CN115356546A - Wide-range composite ionization chamber and measuring method thereof - Google Patents
Wide-range composite ionization chamber and measuring method thereof Download PDFInfo
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- CN115356546A CN115356546A CN202210969507.2A CN202210969507A CN115356546A CN 115356546 A CN115356546 A CN 115356546A CN 202210969507 A CN202210969507 A CN 202210969507A CN 115356546 A CN115356546 A CN 115356546A
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- 239000002131 composite material Substances 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000012212 insulator Substances 0.000 claims description 7
- 238000000691 measurement method Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 11
- 230000005865 ionizing radiation Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
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Abstract
The invention discloses a wide-range composite ionization chamber and a measuring method thereof, wherein the wide-range composite ionization chamber comprises an outer high-voltage electrode, a second collector, an inner high-voltage electrode and a first collector which are coaxially sleeved from outside to inside in sequence; the inner high-voltage electrode is coaxially arranged inside the outer high-voltage electrode and integrally connected with the outer high-voltage electrode, the first collector is coaxially arranged inside the inner high-voltage electrode, and the second collector is coaxially arranged outside the inner high-voltage electrode; and the low-dose ionization signals are collected through the matching of the outer high-voltage electrode and the second collector, and the high-dose ionization signals are collected through the matching of the inner high-voltage electrode and the first collector. The invention solves the problem of smaller measurement range of the existing ionization chamber.
Description
Technical Field
The invention belongs to the technical field of ionization chambers, and particularly relates to a wide-range composite ionization chamber and a measuring method thereof.
Background
An ionization chamber is a detector that measures ionizing radiation using the ionizing effect of the ionizing radiation, and consists of electrodes at different potentials and a medium therebetween. Ionizing radiation generates ionizing ion pairs in the medium, and under the action of an electric field, positive and negative ions drift to the negative electrode and the positive electrode respectively to form ionizing current. Since the ionization current is proportional to the intensity of the radiation, measuring this current yields the intensity of the ionizing radiation. A single collector is arranged in a conventional ionization chamber, the measurement range of the ionization chamber is small, and if the lower measurement limit is ensured, the upper limit cannot be ensured, and vice versa.
Disclosure of Invention
The invention aims to provide a wide-range composite ionization chamber and a measuring method thereof, and aims to solve the problem that the existing ionization chamber is small in measuring range.
The first technical scheme adopted by the invention is as follows: a measuring method of a wide-range composite ionization chamber comprises an outer high-voltage electrode, a second collector, an inner high-voltage electrode and a first collector which are coaxially sleeved from outside to inside in sequence; the inner high-voltage electrode is coaxially arranged inside the outer high-voltage electrode and integrally connected with the outer high-voltage electrode, the first collector is coaxially arranged inside the inner high-voltage electrode, and the second collector is coaxially arranged outside the inner high-voltage electrode;
and the low-dose ionization signals are collected through the matching of the outer high-voltage electrode and the second collector, and the high-dose ionization signals are collected through the matching of the inner high-voltage electrode and the first collector.
The invention adopts a second technical scheme that: a wide-range composite ionization chamber comprises a first collector, wherein the first collector is a slender rod, an inner high-voltage electrode is coaxially sleeved outside the first collector, the inner high-voltage electrode is a hollow cylinder, and the bottom end of the first collector is positioned in the inner high-voltage electrode and is not in contact with the bottom end of the inner high-voltage electrode;
the second collector and the outer high-voltage electrode are sequentially coaxially sleeved outside the inner high-voltage electrode, the second collector comprises a cylinder and at least three output shafts arranged at the top end of the cylinder, and the output shafts are arranged in a circular array with the first collector as the center of a circle;
the outer high-voltage electrode is a hollow cylinder, the top end of the first collector penetrates out of the top end of the outer high-voltage electrode, the top end of the inner high-voltage electrode is connected with the top end of the outer high-voltage electrode, the top end of the cylinder is not in contact with the top end of the outer high-voltage electrode, and each output shaft penetrates out of the top end of the outer high-voltage electrode;
the bottom of the inner high-voltage pole is positioned in the cylinder body and is not contacted with the bottom of the cylinder body, and the bottom of the cylinder body is positioned in the outer high-voltage pole and is not contacted with the bottom of the outer high-voltage pole.
Furthermore, insulators are sleeved outside the output shafts and at the intersection of the output shafts and the outer high-voltage electrode, and insulators are arranged outside the first collector and at the intersection of the first collector and the outer high-voltage electrode.
Further, each output shaft converges to a total output shaft.
The beneficial effects of the invention are: two collectors are coaxially arranged in the ionization chamber, an inner high-voltage electrode is additionally arranged in the outer high-voltage electrode, and ionization signals with high and low doses can be collected simultaneously. The ionization chamber can be used for wide-range measurement compared with the ionization chamber only provided with one collector under the condition that the internal gas volume of the ionization chamber is the same, namely, the measurement of high range and low range can be completed by using one detector, the measurement range is improved, the measurement capacity of high range and low range is realized, and the upper limit and the lower limit can be ensured simultaneously.
