CN101236254B - For measuring neutron fluence rate in the 20MeV energy region238U fission ionization chamber - Google Patents
For measuring neutron fluence rate in the 20MeV energy region238U fission ionization chamber Download PDFInfo
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- CN101236254B CN101236254B CN2008100080513A CN200810008051A CN101236254B CN 101236254 B CN101236254 B CN 101236254B CN 2008100080513 A CN2008100080513 A CN 2008100080513A CN 200810008051 A CN200810008051 A CN 200810008051A CN 101236254 B CN101236254 B CN 101236254B
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- Prior art keywords
- collector
- end liner
- shell
- 20mev
- fluence rate
- Prior art date
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- 230000004992 fission Effects 0.000 title claims abstract description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 8
- 239000010935 stainless steel Substances 0.000 claims abstract description 8
- 239000004809 Teflon Substances 0.000 claims description 10
- 229920006362 Teflon® Polymers 0.000 claims description 10
- 229910001369 Brass Inorganic materials 0.000 claims description 6
- 239000010951 brass Substances 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Abstract
The invention discloses a method for measuring the neutron fluence rate in a 20MeV energy zone238The U fission ionization chamber is columnar and comprises a shell (1) with an air inlet (2) and an air outlet (3) and is electroplated with238U end liner (5), collector (6) of sample (8), end liner (5) and collector (6) are fixed in shell (1) through pillar (7), and end liner (5) are connected with shell (1) and are regarded as the negative pole, and collector (6) are regarded as the positive pole, and the signal that collector (6) were collected is carried through signal output plug (9), end liner (5) be stainless steel material. The invention provides a device for measuring the neutron fluence rate in the 20MeV energy region, which has simple structure and low cost and can be conveniently adjusted according to the measurement requirement238The U fission ionizers.
Description
Technical field
The present invention relates to the ionisation-chamber arrangements that a kind of radiant intensity measurement is used, particularly a kind ofly be used to measure 20MeV and can distinguish neutron fluence rate
238The U fission chamber.
Background technology
Neutron fluence rate is one of fundamental quantity of neutron field, and other parameter of acquisition that can prepare from it is as response of neutron cross section, detector etc.What the employing of measurement fast neutron fluence rate was maximum is the hydrogen recoil method, according to the difference that can distinguish, selects multi-form proton-recoil detector.At present, can distinguish neutron fluence rate more than the measurement 20MeV, the measurement mechanism that generally adopts has proton-recoil telescope and fission chamber in the world.For proton-recoil telescope, its uncertainty of measurement is little, but because it to the gamma-rays sensitivity, need do coincidence measurement, thereby measurement mechanism is comparatively complicated, support equipment is more, and its efficient is lower.Compare with it,
238The U fission chamber, measurement mechanism is simple, reliable working performance, and insensitive to gamma-rays and low energy neutron.In the world
238The U fission chamber generally adopts platinum as end liner, and it involves great expense.
Summary of the invention
The present invention has overcome deficiency of the prior art, provide a kind of simple in structure, with low cost, can measure 20MeV according to the needs of measuring being used to of mediating easily and can distinguish neutron fluence rate
238The U fission chamber.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
This device is column, comprises the shell that has air intake opening and gas outlet, is electroplate with
238The end liner of U sample, collector, end liner and collector are fixing in the enclosure by pillar, and key is that described end liner is a stainless steel.
The stability of adjusting collector for convenience and the die opening between the end liner and raising end liner and collector reaches, and the present invention is all right:
Described pillar is assembled by the teflon sleeve and the brass sleeve pipe of teflon rod and different length, and described end liner and collector are also fixed by set collar.
Compared with prior art, the invention has the beneficial effects as follows: this device adopts stainless steel material as end liner, reduce the cost of this device greatly, and adopt the teflon sleeve and the brass sleeve pipe of teflon rod and different length to be assembled into pillar, adopt teflon sleeve or brass sleeve pipe that collector and casing insulation are set, end liner is communicated with as negative electrode with shell, and can be according to the needs of measuring, and reconciles die opening between collector and the end liner by the sleeve pipe of different length.
