CN110967722B - Particle position detection device, system and method based on scintillator coding - Google Patents
Particle position detection device, system and method based on scintillator coding Download PDFInfo
- Publication number
- CN110967722B CN110967722B CN201911182556.6A CN201911182556A CN110967722B CN 110967722 B CN110967722 B CN 110967722B CN 201911182556 A CN201911182556 A CN 201911182556A CN 110967722 B CN110967722 B CN 110967722B
- Authority
- CN
- China
- Prior art keywords
- scintillator
- photoelectric conversion
- particle
- module
- particles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000002245 particle Substances 0.000 title claims abstract description 134
- 238000001514 detection method Methods 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title description 5
- 238000006243 chemical reaction Methods 0.000 claims abstract description 119
- 239000013307 optical fiber Substances 0.000 claims abstract description 55
- 230000003287 optical effect Effects 0.000 claims abstract description 22
- 238000005259 measurement Methods 0.000 claims abstract description 21
- 230000003321 amplification Effects 0.000 claims description 10
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 5
- 239000002356 single layer Substances 0.000 claims description 5
- 239000010410 layer Substances 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 2
- 238000002474 experimental method Methods 0.000 abstract description 4
- RFVFQQWKPSOBED-PSXMRANNSA-N 1-myristoyl-2-palmitoyl-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)O[C@@H](COP([O-])(=O)OCC[N+](C)(C)C)COC(=O)CCCCCCCCCCCCC RFVFQQWKPSOBED-PSXMRANNSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000009206 nuclear medicine Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- G01T1/20—Measuring radiation intensity with scintillation detectors
-
- 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
- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/2018—Scintillation-photodiode combinations
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measurement Of Radiation (AREA)
Abstract
The invention relates to a particle position detection device, a particle position detection system and a particle position detection method based on a scintillator, belongs to the technical field of particle detection, and solves the problem of excessive photoelectric conversion devices and electronic channels; the device comprises a scintillator module, an optical fiber, a photoelectric conversion module and an electronics module, wherein the scintillator module comprises a plurality of scintillators, and each scintillator is provided with an N-bit binary code for marking the position of an arranged region; one end face of the scintillator is connected with the photoelectric conversion module through the optical fiber; the photoelectric conversion module comprises N photoelectric conversion devices for numbering positions, and when a certain scintillator generates an optical signal, the photoelectric conversion module outputs N channels of electric signals corresponding to binary codes of the scintillator; the electronic module collects N channel electric signals, carries out electronic measurement, identifies the codes of the scintillators hit by the particles, and obtains the positions of the particles passing through the detection area. The invention reduces the number of photoelectric conversion devices and electronic channels and greatly reduces the experiment cost.
Description
This study was funded by the national science foundation (project approval number: 11605220).
Technical Field
The invention relates to the technical field of particle detection, in particular to a particle position detection device, a particle position detection system and a particle position detection method based on a scintillator.
Background
At present, the scintillation detector widely applied to high-energy particle detection, nuclear medicine and celestial body physics is provided, a detector module generally comprises a scintillator, a photoelectric conversion device and an electronic channel which are matched with the scintillator, the required number of the scintillators is large for occasions with large detection area and low particle counting rate, the requirements of the photoelectric conversion device and the electronic channel which are matched with the scintillators are more, and only one scintillator works with the photoelectric conversion device and the electronic channel which are matched with the scintillator at a detection time point due to low particle counting rate, so that a large number of photoelectric conversion devices and electronic channels are idle, resources are wasted, and the cost of a test system is increased.
Disclosure of Invention
In view of the above analysis, the present invention aims to provide a device, a system and a method for detecting the position of a particle based on a scintillator, which can reduce the number of photoelectric conversion devices and electronic channels and reduce the cost of a test system in the situations of large detection area and low particle counting rate.
