CN109991646B - Measuring chamber for measuring radioactive gas by Si-PINX ray detector - Google Patents
Measuring chamber for measuring radioactive gas by Si-PINX ray detector Download PDFInfo
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- CN109991646B CN109991646B CN201711497081.0A CN201711497081A CN109991646B CN 109991646 B CN109991646 B CN 109991646B CN 201711497081 A CN201711497081 A CN 201711497081A CN 109991646 B CN109991646 B CN 109991646B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
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- 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
- G01T1/167—Measuring radioactive content of objects, e.g. contamination
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- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention relates to the field of radioactive gas measurement, in particular to a measuring chamber for measuring radioactive gas by a Si-PINX ray detector, wherein the X ray detector is directly inserted into a tank body of the measuring chamber, and an O-shaped sealing ring outside a cylindrical X ray detector is pressed into an arc groove arranged on the tank body; a PIPS detector is buckled on the inner side surface of a tank cover of the gas measuring chamber, and a BNC vacuum joint is arranged on the outer side surface of the tank cover through threads; the two Si-PINX ray detectors are sequentially sleeved with a fastener and an O-shaped sealing ring and are inserted into a tank body of the gas measuring chamber through the fastener and the O-shaped sealing ring; the air inlet/outlet hole is connected with the air passage through the quick connector; a sealing washer is placed on the inner bottom surface of the tank body of the gas measuring chamber, and the tank cover presses the sealing washer onto the tank body. The invention avoids the attenuation of X-ray and improves the detection efficiency; and an X-ray detector and a PIPS detector are respectively arranged on two sides of the gas measuring chamber and can be used for coincidence measurement of X-rays and beta-rays.
Description
Technical Field
The invention relates to the field of radioactive gas measurement, and meets the measurement requirement that a radioactive gas measurement chamber and an X-ray detector probe are integrally sealed and packaged, and no sealing medium exists between the detector probe and the measured gas.
Background
In the field of radioactive gas measurement, the radioactive gas to be measured is usually confined in a closed measurement chamber and maintains a good sealing property. The common radioactive gas measuring chamber is designed with a measuring window, namely a sealing medium between a probe of a detector and a measured gas. In order to reduce the attenuation effect of the medium on X or gamma rays, the measuring window is generally made of low-density aluminum alloy or carbon and has a thickness of about 1 mm. However, if the object of measurement is an X-ray having an energy of only several tens keV, the slice measurement window may severely attenuate the X-ray. The measuring chamber for measuring the radioactive gas by the Si-PINX ray detector disclosed by the patent hermetically encapsulates the gas measuring chamber and the X ray detector integrally, and no sealing medium exists between the detector probe and the measured gas, so that the attenuation of X rays is reduced remarkably, and the measuring efficiency is improved. In addition, an X-ray detector and a PIPS detector are respectively arranged on two sides of the gas measuring chamber, and the gas measuring chamber has the function of coincidence measurement of X-rays and beta-rays.
The literature comparison and analysis shows that the domestic device research and the manufacturers with the same structure as the device of the invention have no literature report.
Disclosure of Invention
The invention is assembled by a Si-PIN detector, a PIPS detector, a tank body, a BNC vacuum joint, a tank cover, an air inlet/outlet hole, a quick-plug joint, a fastener, an O-shaped sealing ring, a sealing washer and a support; the X-ray detector is directly inserted into a tank body of the gas measuring chamber, and an O-shaped sealing ring outside the cylindrical X-ray detector is pressed into an arc groove arranged on the tank body; a PIPS detector is buckled on the inner side surface of a tank cover of the gas measuring chamber, and a BNC vacuum joint is arranged on the outer side surface of the tank cover through threads; the size of the inner space of the hollow cavity of the gas measuring chamber is phi 52mm multiplied by 4.5 mm; the two Si-PINX ray detectors are sequentially sleeved with a fastener and an O-shaped sealing ring and are inserted into a tank body of the gas measuring chamber through the fastener and the O-shaped sealing ring; the four threaded holes of the fastener are aligned with the tank body and are mutually screwed through a screw, the inner side surface of a tank cover of the gas measuring chamber is buckled with the PIPS detector, and the outer side surface of the tank cover is fixedly provided with a BNC vacuum joint through threads; the air inlet/outlet hole is connected with the air passage through the quick connector; a sealing washer is placed on the inner bottom surface of the tank body of the gas measuring chamber, and the tank cover presses the sealing washer onto the tank body.