Description of drawings
Fig. 1
238U fission chamber structure cut-open view
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
This device is column structure; Comprise that by interior diameter be 170mm; The front and back wall thickness is the shell 1 of 1.1mm; Be welded with air inlet 2 and gas outlet 3 on the shell 1; Diameter is 150mm; Thickness is that stainless steel end liner 5 and the diameter of 0.4mm is 150mm; Thickness is that the collector 6 of 0.3mm is fixed on shell 1 inside by stainless steel retainer ring 4 and the pillar 7 that is made up of teflon rod and sleeve pipe; Its stainless steel end liner 5 is communicated with as negative electrode by the brass sleeve pipe with shell 1; Collector 6 insulate by teflon sleeve and shell 1 with shell 1 and as anode238U sample 8 is electroplated on end liner 5, and the signal that collector 6 is collected is carried signal by signal output plug 9.
The principle of work of this ionization chamber is as follows:
At first working gas is charged in the ionization chamber by air intake opening 2 and gas outlet 3, then ionization chamber is inserted in the neutron field, the neutron in the neutron field makes plating on end liner 5
238U sample 8 is fissioned, fission fragment makes working gas ionization, forms positive ion and negative ion, collects under the electric field action between collector 6 and the end liner 5, produce electric signal in the collection process, the electric signal that collector 6 is collected is delivered to electronic system by signal output plug 9 again.
Claims (1)
1. one kind is used to measure 20MeV and can distinguishes neutron fluence rate
238The U fission chamber, this ionization chamber is column, comprises the shell (1) that is welded with air intake opening (2) and gas outlet (3), collector (6) and being electroplate with
238The end liner (5) of U sample (8); End liner (5) and collector (6) are fixed in the shell (1) by stainless steel set collar (4) and pillar (7), end liner (5) be connected by the brass sleeve pipe with shell (1) and end liner (5) as negative electrode, collector (6) and shell (1) by teflon sleeve insulation and collector (6) as anode, the signal that collector (6) is collected is carried by signal output plug (9), described end liner (5) is a stainless steel, it is characterized in that described pillar (7) is formed by teflon rod, teflon sleeve and brass sleeve pipe mutual group dress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100080513A CN101236254B (en) | 2008-03-05 | 2008-03-05 | For measuring neutron fluence rate in the 20MeV energy region238U fission ionization chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100080513A CN101236254B (en) | 2008-03-05 | 2008-03-05 | For measuring neutron fluence rate in the 20MeV energy region238U fission ionization chamber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101236254A CN101236254A (en) | 2008-08-06 |
| CN101236254B true CN101236254B (en) | 2010-08-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100080513A Active CN101236254B (en) | 2008-03-05 | 2008-03-05 | For measuring neutron fluence rate in the 20MeV energy region238U fission ionization chamber |
Country Status (1)
| Country | Link |
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| CN (1) | CN101236254B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2743849C1 (en) * | 2020-04-23 | 2021-02-26 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") | Ionisation fission chamber for detecting fast neutrons |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105629286B (en) * | 2016-01-28 | 2018-11-09 | 中国计量科学研究院 | A kind of ionisation chamber measuring Neutron Ambient Dose Equivalent |
| CN107884808A (en) * | 2017-10-19 | 2018-04-06 | 兰州大学 | A kind of measuring method of high flux deuterium tritium accelerator for neutron production neutron yield |
| CN112114350A (en) * | 2020-09-04 | 2020-12-22 | 南华大学 | Micromegas-based fission chamber |
| CN113640853A (en) * | 2021-07-16 | 2021-11-12 | 中国原子能科学研究院 | Target structure for measuring high-fluence thermal neutron fission ionization chamber |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5098639A (en) * | 1990-06-05 | 1992-03-24 | Commissariat L'energie Atomique | Fission chamber with a wide measuring range and apparatus for measuring the neutron flux density using said fission chamber |
| CN2249449Y (en) * | 1996-01-17 | 1997-03-12 | 中国科学院新疆物理研究所 | Window-adjustable double-wall ionization chamber |
-
2008
- 2008-03-05 CN CN2008100080513A patent/CN101236254B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5098639A (en) * | 1990-06-05 | 1992-03-24 | Commissariat L'energie Atomique | Fission chamber with a wide measuring range and apparatus for measuring the neutron flux density using said fission chamber |
| CN2249449Y (en) * | 1996-01-17 | 1997-03-12 | 中国科学院新疆物理研究所 | Window-adjustable double-wall ionization chamber |
Non-Patent Citations (1)
| Title |
|---|
| 陈泽民等.用聚乙烯薄膜测中子绝对注量率.核电子学与探测技术19 4.1999,19(4),248-251. * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2743849C1 (en) * | 2020-04-23 | 2021-02-26 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") | Ionisation fission chamber for detecting fast neutrons |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101236254A (en) | 2008-08-06 |
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