The purpose of the invention is mainly realized by the following technical scheme:
the invention discloses a particle position detection device based on a scintillator, which comprises a scintillator module, an optical fiber, a first photoelectric conversion module and a first electronics module, wherein the optical fiber is arranged on the scintillator module;
the scintillator module includes a plurality of scintillators arranged in a single layer within a detection region for generating a light signal when hit by a particle; each scintillator has a separate N-bit binary code for marking the location of the region at which it is disposed;
the optical fiber is used for connecting one end face of the scintillator with the first photoelectric conversion module and transmitting an optical signal emitted by the end face to the first photoelectric conversion module;
the first photoelectric conversion module comprises N photoelectric conversion devices for numbering positions and is used for performing photoelectric conversion and signal amplification on the optical signal; when a certain scintillator generates an optical signal, the first photoelectric conversion module outputs electrical signals of N channels corresponding to binary codes of the scintillator;
and the first electronics module is used for collecting the electric signals, carrying out electronic measurement, identifying the codes of the scintillators hit by the particles and obtaining the positions of the particles passing through the detection region.
Furthermore, the scintillator is an organic or inorganic scintillator, is in a strip or block shape, has a polished surface, and is externally wrapped by a reflecting film; when particles pass through the scintillator, the scintillator generates a large amount of fluorescence, the fluorescence enters the optical fiber through the end face of the scintillator, and the fluorescence meeting the total reflection angle passes through the optical fiber in a total radiation mode.
Further, the fiber model is matched with the wavelength range of the fluorescence, and the length of each fiber is equal.
Further, the first electronics module judges whether each channel contains an effective signal according to the collected time and charge information of the electric signal; if yes, setting the output value of the channel to be 1; if not, the output value of the channel is set to 0.
Further, determining the number of optical fibers led out from one end face of each scintillator according to the number of '1' or '0' in each scintillator binary code; and connecting the led optical fiber with the photoelectric conversion device at the corresponding position according to the position of 1 or 0.
Further, when the connection of the scintillators to the photoelectric conversion devices is performed according to "1" in each scintillator binary code, the number of the scintillators is not more than 2NThe (N +1) corresponding binary codes do not include codes containing only one "1" and codes all of which are "0".
Further, when the connection of the scintillators to the photoelectric conversion devices is performed in accordance with "0" in each scintillator binary code, the number of the scintillators is not more than 2NThe (N +1) corresponding binary codes do not include codes containing only one "0" and codes all of which are "1".
Further, the photoelectric conversion module also comprises a second photoelectric conversion module and a second electronic module;
the second photoelectric conversion module is connected with the end surface opposite to the end surface of the scintillator connected with the first photoelectric conversion module through an optical fiber; receiving an optical signal emitted from the end face;
the second photoelectric conversion module comprises N photoelectric conversion devices which are the same as the first photoelectric conversion module and are used for numbering positions, and the photoelectric conversion devices are used for performing photoelectric conversion and signal amplification on the optical signals; when a certain scintillator generates an optical signal, the second photoelectric conversion module outputs electrical signals of N channels corresponding to binary codes of the scintillator;
the second electronic module has the same structure as the first electronic module and is used for collecting the N channel electric signals, carrying out electronic measurement, identifying the code of the scintillator hit by the particles and obtaining the position of the particles passing through the detection region;
and recording the time difference of the first and second electronic modules for carrying out electronic measurement on the same particle, and determining the radial position of the particle passing through the scintillator according to the time difference information to obtain the two-dimensional coordinates of the particle passing through the detection region.
The invention also discloses a particle position detection system, wherein the particle position detection devices are arranged in parallel multi-layer planes in the detection area;
each particle position detection device is used for detecting two-dimensional coordinates of particles entering the arrangement plane of the particle position detection device, and the two-dimensional coordinates detected by the particles passing through each particle position detection device are sequentially connected to form a track of the particles passing through the detection area.
The invention also provides a detection method using the particle position detection system, which comprises the following steps:
step S1, arranging the particle position detection system within a detection area;
step S2, when the single particle passes through the detection area, the single particle sequentially hits the scintillators which are subjected to binary coding in the particle position detection device arranged in the multilayer to generate light signals;
step S3, respectively carrying out photoelectric conversion and sum signal amplification on optical signals led out from the end faces of two opposite sides of the scintillator in a direction perpendicular to the arrangement direction of the scintillator to obtain electric signals corresponding to binary codes of two groups of scintillators;
step S4, carrying out electronic measurement on the electric signal, identifying the code of the scintillator hit by the particles, and obtaining the position coordinates of the scintillator passed by the particles in the arrangement direction; recording the time difference of the electronic measurement of the binary codes of the two groups of scintillators, and determining the radial position coordinate of the particle passing through the scintillators; obtaining the two-dimensional coordinates of the particles passing through the detection area;
and step S5, sequentially connecting the two-dimensional coordinates detected by the particle passing through each of the particle position detecting devices to form a track of the particle passing through the detection region.
