CN211786135U

CN211786135U - Position sensitive detection device for enlarging detection visual field

Info

Publication number: CN211786135U
Application number: CN202020228279.XU
Authority: CN
Inventors: 张岚
Original assignee: Beijing Lanthanum Technology Co ltd
Current assignee: Beijing Lanthanum Technology Co ltd
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-10-27
Anticipated expiration: 2030-02-28

Abstract

The utility model relates to an enlarge sensitive detection device in position of surveying the field of vision, include: a face array of readout electronics units having a plurality of coupled crystals or gas detectors coupled thereto. The utility model provides a detection device utilizes the coupling crystal of slope, has expanded the directional field of vision scope of ray source, and through the length of adjustment crystal, the efficiency of improvement detector improves the detectable ray energy scope simultaneously to when having realized extension ray incident direction field of vision function, promote detection efficiency, the faster ability that provides real-time test data.

Description

Position sensitive detection device for enlarging detection visual field

Technical Field

The utility model relates to a radiation detection and radiation imaging technical field especially relate to a enlarge sensitive detection device in position who surveys the field of vision.

Background

In the fields of nuclear power, nuclear medicine, full-flow treatment of nuclear materials and the like, radioactive materials need to be detected, radioactive doses in monitored environments need to be tested, the category names of radioactive nuclides are identified, and energy spectrum detection of nuclides is carried out. There is a further need to understand the three-dimensional distribution of radionuclides in the environment.

On the basis of dose and nuclide identification, a gamma camera based on NaI scintillator is commonly used as a system capable of providing radionuclide distribution information. The structure of the system is a coding plate, and a PD or SiPM array of a scintillation plate coupling surface array is added. The advantage is that radiation source distribution information can be given. The disadvantage is that only about 40 degree angle of radiation source distribution can be provided, and the actual requirement is 360 degree panoramic distribution, and at this time, a plurality of gamma cameras are spliced or rotated in two dimensions to obtain the panoramic radiation source distribution information. Another disadvantage is that the radiation energy can only reach up to 1.5Mev, which does not reach the conventional 3Mev detection range.

Another device for providing three-dimensional information of the ray source is a Compton camera based on a CdZnTe detector. Besides providing dose and nuclide identification information, the system can provide ray source distribution information within a 360-degree panoramic range by utilizing the three-dimensional position sensitivity function of the CZT detector and the Compton scattering principle without rotation and splicing. The system has the defects that CZT crystals are expensive, a detection system is complex, data processing is complex, so that the common CZT system is small in size, the detection efficiency is low, and the reaction speed of real-time monitoring is limited.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the current detection system structure detection inefficiency, survey the narrow problem of field of vision scope, the technical scheme who adopts is: a position sensitive detection device for enlarging a detection field of view, comprising: a face array of readout electronics units having a plurality of coupled crystals or gas detectors coupled thereto.

In a further refinement, the coupling crystal or gas detector is perpendicular or inclined to the array plane of the readout electronics unit.

In a further improvement, a ray blocking part is arranged between two adjacent coupling crystals or two gas detectors.

In a further improvement, the ray barrier is any one of lead, tungsten, iron and aluminum.

In a further improvement, the top surface of the coupling crystal or the gas detector is provided with an encoding plate.

In a further improvement, the coding plate is a flat plate or an arc-shaped plate.

In a further development, the readout electronics unit is a PD or SiPM area array containing light-sensitive detectors.

In a further improvement, the PD or SiPM surface array is surface-coupled with a scintillation crystal.

In a further development, the readout electronics unit is an area array electrode for reading out charge signals.

In a further improvement, the area array electrode is coupled with a semiconductor crystal or a gas detector.

The utility model has the advantages that:

the utility model provides a enlarge sensitive detection device in position of surveying the field of vision through special structural design, utilizes the coupling crystal of slope, has expanded the directional field of vision scope of ray source, from the field of vision angle about original 40 degrees, expands to being close 180 degrees. Meanwhile, the length of the crystal is adjusted, so that the efficiency of the detector is improved, and the energy range of the detectable rays is improved. Therefore, the function of expanding the visual field in the incident direction of the ray is realized, the detection efficiency is improved, and the capability of providing real-time test data is improved more quickly.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic diagram of the structure of the readout electronics unit of the present invention;

fig. 2 is a schematic structural diagram of the detecting device of the present invention;

fig. 3 is a schematic structural diagram of the detecting device of the present invention;

fig. 4 is a schematic structural diagram of the detecting device of the present invention;

fig. 5 is a schematic diagram of a coupled crystal structure of the present invention;

fig. 6 is a schematic structural diagram of the ray blocking member of the present invention;

fig. 7 is a schematic structural diagram of the coding plate of the present invention;

fig. 8 is a schematic structural diagram of the coding plate of the present invention;

fig. 9 is a schematic structural view of two detection devices of the present invention arranged in a back direction;

fig. 10 is a schematic structural view of two detection devices of the present invention disposed in a back direction;

fig. 11 is a schematic structural view of two detection devices of the present invention arranged in a back direction;

fig. 12 is a schematic diagram of a coupled crystal structure of the present invention.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, detachable connections, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the utility model can be understood according to specific situations by those skilled in the art.