Drawings
FIG. 1 is a schematic top view of a wide-range composite ionization chamber according to the present invention;
FIG. 2 isbase:Sub>A schematic sectional view A-A of FIG. 1.
The high-voltage power supply comprises an outer high-voltage electrode 1, a second collector 2, a cylinder 21, an output shaft 22, an inner high-voltage electrode 3, a first collector 4 and an insulator 5.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention provides a measuring method of a wide-range composite ionization chamber, which comprises an outer high-voltage electrode 1, a second collector 2, an inner high-voltage electrode 3 and a first collector 4 which are coaxially sleeved from outside to inside in sequence; the inner high-voltage electrode 3 is coaxially arranged inside the outer high-voltage electrode 1 and integrally connected with the outer high-voltage electrode, the first collector 4 is coaxially arranged inside the inner high-voltage electrode 3, and the second collector 2 is coaxially arranged outside the inner high-voltage electrode 3; the low-dose ionization signal is collected through the matching of the outer high-voltage electrode 1 and the second collector 2, and the high-dose ionization signal is collected through the matching of the inner high-voltage electrode 3 and the first collector 4.
An inner high-voltage pole 3 integrally connected with the outer high-voltage pole 1 is coaxially arranged in the outer high-voltage pole 1, a first collector 4 is coaxially arranged in the inner high-voltage pole 3, and a second collector 2 is coaxially arranged outside the inner high-voltage pole 3. The low-dose ionization signals are collected through the matching of the outer high-voltage electrode 1 and the second collector 2, and the high-dose ionization signals are collected through the matching of the inner high-voltage electrode 3 and the first collector 4. And finally, outputting weak current by the ionization signal through the corresponding collector, and carrying out subsequent electronic processing.
The invention also provides a wide-range composite ionization chamber, which comprises a first collector 4, wherein the first collector 4 is a slender rod, an inner high-voltage electrode 3 is coaxially sleeved outside the first collector 4, the inner high-voltage electrode 3 is a hollow cylinder, and the bottom end of the first collector 4 is positioned in the inner high-voltage electrode 3 and is not contacted with the bottom end of the inner high-voltage electrode 3;
a second collector 2 and an outer high-voltage electrode 1 are sequentially coaxially sleeved outside the inner high-voltage electrode 3, the second collector 2 comprises a cylinder 21 and three output shafts 22 arranged at the top end of the cylinder 21, and the three output shafts 22 are arranged in a circular array with the first collector 4 as the center of circle;
the outer high-voltage electrode 1 is a hollow cylinder, the top end of the first collector 4 penetrates out from the top end of the outer high-voltage electrode 1, the top end of the inner high-voltage electrode 3 is connected with the top end of the outer high-voltage electrode 1, the top end of the cylinder 21 is not in contact with the top end of the outer high-voltage electrode 1, and the output shafts 22 penetrate out from the top end of the outer high-voltage electrode 1.
The bottom end of the inner high voltage pole 3 is positioned in the cylinder body 21 and is not contacted with the bottom end of the cylinder body 21, and the bottom end of the cylinder body 21 is positioned in the outer high voltage pole 1 and is not contacted with the bottom end of the outer high voltage pole 1.
The second collector 2 is used for collecting ionization signals formed in the space inside the outer high-voltage electrode 1 and outside the inner high-voltage electrode 3 and outputting the ionization signals through an output shaft 22; the first collector 4 is used for collecting the ionization signal formed in the inner space of the inner high voltage electrode 3 and outputting the ionization signal through the first collector 4. The outer high-voltage electrode 1 and the inner high-voltage electrode 3 form inner and outer high-voltage electrodes on two sides of the second collector 2, so that the sensitive volume of the ionization chamber device is increased, the lower limit of measurement can be guaranteed, and the sensitivity is improved.
In some embodiments, an insulator 5 is sleeved outside each output shaft 22 and at the intersection with the outer high voltage pole 1, and the insulator 5 is arranged outside the first collector 4 and at the intersection with the outer high voltage pole 1. The cylinder 21 is supported by at least three output shafts 22, the output shafts 22 are arranged according to a circular array with the first collector 4 as the center of a circle, the output shafts 22 are symmetrically arranged, and the straight rod structure of the first collector 4 is arranged, so that the stability of the whole structure is enhanced, the vibration resistance of the whole ionization chamber is enhanced, the stability of the ionization chamber detector is effectively improved, and the probability of false alarm and large number of emission is reduced.
In some embodiments, each output shaft 22 is connected to a common output shaft and outputs an ionization signal.
In the existing gas detection work, a high-range detector and a low-range detector are usually used for measuring a high range and a low range respectively, but the invention can realize that the high-range and the low-range measurement can be simultaneously finished by using one detector by additionally arranging an inner high-voltage electrode 3 in an outer high-voltage electrode 1 and respectively matching and arranging a collector in the two high-voltage electrodes. Namely, under the condition that the volumes of the gases in the ionization chamber are the same, compared with the ionization chamber structure provided with only one collector, the ionization chamber structure disclosed by the invention can realize wide-range measurement, improves the measurement range and can simultaneously ensure the upper limit and the lower limit.
