A lightweight scintillator detector based on array-type SiPM

Abstract

This utility model discloses a lightweight scintillator detector based on an array-type SiPM, including an iron end cap, a base plate, an iron outer shell, and a back plate; the iron end cap is connected to the front opening of the iron outer shell, and the rear opening of the iron outer shell is connected to the back plate; the bottom opening of the iron outer shell is connected to the base plate; the front end of the iron outer shell is provided with a first nylon anechoic chamber, an encapsulated CLYC scintillation crystal, a second nylon anechoic chamber, a SiPM sensor array, and a ceramic circuit board; the rear end of the iron outer shell is provided with an aluminum bracket, and each data acquisition board and each signal sampling board are fixed to the base plate through the aluminum bracket; the encapsulated CLYC scintillation crystal is located in the first nylon anechoic chamber, the SiPM sensor array is fixed on the ceramic circuit board, and the ceramic circuit board is fixed to the rear end of the second nylon anechoic chamber; the connectors on the ceramic circuit board are interconnected with the signal sampling board through a rigid-flexible bonding plate; the ceramic circuit board and the first and second nylon anechoic chambers constitute a primary anechoic chamber, and a secondary anechoic chamber is provided outside the primary anechoic chamber.

Description

Technical Field

[0001] This utility model belongs to the field of detector equipment manufacturing and relates to a lightweight scintillator detector based on array-type SiPM. Background Technology

[0002] Inorganic scintillator detectors are high-performance particle detectors primarily composed of inorganic scintillation crystals and photoelectric conversion devices. These detectors utilize the scintillation light generated by the interaction of neutral particles / rays with the inorganic scintillation crystal. The photoelectric conversion device converts the optical signal into an electrical signal, and the information of the analyte particle is determined based on the characteristics of the readout signal. Inorganic scintillator detectors have wide applications in nuclear medicine, high-energy physics, nuclear safety inspection, and industrial non-destructive testing. For example, in nuclear medicine, scintillator detectors can be used for neutron dose monitoring and gamma-ray background measurement in neutron capture therapy; in high-energy physics, scintillator detectors can quickly distinguish between neutrons and gamma rays, thereby improving the accuracy of experimental data. In the past few decades, liquid scintillator detectors based on photomultiplier tubes (PMTs) have been extensively researched and applied. However, the application of PMTs is greatly limited due to their typically large size, high cost, low photon detection efficiency, and sensitivity to magnetic field changes. In addition, photomultiplier tubes require extremely high bias voltages (over 1000V) to operate, making integration extremely difficult. Scintillator detectors are also large in size and weight, making them difficult to transport and deploy.

[0003] Silicon photomultiplier tubes (SiPMs) are a new type of high-efficiency photoelectric conversion device characterized by small size, low cost, and high photon detection efficiency. Compared with traditional photomultiplier tubes (PMTs), SiPMs offer advantages such as insensitivity to magnetic field changes, low operating bias voltage, and ease of integration with electronic systems, making them significantly superior in the field of low-light detection. As a next-generation photoelectric conversion device, SiPMs have shown great application potential in replacing traditional PMTs. Compared to PMTs, SiPMs are more suitable for use with various inorganic scintillation crystals to manufacture smaller, lower-cost, and more compact scintillator detectors.

[0004] However, SiPMs still face some technical challenges in practical applications. First, the small size of a single packaged SiPM makes it difficult to achieve full coverage of the crystal surface when combined with a larger scintillator crystal, thus affecting the acquisition of high signal-to-noise ratio signals. Second, SiPMs are prone to saturation under high light intensity, resulting in a limited dynamic range and restricting their application in high-range detection. To address these issues, an effective method is to arrange multiple SiPMs in a compact manner to cover the large-size, high-yield scintillator crystal as much as possible, enabling large-area readout of the scintillator signal and thereby improving the detector's signal range and signal-to-noise ratio. Nevertheless, SiPM-based scintillator detectors still face a series of technical challenges in their design, mainly including the following aspects:

[0005] (1) Particle path design: The amount of material in the path of neutral particles to the scintillator should be minimized to avoid interference with particle detection, which would lead to a decrease in the energy resolution of the detector.

[0006] (2) Darkroom environment design: The SiPM sensor should be in a closed environment to avoid weak light leakage from affecting the detection process.

