CN202939314U - Proportional counter for detecting gaseous tritium - Google Patents
Proportional counter for detecting gaseous tritium Download PDFInfo
- Publication number
- CN202939314U CN202939314U CN201220497714.4U CN201220497714U CN202939314U CN 202939314 U CN202939314 U CN 202939314U CN 201220497714 U CN201220497714 U CN 201220497714U CN 202939314 U CN202939314 U CN 202939314U
- Authority
- CN
- China
- Prior art keywords
- gas
- metal cover
- proportional counter
- tritium
- metal cap
- 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
Images
Abstract
The utility model discloses a proportional counter for detecting gaseous tritium. The proportional counter comprises a sealed hollow metal cover as a cathode, a core wire as an anode in the metal cover, and a high pressure joint which is fixed on the metal cover and is connected with the core wire. The metal cover is provided with a gas in and out port which is communicated with the internal part of the metal cover. The metal cover of the proportional counter is provided with only one gas in and out port which is communicated with the internal part of the metal cover instead of a gas inlet and a gas outlet of a gas-flow structure, gas goes in and out from the gas in and out port, people only need to control the gas in and out port and can conveniently carry out operations of vacuum pumping, filling operation gas and the like, the high pressure joint is at one end of the metal cover, the gas in and out port is at the other end of the metal cover, and people can conveniently carry out various experiment operations. The proportional counter is especially suitable for activity detection of gaseous tritium, and the controllability is high.
Description
Technical field
The utility model relates to a kind of particle detector, relates in particular to a kind of proportional counter for surveying the gaseous state tritium.
Background technology
Natural tritium is mainly produced by some element interaction in cosmic rays and upper atmosphere, the mankind carry out produce the tritium activity after, the various piths that are discharged into the tritium composing environment tritium source in earth's surface or atmosphere with gas, liquid or solid form.Tritium is as the important radioactive gas nuclide of fission power operation heap discharging, and various nuclear facilities are bled into the tritium of surrounding environment, can cause the rising of ambient atmosphere tritium concentration.And the staff who is operated in nuclear power plant reactor factory building and relevant auxiliary plant will inevitably take in tritium by all means, thereby causes internal radiation hazard to a certain degree.Therefore, how measuring accurately airborne tritium concentration is the key issue that the gaseous state tritium is measured.
At present the method measured of tritium mainly comprises, the one, and after being changed into tritiated water, the tritium Catalytic Oxygen utilize scintillator detector to measure; The 2nd, adopt gas detector such as ionization chamber, proportional counter to carry out the measurement of gas.For the first measuring method, the gaseous state tritium for containing in air converts it into liquid tritium and measures, and has improved on the one hand the difficulty of measuring, and has also reduced on the other hand the degree of accuracy of data.And for the second, guarantee the degree of accuracy measured has certain requirement to gas detector.
The β particle average energy of tritium emission is 5.72KeV, and ceiling capacity is 18.6KeV, and ionization chamber can only be measured the tritium of larger activity, under energy, tritium ionization chamber that concentration is low can't respond, but the employing proportional counter is added to certain value with high pressure, can detect signal.
Proportional counter is a kind ofly to make the work medium with gas, the detector that the pulse height of output signal is directly proportional to the energy of incident radiation, can count single particle, its energy resolution and linear response are better, detection efficiency is high, the life-span is long, is widely used in the fields such as high-energy physics, x ray astronomy.
Find through test of many times, if use air as working gas, the particle that the relative α particle of β particle under high pressure ionizes is many to what will lack, be unfavorable for the measurement of gaseous state tritium, if but air is replaced by P10 gas, the number of ions that the β particle ionization produces doubles because of the amplification of working gas, and this amplification is enough to produce observable electric core pulse.Due to the replacing that relates to working gas in the direct ratio counter, just need to vacuumize the direct ratio counter, and injecting the working gas that needs, present proportional counter is generally flow gas, has a gas access and outlet, this structure is not easy to vacuumize the maintenance with vacuum environment, in addition, due to the singularity of tritium, only need to add high pressure and measure the number of ions that produces, can survey in proportional counter inside, need not to offer the polyester film window for x-ray bombardment.