The invention has the following beneficial effects:
the invention is suitable for the detection of particles under the conditions of large detection area and low particle counting rate (below kHz);
each scintillator is subjected to binary coding, and all scintillators share the photoelectric conversion device and the electronic channel, so that the number of the photoelectric conversion device and the electronic channel is effectively reduced, and the experiment cost is greatly reduced.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a schematic diagram of a particle position detecting apparatus according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a two-dimensional coordinate positioning particle position detecting apparatus according to a first embodiment of the present invention;
fig. 3 is a flowchart of a particle detection method according to a third embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the invention serve to explain the principles of the invention.
The first embodiment,
The embodiment discloses a particle position detection device based on a scintillator, which comprises a scintillator module, an optical fiber, a first photoelectric conversion module and a first electronics module, as shown in fig. 1;
the scintillator module includes a plurality of scintillators arranged in a single layer within a detection region for generating a light signal when hit by a particle; each scintillator has a separate N-bit binary code for marking the location of the region at which it is disposed;
the optical fiber is used for connecting one end face of the scintillator with the first photoelectric conversion module and transmitting an optical signal emitted by the end face to the first photoelectric conversion module;
the first photoelectric conversion module comprises N photoelectric conversion devices for numbering positions and is used for performing photoelectric conversion and signal amplification on the optical signal; when a certain scintillator generates an optical signal, the first photoelectric conversion module outputs electrical signals of N channels corresponding to binary codes of the scintillator;
and the first electronics module is used for collecting the electric signals, carrying out electronic measurement, identifying the codes of the scintillators hit by the particles and obtaining the positions of the particles passing through the detection region.
In this embodiment, the particle count rate is below kHz, which ensures that only a single particle passes through a scintillator in a single detection period, so that the scintillator generates fluorescence;
the scintillator can be an organic scintillator and an inorganic scintillator with high enough light yield, the scintillator is in a strip shape or a block shape according to the requirement of an actual detection area, the surface of the scintillator is polished, the end face of the connecting optical fiber is exposed, and the outside of the rest surface of the scintillator is wrapped by a reflecting film.
For example, a stripe-shaped scintillator is adopted, each scintillator is arranged in the x-axis (horizontal) direction, and a plurality of scintillators are uniformly arranged in the y-axis (vertical) direction of the detection region, covering the whole detection region.
The type of the optical fiber for connecting the end face of the scintillator and the photoelectric conversion device is matched with the wavelength range of the fluorescence, and the length of each optical fiber is equal, so that the interference of other noises can be eliminated through information such as signal time, charges and the like in the later period.
Specifically, when a particle passes through the scintillator, the scintillator generates a large amount of fluorescence, the fluorescence enters the optical fiber through the end face of the scintillator, and the fluorescence satisfying the angle of total reflection angle passes through the optical fiber in a total emission manner.
The optical fiber conducts the fluorescence to the surface of the photoelectric conversion device, the fluorescence generates photoelectric effect on the surface of the photoelectric conversion device, and photoelectric conversion and electric signal amplification are completed through the photoelectric conversion device.
In the assembly process of the device of the present embodiment, the dimensions or specifications of the components need to be determined by comprehensive consideration according to experimental requirements. For example, the scintillator end face (the face to which the optical fibers are connected) is 10mm by 10mm in size, and for an optical fiber having a diameter of 1mm, theoretically 100 optical fibers can be connected. If the size of the photosensitive area (the surface connected with the optical fiber) of the photoelectric conversion device is 3mm by 3mm, for the optical fiber with the diameter of 1mm, due to the size limitation of the photosensitive area of the photoelectric conversion device, a maximum of 9 optical fibers can be connected in the detector scheme. If the size of the photosensitive area (the surface connected with the optical fiber) of the photoelectric conversion device is 6mm by 6mm, for the optical fiber with the diameter of 1mm, a maximum of 36 optical fibers can be connected in the detector scheme due to the size limitation of the photosensitive area of the photoelectric conversion device. For scintillators with lower light yield, larger diameter fibers need to be chosen to ensure a sufficiently high detection efficiency (-100%) of the photoelectric conversion device. The user can select according to the requirement in practical application.