[0007] (3) Signal readout and anti-interference: While minimizing signal crosstalk and spatial electromagnetic interference, ensure that the signal of each channel of the SiPM array in a closed environment can be read out independently and transmitted to the back-end electronic system.

[0008] (4) Thermal noise control: Since SiPM is sensitive to thermal noise, effective measures need to be taken to reduce thermal noise in a closed environment.

[0009] (5) Lightweight equipment: Under the premise of ensuring the working performance of the detector and the ease of assembly, the electronic system and its supporting heat dissipation system need to be reasonably laid out in order to achieve the lightweight design of the entire detector equipment. Utility Model Content

[0010] This utility model relates to a lightweight scintillator detector based on an array-type SIPM that can distinguish between high-energy neutrons and gamma rays. It aims to overcome the above-mentioned technical challenges through a reliable design scheme, and achieve the requirements of lightweight and portable overall equipment while ensuring that the scintillator detector can reliably distinguish between high-energy neutrons and gamma rays.

[0011] The technical solution of this utility model is as follows:

[0012] A lightweight scintillator detector based on an array-type SiPM is characterized in that it includes an iron end cap 7, a base plate 16, an iron outer shell 20, and a back plate 23; the iron end cap 7 is connected to the front opening of the iron outer shell 20, the rear opening of the iron outer shell 20 is connected to the back plate 23, and the bottom opening of the iron outer shell 20 is connected to the base plate 16.

[0013] The front end of the iron casing 20 is provided with a first nylon dark chamber 1, an encapsulated CLYC scintillation crystal 2, a second nylon dark chamber 6, a SiPM sensor array 8, and a ceramic circuit board 9; the rear end of the iron casing 20 is provided with an aluminum bracket 19, and each data acquisition board 17 and each signal sampling board 18 are fixed on the base plate 16 through the aluminum bracket 19.

[0014] The encapsulated CLYC scintillation crystal 2 is located inside the first nylon dark chamber 1 and is connected to the front end of the first nylon dark chamber 1 by the second screw 5. The output window of the encapsulated CLYC scintillation crystal 2 is attached to the SiPM sensor array 8 by a transparent adhesive pad 4. The front end of the first nylon dark chamber 1 is provided with a threaded hole that matches the first screw 3. The compression of the transparent adhesive pad 4 between the encapsulated CLYC scintillation crystal 2 and the SiPM sensor array 8 is controlled by adjusting the first screw 3 to ensure light transmittance.

[0015] The SiPM sensor array 8 is fixed on the ceramic circuit board 9, and each SiPM sensor on the SiPM sensor array 8 is connected to the connector on the ceramic circuit board 9 for signal and power supply.

[0016] The ceramic circuit board 9 is fixed to the rear end of the second nylon dark chamber 6, the front end of the first nylon dark chamber 1 extends along the front opening of the second nylon dark chamber 6, and the front side wall of the first nylon dark chamber 1 is sealed to the front opening of the second nylon dark chamber 6.

[0017] The ceramic circuit board 9, the second nylon dark chamber 6, and the first nylon dark chamber 1 constitute the first-level dark chamber of the packaged CLYC scintillation crystal 2, which is used to provide light protection for the packaged CLYC scintillation crystal 2 and the SiPM sensor array 8.

[0018] A secondary darkroom is provided outside the primary darkroom for secondary light protection of the packaged CLYC scintillation crystal 2 and SiPM sensor array 8.

[0019] The connectors on the ceramic circuit board 9 are interconnected with the signal sampling board 18 through a rigid-flexible bonding plate. The rigid-flexible bonding plate includes a first connector board 10, an adapter board 14, a flexible circuit board, and a second connector board 15 connected in sequence. The first connector board 10 is connected to the connectors on the ceramic circuit board 9, and the second connector board 15 is connected to the connectors on the signal sampling board 18.

[0020] The signal sampling board 18 is used to receive the signal output by the SiPM sensor, process it, and then transmit it to the data acquisition board 17.

[0021] Furthermore, the secondary anechoic chamber includes an iron anechoic chamber 12, which provides a ferromagnetic shielding environment to reduce the spatial electromagnetic interference of the external environment on the analog signal transmission between the SiPM sensor array 8 and the signal sampling board 18; wherein, the iron end cap 7 is sealed to the front opening of the iron anechoic chamber 12, the rear end of the primary anechoic chamber is located inside the iron anechoic chamber 12, the front end of the primary anechoic chamber extends along the opening of the iron end cap 7, and the front sidewall of the primary anechoic chamber is sealed to the opening of the iron end cap 7.