The invention relates to a measuring chamber for measuring radioactive gas by a Si-PINX ray detector, which comprises a Si-PIN detector, a PIPS detector, a tank body, a BNC vacuum joint (with an O-shaped sealing ring), a tank cover, an air inlet/outlet hole, a quick-connection joint, a fastener, an O-shaped sealing ring, a sealing washer, a support and the like. The device is assembled as shown in figure 1.
The function implementation mode is as follows: (1) the X-ray detector is directly inserted into the tank body of the gas measuring chamber, and an O-shaped sealing ring outside the cylindrical X-ray detector is pressed into the arc groove, so that windowless sealing between the X-ray detector and the gas measuring chamber is realized; (2) the inner side surface of a tank cover of the gas measuring chamber is buckled with the PIPS detector, and the outer side surface of the tank cover is screwed with a threaded vacuum BNC joint to realize windowless sealing between the PIPS ray detector and the gas measuring chamber; (3) a sealing washer is placed on the inner bottom surface of a tank body of the gas measuring chamber, a tank cover is screwed in to press the sealing washer, a hollow cavity of the gas measuring chamber is formed, the size of the inner space is phi 52mm multiplied by 4.5mm, and the gas measuring chamber can be used for coincidence measurement of X rays and beta rays.
The device has the following innovation points: a windowless sealing design is adopted between the X-ray detector and the gas measuring chamber, so that the attenuation of X-rays is avoided, and the detection efficiency is improved; and an X-ray detector and a PIPS detector are respectively arranged on two sides of the gas measuring chamber and can be used for coincidence measurement of X-rays and beta-rays.
Drawings
FIG. 1 is a front view structural diagram of the present invention;
in fig. 1: the detector comprises a silicon-PINX ray detector 1, a fastener 2, an O-shaped sealing ring 3, a tank body 4, a tank cover 5, a PIPS detector 6, a BNC vacuum joint 7, an air inlet/outlet hole 8, a quick connector 9, a sealing washer 10 and a support 11.
Detailed Description
The device comprises a Si-PINX ray detector 1, a fastener 2, an O-shaped sealing ring 3, a tank body 4, a tank cover 5, a PIPS detector 6, a BNC vacuum joint 7, an air inlet/outlet hole 8, a quick connector 9, a sealing washer 10 and a support 11.
According to the invention of the assembly device shown in the figure 1, 2 Si-PINX ray detectors 1 are sequentially sleeved with fasteners 2 and O-shaped sealing rings 3 and then inserted into a tank body 4 of a gas measurement chamber; the four threaded holes of the fastener 2 are aligned with the tank body 4, and four screws are screwed tightly, so that uniform force is required, subsection precession is required, and opposite angles are alternated; the inner side surface of a tank cover 5 of the gas measuring chamber is buckled with a PIPS detector 6, and the outer side surface of the tank cover 5 is screwed with a BNC vacuum joint 7 with threads; the air inlet/outlet holes 8 are connected with other air passages through quick connectors 9; a sealing washer 10 is placed on the inner bottom surface of the tank body 4 of the gas measuring chamber, and a tank cover 5 is screwed in to press the sealing washer, so that a sealed radioactive gas measuring chamber is formed; in order to fix the measuring chamber, it is mounted on the support 11 as a whole; connecting an external air passage of a vacuum pump through a quick connector 9, vacuumizing, and quickly pulling out the external air passage after negative pressure is stable to obtain a vacuum measuring chamber; the gas path of the radioactive gas to be measured is connected with the quick connector 9, and after the diffusion is completed, the measurement of the radioactive gas by the Si-PINX ray detector and the PIPS detector can be realized.