Since each scintillator has a separate N-bit binary code for marking the location of the region in which it is disposed; the number of the photoelectric conversion devices matched with the N photoelectric conversion devices is N, the N photoelectric conversion devices correspond to the binary code N bits,
when the optical fibers are connected with each scintillator, determining the number of the optical fibers led out from the end face of the scintillator according to the number of '1' in the binary code of each scintillator; and connecting the led optical fiber with the photoelectric conversion device at the corresponding position according to the position of the '1'. No more than 2 may be arranged in the detection areaN-1 scintillator;
taking 5 photoelectric conversion devices as an example, a scheme for connecting the scintillator and the photoelectric conversion devices through optical fibers is described. Corresponding to binary 5-bit number, 32 codes such as 00000-11111 can be provided. Specific connection methods are described below. For a certain scintillator, 01011 is encoded. If the 1 st, 2 nd and 4 th bits are 1, the optical fiber led out from one end face of the scintillator is connected with the 1 st, 2 nd and 4 th photoelectric conversion devices; the 3 rd and 5 th bits of the codes are 0, which indicates that the optical fiber led out from the end face of the scintillator is not connected with the 3 rd and 5 th photoelectric conversion devices. Where 00000 indicates that the photoelectric conversion device is not operated, the code is invalid. Therefore, the effective encoding number is 31 for 5 photoelectric conversion devices. By analogy, the effective coding number of 6 photoelectric conversion devices is 63; the effective coding number of the 7 photoelectric conversion devices can reach 127. The relation between the number of photoelectric conversion devices and the number of effective scintillators is 2N-1, where N is the number of photoelectric conversion devices. It can be seen that the number of photoelectric conversion devices can be greatly reduced.
The photoelectric conversion device generally has heatNoise, creating glitches. The generation time and signal amplitude (or charge) of the glitch have randomness compared to the true signal. By utilizing the information difference of time, charge or amplitude and the like of the true and false signals, the error probability of the test system can be effectively reduced. In order to reduce the error rate, the information of different photoelectric conversion devices can be conveniently compared, noise interference is eliminated, and codes only containing one '1' are removed. The number of codes is at most 2N- (N +1), i.e. the number of scintillators is not more than 2N- (N + 1).
Taking 5 photoelectric conversion devices as an example, the numbers (00001, 00010, 00100, 01000, 10000) of the connections of the single optical fiber and the photoelectric conversion devices are removed. Therefore, the effective encoding number is 26 for 5 photoelectric conversion devices. By analogy, the relation between the number of photoelectric conversion devices and the number of effective codes is 2N- (N +1) where N is the number of photoelectric conversion devices.
According to the same principle as the above, when the optical fiber is connected with each scintillator, the number of the optical fibers led out from the end face of the scintillator can be determined according to the number of '0' in the binary code of each scintillator; according to the position of '0', connecting the led-out optical fiber with the photoelectric conversion device at the corresponding position; in order to reduce the error rate, the information of different photoelectric conversion devices can be conveniently compared, noise interference is eliminated, and codes only containing one '0' and codes all containing '1' in the codes are removed. The number of codes is at most 2N- (N +1), i.e. the number of scintillators is not more than 2N- (N + 1).
In contrast to determining the number of optical fibers led out from the end face of the scintillator according to the number of '1', the first electronic module decodes and identifies the electric signal codes, and then takes the inverse code to determine the scintillator through which the particles pass.
And connecting all scintillators with the photoelectric conversion device and the electronic module by adopting the coding mode.
