 21
- 210000004534 cecum Anatomy 0.000 claims description 7
- 239000004411 aluminium Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008676 import Effects 0.000 description 3
- 230000005250 beta ray Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000005041 Mylar™ Substances 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000005269 aluminizing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- UHOVQNZJYSORNB-UHFFFAOYSA-N benzene Substances C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 1
- 230000004397 blinking Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/169—Exploration, location of contaminated surface areas
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measurement Of Radiation (AREA)
Abstract
The utility model discloses a large-area portable Beta surface contamination monitor, which comprises optical organic glass, wavelength conversion optical fibers, a plastic scintillator, an incidence window and a photomultiplier, wherein the plastic scintillator is the thin slice type plastic scintillator, the incidence window is arranged above the plastic scintillator, the optical organic glass is lined below the plastic scintillator, the wavelength conversion optical fibers are embedded on the organic glass side by side, silicone oil is uniformly coated on the optical contact surface, an output end of each of the wavelength conversion optical fibers is connected with a plastic transmission optical fiber, an aluminum reflection layer is plated at the blind end of each of the wavelength conversion optical fibers, all plastic transmission optical fibers are converged to form an optical cable, and the optical cable is in butt joint with the photomultiplier by a flange. The utility model provides the large-area portable Beta surface contamination monitor which is simple in structure, the probing uniformity is good, and the sensitive area is large.
Description
Technical field
The utility model relates to the radiation detection technology field, particularly a kind ofly is used for large tracts of land β surface pollution monitor in the quick portable surveying work place.
Background technology
In Nuclear Accident Emergency, elimination of nuclear facilities process, portable fast measurement radioactive surface contamination is most important.Existing β surface pollution monitor mainly is plastic scintillator detector or flow gas direct ratio technology pipe detector array.Plastic scintillator detector adopts directly relative mode of less sheet type plastic scintillant of area and photomultiplier photocathode.Because the photocathode area is limited, the sensitive area of this surface pollution monitor is generally less than 100cm
2Flow gas proportional counter tube array surface pollution monitor, detection area can reach 1000cm
2, but need the carrier gas support in the work, under complex environment, can't portablely measure.
Disclose a kind of contamination monitor in the external pertinent literature, this monitor is that a wavelength Conversion optical fiber is arranged in the circular embedding photoconduction as the substrate of plastic scintillant, and two photomultipliers are docked at the two ends of wavelength Conversion optical fiber respectively.The sensitive area of the monitor of this structure is less, and the inconsistent situation of homogeneity can occur surveying, and the detection efficiency of detector center is higher relatively, and " dead band " then can appear surveying in fringe region.
At present, the domestic report that does not still have correlation technique document and product.
Summary of the invention
The utility model has overcome deficiency of the prior art, provides a kind of simple in structure, surveys good uniformity, big, the portable large tracts of land β surface pollution monitor of sensitive area.
In order to solve the problems of the technologies described above, the present invention realizes through following technical scheme:
The portable β surface pollution monitor of a kind of large tracts of land; Comprise optics organic glass, wavelength Conversion optical fiber, plastic scintillant, entrance window, photomultiplier; Described plastic scintillant is the sheet type plastic scintillant; The plastic scintillant top is provided with entrance window, and the plastic scintillant below is lined with the optics organic glass; Wavelength Conversion optical fiber embeds on the organic glass side by side, all scribbles silicone oil at the optics surface of contact; Every wavelength Conversion optical fiber output terminal is connected with the plastics Transmission Fibers, and the cecum of wavelength Conversion optical fiber is coated with the aluminium reflection horizon; All plastics Transmission Fibers pool optical cable, and optical cable docks with photomultiplier through flange.
The present invention is all right:
Described wavelength Conversion optical fiber embeds side by side and is meant on the organic glass that wavelength Conversion optical fiber equidistance embeds on the organic glass uniformly side by side.The thickness of described sheet type plastic scintillant is 0.5mm～1.5mm.The thickness of described optics organic glass is 1.5mm～5mm.Described every wavelength Conversion optical fiber output terminal is connected with the plastics Transmission Fibers and is meant that every wavelength Conversion optical fiber light output end is connected through used for epoxy resin optical fiber connecting key with the plastics Transmission Fibers.Described organic glass lower surface scribbles reflectorized material.
Compared with prior art, the invention has the beneficial effects as follows:
(1) the wavelength Conversion optical fiber of the utility model adopts and is arranged side by side on the organic glass of plastic scintillant, has greatly improved the homogeneity of surveying, and has also improved the physical strength of system.
(2) wavelength Conversion optical fiber cecum adopts the magnetically controlled sputter method reflection horizon of aluminizing, and the fluorescence that wavelength Conversion optical fiber is collected at utmost imports the plastics Transmission Fibers into, guarantees to greatest extent to collect to such an extent that fluorescence spreads out of from the plastics Transmission Fibers.
(3) adopt large tracts of land sheet type plastic scintillant, sensitive area can reach 1200cm
2More than, reduce the influence of natural background to greatest extent, simultaneously wavelength Conversion optical fiber is embedded on the plastic scintillant, realize portable type measuring.
