CN214473628U - High-pressure ionization chamber - Google Patents
High-pressure ionization chamber Download PDFInfo
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- CN214473628U CN214473628U CN202120232024.5U CN202120232024U CN214473628U CN 214473628 U CN214473628 U CN 214473628U CN 202120232024 U CN202120232024 U CN 202120232024U CN 214473628 U CN214473628 U CN 214473628U
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Abstract
The utility model discloses a high-voltage ionization chamber aims at reducing the saturation voltage of ionization chamber. The high-voltage ionization chamber comprises a high-voltage electrode and a collector, wherein the high-voltage electrode is a hollow spherical shell, the collector is rod-shaped, a cylindrical inner cylinder and a cylindrical outer cylinder which are matched in a nested mode are arranged in the hollow spherical shell, the cylindrical inner cylinder is in contact with the inner wall of the hollow spherical shell and conducts electricity, and the cylindrical outer cylinder is arranged in the hollow spherical shell in a suspended mode and is in contact with the collector and conducts electricity; the collector is inserted into the cylindrical inner cylinder, and the axes of the cylindrical inner cylinder, the cylindrical outer cylinder and the collector are overlapped and pass through the spherical center of the hollow spherical shell; the distance from the outer wall of the collector to the inner wall of the cylindrical inner cylinder, the distance from the outer wall of the cylindrical inner cylinder to the inner wall of the cylindrical outer cylinder and the maximum distance from the outer wall of the cylindrical outer cylinder to the inner wall of the hollow spherical shell are equal.
Description
Technical Field
The utility model belongs to the technical field of radiation monitoring equipment, especially, relate to a high-pressure ionization chamber.
Background
The ionization chamber is a detector for measuring ionizing radiation by utilizing the ionization effect of the ionizing radiation, and is also called as an ion chamber, the ionization chamber mainly comprises a collector and a high-voltage electrode, gas is arranged between the collector and the high-voltage electrode, and when gamma rays in the environment penetrate through the shell of the high-voltage electrode and enter the interior of the high-voltage electrode, the gamma rays and the gas generate the ionization effect. Because of the electric field effect between the high voltage electrode and the collector, positive ions generated by the ionization effect are enriched towards the collector, electrons are enriched towards the high voltage electrode, and the high voltage electrode and the collector are led out to form an outer loop to form a current signal. The output current signal is weak (pico ampere grade), and generally needs to be measured after passing through an operational amplifier, and because the intensity of the current signal is in direct proportion to the gamma radiation dose rate under the same condition, the gamma radiation dose rate value can be reversely deduced by measuring the current intensity.
The performance index of the high-voltage ionization chamber is many, and one of the more key indexes is saturation voltage. When the applied voltage increases from zero to top, the output current signal increases, and when the ionization effect reaches the saturation state, the current signal reaches the maximum value, and the voltage value at this time is called as the saturation voltage. Generally, it is desirable that the saturation voltage be as low as possible so that the ionization chamber can operate at a relatively low voltage, and that the chamber be relatively safe and stable.
In summary, how to reduce the saturation voltage of the ionization chamber is an urgent technical problem to be solved.
SUMMERY OF THE UTILITY MODEL
The main object of the present invention is to provide a high voltage ionization chamber, which is aimed at reducing the saturation voltage of the ionization chamber.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the high-voltage ionization chamber comprises a high-voltage electrode and a collector, wherein the high-voltage electrode is a hollow spherical shell, the collector is rod-shaped, a cylindrical inner cylinder and a cylindrical outer cylinder which are matched in a nested mode are arranged in the hollow spherical shell, the cylindrical inner cylinder is in contact with the inner wall of the hollow spherical shell and conducts electricity, and the cylindrical outer cylinder is arranged in the hollow spherical shell in a suspended mode and is in contact with the collector and conducts electricity;
the collector is inserted into the cylindrical inner cylinder, and the axes of the cylindrical inner cylinder, the cylindrical outer cylinder and the collector are overlapped and pass through the spherical center of the hollow spherical shell; wherein the content of the first and second substances,
the distance from the outer wall of the collector to the inner wall of the cylindrical inner cylinder, the distance from the outer wall of the cylindrical inner cylinder to the inner wall of the cylindrical outer cylinder and the maximum distance from the outer wall of the cylindrical outer cylinder to the inner wall of the hollow spherical shell are equal.
Specifically, the cylindrical inner cylinder is welded and fixed on the inner wall of the hollow spherical shell.
Specifically, the cylindrical outer cylinder is fixed on the collector electrode through a conductive end cover.
Specifically, the top end of the cylindrical outer cylinder is sealed through the conductive end cover, the bottom end of the cylindrical outer cylinder is arranged in an open mode, and the top open end of the cylindrical inner cylinder is arranged into the cylindrical outer cylinder from the bottom end of the cylindrical outer cylinder.
