CN106842276B - Orifice plate type collector plate diagnosis ionization chamber - Google Patents
Orifice plate type collector plate diagnosis ionization chamber Download PDFInfo
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- CN106842276B CN106842276B CN201710142192.3A CN201710142192A CN106842276B CN 106842276 B CN106842276 B CN 106842276B CN 201710142192 A CN201710142192 A CN 201710142192A CN 106842276 B CN106842276 B CN 106842276B
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- ionization chamber
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/185—Measuring radiation intensity with ionisation chamber arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J47/00—Tubes for determining the presence, intensity, density or energy of radiation or particles
- H01J47/02—Ionisation chambers
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- Spectroscopy & Molecular Physics (AREA)
- Electron Tubes For Measurement (AREA)
- Measurement Of Radiation (AREA)
Abstract
The invention discloses an orifice plate type collector plate diagnosis ionization chamber, which solves the problem that a solid collector in the prior art has relatively long air density balance time, has the effects of shortening the air density balance time and improving the working efficiency, and adopts the technical scheme that: the ionization chamber comprises an ionization chamber shell, a collector, an incident window, a rear window and a clamping bracket, wherein the clamping bracket is arranged at the bottom of the ionization chamber shell; the ionization chamber shell and the rear window and the incident window form a sealed ionization chamber cavity, the collector is fixed in the ionization chamber shell through the support, the collector separates the ionization chamber cavity into a first cavity and a second cavity, the collector is provided with a plurality of through holes, and the first cavity and the second cavity increase the action probability of secondary electrons and air through the through holes.
Description
Technical Field
The invention relates to the technical field of ionizing radiation, in particular to an orifice plate type collector plate diagnosis ionization chamber.
Background
The X-ray imaging technology is widely applied to health examination and disease diagnosis, is an important means for resisting internal lesions of a human body in modern medicine, but has a certain injury effect on the human body by X-rays, so that the measurement and control of the radiation dose granted during examination are very important.
The flat-plate diagnosis ionization chamber is an effective tool for measuring the radiation dose of X-rays by utilizing the cavity ionization chamber principle, and the principle is that the X-rays react with the wall of the ionization chamber to generate secondary electrons, the secondary electrons collide with the air inside the ionization chamber to generate ionized charges, and the radiation dose is obtained by collecting and measuring the ionized charges.
The flat ionization chamber mainly comprises an ionization chamber shell and a central collector, wherein the central collector is usually a solid conductive wafer, and the ionization chamber shell is made into a round flat plate shape. The air density equilibration time is relatively long due to the separation of the solid collector from the ionization chamber cavity.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the orifice plate type collector plate diagnosis ionization chamber, wherein the orifice plate collector is adopted to replace a solid plate collector, so that the action probability of secondary electrons and air in the ionization chamber can be increased, the air density balance time is shortened, and the working efficiency is improved.
The invention adopts the following technical scheme:
the utility model provides an orifice plate type collector plate diagnosis ionization chamber, includes ionization chamber shell, collector, incident window, rear window and clamping bracket, ionization chamber shell's bottom be equipped with the clamping bracket, ionization chamber shell's one end be equipped with the rear window, ionization chamber shell's the other end be equipped with the incident window; the ionization chamber shell and the rear window and the incident window form a sealed ionization chamber cavity, the collector is fixed in the ionization chamber shell through the support, the collector separates the ionization chamber cavity into a first cavity and a second cavity, the collector is provided with a plurality of through holes, and the first cavity and the second cavity increase the action probability of secondary electrons and air through the through holes.
Further, the cross section of the collector is circular.
Furthermore, the collector is made of organic glass, and conductive graphite is arranged on the surface of the collector.
Further, the through holes are distributed at equal intervals.
Further, the cross section of the ionization chamber shell is round.
Further, the ionization chamber shell is made of aluminum alloy.
Furthermore, the rear window and the incident window are made of polyester films, and conductive graphite is arranged on the surfaces of the rear window and the incident window.
Further, the collector is connected with a signal outgoing line.
Further, the signal outgoing line adopts a coaxial cable.
Furthermore, the support is made of polytetrafluoroethylene.
