CN203787385U - Multilayer high air pressure ionization chamber suitable for detecting high-dose-rate radiation fields - Google Patents
Multilayer high air pressure ionization chamber suitable for detecting high-dose-rate radiation fields Download PDFInfo
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- CN203787385U CN203787385U CN201420074835.7U CN201420074835U CN203787385U CN 203787385 U CN203787385 U CN 203787385U CN 201420074835 U CN201420074835 U CN 201420074835U CN 203787385 U CN203787385 U CN 203787385U
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- 230000005855 radiation Effects 0.000 title claims abstract description 30
- 239000000463 material Substances 0.000 claims description 8
- 238000013016 damping Methods 0.000 claims description 7
- 239000011810 insulating material Substances 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 9
- 150000002500 ions Chemical class 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000000342 Monte Carlo simulation Methods 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
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Abstract
The utility model discloses a multilayer high air pressure ionization chamber suitable for detecting high-dose-rate radiation fields. The multilayer high air pressure ionization chamber comprises an ionization chamber housing, and an internal assembly is arranged in the ionization chamber housing; the internal assembly comprises a plurality of high voltage polar plates and collecting polar plates, the high voltage polar plates and collecting polar plates are arranged in an alternate ranking manner, the high voltage polar plates are fixed and electrically connected to a first electrode through a first set of pole columns, the collecting polar plates are fixed and electrically connected to a second electrode through a second set of pole columns, and the high voltage polar plates are insulated from the collecting polar plates. Compared with the prior art, the multilayer high air pressure ionization chamber can measure the dose rate of a photon radiation field in an energy scope from 80keV to 8MeV and in a dose rate scope from the background to 436mGy/h, and the dose rate measurement scope is greatly increased.
Description
Technical field
The utility model relates to a kind of high-pressure ionization chamber that is applicable to measure high dose rate pulse photon radiation field, for measuring energy range 80keV～8MeV specifically, the gamma radiation field of dose rate scope from environmental exact details to 436mGy/h, and a kind of multi-layer plane ionization chamber of design.
Background technology
Ionization chamber is a kind of for measuring the detector of nuclear radiation, can be used for the dosage size of measuring radiation.Gamma-rays produces secondary electron in ionization chamber gas, and secondary electron makes gas atom ionization on its motion track, produces a series of negative ions pair.The right number of negative ions is relevant with the energy that particle deposits in ionization chamber indoor gas, and it is relevant with the character of institute inflatable body to produce the required average energy of a pair of ion.Under electric field in sensitive volume, electronics, cation to the two poles of the earth drift, cause that the charge inducing amount of respective electrode plate changes, thereby form electric current in external circuitses respectively, by the measurement to size of current, release the size of radiation value.
Because complicated interaction occurs for charged particle and the material of various energy, the photon radiation energy range that accelerator produces is wider, and dose rate is larger.For the size of accurate evaluation radiation from machine field, must select suitable detector and suitable method to monitor this.
In the prior art, for monitoring the gas filled ionization chamber of photon radiation, mainly contain two kinds of cylindricality and ball-types.Both generally all adopt shell is high-pressure stage, the structure that center material is collector, and due to structure, the negative ions that ionisation effect produces cannot arrive corresponding battery lead plate fast, can not be for measuring photon radiation field, high dose rate He Kuanneng district.
Utility model content
For the technical problem existing in prior art, for measure between higher, the wide energy range of dose rate the accurate dose value of gamma Rays field, the purpose of this utility model is to provide a kind of multilayer high-pressure ionization chamber that is applicable to survey high dose rate radiation field, by reducing negative ions to being achieved the drift time between two-plate.
For achieving the above object, the technical scheme that the utility model adopts is:
A multilayer high-pressure ionization chamber that is applicable to survey high dose rate radiation field, is characterized in that comprising ionization chamber shell, and its inside is provided with an intraware; Described intraware comprises spaced a plurality of high-pressure polar plate, collecting plate, and the first electrode is fixed and be electrically connected to described high-pressure polar plate by first group of pole; The second electrode is fixed and be electrically connected to described collecting plate by second group of pole; Between described high-pressure polar plate and described collecting plate, insulate.