Specifically, the collector is welded and fixed on the conductive end cover.
Specifically, the collector penetrates out of the hollow spherical shell, and an insulator is arranged between the collector and the hollow spherical shell.
Specifically, a guard ring is arranged on the insulator.
In particular, the collector electrode is a copper rod.
Specifically, the wall thickness of the cylindrical outer cylinder and the cylindrical inner cylinder is 0.2 mm.
Specifically, the gas filled in the hollow spherical shell is high-pressure inert gas.
Compared with the prior art, the utility model discloses the beneficial effect who has lies in:
compared with the traditional ionization chamber, the utility model discloses an respectively increased a cylindrical barrel on collector and high-voltage pole, formed the nested structure of high-voltage pole-collector-high-voltage pole-collector from outside to inside, show the saturation voltage who reduces the ionization chamber.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural view of a high-pressure ionization chamber provided by an embodiment of the present invention;
wherein: 1. a high voltage pole; 2. a collector; 3. a cylindrical inner barrel; 4. a cylindrical outer barrel; 5. a conductive end cap; 6. an insulator; 7. a guard ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, a high-voltage ionization chamber comprises a high-voltage electrode 1 and a collector 2, wherein the high-voltage electrode 1 is a hollow spherical shell, the collector 2 is rod-shaped, the collector 2 penetrates through the wall surface of the hollow spherical shell to be connected with an external signal outgoing line, the other end of the signal outgoing line is connected with a secondary instrument, an insulator 6 is arranged between the collector 2 and the hollow spherical shell, a protection ring 7 is arranged on the insulator 6, and the protection ring 7 is arranged on the outer side of the ionization chamber and grounded, so that the safety of the ionization chamber in the use process is ensured.
Specifically, a cylindrical inner cylinder 3 and a cylindrical outer cylinder 4 which are in nested fit are vertically arranged in a ring hollow spherical shell, the bottom end of the cylindrical inner cylinder 3 is in contact with the inner wall of the hollow spherical shell and is electrically conductive, the cylindrical outer cylinder 4 is arranged in the hollow spherical shell in a suspended mode and is in contact with a collector 2 and is electrically conductive, the collector 2 is inserted into the cylindrical inner cylinder 3, the axes of the cylindrical inner cylinder 3, the cylindrical outer cylinder 4 and the collector 2 are coincided and pass through the spherical center of the hollow spherical shell, and the spherical center of the hollow spherical shell is located in the cylindrical outer cylinder 4; the distance from the outer wall of the collector 2 to the inner wall of the cylindrical inner cylinder 3 is D1, the distance from the outer wall of the cylindrical inner cylinder 3 to the inner wall of the cylindrical outer cylinder 4 is D2, the maximum distance from the outer wall of the cylindrical outer cylinder 4 to the inner wall of the hollow spherical shell is D3, and D1-D2-D3.
In this embodiment, under the condition that the applied voltage is not changed, the distance between the high voltage electrode 1 and the collector 2 becomes 1/3, so the electric field intensity becomes 3 times, the acting force on positive ions and electrons formed by incident gamma rays in the inert gas also becomes 3 times, and the recombination probability of the positive ions and the electrons is reduced to nearly 1/3. Therefore, the voltage (saturation voltage) reaching saturation is reduced to about 1/3, and the saturation voltage is reduced remarkably, so that the ionization chamber can work at a lower voltage, and is relatively safe and good in stability.
Compared with the traditional ionization chamber, the ionization chamber has the advantages that the purpose of remarkably reducing the saturation voltage of the ionization chamber can be achieved only by adding one cylindrical barrel on each of the collector 2 and the high-voltage electrode 1 and forming a nested structure of the high-voltage electrode, the collector, the high-voltage electrode and the collector from outside to inside, and the ionization chamber is simple in structure and low in modification cost.
Referring to fig. 1, in some possible embodiments, the bottom end of the cylindrical inner cylinder 3 is directly welded and fixed on the inner wall of the hollow spherical shell and is in contact with the hollow spherical shell for conducting electricity, and the cylindrical outer cylinder 4 is directly welded and fixed on the collector 2 through the conductive end cover 5, but it needs to be ensured that the cylindrical outer cylinder 4 is suspended in the hollow spherical shell and is not in contact with the hollow spherical shell for conducting electricity. By adopting the design mode, the cylindrical inner barrel 3 and the cylindrical outer barrel 4 can be firmly and reliably arranged in the hollow spherical shell.
Referring to fig. 1, specifically, the top of the cylindrical inner barrel 3 is arranged in an open manner, the collector 2 is inserted into the inner cavity of the cylindrical inner barrel 3 from the top, the top of the cylindrical outer barrel 4 is arranged in a closed manner through the conductive end cover 5, the bottom of the cylindrical outer barrel 4 is arranged in an open manner, the cylindrical inner barrel 3 is inserted into the inner cavity of the cylindrical outer barrel 4 from the bottom of the cylindrical outer barrel 4, and the collector 2 penetrates out of the top of the cylindrical outer barrel 4 and extends out of the hollow spherical shell.
