CN210038175U - Detector for measuring activity of radioactive inert gas - Google Patents
Detector for measuring activity of radioactive inert gas Download PDFInfo
- Publication number
- CN210038175U CN210038175U CN201920416659.3U CN201920416659U CN210038175U CN 210038175 U CN210038175 U CN 210038175U CN 201920416659 U CN201920416659 U CN 201920416659U CN 210038175 U CN210038175 U CN 210038175U
- Authority
- CN
- China
- Prior art keywords
- inert gas
- light guide
- photomultiplier
- radioactive inert
- 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 - Fee Related
Links
- 239000011261 inert gas Substances 0.000 title claims abstract description 21
- 230000002285 radioactive effect Effects 0.000 title claims abstract description 21
- 230000000694 effects Effects 0.000 title claims abstract description 16
- 239000004033 plastic Substances 0.000 claims abstract description 21
- 229920003023 plastic Polymers 0.000 claims abstract description 21
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 8
- 239000010936 titanium Substances 0.000 claims abstract description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 7
- 239000010935 stainless steel Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 4
- 238000005070 sampling Methods 0.000 claims description 13
- 239000000523 sample Substances 0.000 claims description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 229910000889 permalloy Inorganic materials 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 7
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 2
- 210000004907 gland Anatomy 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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- Measurement Of Radiation (AREA)
Abstract
The utility model relates to a nuclear protection technical field provides a detector for measuring radioactive inert gas activity ratio, including sample cavity, plastics scintillator, light guide, photomultiplier, circuit board etc.. The sample cavity is cylindrical structure, by thin wall stainless steel material preparation, the calibration hole is left to the cylinder bottom to being furnished with the calibration hole stopper, detecting components and parts comprise plastics scintillator, light guide and photomultiplier, detecting components and parts's shell is thin wall stainless steel seal structure, and it is isolated to adopt ultra-thin titanium film between plastics scintillator and the sample cavity, can effectively avoid the pollution of radioactive inert gas to the scintillator under the prerequisite of guaranteeing detection efficiency. The utility model is used for measure the detector of radioactive inert gas activity ratio, simple structure, sensitivity is high, and the operation is stable.
Description
Technical Field
The utility model relates to a nuclear protection technical field, specific detector for measuring radioactive inert gas activity ratio that says so.
Background
At present, the detector for measuring the activity of the radioactive inert gas mainly adopts a silicon semiconductor detection element, which is expensive, low in sensitivity and easily influenced by gamma rays. Therefore, it is necessary to design a radioactive inert gas detection device which has high sensitivity, is economical and is insensitive to gamma rays.
Disclosure of Invention
The utility model aims at overcoming the shortcomings in the prior art, providing a detector for measuring radioactive inert gas activity degree, its sensitivity is high, the stable performance has high gamma suppression ratio.
In order to achieve the above object, the utility model adopts the following technical scheme: a detector for measuring the activity of radioactive inert gas comprises a sampling cavity, a plastic scintillator, a light guide, a photomultiplier tube, a circuit board and the like. The sample cavity is cylindrical structure, by thin wall stainless steel material preparation, the calibration hole is left to the cylinder bottom to being furnished with the calibration hole stopper, detecting components and parts comprise plastics scintillator, light guide and photomultiplier, detecting components and parts's shell is thin wall stainless steel seal structure, and it is isolated to adopt ultra-thin titanium film between plastics scintillator and the sample cavity, can effectively avoid the pollution of radioactive inert gas to the scintillator under the prerequisite of guaranteeing detection efficiency.
The plastic scintillator is tightly matched and attached with the light guide, the side surface of the light guide is coated with the back scattering aluminum film, the connecting surface of the light guide and the photomultiplier is coated with the organic silicon oil, and the partial pressure tube seat of the photomultiplier is fixed with the preamplifier board through the circuit board seat.
In the technical scheme, the light guide is processed into a conical structure, the area of the bottom of the light guide is consistent with that of the plastic scintillator, and the area of the top of the light guide is the same as that of the photomultiplier.
In the technical scheme, a layer of permalloy is wrapped outside the photomultiplier to serve as a shielding layer.
In the technical scheme, the thickness of the titanium film between the plastic scintillator and the sampling cavity is 0.2 mm.