Further, outside, described high-pressure polar plate edge is provided with a plurality of apertures that mate with first group of pole; Described first group of pole is fixed by the aperture on described high-pressure polar plate and is electrically connected to the first electrode; Outside, described collecting plate edge is provided with a plurality of apertures that mate with second group of pole; Described second group of pole is fixed by the aperture on described collecting plate and is electrically connected to the second electrode.
Further, described high-pressure polar plate and described collecting plate are circle and the coaxial spaced arrangement of equal size; Described first group of pole and described second group of pole are equally spaced spaced apart in described high-pressure polar plate or outside, collecting plate edge.
Further, between described high-pressure polar plate and described collecting plate, be spaced apart 2.0mm, the superiors and orlop are described high-pressure polar plate.
Further, described high-pressure polar plate, collecting plate are the aluminium sheet of thickness 1.0mm; Pole in described first group of pole, second group of pole is the stainless steel material of 1Cr18Ni8Ti type.
Further, described ionization chamber shell outside is provided with a containment vessel; Between described ionization chamber shell and described containment vessel, be filled with damping insulating material.
Further, described damping insulating material is polyurethane.
This ionization chamber comprise intraware, in fill hyperbar gas, ionization chamber shell, damping insulating material and containment vessel, described intraware comprises high-pressure polar plate, collecting plate, at high-pressure polar plate and collecting plate upper edge, four apertures are evenly set, by four poles (totally eight), fix high-pressure polar plate and collecting plate respectively; Described high-pressure polar plate and collecting plate are spaced, and 45 degree that mutually stagger in the projection of pad-face; Described eight poles are respectively through four apertures of high-pressure polar plate and collecting plate, and pole plate center is initial point, and the line of adjacent pole and initial point is just in time 45 degree.
High-purity aluminium sheet that high-pressure polar plate thickness in described ionization chamber is 1.0mm, effective diameter 170mm, the number of plies is 66.
High-purity aluminium sheet that collecting plate thickness in described ionization chamber is 1.0mm, effective diameter 170mm, the number of plies is 65.
Set four apertures on described high-pressure polar plate and collecting plate, little pore radius is 2.5mm.
Described eight poles, radius is the stainless steel material of the 1Cr18Ni8Ti type of 2.5mm.
Described ionization chamber shell is Φ 219*517mm cylindrical outer cover, and material is the stainless steel of 1Cr18Ni8Ti type.
Described hyperbar gas is argon gas, inside fills in ionization chamber shell, and air pressure is 2.5MPa.
Described damping insulating material is between ionization chamber shell and containment vessel, and material is polyurethane.
Described containment vessel is Φ 260*524mm cylindrical outer cover, and material is common stainless steel.
The utility model is with respect to prior art, and its advantage is as follows:
Between the high-pressure polar plate of this ionization chamber and collecting plate, field intensity is larger, and negative ions can fast moving, and signal can Quick-forming, has reduced the compound of negative ions simultaneously, when a large amount of photon incident, still can keep such state.Because while measuring radiation from machine field, radiation is pulsed, the radiation dose rate of pulse moment is far longer than its mean dose rate, and it is quite important that compound modifying factor becomes.Therefore can measure energy range is 80keV～8MeV, and dose rate scope is that background is big or small to the dose rate of the photon radiation field of 436mGy/h, has greatly improved dose rate measuring range.
Accompanying drawing explanation
The integral body of Tu1Wei multilayer high-pressure ionization chamber and electrode plate structure schematic diagram;
Fig. 1 (a) is ionization chamber structure chart, and Fig. 1 (b) is the structure chart of high-pressure polar plate, collecting plate;
The internal structure schematic diagram of Tu2Wei multilayer high-pressure ionization chamber;
The sectional view that Fig. 2 (a) is intraware, the top view that Fig. 2 (b) is intraware;
The energy response analog result of Tu3Wei multilayer high-pressure ionization chamber and the comparison of experimental measurements;
The Linear Experiment measurement result of Tu4Wei multilayer high-pressure ionization chamber.