Further, an orifice plate collector plate diagnostic ionization chamber can be used in radiation therapy.
Compared with the prior art, the invention has the beneficial effects that:
1. compared with the solid flat plate collector in the prior art, the orifice plate collector has the effect of obviously shortening the air density balance time, shortens the balance time by not less than 5 seconds, and improves the working efficiency;
2. the orifice plate type collector can increase the action probability of secondary electrons and air in an ionization chamber, and the sensitivity of the ionization chamber is improved by 2%.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application.
FIG. 1 is a front view of a schematic structure of the present invention;
FIG. 2 is a schematic side view of the structure of the present invention;
the ionization chamber comprises a 1-ionization chamber shell, a 2-incident window, a 3-collector, a 4-clamping support, a 5-rear window, a 6-signal outgoing line, a 7-support, an 8-through hole, a 9-first cavity and a 10-second cavity.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As described in the background art, the solid collector in the prior art has the defect of relatively long air density balance time, and in order to solve the technical problems, the application provides an orifice plate collector flat plate diagnostic ionization chamber.
In a typical embodiment of the present application, as shown in fig. 1-2, an orifice plate type collector plate diagnostic ionization chamber is provided, which comprises an ionization chamber housing 1, a collector 3, an incident window 2, a rear window 5 and a clamping bracket 4, wherein the bottom of the ionization chamber housing 1 is provided with the clamping bracket 4 for supporting the ionization chamber, one end of the ionization chamber housing 1 is provided with the rear window 5, the other end of the ionization chamber housing 1 is provided with the incident window 2, the ionization chamber housing 1, the rear window 5 and the incident window 2 form a sealed ionization chamber cavity, the collector 3 is fixed in the ionization chamber housing 1 through a support 7, the collector 3 separates the ionization chamber cavity into a first cavity 9 and a second cavity 10, the collector 3 is provided with a plurality of through holes 8, and the first cavity 9 and the second cavity 10 increase the action probability of secondary electrons and air through the through holes 8.
Further, the cross section of the collector 3 is circular.
Furthermore, the collector 3 is made of organic glass, and conductive graphite is arranged on the surface of the collector 3.
Further, the through holes 8 are distributed at equal intervals.
Further, the cross section of the ionization chamber housing 1 is circular.
Further, the ionization chamber housing 1 is made of aluminum alloy.
Furthermore, the rear window 5 and the incident window 2 are made of polyester film, and conductive graphite is arranged on the surfaces of the rear window 5 and the incident window 2.
Further, the collector 3 is connected with a signal outgoing line 6.
Further, the signal outgoing line 6 is a coaxial cable.
Further, the support 7 is made of polytetrafluoroethylene, the section of the support is circular, and the width of the support is larger than the thickness of the collector.
Further, an orifice plate collector plate diagnostic ionization chamber can be used in radiation therapy.
In another embodiment of the present application, the width of the ionization chamber housing 1 is 25mm, and the diameters of the rear window 5 and the incident window 2 are 50mm; machining the collector 3 by using a 0.5mm thick organic glass plate, wherein the machined collector 3 has a circular cross section and a diameter of 48mm, and uniformly punching through holes 8 in the organic glass plate, wherein the diameter of the through holes 8 is 2mm; a through hole is drilled at the central position of the collector 3, a through hole is drilled at the periphery of the through hole at the central position, and the number of the through holes is five; and (3) coating conductive graphite on the surface of the collector, and airing at 50 ℃ to form the orifice plate type collector.
The number of the through holes may be specifically set according to the actual collector size, and is not limited to 5.
