Thermal neutron imaging detector based on TFT area array detector

Abstract

The utility model discloses a thermal neutron imaging detector based on a TFT area array detector, comprising a housing, a TFT substrate and a scintillator layer, the TFT substrate and the scintillator layer are both arranged in the housing, the TFT substrate comprises a substrate layer and an optical adhesive layer, the scintillator layer is arranged on the optical adhesive layer, and the scintillator layer is arranged on the substrate layer. The optical adhesive layer is matched with the scintillator layer to optimize optical signal transmission and improve imaging resolution; according to the TFT area array detector, the optical adhesive layer is arranged on the surface of the substrate layer of the TFT area array detector, and the optical adhesive layer is combined with the scintillator layer, so that optical signal transmission is optimized, and the imaging resolution is improved.

Description

Technical Field

[0001] This invention belongs to the field of thermal neutron imaging technology, specifically relating to a thermal neutron imaging detector based on a TFT array detector. Background Technology

[0002] Neutron imaging is a technique that uses neutron beams to penetrate objects and probe their internal structure. It is widely used in materials science, nuclear reactor monitoring, and medical imaging. Current techniques typically employ LiF (Li₂F₃) as the neutron beam. 6 The combination of 6LiF and ZnS(Ag) as scintillator materials is used to fabricate neutron detectors or thermal neutron imaging detectors. Currently, the commonly used scheme consists of 6LiF and ZnS(Ag) + optical readout modules (CCD, CMOS, photomultiplier tube). Since these optical readout modules have poor radiation resistance, refraction or reflection is often used to avoid damage to the optical readout modules caused by radiation, thus preventing the optical readout modules from being in the neutron path. However, this requires a larger detector space and results in low light collection efficiency and complex structure. In addition, the combination of scintillator materials and TFT substrates is complex, leading to high manufacturing difficulty and cost, and the imaging resolution is affected by the uniformity and thickness of the scintillator material. At the same time, electronic devices are easily damaged under neutron irradiation, affecting the stability and lifespan of the detector. Therefore, a new type of neutron imaging detector is needed, which improves imaging resolution and stability by combining scintillator materials with TFT substrates, while simplifying the manufacturing process and reducing costs. Utility Model Content

[0003] The purpose of this invention is to provide a thermal neutron imaging detector based on a TFT area array detector. By setting an optical adhesive layer on the surface of the substrate layer of the TFT area array detector and combining the optical adhesive layer with the scintillator layer, the optical signal transmission is optimized and the imaging resolution is improved.

[0004] This utility model is achieved through the following technical solution:

[0005] A thermal neutron imaging detector based on a TFT array detector includes a housing, a TFT substrate, and a scintillator layer. The TFT substrate and the scintillator layer are both disposed in the housing. The TFT substrate includes a substrate layer and an optical adhesive layer. The scintillator layer is disposed on the optical adhesive layer. The optical adhesive layer and the scintillator layer work together to optimize optical signal transmission and improve imaging resolution.

[0006] Furthermore, the thickness of the scintillator layer is 200μm-500μm.

[0007] Furthermore, the thickness of the optical adhesive layer is 2μm-5μm.

[0008] Furthermore, the pixel size of the substrate layer is 50μm to 200μm.

[0009] Furthermore, the housing is made of metal.

[0010] Furthermore, the housing is made of copper or stainless steel.

[0011] Furthermore, the thickness of the shell is 0.5-1mm.

[0012] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0013] 1) In this utility model, an optical adhesive layer is provided on the surface of the substrate layer of the TFT array detector, and the optical adhesive layer is combined with the scintillator layer to optimize the transmission of light signals and improve the imaging resolution.

[0014] 2) In this utility model, the detector has high stability. The protective layer structure set inside the shell can significantly improve the radiation resistance. Moreover, the manufacturing process is simple. The scintillator layer is covered by coating. The process steps are simple, the cost is low and it is easy to promote. It is suitable for large-area neutron imaging applications. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic cross-sectional view of the thermal neutron imaging detector of this invention.

[0017] Wherein: 1-shell, 2-substrate layer, 3-optical adhesive layer, 4-scintillator layer. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0019] Example 1:

[0020] A thermal neutron imaging detector based on a TFT array detector, such as Figure 1As shown, the detector includes a housing 1, a TFT substrate, and a scintillator layer 4. Both the TFT substrate and the scintillator layer 4 are disposed within the housing 1. The housing 1 is made of 1mm thick stainless steel, which can shield the detector from light and also shield external X-rays and gamma rays, reducing radiation interference. The TFT substrate includes a substrate layer 2 and an optical adhesive layer 3. The substrate layer 2 has a radiation resistance greater than 6000Gy. The scintillator layer 4 is preferably made of 6LiF (lithium fluoride 6) and ZnS(Ag) (silver-activated zinc sulfide) as raw materials, but can also be made of existing conventional scintillator materials. The scintillator layer 4 is disposed on the optical adhesive layer 3. The optical adhesive layer 3 and the scintillator layer 4 work together to optimize light signal transmission and improve imaging resolution. By using neutron detection integration, the light signal generated by neutrons is accumulated to achieve neutron imaging detection, reducing the size of the detector, improving light collection efficiency, improving imaging resolution and stability, and simplifying the manufacturing process and reducing costs.

[0021] Example 2:

[0022] This embodiment, based on the above embodiment, further defines the scintillator layer and the optical adhesive layer. The thickness of the scintillator layer 4 is 500 μm; the thickness of the optical adhesive layer 3 is 5 μm; and the pixel size of the substrate layer 2 is 200 μm. The other parts of this embodiment are the same as those in the above embodiment, and will not be repeated here.

[0023] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the use of terms such as "horizontal" or "vertical" in the description of this utility model does not imply that the component is required to be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A thermal neutron imaging detector based on a TFT area array detector, characterized in that, The device includes a housing, a TFT substrate, and a scintillator layer. Both the TFT substrate and the scintillator layer are disposed in the housing. The TFT substrate includes a substrate layer and an optical adhesive layer. The scintillator layer is disposed on the optical adhesive layer. The optical adhesive layer and the scintillator layer work together to optimize optical signal transmission and improve imaging resolution.

2. The thermal neutron imaging detector based on a TFT array detector as described in claim 1, characterized in that, The thickness of the scintillator layer is 200μm-500μm.

3. The thermal neutron imaging detector based on a TFT array detector as described in claim 1, characterized in that, The thickness of the optical adhesive layer is 2μm-5μm.

4. The thermal neutron imaging detector based on a TFT array detector as described in claim 1, characterized in that, The pixel size of the substrate layer is 50μm to 200μm.

5. The thermal neutron imaging detector based on a TFT array detector as described in claim 1, characterized in that, The shell is made of metal.

6. The thermal neutron imaging detector based on a TFT array detector as described in claim 5, characterized in that, The casing is made of copper or stainless steel.

7. The thermal neutron imaging detector based on a TFT array detector as described in claim 5, characterized in that, The thickness of the shell is 0.5-1mm.

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