Summary of the invention
The purpose of this utility model just is that providing a kind of addresses the above problem, and is convenient to people and vacuumizes or inject working gas, the simple in structure and easy to operate proportional counter that is used for surveying the gaseous state tritium.
To achieve these goals, the technical solution adopted in the utility model is such: a kind of proportional counter for surveying the gaseous state tritium, comprise sealed hollow metal cap as negative electrode, metal cap inside as the heart yearn of anode, be fixed on the high pressure connection that is connected with heart yearn on metal cap, only be provided with a gas inlet-outlet with its internal communication on described metal cap.
As preferably: described high pressure connection is positioned at metal cap one end, and described gas inlet-outlet is positioned at the metal cap other end.
Compared with prior art, the utility model has the advantage of: owing to only being provided with a gas inlet-outlet with its internal communication on metal cap, entrance of an outlet of non-flow gas structure, gas all passes in and out from gas inlet-outlet, people only need to control this gas inlet-outlet, just can easily vacuumize, fill the operations such as working gas, high pressure connection is positioned at metal cap one end, described gas inlet-outlet is positioned at the metal cap other end, be convenient to people and carry out various experimental implementation, the utility model especially is fit to the activity of this gas of gaseous state tritium to be surveyed, and controllability is high.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is that the utility model is applied in the structural representation in system;
In figure: 1, metal cap; 2, heart yearn; 3, high pressure connection; 4, gas inlet-outlet; 5, threeway; 6, trunk line; 7, valve; 8, branch pipe(tube).
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Embodiment 1: referring to Fig. 1, a kind of proportional counter for surveying the gaseous state tritium, comprise sealed hollow metal cap 1 as negative electrode, metal cap 1 inside as the heart yearn 2 of anode, be fixed on the high pressure connection 3 that is connected with heart yearn 2 on metal cap 1, only be provided with a gas inlet-outlet 4 with its internal communication on described metal cap 1, described high pressure connection 3 is positioned at metal cap 1 one ends, and described gas inlet-outlet 4 is positioned at metal cap 1 other end.
In addition, in the process of using the proportional counter counting, need not x-ray bombardment due to tritium, therefore, also need not on metal cap 1 incidence window that passes for X ray is set, structure is simpler.
Only being provided with a gas inlet-outlet 4 with its internal communication on metal cap 1 of the present utility model, is mainly to be applied in following this cover gaseous state tritium concentration measurement mechanism, for the measurement of tritium concentration provides environment preferably.
this gaseous state tritium concentration measurement mechanism is referring to Fig. 2, concrete structure is: a kind of gaseous state tritium activity measurement device, comprise probe unit, signal acquiring unit and central processing unit, the pulse signal of the signal formation respective amplitude that described signal acquiring unit detects probe unit, and send in central processing unit and count, analyze and process, also comprise a vacuum unit, described vacuum unit comprises a threeway 5, described threeway 5 one ends connect vacuum meter, two ends connect respectively a trunk line 6 in addition, wherein a trunk line 6 is communicated with probe unit, and this trunk line 6 is provided with valve 7, another trunk line 6 is divided into four branch pipe(tube)s 8 that carry valve 7 away from an end of threeway 5, correspondence is communicated with vacuum air pump one by one respectively, Helium leak detector and two gas bottle, described probe unit comprises one or more proportional counters, the gas inlet-outlet 4 that each proportional counter only has a supplied gas to come in and go out, described gas inlet-outlet 4 is provided with valve 7, and all can be communicated with corresponding trunk line 6 by valve 7 respectively, described valve 7 all is connected with central processing unit, control its folding by central processing unit.
Connect the multiple tracks amplitude pulses analyzer of charge-sensitive preamplifier as preferred described signal acquiring unit for one or more, and when being one the tunnel, the high pressure port of charge-sensitive preamplifier and a proportional counter removably connects, during for multichannel, a plurality of charge-sensitive preamplifiers are corresponding connected one by one with the high pressure port of a plurality of proportional counters, and multiple tracks amplitude pulses analyzer is connected with central processing unit.
The utility model is mainly used in this device, coordinates this device, can effectively survey the activity of gaseous state tritium.
