CN108614287A - A kind of ionization chamber detector of achievable beam homogeneity on-line measurement - Google Patents
A kind of ionization chamber detector of achievable beam homogeneity on-line measurement Download PDFInfo
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- CN108614287A CN108614287A CN201810283713.1A CN201810283713A CN108614287A CN 108614287 A CN108614287 A CN 108614287A CN 201810283713 A CN201810283713 A CN 201810283713A CN 108614287 A CN108614287 A CN 108614287A
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- ionization chamber
- dimensional profile
- profile survey
- line measurement
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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
- G01T1/29—Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
- G01T1/2914—Measurement of spatial distribution of radiation
- G01T1/2921—Static instruments for imaging the distribution of radioactivity in one or two dimensions; Radio-isotope cameras
- G01T1/2935—Static instruments for imaging the distribution of radioactivity in one or two dimensions; Radio-isotope cameras using ionisation detectors
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Abstract
The present invention relates to a kind of ionization chamber detectors of achievable beam homogeneity on-line measurement, including core unit, entrance window and exit window in ionization chamber enclosure, ionisation chamber, core unit is made of two high-pressure stages and a signal collection in the ionisation chamber, and the signal collection is located among two high-pressure stages；The pickup electrode is made of the first one-dimensional profile survey unit and the second one-dimensional profile survey unit formed respectively in electrode film tow sides, and the first one-dimensional profile survey unit and the second one-dimensional profile survey unit are respectively used to measure one-dimensional beam profile both horizontally and vertically.The present invention forms two one-dimensional profile survey units by the tow sides in an electrode film, and cost is greatly saved, simplifies mechanical part, while reducing the quality and thickness of detector, reduces manufacturing cost.
Description
Technical field
The invention belongs to heavy ion (or proton) treatment tumour technology or line irradiation effect experimental technique fields, especially relate to
And a kind of ionization chamber detector of achievable beam homogeneity on-line measurement.
Background technology
The gridding detector (SEM grid) of the silk composition based on secondary electron principle is although can also realize in the prior art
Beam profile measure, but be only applicable to beam intensity it is bigger when.Using based on ionisation chamber when stream is strong relatively low
The detector of principle plays the role of amplification to beam intensity signal itself, can be used for weak current measurement, use scope bigger.According to
Collecting geometry has pixel type and strip-type, pixel type detector to require higher to electronics port number, increase cost,
And strip-type reduces electronics demand while can meet one-dimensional profile survey substantially.However, current strip-type is two
It opens and is respectively completed the division of both direction band on electrode film, increase the cost and mechanical complexity of detector.
Invention content
The object of the present invention is to provide a kind of ionization chamber detectors of achievable beam homogeneity on-line measurement, to simplify machine
Tool complexity reduces manufacturing cost.
The present invention provides a kind of ionization chamber detectors of achievable beam homogeneity on-line measurement, including outside ionisation chamber
Core unit, entrance window and exit window in shell, ionisation chamber, core unit is made of two high-pressure stages and a signal collection in ionisation chamber,
Signal collection is located among two high-pressure stages；
Pickup electrode is by the first one-dimensional profile survey unit and the second one-dimensional section that are formed respectively in electrode film tow sides
Measuring unit forms, and the first one-dimensional profile survey unit and the second one-dimensional profile survey unit are respectively used to measure horizontal and vertical
The one-dimensional beam profile in direction.
Further, high-pressure stage, signal collection, entrance window and exit window are made of thin material.
Further, electrode film is polyimide substrate.
Further, the manufacturing method of pickup electrode includes：
In the two sides metal cladding of polyimide substrate, metal layer is divided into strip-form one using photoetching or PCB technologies
Profile survey unit is tieed up, and keeps the first one-dimensional profile survey unit and the second one-dimensional profile survey unit orthogonal.
Further, high pressure is extremely aluminized organic film.
Further, ionization chamber enclosure is made of radiation resistance material.
According to the above aspect of the present invention, the ionization chamber detector by the way that beam homogeneity on-line measurement can be achieved, in an electrode film
Tow sides formed two one-dimensional profile survey units, cost is greatly saved, simplifies mechanical part, while reducing spy
The quality and thickness for surveying device, reduce manufacturing cost.
Above description is only the general introduction of technical solution of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, below with presently preferred embodiments of the present invention and after coordinating attached drawing to be described in detail such as.
Description of the drawings
Fig. 1 is core unit in a kind of ionization chamber detector ionisation chamber of achievable beam homogeneity on-line measurement of the present invention
Structural schematic diagram.
Specific implementation mode
With reference to the accompanying drawings and examples, the specific implementation mode of the present invention is described in further detail.Implement below
Example is not limited to the scope of the present invention for illustrating the present invention.
Join shown in Fig. 1, present embodiments provide a kind of ionization chamber detector of achievable beam homogeneity on-line measurement, wraps
Include ionization chamber enclosure, core unit, entrance window and exit window in ionisation chamber, core unit (being based on plate ionisation chamber) in ionisation chamber,
It is made of two high-pressure stages 1 and a signal collection, signal collection is located among two high-pressure stages 1, is with high-pressure stage load negative high voltage
Example, then electric field is by signal collection direction high-pressure stage.