Still taking the scintillator module with the code 01011 as an example, when particles pass through the scintillator module, the generated fluorescence reaches the connected photoelectric conversion devices (numbers 1,2,4) through the optical fiber, and the photoelectric conversion devices amplify the signals; the first electronics module collects time and charge information of the electrical signals of the three channels. Since the fluorescence is generated from the same location area and the lengths of the optical fibers are substantially equal, the time (the time when a certain threshold is exceeded) for the electrical signals of the three channels is substantially the same. By comparing the information of the electric charges, the time and the like of different channels, noise interference is eliminated, and whether effective signals are contained in each channel is judged; if yes, the channel is set to 1; no, then the channel is set to 0. Therefore, the scintillator module code (01011) hit by the particle can be obtained, and the position information of the scintillator module in the y-axis direction can be derived. By analogy, 7 photoelectric conversion devices are used, the single-ended detection requirement of more than 100 scintillator modules can be met, the number of the photoelectric conversion devices and electronics is greatly reduced, and the experiment cost is effectively reduced.
Preferably, the photoelectric conversion device may be a photomultiplier tube PMT or a silicon photodiode MPPC that satisfies weak light (single photoelectron) detection conditions. The PMT usually has larger gain, does not need a preamplifier and is directly input into a back-end electronic measurement; the MPPC gain is small, a front amplifier is needed, the signal is further amplified, and the signal is input into a rear-end electronic measurement. In addition, the MPPC dark noise is higher than PMT, and the error rate is also correspondingly larger.
Preferably, the electronics module may be an electronics chassis containing a multi-channel time and charge measurement card, which may directly obtain information about the signal; or a multi-channel acquisition instrument based on waveform sampling obtains corresponding information of signals by analyzing acquired data by adopting off-line software.
Specially, the parts of scintillator, optical fiber, photoelectric converter, etc. need to be wrapped with light-shielding material for light-shielding treatment
In addition, the end face size of the scintillator, the specification of the optical fiber, and the size of the photosensitive region (the end face for connecting the optical fiber) of the photoelectric conversion device need to be selected correspondingly in combination with the experimental detection requirements. When more than 3 photoelectrons are led into the photoelectric conversion device from a single optical fiber, the detection efficiency of the channel is 100% due to the high sensitivity of the photoelectric conversion device.
The present embodiment may also enable two-dimensional coordinate positioning of particles passing through the detection region.
Specifically, in order to realize two-dimensional coordinate positioning, as shown in fig. 2, the present embodiment further includes a second photoelectric conversion module and a second electronics module;
the second photoelectric conversion module is connected with the end surface opposite to the end surface of the scintillator connected with the first photoelectric conversion module through an optical fiber; receiving an optical signal emitted by the end face;
in order to obtain two-dimensional coordinates, it is preferable that the two opposing end faces are located in a direction perpendicular to the scintillator arrangement direction;
for example, if the strip-shaped scintillators are uniformly distributed on the inner plane of the single-layer detection region, the first photoelectric conversion module and the second photoelectric conversion module are respectively connected by optical fibers, and the two opposite side end surfaces of the strip-shaped scintillators perpendicular to the arrangement direction are provided.
The second photoelectric conversion module comprises N photoelectric conversion devices which are the same as the first photoelectric conversion module and are used for numbering positions, and the photoelectric conversion devices are used for performing photoelectric conversion and signal amplification on the optical signals; when a certain scintillator generates an optical signal, the second photoelectric conversion module outputs electrical signals of N channels corresponding to binary codes of the scintillator;
the second electronic module has the same structure as the first electronic module and is used for collecting the N channel electric signals, carrying out electronic measurement, identifying the code of the scintillator hit by the particles and obtaining the position of the particles passing through the detection region; i.e., position information in the y-axis direction;
due to the different positions of the particles through the scintillator, different time information is obtained in the resulting electronic measurements of the same particle across the scintillator. And recording the time difference of the first and second electronic modules for electronically measuring the same particle, and determining the radial position of the particle passing through the scintillator, namely the position information in the x-axis direction according to the time difference information to obtain the two-dimensional coordinate of the particle passing through the detection region. The radial position accuracy depends mainly on the time measurement accuracy of the photoelectric conversion device and electronics.