Claims (2)
1. proportional counter of be used for surveying the gaseous state tritium, comprise sealed hollow metal cap as negative electrode, metal cap inside as the heart yearn of anode, be fixed on the high pressure connection that is connected with heart yearn on metal cap, it is characterized in that: only be provided with a gas inlet-outlet with its internal communication on described metal cap.
2. the proportional counter for surveying the gaseous state tritium according to claim 1, it is characterized in that: described high pressure connection is positioned at metal cap one end, and described gas inlet-outlet is positioned at the metal cap other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220497714.4U CN202939314U (en) | 2012-09-26 | 2012-09-26 | Proportional counter for detecting gaseous tritium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220497714.4U CN202939314U (en) | 2012-09-26 | 2012-09-26 | Proportional counter for detecting gaseous tritium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202939314U true CN202939314U (en) | 2013-05-15 |
Family
ID=48323545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220497714.4U Expired - Fee Related CN202939314U (en) | 2012-09-26 | 2012-09-26 | Proportional counter for detecting gaseous tritium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202939314U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308935A (en) * | 2013-05-16 | 2013-09-18 | 中国原子能科学研究院 | Electronics system of portable low-power-consumption tissue-equivalent proportional counter |
| CN108445530A (en) * | 2018-03-26 | 2018-08-24 | 西北核技术研究所 | A kind of α particles isolation-type low-energy electron detecter part |
-
2012
- 2012-09-26 CN CN201220497714.4U patent/CN202939314U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308935A (en) * | 2013-05-16 | 2013-09-18 | 中国原子能科学研究院 | Electronics system of portable low-power-consumption tissue-equivalent proportional counter |
| CN103308935B (en) * | 2013-05-16 | 2015-12-02 | 中国原子能科学研究院 | The electronic system of portable low power-consumption tissue-equivalent proportional counter |
| CN108445530A (en) * | 2018-03-26 | 2018-08-24 | 西北核技术研究所 | A kind of α particles isolation-type low-energy electron detecter part |
| CN108445530B (en) * | 2018-03-26 | 2019-09-27 | 西北核技术研究所 | A kind of α particle isolation-type low-energy electron detecter part |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107257932B (en) | Utilize the ionisation chamber of double probe structures and the alpha particle detection device of difference amplifier | |
| CN104597478B (en) | The method of work of environment gamma spectrum continuous monitor system | |
| CN108152846A (en) | A kind of digitalization radiation inert gas133Xe activity coincidence measurement devices | |
| US20130034198A1 (en) | Noble gas detector for fissile content determination | |
| CN103592670A (en) | Gamma radioactive gas body source absolute detection efficiency calibration device and method | |
| CN109085633A (en) | A kind of high concentration tritium monitor and measurement method | |
| CN105353398A (en) | System and method for on-line measurement of radon and thoron, and daughter concentration therefor | |
| CN103091696A (en) | Gas state tritium activity measuring method | |
| CN202939314U (en) | Proportional counter for detecting gaseous tritium | |
| CN109712727A (en) | A kind of main steam line Radiation monitoring method and device | |
| KR20140043234A (en) | Apparatus and method for measuring efficiency of tritium sample collector | |
| CN109444946A (en) | A kind of intelligence radon thorium analyzer | |
| CN201017035Y (en) | Novel high-sensitivity surroundings neutron detector | |
| CN109493984A (en) | A kind of Nuclear Plant breakage on-line measuring device | |
| CN202975340U (en) | Gaseous tritium activity measuring device | |
| JP3930234B2 (en) | Radon concentration measuring apparatus and method | |
| EP0754305A1 (en) | Apparatus and method for tritium measurement by gas scintillation | |
| CN103033838A (en) | Gaseous tritium activity measuring device | |
| CN109581465A (en) | A kind of tritium gas standard source activity measurement device, methods and applications | |
| CN110954935B (en) | Radon measuring device based on ionization chamber and semiconductor detector | |
| CN209842076U (en) | Measuring device | |
| Backenstoss et al. | An investigation of the stability of nucleons | |
| CN102680998A (en) | Low-activity radon isotope digital coincidence distinguishing measurement method and device | |
| CN109814145B (en) | Low-adsorption large-volume radioactive gas measuring container | |
| CN112331372A (en) | Online measuring device and method for inert gas in nuclear facility gaseous effluent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20130515 Termination date: 20210926 |