(4) wavelength Conversion optical fiber is connected with the plastics Transmission Fibers; Because the light loss of plastics Transmission Fibers unit length is very little; The length of Transmission Fibers can be very long, and long distance can be arranged between photomultiplier and the plastic scintillant, even pollute under the radiation field at strong β like this; Effectively protect photomultiplier unaffected, realized the characteristics that photomultiplier is collected fluorescence signal a long way off.
Description of drawings
The portable β surface pollution monitor of Fig. 1 synoptic diagram
The portable β surface pollution monitor of Fig. 2 schematic cross-section
1 aluminium reflection horizon, 2 wavelength Conversion optical fiber, 3 plastic scintillants, 4 optical fiber connecting keys, 5 plastics Transmission Fibers, 6 optical cable flanges, 7 photomultipliers, 8 entrance windows, 9 optics organic glass, 10 reflecting materials, 11 silicone oil
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:
Like Fig. 1, the portable β surface pollution monitor of a kind of large tracts of land shown in Figure 2, this device adopts large tracts of land sheet type plastic scintillant 3 as detector.Plastic scintillant 3 has the characteristics such as light, durable in use of carrying.This device mainly comprises optics organic glass 9, wavelength Conversion optical fiber 2, plastic scintillant 3, entrance window 8, photomultiplier 7; Plastic scintillant 3 tops are provided with entrance window 8; Entrance window 8 is processed for the mylar that is coated with metal; Entrance window 8 directly overlays plastic scintillant 3 tops, anti-locking system light leak.Plastic scintillant 3 belows are lined with optics organic glass 9, and optics organic glass 9 surfaces have groove side by side, and wavelength Conversion optical fiber 2 is embedded in the groove on optics organic glass 9 surfaces, all scribbles silicone oil 11 at the optics surface of contact.So both solve the difficulty of large tracts of land sheet type plastic scintillant 3 phosphor collections, also improved the physical strength of plastic scintillant 3.
Incident β ray sees through entrance window 8; Sedimentary energy on large tracts of land sheet type plastic scintillant 3; Produce fluorescence; Fluorescence is arranged in the wavelength Conversion optical fiber 2 of optics organic glass 9 surface grooves side by side and is collected, and in order better to improve the homogeneity of surveying, present embodiment preferably adopts wavelength Conversion optical fiber 2 equidistance to embed side by side uniformly in the uniform groove of equidistance on the optics organic glass 9.Consider that plastic scintillant 3 thickness are suitable with wavelength Conversion optical fiber 2 diameters; Can't wavelength Conversion optical fiber 2 be embedded plastic scintillant 3; Simultaneously large tracts of land sheet type plastic scintillant 3 physical strengths are relatively poor, so be lined with optics organic glass 9 on plastic scintillant 3 surfaces, wavelength Conversion optical fiber 2 embeds on the optics organic glass 9 in the groove with plastic scintillant 3 surface of contact; Optics organic glass 9 remaining surface scribble reflectorized material 10, to improve light collection efficiency.
Each root wavelength Conversion optical fiber 2 output terminal is connected through used for epoxy resin optical fiber connecting key 4 with a plastics Transmission Fibers 5; The cecum of wavelength Conversion optical fiber 2 is coated with aluminium reflection horizon 1; Guarantee that to greatest extent the fluorescence of collecting spreads out of from plastics Transmission Fibers 5; All plastics Transmission Fibers 5 pool optical cable, and optical cable docks with photomultiplier 7 photocathode faces through its end optical cable flange 6, and all plastics Transmission Fibers 5 end faces cut open light through meticulous polishing.
Wherein the fibre core of wavelength Conversion optical fiber 2 is a polystyrene, and shell is a polymethyl-benzene olefin(e) acid ester, and operating temperature is-10 ℃～50 ℃.In the utility model wavelength Conversion optical fiber 2 cecums are polished, and the method that adopts magnetron sputtering to aluminize, it is little to the optical fiber damage to aluminize to the optical fiber cecum, and the reflection horizon difficult drop-off.
What influence the utility model detection efficiency has sheet type plastic scintillant 3 thickness; The preferred employing of this enforcement thickness is 0.5mm～1.5mm plastic scintillant 3; The thickness of optics organic glass 9 is in the scope of 1.5mm～5mm, and organic glass is got over Bao Yuehao on the basis that can embed wavelength Conversion optical fiber 2.
The principle of work of this device is following:
Incident β ray sees through entrance window 8; At the interaction sedimentary energy of large tracts of land sheet type plastic scintillant 3 and the fluorescence of supervening; Wavelength Conversion optical fiber 2 in optics organic glass 9 grooves below the plastic scintillant 3 that blinking is arranged is side by side collected, and axially transmits to two ends along wavelength Conversion optical fiber 2.Fluorescence directly imports into or imports plastics Transmission Fibers 5 from cecum into through reflective layer reflects, and pools optical cable along plastics Transmission Fibers 5 and output to photomultiplier 7.