In summary, the two-dimensional measurement of particles is realized by using a single-layer scintillator arrangement, connecting optical fibers and photoelectric devices at two ends of the scintillator, and electronics, and comprehensively using time and charge information of each channel.
In the embodiment, all scintillators share the photoelectric conversion device and the electronic channel, so that the number of the photoelectric conversion device and the electronic channel is effectively reduced, and the experiment cost is greatly reduced.
Example II,
The embodiment discloses a particle position detection system, in particular to a particle position detection device as described in the first embodiment which is arranged in parallel multi-layer planes in a detection area; each particle position detection device is used for detecting two-dimensional coordinates of particles entering the arrangement plane of the particle position detection device, and the two-dimensional coordinates detected by the particles passing through each particle position detection device are sequentially connected to form a track of the particles passing through the detection area.
The particle position detection means are arranged, for example, at the entrance face and the exit face of the particles, respectively, in the detection region.
The particle position detection device is arranged on the incident surface and is used for detecting incident two-dimensional coordinates of the particles entering the detection area; particle position detection means arranged at said exit face for detecting exit two-dimensional coordinates of particles leaving the detection area; and connecting the incident two-dimensional coordinate and the emergent two-dimensional coordinate to form a track of the particles passing through the detection area.
It should be noted that the above embodiments are based on the same inventive concept, and the description is not repeated, so that they can be referred to each other.
Compared with the prior art, the beneficial effects of the particle position detection system provided by the embodiment are basically the same as those provided by the first embodiment, and are not repeated herein.
Example III,
The present embodiment discloses a detection method using the particle position detection system according to the second embodiment, as shown in fig. 3, including the following steps:
step S1, arranging the particle position detection system within a detection area;
step S2, when the single particle passes through the detection area, the single particle sequentially hits the scintillators which are subjected to binary coding in the particle position detection device arranged in the multilayer to generate light signals;
step S3, respectively carrying out photoelectric conversion and sum signal amplification on optical signals led out from the end faces of two opposite sides of the scintillator in a direction perpendicular to the arrangement direction of the scintillator to obtain two groups of electric signals corresponding to binary codes of the scintillator;
step S4, carrying out electronic measurement on the electric signal, identifying the code of the scintillator hit by the particles, and obtaining the position coordinates of the scintillator passed by the particles in the arrangement direction, namely the position information of the y-axis direction; recording the time difference of electronic measurement of binary codes of the two groups of scintillators, and determining the radial position coordinate of the particle passing through the scintillators, namely the position information in the x-axis direction; obtaining the two-dimensional coordinates of the particles passing through the detection area;
and step S5, sequentially connecting the two-dimensional coordinates detected by the particle passing through each of the particle position detecting devices to form a track of the particle passing through the detection region.
It should be noted that the above embodiments are based on the same inventive concept, and the description is not repeated, so that they can be referred to each other.
Compared with the prior art, the beneficial effects of the particle position detection system provided by the embodiment are basically the same as those provided by the first embodiment, and are not repeated herein.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (7)
1. A particle position detection device based on scintillator coding is characterized by comprising a scintillator module, an optical fiber, a first photoelectric conversion module and a first electronics module;
the scintillator module includes a plurality of scintillators arranged in a single layer within a detection region for generating a light signal when hit by a particle; each scintillator has a separate N-bit binary code for marking the location of the region at which it is disposed;
the optical fiber is used for connecting one end face of the scintillator with the first photoelectric conversion module and transmitting an optical signal emitted by the end face to the first photoelectric conversion module;
the first photoelectric conversion module comprises N photoelectric conversion devices for numbering positions and is used for performing photoelectric conversion and signal amplification on the optical signal; when a certain scintillator generates an optical signal, the first photoelectric conversion module outputs electrical signals of N channels corresponding to binary codes of the scintillator;
the first electronics module is used for collecting the electric signals, performing electronic measurement, identifying the codes of the scintillators hit by the particles and obtaining the positions of the particles passing through the detection area;
determining the number of optical fibers led out from one end face of each scintillator according to the number of '1' in each scintillator binary code; according to the position of '1', connecting the led-out optical fiber with the photoelectric conversion device at the corresponding position;
when the connection of the scintillators to the photoelectric conversion device is performed according to "1" in each scintillator binary code, the number of the scintillators is not more than 2NThe (N +1) corresponding binary codes do not include codes containing only one "1" and codes all of which are "0".