Pickup electrode is one-dimensional by the first one-dimensional profile survey unit 22 and second formed respectively in 21 tow sides of electrode film
Profile survey unit 23 forms, and 22 and second one-dimensional profile survey unit 23 of the first one-dimensional profile survey unit is respectively used to measure
One-dimensional beam profile both horizontally and vertically.
The ionization chamber detector forms two one-dimensional profile survey units, greatly by the tow sides in an electrode film
It saved cost greatly, simplified mechanical part, while having reduced the quality and thickness of detector, having reduced manufacturing cost.
In the present embodiment, high-pressure stage, signal collection, entrance window and exit window are made of thin material, with reduce thickness,
Mitigate the total quality of detector.
In the present embodiment, pickup electrode uses photoetching technique or flexible circuit plate technique, in polyimide substrate (electrode
Film) two sides metal cladding, metal layer is divided into strip-form collector (one-dimensional profile survey list using photoetching or PCB technologies
Member), obverse and reverse sides band (the first one-dimensional profile survey unit 22, the second one-dimensional profile survey unit 23) is orthogonal, to
Realize the measurement of both horizontally and vertically two one-dimensional beam profiles.
In the present embodiment, high-pressure stage 1 is the organic film (PET film) aluminized of several microns of thickness, the effect aluminized be in order to
Conduction, to form uniform electric field in workspace.
In the present embodiment, (radiation hardness ionisation chamber) is made using radiation resistance material in ionization chamber enclosure, can be used in beam
It measures, and the influence to quality of beam can almost be ignored, and can be used for before target station or therapeutic room.
The above is only a preferred embodiment of the present invention, it is not intended to restrict the invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is several improvement and
Modification, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of ionization chamber detector of achievable beam homogeneity on-line measurement, which is characterized in that including ionization chamber enclosure, electricity
From indoor core unit, entrance window and exit window, core unit is made of two high-pressure stages and a signal collection in the ionisation chamber, institute
Signal collection is stated among two high-pressure stages；
The pickup electrode is by the first one-dimensional profile survey unit and the second one-dimensional section that are formed respectively in electrode film tow sides
Measuring unit forms, the first one-dimensional profile survey unit and the second one-dimensional profile survey unit be respectively used to measurement it is horizontal and
The one-dimensional beam profile of vertical direction.
2. a kind of ionization chamber detector of achievable beam homogeneity on-line measurement according to claim 1, feature exist
In the high-pressure stage, signal collection, entrance window and exit window are made of thin material.
3. a kind of ionization chamber detector of achievable beam homogeneity on-line measurement according to claim 2, feature exist
In the electrode film is polyimide substrate.
4. a kind of ionization chamber detector of achievable beam homogeneity on-line measurement according to claim 3, feature exist
In the manufacturing method of the pickup electrode includes：
In the two sides metal cladding of the polyimide substrate, the metal layer is divided into band using photoetching or PCB technologies
The one-dimensional profile survey unit of shape, and the described first one-dimensional profile survey unit is made to hang down mutually with the second one-dimensional profile survey unit
Directly.
5. a kind of ionization chamber detector of achievable beam homogeneity on-line measurement according to claim 2, feature exist
It extremely aluminizes organic film in, the high pressure.
6. a kind of ionization chamber detector of achievable beam homogeneity on-line measurement according to claim 2, feature exist
In the ionization chamber enclosure is made of radiation resistance material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810283713.1A CN108614287B (en) | 2018-04-02 | 2018-04-02 | Ionization chamber detector capable of realizing on-line measurement of beam uniformity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810283713.1A CN108614287B (en) | 2018-04-02 | 2018-04-02 | Ionization chamber detector capable of realizing on-line measurement of beam uniformity |
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| CN108614287A true CN108614287A (en) | 2018-10-02 |
| CN108614287B CN108614287B (en) | 2021-01-12 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110286403A (en) * | 2019-07-09 | 2019-09-27 | 中国科学院近代物理研究所 | A kind of charge-trapping two dimension line contour probe and method of interlocking |
| CN110879409A (en) * | 2019-11-20 | 2020-03-13 | 中国科学院近代物理研究所 | Detector for monitoring density distribution of wide charged particle beams in real time |
| CN111282161A (en) * | 2020-02-28 | 2020-06-16 | 合肥中科离子医学技术装备有限公司 | Beam diagnosis system of proton treatment device |
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| CN110286403A (en) * | 2019-07-09 | 2019-09-27 | 中国科学院近代物理研究所 | A kind of charge-trapping two dimension line contour probe and method of interlocking |
| CN110879409A (en) * | 2019-11-20 | 2020-03-13 | 中国科学院近代物理研究所 | Detector for monitoring density distribution of wide charged particle beams in real time |
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| CN111282161A (en) * | 2020-02-28 | 2020-06-16 | 合肥中科离子医学技术装备有限公司 | Beam diagnosis system of proton treatment device |
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| CN108614287B (en) | 2021-01-12 |
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