CN104793229B - Ray detector - Google Patents
Ray detector Download PDFInfo
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- CN104793229B CN104793229B CN201510188484.1A CN201510188484A CN104793229B CN 104793229 B CN104793229 B CN 104793229B CN 201510188484 A CN201510188484 A CN 201510188484A CN 104793229 B CN104793229 B CN 104793229B
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- electrode glass
- photocathode
- resistive plate
- scintillator
- ray
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Abstract
The invention discloses a kind of ray detector, and it includes resistive plate room, scintillator and photocathode.The resistive plate room includes first electrode glass, and the photocathode is on the first electrode glass.The scintillator is located at the resistive plate outdoor.The sensitivity degree of the detector detected ray is high, also there is quantum enhancing function, it is and high with position resolution power, the features such as cheap, it can be applied to single photon emission tomographic imaging (Single Photon Emission Computed Tomography, SPECT) and in the detector system such as positron emission tomography (Positron Emission Tomography, PET).
Description
Technical field
The invention belongs to radiation detection field, more particularly to a kind of ray detector.
Background technology
In the detector system such as single photon emission tomographic imaging (SPECT) and positron emission tomography (PET), by
In with scintillator structure, the detector has the characteristics of detection efficient is high, sensitive to ray, but its resolution capability is low.
The resolution force of resistive plate cell structure detector is high, but its sensitivity to ray is low.
The content of the invention
It is contemplated that at least solves one of technical problem present in prior art.Penetrated therefore, the present invention provides one kind
Line detector.
The ray detector of better embodiment of the present invention, including resistive plate room, scintillator and photocathode, it is described resistive
Plate room includes first electrode glass, and the photocathode is on first electrode glass；The scintillator is located at the resistive plate
Outdoor, the scintillator are arranged on the first electrode glass.
In the ray detector of better embodiment of the present invention, because scintillator is to the high sensitivity of ray, detection efficient
Height, and resistive plate cell structure resolution capability is strong, and resistive plate room and scintillator are combined, and the Gao Ling of ray detector can be achieved
Sensitivity, the function of high resolution.Photocathode in the detector has the function of opto-electronic conversion, ray information can be converted into electricity
Sub-information, located at the scintillator of resistive plate outdoor, it is easy to receive the ray sent out of human body, so as to improve ray detector
Sensitivity and detection efficient.
In some embodiments, the photocathode is located at resistive plate chamber interior, and with the first electrode glass table
Face contacts.
In some embodiments, the resistive plate room also includes second electrode glass and carbon film, the second electrode glass
Glass is located at the resistive plate chamber interior, and the second electrode glass is parallel to each other with the first electrode glass, and the carbon film is set
In on the surface of the second electrode glass away from the photocathode, the carbon film and the photocathode respectively added with more than
1000V generating positive and negative voltage, the resistivity under the first electrode glass and the second electrode glass normal temperature are more than 1012Ω.cm。
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention is from combining in description of the accompanying drawings below to embodiment by change
Obtain substantially and be readily appreciated that, wherein：
Fig. 1 is the ray detector structural representation of better embodiment of the present invention.
Embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise " are based on orientation shown in the drawings or position relationship, are for only for ease of
Description is of the invention to be described with simplified, rather than the device or element of instruction or hint meaning must be with specific orientation, Yi Te
Fixed azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are only used for
Purpose is described, and it is not intended that instruction or hint relative importance or the implicit quantity for indicating indicated technical characteristic.
Thus, " first " is defined, the feature of " second " can be expressed or implicitly includes one or more feature.
In description of the invention, " multiple " are meant that two or more, unless otherwise specifically defined.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection or can mutually communicate；Can be joined directly together, can also be by between intermediary
Connect connected, can be connection or the interaction relationship of two elements of two element internals.For the ordinary skill of this area
For personnel, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it " under "
Can directly it be contacted including the first and second features, it is not directly to contact but pass through it that can also include the first and second features
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " to include first special
Sign is directly over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " fisrt feature that includes are directly over second feature and oblique upper, or be merely representative of
Fisrt feature level height is less than second feature.
The present invention provides a kind of ray detector, is explained below in conjunction with the accompanying drawings.
Fig. 1 is the ray detector structural representation of better embodiment of the present invention.
The ray detector of better embodiment of the present invention includes resistive plate room 10, scintillator 20 and photocathode 30, institute
Stating resistive plate room 10 includes first electrode glass 101a, and the photocathode 30 is on first electrode glass 101a；The sudden strain of a muscle
Bright body 20 is outside the resistive plate room 10.
