Detector for muon detection

Abstract

The utility model relates to the technical field of muon detection, in particular to a detector for muon detection, which comprises a shell, a first detection unit, a second detection unit, a first signal acquisition circuit board, a second signal acquisition circuit board and a SiPM reading circuit board are arranged in the shell, and a sheet is arranged on the SiPM reading circuit board. After the sheet is bent, the SiPM reading circuit board is installed on the first detection unit and the second detection unit. The first signal acquisition circuit board and the second signal acquisition circuit board are respectively connected with the SiPM reading circuit boards on the first detection unit and the second detection unit; the first signal acquisition circuit board and the second signal acquisition circuit board are respectively provided with a first socket, and the housing is provided with socket holes for installing the first sockets. According to the SiPM read-out circuit board provided by the utility model, the sheet which is easy to bend is arranged, so that the SiPM read-out circuit board is convenient to disassemble and assemble; the first socket is connected with different patch cords, so that switching with different signal reading systems can be realized, signal transmission is realized, and the adapter has better adaptability.

Description

Technical Field

[0001] This utility model relates to the field of muon detection technology, specifically a detector for muon detection. Background Technology

[0002] Because muons have a long penetration range and are a free source of radiation naturally generated by high-energy cosmic rays with low operating costs, muon imaging technology has received widespread attention in recent years and has been gradually applied to various aspects of scientific research and industry.

[0003] Current muon detectors use SiPM (Silicon Photomultiplier) readout circuit boards to read out the detection signal. However, during disassembly and assembly, the SiPM on the readout circuit board is easily damaged, or the plastic scintillator is damaged, sometimes making disassembly impossible. This is not only expensive but also time-consuming. In addition, most current muon detectors are custom-designed and require a fixed signal readout system, which has certain limitations. Therefore, there is an urgent need to research a muon detector that allows for quick and easy disassembly of the SiPM readout circuit board and has higher adaptability. Utility Model Content

[0004] The technical problem to be solved by this invention is to provide a detector for muon detection, which can effectively solve the problems mentioned in the background art.

[0005] To solve the above problems, the technical solution adopted by this utility model is: a detector for muon detection, including a shell, characterized in that the shell is provided with a first detection unit, a second detection unit, a first signal acquisition circuit board, a second signal acquisition circuit board and a SiPM readout circuit board.

[0006] The first and second detection units are used for muon detection and photon generation; the SiPM readout circuit board is provided with a thin sheet, which is bent to mount the SiPM readout circuit board on the first and second detection units. The SiPM readout circuit board is used to convert the photons generated by the first and second detection units into photoelectric signals and output electrical signals.

[0007] The first signal acquisition circuit board and the second signal acquisition circuit board are electrically connected to the SiPM readout circuit board on the first detection unit and the second detection unit, respectively, for acquiring the electrical signal output by the SiPM readout circuit board; the first signal acquisition circuit board and the second signal acquisition circuit board are respectively provided with a first socket, and the housing is provided with a socket hole corresponding to the first socket. The port of the first socket is installed in the socket hole and is connected to the signal readout system outside the housing through the socket hole, and outputs an electrical signal to the signal readout system.

[0008] Preferably, the first detection unit and the second detection unit are arranged perpendicularly in the X and Y directions. The first detection unit and the second detection unit are each composed of a number of plastic scintillator units. Each plastic scintillator unit is composed of 4 triangular prism-shaped plastic scintillators bundled together in an alternating manner. Each plastic scintillator has a light-emitting port on the bottom surface on the same side. The SiPM readout circuit board is installed on the outside of the light-emitting port, and the silicon photomultiplier tube (SiPM) provided on the SiPM readout circuit board is attached to the light-emitting port.

[0009] Preferably, the housing includes a base plate; the housing is provided with a first fixing block and a second fixing block disposed opposite to each other, the first fixing block is fixedly connected to one side of the housing, the second fixing block is threadedly connected to the base plate, and the first detection unit is fitted and fixed between the first fixing block and the second fixing block.