2. The particle position detecting device according to claim 1, wherein the scintillator is an organic or inorganic scintillator, has a strip or block shape, is surface-polished, has an exposed end face of the connecting optical fiber, and has a reflective film coated on the outside of the remaining surface; when particles pass through the scintillator, the scintillator generates a large amount of fluorescence, the fluorescence enters the optical fiber through the end face of the scintillator, and the fluorescence meeting the total reflection angle passes through the optical fiber in a total radiation mode.
3. The particle position detecting device of claim 2, wherein the fiber type is matched to the wavelength range of the fluorescence, and each fiber has an equal length.
4. The apparatus according to claim 1, wherein the first electronics module determines whether each channel contains a valid signal according to the time and charge information of the collected electrical signal; if yes, setting the output value of the channel to be 1; if not, the output value of the channel is set to 0;
and identifying and obtaining the code of the scintillator hit by the particles through the N channel output values.
5. The particle position detecting device according to any of claims 1-4, further comprising a second photoelectric conversion module, a second electronics module;
the second photoelectric conversion module is connected with the end surface opposite to the end surface of the scintillator connected with the first photoelectric conversion module through an optical fiber; receiving an optical signal emitted from the end face;
the second photoelectric conversion module comprises N photoelectric conversion devices which are the same as the first photoelectric conversion module and are used for numbering positions, and the photoelectric conversion devices are used for performing photoelectric conversion and signal amplification on the optical signals; when a certain scintillator generates an optical signal, the second photoelectric conversion module outputs electrical signals of N channels corresponding to binary codes of the scintillator;
the second electronic module has the same structure as the first electronic module and is used for collecting the N channel electric signals, carrying out electronic measurement, identifying the code of the scintillator hit by the particles and obtaining the position of the particles passing through the detection region;
and recording the time difference of the first and second electronic modules for carrying out electronic measurement on the same particle, and determining the radial position of the particle passing through the scintillator according to the time difference information to obtain the two-dimensional coordinates of the particle passing through the detection region.
6. A particle position detection system, characterized in that the particle position detection means of claim 5 are arranged in parallel multi-layer planes in the detection region;
each particle position detection device is used for detecting two-dimensional coordinates of particles entering the arrangement plane of the particle position detection device, and the two-dimensional coordinates detected by the particles passing through each particle position detection device are sequentially connected to form a track of the particles passing through the detection area.
7. A detection method using the particle position detection system according to claim 6, comprising the steps of:
step S1, arranging the particle position detection system within a detection area;
step S2, when a single particle passes through the detection area, the single particle hits the scintillator which is binary coded in the particle position detection device and arranged in multiple layers, and light signals are generated;
step S3, respectively carrying out photoelectric conversion and signal amplification on optical signals led out from the scintillators through the end faces of the two opposite sides vertical to the arrangement direction of the scintillators to obtain electric signals corresponding to binary codes of the two groups of scintillators;
step S4, carrying out electronic measurement on the electric signal, identifying the code of the scintillator hit by the particles, and obtaining the position coordinates of the scintillator passed by the particles in the arrangement direction; recording the time difference of the electronic measurement of the binary codes of the two groups of scintillators, and determining the radial position coordinate of the particle passing through the scintillators; obtaining the two-dimensional coordinates of the particles passing through the detection area;