Compared with a solid flat plate collector, the orifice plate collector has the effect of obviously shortening the air density balance time, shortens the balance time by not less than 5 seconds and improves the working efficiency; the probability of the action of secondary electrons and air in the ionization chamber can be increased, and the sensitivity of the ionization chamber is improved by 2%.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (7)
1. The utility model provides a dull and stereotyped diagnosis ionization chamber of orifice plate type collector, its characterized in that includes ionization chamber shell, collector, incident window, rear window and centre gripping support, ionization chamber shell's bottom be equipped with the centre gripping support, ionization chamber shell's one end be equipped with the rear window, ionization chamber shell's the other end be equipped with the incident window; the ionization chamber shell, the rear window and the incident window form a sealed ionization chamber cavity;
the collector is fixed in the ionization chamber shell through a support;
the collector divides the ionization chamber cavity into a first cavity and a second cavity, and a plurality of through holes are formed in the collector;
the first cavity and the second cavity increase the action probability of secondary electrons and air through the through holes;
the cross section of the collector is circular;
the collector is made of organic glass, and conductive graphite is arranged on the surface of the collector;
the through holes are distributed at equal intervals.
2. The orifice plate collector plate diagnostic ionization chamber of claim 1 wherein said ionization chamber housing is circular in cross-section.
3. The plate collector plate diagnostic ionization chamber of claim 2 wherein the ionization chamber housing is aluminum alloy.
4. The orifice plate collector plate diagnostic ionization chamber of claim 1 wherein the rear window and the entrance window are made of polyester film, and conductive graphite is disposed on the surfaces of the rear window and the entrance window.
5. The plate-type collector plate diagnostic ionization chamber of claim 1, wherein the collector is connected to a signal lead.
6. The aperture plate collector plate diagnostic ionization chamber of claim 5 wherein said signal lead is a coaxial cable.
7. The plate collector plate diagnostic ionization chamber of claim 1 wherein said support is made of polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710142192.3A CN106842276B (en) | 2017-03-10 | 2017-03-10 | Orifice plate type collector plate diagnosis ionization chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710142192.3A CN106842276B (en) | 2017-03-10 | 2017-03-10 | Orifice plate type collector plate diagnosis ionization chamber |
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| Publication Number | Publication Date |
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| CN106842276A CN106842276A (en) | 2017-06-13 |
| CN106842276B true CN106842276B (en) | 2023-06-16 |
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| CN201710142192.3A Active CN106842276B (en) | 2017-03-10 | 2017-03-10 | Orifice plate type collector plate diagnosis ionization chamber |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105629286A (en) * | 2016-01-28 | 2016-06-01 | 中国计量科学研究院 | Ionization chamber used for measuring ambient dose equivalent |
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| 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 |
| CN101158723A (en) * | 2006-02-10 | 2008-04-09 | 中国人民解放军63960部队 | End window ionization chamber |
| CN201017034Y (en) * | 2007-03-17 | 2008-02-06 | 中国工程物理研究院核物理与化学研究所 | Pipeline interior surface radioactive pollution measurement mechanism |
| CN202661630U (en) * | 2012-06-08 | 2013-01-09 | 中国原子能科学研究院 | Transmission type monitoring ionization chamber suitable for measurement of low-energy X-rays |
| RU124434U1 (en) * | 2012-06-22 | 2013-01-20 | Федеральное государственное унитарное предприятие "Всероссийский электротехнический институт им. В.И. Ленина" | MASS SPECTROMETER |
| CN104570038B (en) * | 2014-12-30 | 2017-07-14 | 中国原子能科学研究院 | A kind of method and device of quick measurement radon consistence |
| CN105738940B (en) * | 2016-04-26 | 2019-02-05 | 西北核技术研究所 | A kind of detector for beam profile uniformity on-line measurement |
| CN206531969U (en) * | 2017-03-10 | 2017-09-29 | 山东中测校准质控技术有限公司 | A kind of orifice-plate type collector flat board diagnoses ionisation chamber |
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2017
- 2017-03-10 CN CN201710142192.3A patent/CN106842276B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105629286A (en) * | 2016-01-28 | 2016-06-01 | 中国计量科学研究院 | Ionization chamber used for measuring ambient dose equivalent |
Non-Patent Citations (2)
| Title |
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| 对医院常规医疗设备集中管理模式的研究;付园;张伟;;临床医药文献电子杂志(12);2362 * |
| 平板电离室的研制及改进;陈义珍;林敏;苏丹;孟宪芳;夏文;陈克胜;徐利军;;原子能科学技术(S1);380-384 * |
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| CN106842276A (en) | 2017-06-13 |
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