[0022] Furthermore, the adapter plate 14 is fixed to the second nylon darkroom 6 by an L-shaped fixing block 11 and screws, and the gap between the L-shaped fixing block 11, the adapter plate 14 and the iron darkroom 12 is filled by a silicone sealing strip 13.

[0023] Furthermore, the base plate 16 is provided with an air inlet, and the iron outer shell 20 is provided with a row of air vents and a fan 25. The fan 25 is placed perpendicular to the data acquisition board 17 and the signal sampling board 18 in spatial position, so that the airflow direction is parallel to the data acquisition board 17 and the signal sampling board 18.

[0024] Furthermore, the second nylon darkroom 6 and the first nylon darkroom 1 are limited by a protruding structure.

[0025] Furthermore, the first screw 3 is made of black nylon.

[0026] The effective effects of this utility model are:

[0027] 1. The device uses a SiPM sensor array that fully covers the CLYC crystal, combined with a double-layer compact darkroom design with excellent light-shielding effect. While minimizing the mass of particles on the path to the crystal, it also meets the heat dissipation and electromagnetic shielding requirements of the SiPM sensor array and readout electronics. It can accurately distinguish neutrons and gamma rays in the mixed radiation field with high energy resolution.

[0028] 2. The entire detector's electronics, heat dissipation, and mechanical structure are small and compact, meeting the requirements for lightweight and portable equipment. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a packaged CLYC scintillation crystal.

[0030] Figure 2 This is a cross-sectional schematic diagram of a lightweight scintillator detector based on an array-type SiPM.

[0031] Figure 3 This is a structural breakdown diagram of a lightweight scintillator detector based on an array-type SiPM.

[0032] Figure 4 This is a schematic diagram of the assembled lightweight scintillator detector based on an array-type SiPM.

[0033] Figure 5 The figure shows the test results of a lightweight scintillator detector based on an array-type SiPM for neutrons and gamma rays.

[0034] (a) Two-dimensional scatter plot of waveform identification, (b) One-dimensional projection plot of waveform identification.

[0035] Reference numerals: 1-First nylon anechoic chamber, 2-Encapsulated CLYC scintillation crystal, 3-First screw, 4-Transparent rubber pad, 5-Second screw, 6-Second nylon anechoic chamber, 7-Iron end cap, 8-SiPM sensor array, 9-Ceramic circuit board, 10-First connector board, 11-L-shaped fixing block, 12-Iron anechoic chamber, 13-Silicone sealing strip, 14-Adapter board, 15-Second connector board, 16-Base plate, 17-Data acquisition board, 18-Signal sampling board, 19-Aluminum bracket, 20-Iron housing, 21-Third screw, 22-Stud, 23-Backplate, 24-Shielding cover, 25-Fan, 26-Support foot, 27-Stainless steel housing, 28-Glass window, 29-CLYC crystal. Detailed Implementation

[0036] 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 only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] This application describes a lightweight scintillator detector based on an array-type SIPM, comprising a first nylon anechoic chamber 1, an encapsulated CLYC scintillation crystal 2, a first screw 3, a transparent rubber pad 4, a second screw 5, a second nylon anechoic chamber 6, an iron end cap 7, a SiPM sensor array 8, a ceramic circuit board 9, a first connector board 10, an L-shaped fixing block 11, an iron anechoic chamber 12, a silicone sealing strip 13, an adapter board 14, a second connector board 15, a base plate 16, a data acquisition board 17, a signal sampling board 18, an aluminum bracket 19, an iron outer shell 20, a third screw 21, a stud 22, a back plate 23, a shielding cover 24, a fan 25, and supporting feet 26.