Claims (4)
1. The measuring method of the wide-range composite ionization chamber is characterized in that the wide-range composite ionization chamber comprises an outer high-voltage electrode (1), a second collector (2), an inner high-voltage electrode (3) and a first collector (4) which are coaxially sleeved from outside to inside in sequence; the high-voltage power supply comprises an outer high-voltage electrode (1), an inner high-voltage electrode (3) integrally connected with the outer high-voltage electrode, a first collector (4) coaxially arranged in the inner high-voltage electrode (3), and a second collector (2) coaxially arranged on the outer side of the inner high-voltage electrode (3);
the outer high-voltage electrode (1) and the second collector (2) are matched to collect low-dose ionization signals, and the inner high-voltage electrode (3) and the first collector (4) are matched to collect high-dose ionization signals.
2. A wide-range composite ionization chamber is characterized in that the measurement method of the wide-range composite ionization chamber based on claim 1 specifically comprises the following steps:
the collector comprises a first collector (4), wherein the first collector (4) is a slender rod, an inner high-voltage electrode (3) is coaxially sleeved outside the first collector (4), the inner high-voltage electrode (3) is a hollow cylinder, and the bottom end of the first collector (4) is positioned in the inner high-voltage electrode (3) and is not in contact with the bottom end of the inner high-voltage electrode (3);
a second collector (2) and an outer high-voltage electrode (1) are sequentially coaxially sleeved outside the inner high-voltage electrode (3), the second collector (2) comprises a cylinder (21) and at least three output shafts (22) arranged at the top end of the cylinder (21), and the output shafts (22) are arranged in a circular array with the first collector (4) as the center of a circle;
the outer high-voltage electrode (1) is a hollow cylinder, the top end of the first collector (4) penetrates out of the top end of the outer high-voltage electrode (1), the top end of the inner high-voltage electrode (3) is connected with the top end of the outer high-voltage electrode (1), the top end of the cylinder (21) is not in contact with the top end of the outer high-voltage electrode (1), and the output shafts (22) penetrate out of the top end of the outer high-voltage electrode (1);
the bottom of interior high-voltage pole (3) is located in barrel (21), and its with the bottom of barrel (21) is contactless, the bottom of barrel (21) is located in outer high-voltage pole (1), and its with the bottom of outer high-voltage pole (1) is contactless.
3. The wide-range composite ionization chamber as claimed in claim 2, wherein an insulator (5) is sleeved outside each output shaft (22) and at the intersection with the outer high-voltage electrode (1), and the insulator (5) is arranged outside the first collector (4) and at the intersection with the outer high-voltage electrode (1).
4. A wide-range composite ionization chamber according to claim 2 wherein each of said output shafts (22) converge to a common output shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210969507.2A CN115356546A (en) | 2022-08-12 | 2022-08-12 | Wide-range composite ionization chamber and measuring method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210969507.2A CN115356546A (en) | 2022-08-12 | 2022-08-12 | Wide-range composite ionization chamber and measuring method thereof |
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| CN115356546A true CN115356546A (en) | 2022-11-18 |
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| CN202210969507.2A Pending CN115356546A (en) | 2022-08-12 | 2022-08-12 | Wide-range composite ionization chamber and measuring method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2684210Y (en) * | 2004-02-06 | 2005-03-09 | 北京清大科技股份有限公司 | High stabilizing end face ionization chamber |
| JP2011080862A (en) * | 2009-10-07 | 2011-04-21 | Mitsubishi Electric Corp | Radiation monitor |
| CN202339411U (en) * | 2011-10-17 | 2012-07-18 | 中国辐射防护研究院 | Source-embedded resistance-to-radiation ionization chamber |
| CN110148550A (en) * | 2019-06-17 | 2019-08-20 | 陕西卫峰核电子有限公司 | High range area radiation monitor ionization chamber after a kind of accident |
| CN209373134U (en) * | 2018-12-28 | 2019-09-10 | 西安中核核仪器有限公司 | Integrate the γ radiation chamber detection device of low energy type and high energy type |
-
2022
- 2022-08-12 CN CN202210969507.2A patent/CN115356546A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2684210Y (en) * | 2004-02-06 | 2005-03-09 | 北京清大科技股份有限公司 | High stabilizing end face ionization chamber |
| JP2011080862A (en) * | 2009-10-07 | 2011-04-21 | Mitsubishi Electric Corp | Radiation monitor |
| CN202339411U (en) * | 2011-10-17 | 2012-07-18 | 中国辐射防护研究院 | Source-embedded resistance-to-radiation ionization chamber |
| CN209373134U (en) * | 2018-12-28 | 2019-09-10 | 西安中核核仪器有限公司 | Integrate the γ radiation chamber detection device of low energy type and high energy type |
| CN110148550A (en) * | 2019-06-17 | 2019-08-20 | 陕西卫峰核电子有限公司 | High range area radiation monitor ionization chamber after a kind of accident |
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Application publication date: 20221118 |