The Si-PIN X-ray detector is directly inserted into the gas measuring chamber, and an O-shaped sealing ring outside the cylindrical X-ray detector is pressed into the arc groove, so that windowless sealing between the X-ray detector and the gas measuring chamber is realized. In addition, an X-ray detector and a PIPS detector are respectively arranged on two sides of the gas measuring chamber, and the gas measuring chamber has the function of coincidence measurement of X-rays and beta-rays.
The fastener 2, the can body 4 and the can cover 5 are made of aluminum.
The O-shaped sealing ring 3 and the sealing washer 10 are both made of butadiene-acrylonitrile rubber.
Claims (1)
1. A measuring chamber for measuring radioactive gas by a Si-PINX ray detector is characterized in that: the device is formed by assembling a Si-PIN detector, a PIPS detector, a tank body, a BNC vacuum joint, a tank cover, an air inlet/outlet hole, a quick-plug joint, a fastener, an O sealing ring, a sealing washer and a support; the X-ray detector is directly inserted into a tank body of the gas measuring chamber, and an O-shaped sealing ring outside the cylindrical X-ray detector is pressed into an arc groove arranged on the tank body; a PIPS detector is buckled on the inner side surface of a tank cover of the gas measuring chamber, and a BNC vacuum joint is arranged on the outer side surface of the tank cover through threads; the size of the inner space of the hollow cavity of the gas measuring chamber is phi 52mm multiplied by 4.5 mm; the two Si-PINX ray detectors are sequentially sleeved with a fastener and an O-shaped sealing ring and are inserted into a tank body of the gas measuring chamber through the fastener and the O-shaped sealing ring; the four threaded holes of the fastener are aligned with the tank body and are mutually screwed through a screw, the inner side surface of a tank cover of the gas measuring chamber is buckled with the PIPS detector, and the outer side surface of the tank cover is fixedly provided with a BNC vacuum joint through threads; the air inlet/outlet hole is connected with the air passage through the quick connector; a sealing washer is placed on the inner bottom surface of the tank body of the gas measuring chamber, and the tank cover presses the sealing washer onto the tank body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711497081.0A CN109991646B (en) | 2017-12-31 | 2017-12-31 | Measuring chamber for measuring radioactive gas by Si-PINX ray detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711497081.0A CN109991646B (en) | 2017-12-31 | 2017-12-31 | Measuring chamber for measuring radioactive gas by Si-PINX ray detector |
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| Publication Number | Publication Date |
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| CN109991646A CN109991646A (en) | 2019-07-09 |
| CN109991646B true CN109991646B (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711497081.0A Active CN109991646B (en) | 2017-12-31 | 2017-12-31 | Measuring chamber for measuring radioactive gas by Si-PINX ray detector |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112068186A (en) * | 2020-07-16 | 2020-12-11 | 中国人民解放军63653部队 | Beta/internal conversion electronic vacuum measuring device |
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| CN203561749U (en) * | 2013-10-24 | 2014-04-23 | 中国人民解放军63653部队 | An improved carbon fiber window radioactive gas measuring box |
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2017
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| US6774370B1 (en) * | 1999-11-12 | 2004-08-10 | Hamamatsu Photonics K.K. | Positron imaging device |
| CN101806910A (en) * | 2010-05-11 | 2010-08-18 | 西北核技术研究所 | Method and device for absolutely measuring for radioactive gas nuclide activity |
| CN203561749U (en) * | 2013-10-24 | 2014-04-23 | 中国人民解放军63653部队 | An improved carbon fiber window radioactive gas measuring box |
| CN203616482U (en) * | 2013-12-10 | 2014-05-28 | 上海市计量测试技术研究院 | Measuring system for detection efficiency of airbone radioactive iodine measuring instrument |
| CN204009085U (en) * | 2014-07-15 | 2014-12-10 | 中广核工程有限公司 | A kind of nuclear power plant hydrogeneous waste gas radioactivity continuous monitoring device |
| CN104597473A (en) * | 2014-12-26 | 2015-05-06 | 北京放射性核素实验室 | Inflatable beta detector for measuring radioactive gas nuclide |
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