In the technical scheme, three sections of flexible rubber rings are arranged between the photomultiplier and the detector shell so as to prevent the photomultiplier sintered by the vacuum glass from being damaged when the device vibrates.
The utility model is used for measure the detector of radioactive inert gas activity ratio, simple structure, sensitivity is high, and the operation is stable.
Drawings
Fig. 1 is a schematic structural diagram of the detector for measuring radioactive inert gas activity of the present invention.
Wherein: 1. the device comprises a calibration hole plug, 2. a sampling cavity, 3. a titanium film gland, 4. a sealing gasket, 5. a plastic scintillator, 6. a detection element shell, 7. a back scattering aluminum film, 8. a titanium film, 9. a light guide, 10. permalloy, 11. a photomultiplier, 12. a rubber ring, 13. a circuit board, 14. a spring, 15. a probe gland and 16. a sealing connector.
Fig. 2 is an appearance schematic diagram of the present invention.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings and embodiments.
As shown in fig. 1 and 2, the present embodiment provides a detector for measuring activity of radioactive inert gas, which includes a probe and a lead shield outside the probe, wherein the probe includes a gas sampling cavity 2, a plastic scintillator 5, a coupling light guide 9, a photomultiplier tube 11, a circuit board 13, a damping spring 14, and the like. The sampling cavity 2 is of a cylindrical structure and is made of thin-wall stainless steel materials, a calibration hole is reserved at the bottom of the cylinder and is provided with a sampling calibration hole plug 1, the detection component is composed of a plastic scintillator 5, a light guide 9 and a photomultiplier tube 11, a shell 6 of the detection component is of a thin-wall stainless steel sealing structure, the sampling cavity 2 is isolated from the plastic scintillator 5 through a titanium film 8, the plastic scintillator 5 is tightly matched and attached with the light guide 9, the light guide 9 is processed into a conical structure, the area of the bottom of the light guide 9 is consistent with that of the plastic scintillator 5, and the area of the top of the light guide 9 is the same as. The back scattering aluminum film 7 is coated on the conical surface of the light guide, organic silicon oil is coated on the connecting surface of the light guide 9 and the photomultiplier tube 11, a layer of permalloy 10 is coated outside the photomultiplier tube 11 to serve as a shielding layer, a partial pressure tube seat of the photomultiplier tube 11 and a front amplification plate are fixed through a circuit board seat, and three sections of flexible rubber rings 12 are arranged between the photomultiplier tube 11 and the shell 6 to prevent the photomultiplier tube sintered by vacuum glass from being damaged during vibration of equipment. A spring 14 is used between the probe gland 15 and the circuit board seat to prevent the internal devices from shaking. The sealed connector 16 adopts a waterproof socket to ensure the whole device to be waterproof and moistureproof.
After entering the plastic scintillator 5, the radioactive inert gas β is converted into scintillation light, which enters the photomultiplier tube 11 through the coupling light guide 9, and the scintillation light signal is converted into a current pulse signal by the photomultiplier tube 11, amplified by the circuit board 13, and transmitted to the signal processing device.
In the above embodiment, the joints between the calibration plug 1 and the sampling cavity 2, between the sampling cavity 2 and the detecting element housing 6, and between the detecting element housing 6 and the probe gland 15 are all sealed by means of pressing the sealing rings.
Details not described in the present specification belong to the prior art known to those skilled in the art.
The above-described embodiments are merely for convenience of illustrating the present invention in detail, and are not limited to the examples, but are within the scope of the appended claims, or various modifications and changes made by those skilled in the art without departing from the scope and spirit of the present invention.
Claims (5)
1. A detector for measuring activity of radioactive inert gas comprises a sampling cavity, a plastic scintillator for receiving β rays of the radioactive inert gas, a light guide and a photomultiplier, and is characterized in that the sampling cavity is of a cylindrical structure and is made of thin-wall stainless steel materials, a calibration hole is reserved at the bottom of a cylinder and is provided with a calibration hole plug, the sampling cavity is isolated from the plastic scintillator through an ultrathin titanium film, the plastic scintillator is tightly matched and attached to the light guide, the side face of the light guide is coated with an anti-scattering aluminum film, and the connection face of the light guide and the photomultiplier is coated with organic silicon oil.