[0010] Preferably, the second fixing block includes a base and a limiting block. The base is L-shaped. The base is provided with a first threaded through hole and a second threaded through hole that are perpendicular to each other. The base is mounted on a base plate through the first threaded through hole and a screw. The limiting block is provided with a limiting hole that is aligned with the direction of the second threaded through hole. The limiting hole does not penetrate the limiting block. The second threaded through hole communicates with the limiting hole.

[0011] Preferably, the base plate is provided with a boss, which is used to fix the first detection unit.

[0012] Preferably, the housing is further provided with a tray, which is located above the second detection unit; the tray is provided with a third fixing block and a fourth fixing block, a round hole is provided on one side edge of the tray for installing the third fixing block, and a U-shaped hole is provided on the opposite side edge of the tray for installing the fourth fixing block, and the second detection unit is fitted and fixed between the third fixing block and the fourth fixing block.

[0013] Preferably, the base plate is provided with a plurality of fifth fixing blocks, which are respectively located on the outer perimeter of the first detection unit. The support plate is provided with fixing holes corresponding to the fifth fixing blocks. A support structure is provided between the fifth fixing blocks and the support plate. The support plate is installed on the fifth fixing blocks by screws passing through the fixing holes and the support structure in sequence.

[0014] Preferably, the top of the outer casing is provided with an outer casing cover plate, and the outer casing cover plate and the outer casing are provided with mounting holes arranged opposite to each other.

[0015] Preferably, the top of the housing is also provided with a groove for installing a sealing strip.

[0016] Compared with the prior art, this utility model provides a detector for muon detection, which has the following beneficial effects:

[0017] The SiPM readout circuit board of this utility model has flexible thin sheets on both sides. After bending, the thin sheets can wrap the SiPM readout circuit board around the surface of the plastic scintillator. The thin sheets and the plastic scintillator can be fixed together with aluminum foil tape, which facilitates the assembly and disassembly of the SiPM readout circuit board.

[0018] In this invention, the muon detector integrates the detection signal and connects different adapter cables through the first socket and socket hole, enabling it to switch between different signal readout systems and thus achieve signal transmission, resulting in better adaptability. Attached Figure Description

[0019] Figure 1 This is a partial structural schematic diagram of the present invention;

[0020] Figure 2 This is a partial structural schematic diagram of the present invention;

[0021] Figure 3 This is a front view of the plastic scintillator unit of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the plastic scintillator unit of this utility model;

[0023] Figure 5 This is a schematic diagram of the SiPM readout circuit board of this utility model;

[0024] Figure 6 This is a schematic diagram of the disassembled structure of this utility model;

[0025] Figure 7 This is a schematic diagram of the disassembled structure of the second fixing block of this utility model;

[0026] Figure 8This is a schematic diagram of the disassembled structure of the tray of this utility model;

[0027] Figure 9 This is a schematic diagram of the structure of the tray and the second detection unit of this utility model;

[0028] Figure 10 This is a schematic diagram of the structure of this utility model;

[0029] Figure 11 This is a schematic diagram of the structure of the first or second signal acquisition circuit board of this utility model;

[0030] Figure 12 This is a schematic diagram of the structure of the first or second signal acquisition circuit board of this utility model;

[0031] Figure 13 This is a schematic diagram of the SCSI-68P bent female connector structure of this utility model.

[0032] The components are as follows: 10. Outer shell; 101. Socket hole; 102. Base plate; 103. Fifth fixing block; 104. Groove; 20. Outer shell cover plate; 201. Mounting hole; 1. First detection unit; 11. Plastic scintillator; 12. Light outlet; 2. Second detection unit; 3. First signal acquisition circuit board; 31. First socket; 4. Second signal acquisition circuit board; 5. SiPM readout circuit board; 51. Thin sheet; 61. First fixing block; 62. Second fixing block; 63. Base; 631. First threaded through hole; 632. Second threaded through hole; 64. Limiting block; 641. Limiting hole; 7. Boss; 8. Support plate; 81. Third fixing block; 82. Fourth fixing block; 83. Round hole; 84. U-shaped hole; 85. Fixing hole; 9. Support structure. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0034] Reference Figure 1-13 As a specific embodiment of this utility model:

[0035] The muon detector includes a housing 10, a first detection unit 1 and a second detection unit 2, a SiPM readout circuit board 5, a first signal acquisition circuit board 3 and a second signal acquisition circuit board 4.