Embodiment
Referring to Fig. 1, multilayer high-pressure ionization chamber is applying argon gas in this high pressure shell, and dash area is a plurality of pole plates and pole.Smallclothes are the schematic diagram of pole plate, and center is circular entity, are with four apertures outward.
Referring to Fig. 2, multilayer high-pressure ionization chamber comprise intraware, in fill hyperbar gas, ionization chamber shell, damping insulating material and containment vessel.Interval 2.0mm between the battery lead plate of ionization chamber, the superiors and orlop are high-pressure polar plate, and high-pressure polar plate and collecting plate are spaced, and the pole that four diameters are 5.0mm, respectively through high-pressure polar plate and collecting plate, forms ionization chamber intraware.Because high-pressure stage pole plate and collector polar plate interval are arranged, be made as pole plate and pole plate; Pole has 8, is made as 1,2,3,4,5,6,7,8; Visible high-pressure polar plate is all enclosed within on 1,3,5,7 pole, and collecting plate is all enclosed within on 2,4,6,8 pole.1,3,5,7 four poles are connected on an electrode by lead-in wire, form the signal of telecommunication; 2,4,6,8 four poles are connected on another electrode by lead-in wire, form the signal of telecommunication; Between two electrodes, form loop output current signal.
Referring to Fig. 3, the energy response curve of ionization chamber.The definition that can ring is: in the photon radiation field of certain energy, and the ratio between the measured value of the amount of radiation that detector records and this amount of radiation true value.When measured value can truly reflect amount of radiation true value, at any energy point ratio, be at 1 o'clock, ionization chamber is in the best state.What Fig. 3 described is the contrast of the obtained energy response curve of experiment and Monte Carlo simulation: as can be seen here, between active 50keV～1250keV, the analogue value and experiment value meet better.From analog result, can also draw at 80keV～8MeV, energy response is comparatively smooth.
Referring to Fig. 4, the dosage linearity curve of ionization chamber.Reflect that the dose rate that ionization chamber can measure, if ratio is 1, illustrates functional along with dose rate changes.Can find out that linearity is very good between 78 μ Gy/h～37.7mGy/h, when being greater than 37.7mGy/h, there is no the source that dose rate is suitable, so until 662mGy/h, become large 50%; By approximate estimation, can think that, when dosage is 436mGy/h, linearity is still good.
For ionization chamber model, utilize Monte-Carlo particle to transport program and carry out analog computation.When the structure of ionization chamber being described by MCNP program, use real geometrical model, during for saving machine, few employing " remaining " computing as far as possible.When the similar lattice cell of definition, adopt LIKE BUT TRCL, greatly reduced the line number of program description language, reduced the possibility making a mistake.Adopt the sensitive volume counting of F6 (average deposition energy) card to whole ionization chamber, because this ionization chamber structure is more complicated, MCNP is volume calculated or area automatically, produce fatal error, need to utilize SD (fragmentation count card) to provide the quality of each section of lattice cell to count for F6 type.According to different-energy photon, for the population of analog computation, be more than or equal to 106, the statistical error of result is all less than 0.6%.
Claims (7)
1. a multilayer high-pressure ionization chamber that is applicable to survey high dose rate radiation field, is characterized in that comprising ionization chamber shell, and its inside is provided with an intraware; Described intraware comprises spaced a plurality of high-pressure polar plate, collecting plate, and the first electrode is fixed and be electrically connected to described high-pressure polar plate by first group of pole; The second electrode is fixed and be electrically connected to described collecting plate by second group of pole; Between described high-pressure polar plate and described collecting plate, insulate.
2. the multilayer high-pressure ionization chamber that is applicable to survey high dose rate radiation field as claimed in claim 1, is characterized in that outside, described high-pressure polar plate edge is provided with a plurality of apertures that mate with first group of pole; Described first group of pole is fixed by the aperture on described high-pressure polar plate and is electrically connected to the first electrode; Outside, described collecting plate edge is provided with a plurality of apertures that mate with second group of pole; Described second group of pole is fixed by the aperture on described collecting plate and is electrically connected to the second electrode.