2. A probe for measuring the activity of a radioactive inert gas according to claim 1, wherein: the light guide is processed into a conical structure, the area of the bottom of the light guide is consistent with that of the plastic scintillator, and the area of the top of the light guide is the same as that of the photomultiplier.
3. A probe for measuring the activity of a radioactive inert gas according to claim 1, wherein: and a layer of permalloy is wrapped outside the photomultiplier to be used as a shielding layer.
4. A probe for measuring the activity of a radioactive inert gas according to claim 1, wherein: the thickness of the titanium film between the plastic scintillator and the sampling cavity is 0.2 mm.
5. A probe for measuring the activity of a radioactive inert gas according to claim 1, wherein: three sections of flexible rubber rings are arranged between the photomultiplier and the detector shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920416659.3U CN210038175U (en) | 2019-03-29 | 2019-03-29 | Detector for measuring activity of radioactive inert gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920416659.3U CN210038175U (en) | 2019-03-29 | 2019-03-29 | Detector for measuring activity of radioactive inert gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210038175U true CN210038175U (en) | 2020-02-07 |
Family
ID=69357191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920416659.3U Expired - Fee Related CN210038175U (en) | 2019-03-29 | 2019-03-29 | Detector for measuring activity of radioactive inert gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210038175U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111505697A (en) * | 2020-05-26 | 2020-08-07 | 中国科学技术大学 | A high-performance muon spin detector |
| CN111596338A (en) * | 2020-05-26 | 2020-08-28 | 上海仁机仪器仪表有限公司 | Small-window surface pollution detector |
| CN111913206A (en) * | 2020-07-22 | 2020-11-10 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Movable airborne radioactivity online monitoring system and method |
| CN111999758A (en) * | 2020-09-23 | 2020-11-27 | 北京滨松光子技术股份有限公司 | MPPC-based small-sized beta detector for particulate matter monitoring |
| CN112180417A (en) * | 2020-04-21 | 2021-01-05 | 宁波甬东核辐射监测有限公司 | Inert gas measuring device and inert gas measuring method |
| 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 |
| CN112285760A (en) * | 2020-11-17 | 2021-01-29 | 公安部第一研究所 | Double-inspection mode detector |
| CN113466275A (en) * | 2021-06-10 | 2021-10-01 | 纳境鼎新粒子科技(广州)有限公司 | Electronic detector |
| CN113534231A (en) * | 2021-06-25 | 2021-10-22 | 陕西卫峰核电子有限公司 | High-humidity inert gas activity monitoring system and monitoring method |
| CN115290403A (en) * | 2022-08-05 | 2022-11-04 | 华能核能技术研究院有限公司 | Radioactive inert gas compression sampling bottle and detection device containing the same |
-
2019
- 2019-03-29 CN CN201920416659.3U patent/CN210038175U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112180417A (en) * | 2020-04-21 | 2021-01-05 | 宁波甬东核辐射监测有限公司 | Inert gas measuring device and inert gas measuring method |
| 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 |
| CN111505697A (en) * | 2020-05-26 | 2020-08-07 | 中国科学技术大学 | A high-performance muon spin detector |
| CN111596338A (en) * | 2020-05-26 | 2020-08-28 | 上海仁机仪器仪表有限公司 | Small-window surface pollution detector |
| CN111913206A (en) * | 2020-07-22 | 2020-11-10 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Movable airborne radioactivity online monitoring system and method |
| CN111999758A (en) * | 2020-09-23 | 2020-11-27 | 北京滨松光子技术股份有限公司 | MPPC-based small-sized beta detector for particulate matter monitoring |
| CN112285760A (en) * | 2020-11-17 | 2021-01-29 | 公安部第一研究所 | Double-inspection mode detector |
| CN113466275A (en) * | 2021-06-10 | 2021-10-01 | 纳境鼎新粒子科技(广州)有限公司 | Electronic detector |
| CN113534231A (en) * | 2021-06-25 | 2021-10-22 | 陕西卫峰核电子有限公司 | High-humidity inert gas activity monitoring system and monitoring method |
| CN115290403A (en) * | 2022-08-05 | 2022-11-04 | 华能核能技术研究院有限公司 | Radioactive inert gas compression sampling bottle and detection device containing the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200207 Termination date: 20210329 |