In the ray detector of better embodiment of the present invention, the scintillator 20 is to the high sensitivity of ray, detection effect
Rate is high, and the scintillator 20 can produce visible ray after by ray excitation.And the resistive plate room 10 is strong with resolution capability, knot
Structure is simple, it is cheap the features such as, the resistive plate room 10 and the scintillator 20 are combined, can be achieved ray detector
High sensitivity, the function of high resolution, and simple in construction is cheap, can be widely applied on X-ray detection X field, especially
It is in the detector system such as single photon emission tomographic imaging (SPECT) and positron emission tomography (PET).The photoelectricity
Negative electrode 30 plays the role of opto-electronic conversion, can receive the visible ray that the scintillator 20 is sent, and inspires electronics, and energy can
See that optical information is converted to electronic information.Because each electronics is sent from the photocathode 30, therefore from the photocathode
30 electronics sent and the number of electrons approximately equal for causing snowslide, so adding the resistive plate room of the photocathode 30 just
Equivalent to the photoelectric multiplier of a gas, the detector has very high photoelectron gain function.The scintillator 20 is set
Outside the resistive plate room 10, be easy to receive the ray that sends out of human body, so as to improve the sensitivity of ray detector and
Detection efficient.
In some embodiments, the photocathode 30 is inside the resistive plate room 10, and with the described first electricity
Pole glass 101a surfaces contact.
It is arranged such, the photocathode 30 is excited rear caused electrons and the working gas in the resistive plate room 10
Have an effect, working gas ionizes out secondary electron.The photocathode 30 contacts with the first electrode glass 101a surfaces,
After the photocathode 30 adds voltage, the corresponding first electrode glass 101a can also add voltage, realize resistive plate
The alive requirement of battery lead plate in the technology of room.
In some embodiments, the scintillator 20 is arranged on the first electrode glass 101a.
It is arranged such, the distance of the scintillator 20 and the photocathode 30 can be shortened, reduces flicker described in outer bound pair
The influence for the visible ray that body 20 is sent, the efficiency that the photocathode 30 collects the visible ray that the scintillator 20 is sent is improved,
So as to further improve the detection efficient of ray detector, sensitivity and resolution capability.
In some embodiments, working gas is filled with the resistive plate room 10, and the pressure of working gas is one
Individual atmospheric pressure.
It is arranged such, under the electronic action that the photocathode 30 is sent, working gas ionizes out more secondary electrons,
Snowslide is formed, increases induced-current caused by secondary electron.
Further, the working gas can be the gases such as freon or xenon, and such gas is in the presence of electronics
Secondary electron can be ionized out and form snowslide.
In some embodiments, the resistive plate room 10 also includes second electrode glass 101b and carbon film 102, and described
Two electrode glass 101b are inside the resistive plate room 10, the second electrode glass 101b and the first electrode glass
101a is parallel to each other, and the carbon film 102 is on surfaces of the second electrode glass 101b away from the photocathode 30, institute
Carbon film 102 and the photocathode 30 are stated respectively added with the generating positive and negative voltage more than 1000V, the first electrode glass 101a and institute
The resistivity stated under second electrode glass 101b normal temperature is more than 1012Ω.cm。
It is arranged such, can makes to form electricity between the first electrode glass 101a and the second electrode glass 101b
, in the presence of electric field, the electronic energy that the photocathode 30 is sent obtains high-energy, makes the work in the resistive plate room 10
Go out secondary electron as gas ionization and form snowslide.
In some embodiments, the resistive plate room 10 also includes reading circuit plate 104 and electronics circuit 105, institute
State reading circuit plate 104 and the electronics circuit 105 is sequentially arranged in the carbon film 102 away from the surface of photocathode 30
On.
It is arranged such, the reading circuit plate 104 can induce the electric current of the formation of secondary electron, and induced-current passes through institute
State electronics circuit 105 and digitized processing, the energy and strength information with regard to incident ray can be obtained such as amplify, screen.
In some embodiments, the shell of the resistive plate room 10 is seal box 106, in the seal box 106 and institute
State and be provided with sealed insulation block 107 between first electrode glass 101a, so set and may be such that resistive plate room 10 for one completely
The cavity of sealing, the working gas leakage in resistive plate room 10 can be prevented, so as to influence the service behaviour of ray detector.
Dielectric film 102, such as Mylar films are set between the carbon film 102 and the reading circuit plate 104, can be kept away
Exempt from the reading circuit plate 104 and high pressure directly contacts, prevent that the reading circuit plate 104 from being destroyed.