[0038] Figure 1 The diagram shows the structure of the encapsulated CLYC scintillation crystal 2. The encapsulated CLYC scintillation crystal 2 is formed by bonding and sealing the CLYC crystal 29 with a stainless steel shell 27 and a glass window 28 using adhesive. The CLYC crystal 29 is a high-performance inorganic scintillator material. Although CLYC crystals are sensitive to temperature and humidity, they have characteristics such as high density, high light output, fast decay time, and high energy resolution. They can simultaneously and efficiently distinguish gamma rays and neutrons, making them suitable for applications in mixed radiation fields. Figure 2 This is a cross-sectional schematic diagram of a lightweight scintillator detector based on an array-type SiPM. Figure 3 An exploded view of the structure of a lightweight scintillator detector based on an array of SiPMs is shown. The glass window 28 of the encapsulated CLYC scintillation crystal 2 is bonded to the SiPM sensor array 8, composed of multiple SiPMs, via an elastic transparent adhesive pad 4, thereby increasing the light transmittance between the crystal and the SiPM array. Furthermore, the size of the SiPM sensor array 8 is larger than the size of the glass 28, ensuring that the crystal is fully covered by the detector, further improving photon collection efficiency. The SiPM sensor array 8 is soldered onto a larger ceramic circuit board 9, with each SiPM connected to connectors on the circuit board for signal and power supply. The ceramic circuit board 9 is fixed to a second nylon dark chamber 6 by screws. The second nylon dark chamber 6 and the first nylon dark chamber 1 are limited by a protruding structure. The first screw 3 is made of black nylon, and the compression of the transparent adhesive pad 4 between the encapsulated CLYC scintillation crystal 2 and the SiPM sensor array 8 is controlled by the threads of the first nylon dark chamber 1, thereby ensuring light transmittance. Since both the first nylon anechoic chamber 1 and the first screw 3 are made of black nylon, which is mainly composed of light elements (such as carbon, hydrogen, oxygen, and nitrogen), the absorption cross section for gamma rays is small and will not significantly affect the energy resolution of gamma rays. In addition, although hydrogen atoms in nylon have a significant moderation effect on neutrons, the thickness of nylon is less than 1 cm in the path of the particle passing through the nylon anechoic chamber and entering the crystal, so the effect on neutron energy resolution is almost negligible. This design reduces the mass of matter and meets the energy resolution requirements for neutrons and gamma rays.

[0039] The connectors on the ceramic circuit board 9 are interconnected with the signal sampling board 18 via a rigid-flex board. The rigid-flex board is composed of a first connector board 10, an adapter board 14, a second connector board 15, and two flexible circuit boards. The first connector board 10 and the second connector board 15 are connected to the ceramic circuit board 9 and the signal sampling board 18 respectively via high-density connectors. This rigid-flex board structure is used for signal interconnection between the ceramic circuit board 9 containing the SiPM array and the electronic system. It significantly reduces the number and size of cables connecting multiple signal lines between them. Simultaneously, this circuit board structure effectively controls the spacing between each signal line, avoiding crosstalk and spatial electromagnetic interference between signals. The signal sampling board 18 can summarize each SiPM signal received at the same time, amplify, filter, and shape it, and transmit the signal at that moment to the data acquisition board 17 via a coaxial cable. After analog-to-digital conversion, signal discrimination and storage are performed, and finally, the signal is output to the host computer.

[0040] To avoid interference from external natural light during the detection process, the encapsulated CLYC crystal 2, transparent pad 4, and SiPM sensor array 8 should be placed in a darkroom environment. Furthermore, the thickness of the darkroom and the atomic number of the material must be limited along the particle's path to the crystal to improve the detector's energy resolution. To achieve this, the detector uses a primary darkroom consisting of a black first nylon darkroom 1, a black second nylon darkroom 6, and a ceramic circuit board 9. This primary darkroom has no other medium in the direction of particle beam incidence, meeting the detector's high energy resolution requirements. However, the ceramic circuit board 9 often cannot be tightly fitted to the second nylon darkroom 6. To further meet the light-shielding requirements, the ceramic circuit board 9 is further encased in the first nylon darkroom 1, the second nylon darkroom 6, and a blackened iron darkroom 12 for secondary light protection. To prevent the adapter plate 14 from affecting the light-shielding performance, the adapter plate 14 is first fixed to the second nylon dark chamber 6 using a black nylon L-shaped fixing block 11 and screws. A silicone sealing strip 13 is then used to fill the gaps between the L-shaped fixing block 11, the adapter plate 14, and the iron dark chamber 12, thus achieving a reliable light-shielding effect. In addition, the iron dark chamber 12, together with the iron end cap 7, forms a relatively closed ferromagnetic shielding environment, effectively reducing the spatial electromagnetic interference from the external environment on the analog signal transmission between the SiPM sensor array 8 and the signal sampling board 18.