As shown in fig. 1 to 11, the utility model provides a position sensitive detection device for enlarging detection visual field, which comprises: an area array of read-out electronics units 1, to which read-out electronics units 1 a plurality of coupled crystals or gas detectors 2 are coupled.

In a further development, the coupling crystal or gas detector 2 is perpendicular or inclined to the array plane of the readout electronics unit 1.

In a further improvement, a ray barrier 3 is arranged between two adjacent coupling crystals or two gas detectors 2.

In a further improvement, the ray barrier 3 is any one of lead, tungsten, iron and aluminum.

In a further improvement, the top surface of the coupling crystal or gas detector 2 is provided with an encoding plate 4.

In a further improvement, the coding plate 4 is a flat plate or an arc-shaped plate.

In a further improvement, the readout electronics unit 1 is a surface array, such as PD or SiPM, with light sensitive detection.

In a further development, the readout electronics unit 1 is an area array electrode from which charge signals can be read directly.

The utility model discloses the purpose is when satisfying high detection efficiency requirement, realizes the extension in ray source location field of vision, the promotion of detection efficiency, the increase of test energy scope.

As shown in fig. 1, the first is a plane array readout electronics system, a front-end readout system including a plane array such as PD or SiPM for light sensitive detection, or a plane array electrode capable of directly receiving a charge signal.

Coupling scintillation crystals on the surface of the area array PD or SiPM; or a semiconductor crystal or a gas detector is coupled on an area array electrode which can directly read the charge signal. The coupling crystals have a visual field range of A perpendicular to the plane of the area array plate (as shown in FIG. 2) or have a certain inclination angle (as shown in FIG. 3) and have a visual field range of B.

The inclined coupling crystal expands the directional visual field range of the ray source, and the length of the crystal is adjusted to improve the efficiency of the detector and improve the energy range of the detectable rays.

As shown in fig. 4, the scintillation crystal, or semiconductor material, or gas detector coupled to the area array readout system may be of the same height, with different directional detection efficiencies. Or the length of the probe may be the same, and the detection efficiency is the same in all directions.

The cross-section of the coupling crystal can be of different shapes, such as: round, square, rectangular, diamond or other shapes, etc.

The coupling crystal may have the same cross-sectional dimension along its length (as shown in fig. 12) or may vary, such as by increasing its cross-sectional dimension away from the readout electronics (as shown in fig. 5) to improve detection efficiency.

As shown in fig. 6, between all coupled scintillation crystals or semiconductor materials or gas detectors, a radiation blocking material, such as lead, tungsten, iron, aluminum, etc., is filled to isolate the radiation for radiation orientation.

And coding plates with different thicknesses can be placed on the top surface of the crystal, so that the directional judgment function of the ray is realized.

The coding plate may be a horizontal plate (as shown in fig. 7) or a ray blocking plate with a certain curvature (as shown in fig. 8) to meet the requirement of ray-oriented field of view expansion.

The system thus constructed, as shown in fig. 9-11, is placed in back-to-back opposition to achieve near 360 degree ray direction capability. Therefore, the scintillators or semiconductors facing to different directions can detect rays in different directions, and the acquisition of the distribution information of the ray source is realized.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A position sensitive detection device for enlarging a detection field of view, comprising: a face array of readout electronics units having a plurality of coupled crystals or gas detectors coupled thereto.

2. The detection apparatus according to claim 1, wherein the coupling crystal or gas detector is perpendicular or oblique to the array plane of the readout electronics unit.

3. The detection device according to claim 2, wherein a radiation barrier is arranged between two adjacent coupling crystals or two gas detectors.

4. A detection device according to claim 3, wherein the radiation barrier is any one of lead, tungsten, iron, aluminium.

5. The detection device of claim 2, wherein the top surface of the coupling crystal or gas detector is provided with an encoding plate.

6. The probe apparatus of claim 5, wherein the encoder plate is a flat plate or an arc plate.

7. A detector arrangement as claimed in claim 1, characterized in that the readout electronics unit is a PD or SiPM area array containing light-sensitive detectors.

8. The detection apparatus of claim 7, wherein the PD or SiPM planar array surface-coupled scintillation-type crystal.

9. A probe device according to claim 1 wherein the readout electronics is an area array electrode that reads charge signals.

10. The detection device of claim 9, wherein the area array electrode is coupled to a semiconductor crystal or gas detector.