Claims (6)
1. portable β surface pollution monitor of large tracts of land; Comprise optics organic glass, wavelength Conversion optical fiber, plastic scintillant, entrance window, photomultiplier; It is characterized in that; Described plastic scintillant is the sheet type plastic scintillant, and the plastic scintillant top is provided with entrance window, and the plastic scintillant below is lined with the optics organic glass; Wavelength Conversion optical fiber embeds on the organic glass side by side, all scribbles silicone oil at the optics surface of contact; Every wavelength Conversion optical fiber output terminal is connected with the plastics Transmission Fibers, and the cecum of wavelength Conversion optical fiber is coated with the aluminium reflection horizon; All plastics Transmission Fibers pool optical cable, and optical cable docks with photomultiplier through flange.
2. the portable β surface pollution monitor of a kind of large tracts of land according to claim 1 is characterized in that described wavelength Conversion optical fiber embeds on the organic glass side by side and embeds on the organic glass side by side uniformly for wavelength Conversion optical fiber equidistance.
3. the portable β surface pollution monitor of a kind of large tracts of land according to claim 1 is characterized in that the thickness of described sheet type plastic scintillant is 0.5mm～1.5mm.
4. the portable β surface pollution monitor of a kind of large tracts of land according to claim 1 is characterized in that the thickness of described optics organic glass is 1.5mm～5mm.
5. the portable β surface pollution monitor of a kind of large tracts of land according to claim 1; It is characterized in that described every wavelength Conversion optical fiber output terminal is connected with the plastics Transmission Fibers and is meant that every wavelength Conversion optical fiber light output end is connected through used for epoxy resin optical fiber connecting key with the plastics Transmission Fibers.
6. the portable β surface pollution monitor of a kind of large tracts of land according to claim 1 is characterized in that described organic glass lower surface scribbles reflectorized material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201915692U CN202102118U (en) | 2011-06-09 | 2011-06-09 | Large-area portable Beta surface contamination monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201915692U CN202102118U (en) | 2011-06-09 | 2011-06-09 | Large-area portable Beta surface contamination monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202102118U true CN202102118U (en) | 2012-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201915692U Expired - Lifetime CN202102118U (en) | 2011-06-09 | 2011-06-09 | Large-area portable Beta surface contamination monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202102118U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698797A (en) * | 2013-12-30 | 2014-04-02 | 中国原子能科学研究院 | Beta surface polluted-position resolution detector |
| CN103698798A (en) * | 2013-12-30 | 2014-04-02 | 中国原子能科学研究院 | Beta surface polluted-position resolution measurement method |
| CN105044760A (en) * | 2015-06-10 | 2015-11-11 | 南开大学 | Distributed single-end reflection type on-line radioactivity detecting instrument based on scintillation optical fiber and detecting method thereof |
| CN107121693A (en) * | 2017-03-09 | 2017-09-01 | 上海交通大学 | Real-time electronic spectrometer based on film scintillator and fiber array |
| CN108646282A (en) * | 2018-05-31 | 2018-10-12 | 拓世氢源（深圳）科技有限公司 | Gaseous state tritiated water on-line water flushing system based on plastic scintillant |
| CN109358360A (en) * | 2018-11-13 | 2019-02-19 | 中核四0四有限公司 | A kind of annular plastics scintillator and fiber-optic coupling method |
| WO2019062253A1 (en) * | 2017-09-27 | 2019-04-04 | 清华大学 | Array-type large-area total radioactivity detection device |
-
2011
- 2011-06-09 CN CN2011201915692U patent/CN202102118U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698797A (en) * | 2013-12-30 | 2014-04-02 | 中国原子能科学研究院 | Beta surface polluted-position resolution detector |
| CN103698798A (en) * | 2013-12-30 | 2014-04-02 | 中国原子能科学研究院 | Beta surface polluted-position resolution measurement method |
| CN103698798B (en) * | 2013-12-30 | 2015-12-09 | 中国原子能科学研究院 | β surface contamination position resolution measuring method |
| CN105044760A (en) * | 2015-06-10 | 2015-11-11 | 南开大学 | Distributed single-end reflection type on-line radioactivity detecting instrument based on scintillation optical fiber and detecting method thereof |
| CN107121693A (en) * | 2017-03-09 | 2017-09-01 | 上海交通大学 | Real-time electronic spectrometer based on film scintillator and fiber array |
| CN107121693B (en) * | 2017-03-09 | 2019-11-19 | 上海交通大学 | Real-time electronic spectrometer based on film scintillator and fiber array |
| WO2019062253A1 (en) * | 2017-09-27 | 2019-04-04 | 清华大学 | Array-type large-area total radioactivity detection device |
| CN108646282A (en) * | 2018-05-31 | 2018-10-12 | 拓世氢源（深圳）科技有限公司 | Gaseous state tritiated water on-line water flushing system based on plastic scintillant |
| CN109358360A (en) * | 2018-11-13 | 2019-02-19 | 中核四0四有限公司 | A kind of annular plastics scintillator and fiber-optic coupling method |
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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 |
Granted publication date: 20120104 |
|
| CX01 | Expiry of patent term |