[0041] Because the CLYC scintillation crystal 29 and the SiPM sensor array 8 are highly sensitive to temperature, rising temperatures will significantly increase the thermal noise of the detector. Although the power consumption of the SiPM sensor array 8 is low, in a confined, enclosed environment, if heat cannot be effectively dissipated, the temperature of the SiPM sensor and the CLYC scintillation crystal 29 will rise rapidly. This detector uses ceramic as the substrate for the SiPM array 9 circuit board, which significantly increases the natural convection heat dissipation area, allowing heat to be quickly transferred between the ceramic circuit board 9 and the iron anechoic chamber 12, and ultimately transferred to the external environment through the iron anechoic chamber 12, effectively controlling the thermal noise of the CLYC scintillation crystal 29 and the SiPM sensor array 8.

[0042] The two data acquisition boards 17 and two signal sampling boards 18 are relatively fixed by studs 22 and then fixed to the base plate 16 by two aluminum brackets 19 and a third screw 21. At the same time, the second nylon anechoic chamber 6 is also fixed to the base plate, thus achieving overall fixation from the packaged CLYC scintillation crystal 2, SiPM sensor array 8 to the readout electronics system. The iron end cap 7, iron outer shell 20, back plate 23, and base plate 16 are all made of iron. After the anechoic chamber, readout electronics system, and base plate 16 are relatively fixed, the fixing holes between the iron end cap 7, iron outer shell 20, back plate 23, and base plate 16 form a closed chassis with ferromagnetic shielding function, thereby avoiding electromagnetic interference from the external space.

[0043] Due to the high power consumption of the readout electronics system located inside the chassis, an air inlet is designed on the base plate 16 to achieve effective heat dissipation. The base plate 16 is supported by feet 26 to ensure rapid airflow into the chassis. Simultaneously, a fan 25 is fixed on the outer iron plate 20. The fan 25 is spatially perpendicular to the two data acquisition boards 17 and two signal sampling boards 18, ensuring that airflow is expelled from the exhaust vents on the outer iron plate 20 to the external environment. The airflow direction is parallel to the data acquisition boards 17 and signal sampling boards 18. This lateral airflow design avoids eddies in the airflow field inside the chassis, preventing excessive heat accumulation. Since the fan 25 is a mechanically rotating device, a perforated iron shield 24 is used to mount the fan 25 within the shielded structure, effectively preventing noise interference from the fan rotation. The overall structure weighs less than 1.5 kg, making it compact and lightweight, meeting the requirements for lightweight equipment. A schematic diagram of the assembled lightweight scintillator detector based on an array-type SiPM is shown below. Figure 4 As shown.

[0044] Figure 5 This demonstrates the detector's ability to distinguish between neutrons and gamma rays. Figure 5(a) A two-dimensional scatter plot showing the waveform discrimination of neutrons and gamma rays using pulse shape discrimination technology. In the plot, the horizontal axis represents the equivalent gamma energy (the energy value converted from gamma rays after energy scaling, in MeV), and the vertical axis represents the waveform discrimination ratio (defined as the ratio of the short integral to the long integral of the waveform). The elongated region with densely distributed points at the top corresponds to gamma rays, while the circular region with densely distributed points at the bottom corresponds to neutrons. There is no overlap between the two in the plot, and their distributions are significantly different. Figure 5 (b) is Figure 5 (a) A one-dimensional projection diagram of the waveform of the neutron energy region along the Y-axis. In this projection diagram, the ratio of the distance between the neutron peak and the gamma peak to the sum of their full width at half maximum (FWHM) is defined as the quality factor, which is 3.88. This further demonstrates that the neutron and gamma ray differentiation is significant and exhibits good separation performance.

[0045] Although specific embodiments of the present invention have been disclosed for illustrative purposes to aid in understanding and implementing the invention, those skilled in the art will understand that various substitutions, variations, and modifications are possible without departing from the spirit and scope of the invention and the appended claims. Therefore, the invention should not be limited to the content disclosed in the preferred embodiments, and the scope of protection claimed by the invention is defined by the claims.