The detector concrete operating principle is：The working gas is sealed in the resistive plate room 10, the resistance
The first electrode glass 101a and the second electrode glass 101b in property plate room 10 is arranged in parallel.The carbon film
102 and the photocathode 30 on add positive or negative high voltage respectively, in the presence of high pressure, the gas compartment shape in the detector
The electric field stronger into one, the field strength in gas can reach 104More than V/cm.People is when body is checked, from tissue
The ray that organ is sent is got on the scintillator 20 of detector, and the scintillator 20 is excited to send visible ray, it is seen that light exists
Electronics is got on the photocathode 30, electronics accelerates to obtain sufficiently high energy, electrons and gas under forceful electric power field action
Molecular action ionizes out secondary electron.In the presence of electric field, the secondary electron ionized out forms snowslide, an electricity in gas
Son can produce 107-108Individual secondary electron, secondary electron sense to meeting during anode movement on the reading circuit plate 104
Go out electric current, the digitized processings such as induced-current is amplified by the electronics circuit 105, screened, so as to obtain the energy of incident ray
Amount and strength information.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation
The description of mode ", " example ", " specific example " or " some examples " etc. means with reference to the embodiment or example description
Specific features, structure, material or feature are contained at least one embodiment or example of the present invention.In this specification
In, identical embodiment or example are not necessarily referring to the schematic representation of above-mentioned term.Moreover, the specific spy of description
Sign, structure, material or feature can combine in an appropriate manner in any one or more embodiments or example.
While embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that：
These embodiments can be carried out with a variety of changes, modification in the case of not departing from the principle and objective of the present invention, replace and become
Type, the scope of the present invention are limited by claim and its equivalent.
Claims (3)
1. a kind of ray detector, it is characterised in that including resistive plate room, scintillator and photocathode, the resistive plate room includes
First electrode glass, the photocathode is on the first electrode glass；The scintillator is outside the resistive plate room
Portion, the scintillator are arranged on the first electrode glass.
2. ray detector as claimed in claim 1, it is characterised in that the photocathode is located at resistive plate chamber interior, and
Contacted with the first electrode glass surface.
3. ray detector as claimed in claim 1, it is characterised in that the resistive plate room also include second electrode glass and
Carbon film, the second electrode glass are located at the resistive plate chamber interior, the second electrode glass and the first electrode glass
It is parallel to each other, the carbon film is on the surface of the second electrode glass away from the photocathode, the carbon film and described
Photocathode is respectively added with the generating positive and negative voltage more than 1000V, under the first electrode glass and the second electrode glass normal temperature
Resistivity be more than 1012Ω.cm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510188484.1A CN104793229B (en) | 2015-04-20 | 2015-04-20 | Ray detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510188484.1A CN104793229B (en) | 2015-04-20 | 2015-04-20 | Ray detector |
Publications (2)
| Publication Number | Publication Date |
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| CN104793229A CN104793229A (en) | 2015-07-22 |
| CN104793229B true CN104793229B (en) | 2018-01-16 |
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| CN201510188484.1A Active CN104793229B (en) | 2015-04-20 | 2015-04-20 | Ray detector |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301625A (en) * | 2015-11-09 | 2016-02-03 | 清华大学 | Fast time response ray detector |
| CN113640851A (en) * | 2021-06-24 | 2021-11-12 | 清华大学 | Resistive plate cell detector sensitive to gamma photons |
| CN113433580B (en) * | 2021-06-25 | 2023-03-10 | 中国科学技术大学 | Gas detector manufacturing method, gas detector and ray detection device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204731420U (en) * | 2015-04-20 | 2015-10-28 | 清华大学 | Ray detector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3104696B2 (en) * | 1998-12-21 | 2000-10-30 | 日立金属株式会社 | Radiation detector and radiation CT apparatus using the same |
| JP2015017956A (en) * | 2013-07-12 | 2015-01-29 | 東芝電子管デバイス株式会社 | Radiation detector |
| CN103941277B (en) * | 2014-05-07 | 2016-06-15 | 清华大学 | A kind of novel resistive plate room detector |
| CN104375160A (en) * | 2014-11-20 | 2015-02-25 | 常州市浩峰灯具厂 | Scintillation counter |
| CN104483699B (en) * | 2014-12-31 | 2017-12-19 | 清华大学 | Resistive plate room detector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204731420U (en) * | 2015-04-20 | 2015-10-28 | 清华大学 | Ray detector |
Non-Patent Citations (3)
| Title |
|---|
| NINO: an ultra-fast and low-power front-end amplifier/discriminator ASIC designed for the multigap resistive plate chamber;F. Anghinolfi et al.;《Nuclear Instruments and Methods in Physics Research A》;20040728(第533期);第183-187页 * |
| Production and quality control of STAR-TOF MRPC;Yi Wang et al.;《Nuclear Instruments and Methods in Physics Research A》;20091127(第613期);第200-206页 * |
| The construction of the BESIII experiment;BESIII Collaboration;《Nuclear Instruments and Methods in Physics Research A》;20080823(第598期);第7-11页 * |
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Address after: 100084 Haidian District 100084-82 mailbox Beijing Applicant after: Tsinghua University Applicant after: HEBEI TIANDI WISDOM MEDICAL EQUIPMENT CO., LTD. Address before: 100084 Haidian District 100084-82 mailbox Beijing Applicant before: Tsinghua University Applicant before: The world, Hebei intelligent medical treatment equipment company limited |
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