3. the multilayer high-pressure ionization chamber that is applicable to survey high dose rate radiation field as claimed in claim 2, is characterized in that circle and coaxial spaced arrangement that described high-pressure polar plate and described collecting plate are equal size; Described first group of pole and described second group of pole are equally spaced spaced apart in described high-pressure polar plate or outside, collecting plate edge.
4. the multilayer high-pressure ionization chamber that is applicable to survey high dose rate radiation field as described in claim 1 or 2 or 3, is characterized in that the 2.0mm that is spaced apart between described high-pressure polar plate and described collecting plate, and the superiors and orlop are described high-pressure polar plate.
5. the multilayer high-pressure ionization chamber that is applicable to survey high dose rate radiation field as claimed in claim 4, is characterized in that described high-pressure polar plate, collecting plate are the aluminium sheet of thickness 1.0mm; Pole in described first group of pole, second group of pole is the stainless steel material of 1Cr18Ni8Ti type.
6. the multilayer high-pressure ionization chamber that is applicable to survey high dose rate radiation field as claimed in claim 4, is characterized in that described ionization chamber shell outside is provided with a containment vessel; Between described ionization chamber shell and described containment vessel, be filled with damping insulating material.
7. the multilayer high-pressure ionization chamber that is applicable to survey high dose rate radiation field as claimed in claim 6, is characterized in that described damping insulating material is polyurethane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420074835.7U CN203787385U (en) | 2014-02-20 | 2014-02-20 | Multilayer high air pressure ionization chamber suitable for detecting high-dose-rate radiation fields |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420074835.7U CN203787385U (en) | 2014-02-20 | 2014-02-20 | Multilayer high air pressure ionization chamber suitable for detecting high-dose-rate radiation fields |
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| CN203787385U true CN203787385U (en) | 2014-08-20 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108257695A (en) * | 2017-12-13 | 2018-07-06 | 中国船舶重工集团公司第七〇九研究所 | Axial quantity of power journey measuring device outside a kind of marine minitype reactor |
| CN110031883A (en) * | 2019-03-05 | 2019-07-19 | 中国辐射防护研究院 | One kind being based on wireless condenser type high ionization dose of radiation sensor |
| CN110764129A (en) * | 2019-11-15 | 2020-02-07 | 中国科学院合肥物质科学研究院 | Multi-channel low-pressure ionization chamber gas detector |
| CN111103618A (en) * | 2019-12-26 | 2020-05-05 | 中核控制***工程有限公司 | Ionization chamber working under high temperature condition |
-
2014
- 2014-02-20 CN CN201420074835.7U patent/CN203787385U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108257695A (en) * | 2017-12-13 | 2018-07-06 | 中国船舶重工集团公司第七〇九研究所 | Axial quantity of power journey measuring device outside a kind of marine minitype reactor |
| CN108257695B (en) * | 2017-12-13 | 2024-03-26 | 中国船舶重工集团公司第七一九研究所 | Marine small-sized reactor outer axial power range measuring device |
| CN110031883A (en) * | 2019-03-05 | 2019-07-19 | 中国辐射防护研究院 | One kind being based on wireless condenser type high ionization dose of radiation sensor |
| CN110031883B (en) * | 2019-03-05 | 2022-06-07 | 中国辐射防护研究院 | High ionizing radiation dose sensor based on wireless capacitance |
| CN110764129A (en) * | 2019-11-15 | 2020-02-07 | 中国科学院合肥物质科学研究院 | Multi-channel low-pressure ionization chamber gas detector |
| CN111103618A (en) * | 2019-12-26 | 2020-05-05 | 中核控制***工程有限公司 | Ionization chamber working under high temperature condition |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 Termination date: 20190220 |
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| CF01 | Termination of patent right due to non-payment of annual fee |