Wherein, the preparation material of collector 2 can adopt the bar copper, and cylindrical inner tube 3 and cylindrical urceolus 4 all adopt the electrically conductive material preparation, and the wall thickness can be controlled about 0.2mm, and cylindrical inner tube 3 can adopt the material preparation the same with hollow spherical shell, and cylindrical urceolus 4 can adopt the material preparation the same with collector 2, and the gas of filling in the hollow spherical shell is high-pressure inert gas.
The above examples are merely illustrative of the present invention clearly and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.
Claims (10)
1. High-pressure ionization chamber, including high-voltage electrode (1) and collector (2), high-voltage electrode (1) is a hollow spherical shell, collector (2) are shaft-like, its characterized in that: a cylindrical inner barrel (3) and a cylindrical outer barrel (4) which are nested and matched are arranged in the hollow spherical shell, the cylindrical inner barrel (3) is in contact with the inner wall of the hollow spherical shell and conducts electricity, and the cylindrical outer barrel (4) is arranged in the hollow spherical shell in a suspended mode and is in contact with the collector (2) and conducts electricity;
the collector (2) is inserted into the cylindrical inner cylinder (3), and the axes of the cylindrical inner cylinder (3), the cylindrical outer cylinder (4) and the collector (2) are coincident and pass through the spherical center of the hollow spherical shell; wherein the content of the first and second substances,
the distance from the outer wall of the collector (2) to the inner wall of the cylindrical inner cylinder (3), the distance from the outer wall of the cylindrical inner cylinder (3) to the inner wall of the cylindrical outer cylinder (4) and the maximum distance from the outer wall of the cylindrical outer cylinder (4) to the inner wall of the hollow spherical shell are equal.
2. The high pressure ionization chamber of claim 1, wherein: the cylindrical inner cylinder (3) is welded and fixed on the inner wall of the hollow spherical shell.
3. The high pressure ionization chamber of claim 1, wherein: the cylindrical outer cylinder (4) is fixed on the collector (2) through a conductive end cover (5).
4. The high pressure ionization chamber of claim 3, wherein: the top of cylindrical urceolus (4) is passed through electrically conductive end cover (5) are sealed, and the bottom is opened and is set up, the open end in top of cylindrical inner tube (3) is followed the bottom of cylindrical urceolus (4) is put into in cylindrical urceolus (4).
5. The high pressure ionization chamber of claim 4, wherein: the collector (2) is fixed on the conductive end cover (5) in a welding mode.
6. The high pressure ionization chamber of claim 1, wherein: the collector (2) penetrates out of the hollow spherical shell, and an insulator (6) is arranged between the collector (2) and the hollow spherical shell.
7. The high pressure ionization chamber of claim 6, wherein: and a protection ring (7) is arranged on the insulator (6).
8. The high pressure ionization chamber of claim 1, wherein: the collector (2) is a copper bar.
9. The high pressure ionization chamber of claim 1, wherein: the wall thicknesses of the cylindrical outer cylinder (4) and the cylindrical inner cylinder (3) are both 0.2 mm.
10. The high pressure ionization chamber of claim 1, wherein: the gas filled in the hollow spherical shell is high-pressure inert gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120232024.5U CN214473628U (en) | 2021-01-27 | 2021-01-27 | High-pressure ionization chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120232024.5U CN214473628U (en) | 2021-01-27 | 2021-01-27 | High-pressure ionization chamber |
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| CN214473628U true CN214473628U (en) | 2021-10-22 |
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| CN202120232024.5U Active CN214473628U (en) | 2021-01-27 | 2021-01-27 | High-pressure ionization chamber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114252717A (en) * | 2021-12-16 | 2022-03-29 | 惠州Tcl移动通信有限公司 | Electronic equipment and method for judging radio frequency test mode of electronic equipment |
| CN115356547A (en) * | 2022-08-12 | 2022-11-18 | 陕西卫峰核电子有限公司 | Ionization chamber sensor and measuring method thereof |
-
2021
- 2021-01-27 CN CN202120232024.5U patent/CN214473628U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114252717A (en) * | 2021-12-16 | 2022-03-29 | 惠州Tcl移动通信有限公司 | Electronic equipment and method for judging radio frequency test mode of electronic equipment |
| CN114252717B (en) * | 2021-12-16 | 2023-08-11 | 惠州Tcl移动通信有限公司 | Electronic equipment and method for judging radio frequency test mode of electronic equipment |
| CN115356547A (en) * | 2022-08-12 | 2022-11-18 | 陕西卫峰核电子有限公司 | Ionization chamber sensor and measuring method thereof |
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