and step S5, sequentially connecting the two-dimensional coordinates detected by the particle passing through each of the particle position detecting devices to form a track of the particle passing through the detection region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911182556.6A CN110967722B (en) | 2019-11-27 | 2019-11-27 | Particle position detection device, system and method based on scintillator coding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911182556.6A CN110967722B (en) | 2019-11-27 | 2019-11-27 | Particle position detection device, system and method based on scintillator coding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110967722A CN110967722A (en) | 2020-04-07 |
| CN110967722B true CN110967722B (en) | 2022-02-15 |
Family
ID=70031815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911182556.6A Expired - Fee Related CN110967722B (en) | 2019-11-27 | 2019-11-27 | Particle position detection device, system and method based on scintillator coding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110967722B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113114277B (en) * | 2021-04-13 | 2022-10-28 | 中国科学技术大学 | Gas detector coding processing method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1867833A (en) * | 2003-08-13 | 2006-11-22 | 伊林诺瓦公司 | Position detecting device |
| CN102288982A (en) * | 2011-05-17 | 2011-12-21 | 中国科学院高能物理研究所 | Scintillator-based two-dimensional position detection system |
| CN102565840A (en) * | 2012-02-06 | 2012-07-11 | 清华大学 | Scintillation detector |
| CN107728188A (en) * | 2017-10-09 | 2018-02-23 | 山东麦德盈华科技有限公司 | It is a kind of to be used for ray position and the detector and signal reading method of energy measurement |
| CN109498044A (en) * | 2018-10-15 | 2019-03-22 | 华中科技大学 | A kind of PET annular detection imaging system based on flash fiber |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839992B (en) * | 2010-05-06 | 2013-11-06 | 清华大学 | Photosensitive device inclined arrangement type high energy ray detector |
| EP2629118A3 (en) * | 2012-02-15 | 2017-09-06 | CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement | High-sensitivity x-ray detector |
| CN104090293B (en) * | 2014-06-19 | 2016-08-31 | 西北核技术研究所 | Based on the fiber array neutron position sensitive detection system and the method that postpone coding |
-
2019
- 2019-11-27 CN CN201911182556.6A patent/CN110967722B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1867833A (en) * | 2003-08-13 | 2006-11-22 | 伊林诺瓦公司 | Position detecting device |
| CN102288982A (en) * | 2011-05-17 | 2011-12-21 | 中国科学院高能物理研究所 | Scintillator-based two-dimensional position detection system |
| CN102565840A (en) * | 2012-02-06 | 2012-07-11 | 清华大学 | Scintillation detector |
| CN107728188A (en) * | 2017-10-09 | 2018-02-23 | 山东麦德盈华科技有限公司 | It is a kind of to be used for ray position and the detector and signal reading method of energy measurement |
| CN109498044A (en) * | 2018-10-15 | 2019-03-22 | 华中科技大学 | A kind of PET annular detection imaging system based on flash fiber |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110967722A (en) | 2020-04-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6989541B2 (en) | Coincident neutron detector for providing energy and directional information | |
| US7709801B2 (en) | Nuclear medicine diagnosis equipment | |
| US7288771B2 (en) | Fiber optic thermal/fast neutron and gamma ray scintillation detector | |
| JP4766407B2 (en) | Radiation dosimeter and radiation dose calculation program | |
| JP4313895B2 (en) | Radiation detector | |
| US8466418B2 (en) | Gamma ray detector, radiation diagnostic device, tomography device, and method of analyzing tomography device | |
| JP3532942B2 (en) | Radiation position detector | |
| US20050082485A1 (en) | Direction sensitive detector of radiation | |
| US8624195B2 (en) | Neutron detector attachment device | |
| JPH10232284A (en) | Wavelength shift type radiation sensor and radiation detector | |
| CN1971652A (en) | Method and apparatus for processing of detector signals | |
| JP2008026195A (en) | Apparatus of measuring neutron intensity distribution | |
| US6153882A (en) | Method and system for reading a data signal emitted by an active pixel in a sensor | |
| CN110967722B (en) | Particle position detection device, system and method based on scintillator coding | |
| JPH10288671A (en) | Position detection type radiation detection device | |
| JP3813656B2 (en) | Optical fiber type large area radiation monitor | |
| JP2000147125A (en) | Radiation detector and computer-readable recording medium | |
| CN211375074U (en) | Particle detection device and system based on scintillator | |
| JP2008122088A (en) | Radioactivity measuring device | |
| CN111596337A (en) | Tritium detection method in high radon environment based on scintillation fiber array | |
| CN109470722A (en) | Autoradiograph device | |
| Loyd et al. | Scintillator-based detectors | |
| JP2012242369A (en) | Radiation detector | |
| JP5060410B2 (en) | Radiation detector | |
| CN115420226B (en) | Pulse width-based ray action position positioning device and positioning method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220215 |