Claims

1. A lightweight scintillator detector based on an array-type SiPM, characterized in that, It includes an iron end cap (7), a base plate (16), an iron outer shell (20), and a back plate (23); the iron end cap (7) is connected to the front opening of the iron outer shell (20), the rear opening of the iron outer shell (20) is connected to the back plate (23), and the bottom opening of the iron outer shell (20) is connected to the base plate (16); The front end of the iron shell (20) is provided with a first nylon dark chamber (1), an encapsulated CLYC scintillation crystal (2), a second nylon dark chamber (6), a SiPM sensor array (8), and a ceramic circuit board (9); the rear end of the iron shell (20) is provided with an aluminum bracket (19), and each data acquisition board (17) and each signal sampling board (18) are fixed on the base plate (16) through the aluminum bracket (19); The encapsulated CLYC scintillation crystal (2) is located inside the first nylon dark chamber (1) and is connected to the front end of the first nylon dark chamber (1) by a second screw (5). The output window of the encapsulated CLYC scintillation crystal (2) is attached to the SiPM sensor array (8) by a transparent adhesive pad (4). The front end of the first nylon dark chamber (1) is provided with a threaded hole that matches the first screw (3). The compression of the transparent adhesive pad (4) between the encapsulated CLYC scintillation crystal (2) and the SiPM sensor array (8) is controlled by adjusting the first screw (3) to ensure light transmittance. The SiPM sensor array (8) is fixed on the ceramic circuit board (9), and each SiPM sensor on the SiPM sensor array (8) is connected to the connector on the ceramic circuit board (9) for signal and power supply. The ceramic circuit board (9) is fixed to the rear end of the second nylon dark chamber (6), the front end of the first nylon dark chamber (1) extends along the front end opening of the second nylon dark chamber (6), and the front end sidewall of the first nylon dark chamber (1) is sealed to the front end opening of the second nylon dark chamber (6). The ceramic circuit board (9), the second nylon dark chamber (6) and the first nylon dark chamber (1) constitute the first-level dark chamber of the packaged CLYC scintillation crystal (2), which is used to provide light protection for the packaged CLYC scintillation crystal (2) and the SiPM sensor array (8). A secondary dark chamber is provided outside the primary dark chamber for secondary light protection of the packaged CLYC scintillation crystal (2) and SiPM sensor array (8); The connectors on the ceramic circuit board (9) are interconnected with the signal sampling board (18) through a rigid-flexible bonding plate; the rigid-flexible bonding plate includes a first connector board (10), an adapter board (14), a flexible circuit board, and a second connector board (15) connected in sequence. The first connector board (10) is connected to the connectors on the ceramic circuit board (9), and the second connector board (15) is connected to the connectors on the signal sampling board (18). The signal sampling board (18) is used to receive the signal output by the SiPM sensor, process it, and then transmit it to the data acquisition board (17).

2. The lightweight scintillator detector based on array-type SiPM according to claim 1, characterized in that, The secondary anechoic chamber includes an iron anechoic chamber (12) for providing a ferromagnetic shielding environment to reduce the spatial electromagnetic interference of the external environment on the analog signal transmission between the SiPM sensor array (8) and the signal sampling board (18); wherein, the iron end cap (7) is sealed to the front opening of the iron anechoic chamber (12), the rear end of the primary anechoic chamber is located inside the iron anechoic chamber (12), the front end of the primary anechoic chamber extends along the opening of the iron end cap (7), and the front side wall of the primary anechoic chamber is sealed to the opening of the iron end cap (7).

3. The lightweight scintillator detector based on array-type SiPM according to claim 2, characterized in that, The adapter plate (14) is fixed to the second nylon darkroom (6) by an L-shaped fixing block (11) and screws, and the gap between the L-shaped fixing block (11), the adapter plate (14) and the iron darkroom (12) is filled by a silicone sealing strip (13).

4. The lightweight scintillator detector based on an array-type SiPM according to claim 1, 2, or 3, characterized in that, The base plate (16) is provided with an air inlet, and the iron shell (20) is provided with a row of air vents and a fan (25). The fan (25) is placed perpendicular to the data acquisition board (17) and the signal sampling board (18) in spatial position, so that the airflow direction is parallel to the data acquisition board (17) and the signal sampling board (18).

5. The lightweight scintillator detector based on an array-type SiPM according to claim 1, 2, or 3, characterized in that, The second nylon darkroom (6) is limited to the first nylon darkroom (1) by a protruding structure.

6. The lightweight scintillator detector based on an array-type SiPM according to claim 1, 2, or 3, characterized in that, The first screw (3) is made of black nylon.

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