[0036] The first detection unit 1 and the second detection unit 2 are each composed of several plastic scintillator units, which are arranged vertically in the X and Y directions inside the outer shell 10. The plastic scintillator units are used to detect cosmic ray muons and generate photons.

[0037] The SiPM readout circuit board 5 is provided with a bendable sheet 51. After the sheet 51 is bent, the SiPM readout circuit board 5 can be fixed on the plastic scintillator unit to capture the photons generated by the plastic scintillator unit and perform photoelectric signal conversion to read out the detection signal.

[0038] The first signal acquisition circuit board 3 and the second signal acquisition circuit board 4 are located in reserved positions inside the housing 10 and are respectively connected to the SiPM readout circuit board 5 on the first detection unit 1 and the second detection unit 2. They are used to power the SiPM readout circuit board 5 and acquire detection signals. The first signal acquisition circuit board 3 and the second signal acquisition circuit board 4 are respectively provided with the same first socket 31. The ports of the first socket 31 are respectively installed in the reserved socket holes 101 of the housing 10. The first socket 31 is used to connect to the signal readout system through the adapter cable, output detection signals to the signal readout system, and power the first signal acquisition circuit board 3, the second signal acquisition circuit board 4 and the SiPM readout circuit board 5.

[0039] In this embodiment, the SiPM readout circuit board 5 has bendable thin sheets 51 on both sides. The bent thin sheets 51 can wrap the SiPM readout circuit board 5 around the surface of the plastic scintillator unit. The thin sheets 51 and the plastic scintillator unit can be fixed together by aluminum foil tape, which facilitates the assembly and disassembly of the SiPM readout circuit board 5.

[0040] In addition, in this embodiment, the first signal acquisition board 3 and the second signal acquisition board 4 can integrate the detection signals. Through the first socket 31 and the socket hole 101, different adapter cables can be connected, which can be used to transfer signals between different signal reading systems, thereby realizing signal transmission and having better adaptability.

[0041] Specifically, such as Figure 3 As shown, the plastic scintillator unit is composed of four triangular prism-shaped plastic scintillators 11 bundled together in an alternating manner. Each plastic scintillator 11 is covered with an aluminum foil reflective layer, which can reflect the photons generated by the plastic scintillator 11. In addition, each plastic scintillator 11 has a light-emitting port 12 on the bottom surface on the same side. The SiPM readout circuit board 5 is mounted on the outside of the light-emitting port 12, and the silicon photomultiplier tube (SiPM) on the SiPM readout circuit board 5 is attached to the light-emitting port 12. Therefore, the silicon photomultiplier tube (SiPM) on the SiPM readout circuit board 5 can capture the photons reflected from the inside of the corresponding plastic scintillator 11 at the light-emitting port 12, perform photoelectric signal conversion, and output an electrical signal.

[0042] In this embodiment, the first detection unit 1 and the second detection unit 2 each include 8 plastic scintillator units for outputting 32 detection signals. It should be noted that the number of plastic scintillators 11 is not specifically limited in this embodiment and can be increased or decreased according to the actual situation.

[0043] When installing the SiPM readout circuit board 5, the sheet 51 can be bent to a height suitable for the plastic scintillator 11 and can be fixed with aluminum foil tape. This is because aluminum foil tape can both provide good light protection and facilitate the removal of the SiPM readout circuit board 5. Of course, other types of tape, stretch film, or other adhesive methods can also be used to fix the sheet 51, and this embodiment does not impose any specific limitations.

[0044] Specifically, in this embodiment, the PCB schematic diagram of the SiPM readout circuit board 5 is as follows: Figure 5 As shown, each SiPM readout circuit board 5 has 4 silicon photomultiplier tubes (SiPMs), and each SiPM corresponds to one plastic scintillator 11. J0 is the power supply (VCC) terminal, and J1 to J41 are the 4 signal output terminals. In this embodiment, the power supply (VCC) terminal and the signal output terminals are Ipex terminals. Other surface-mount terminals similar to Ipex terminals can also be used as power supply (VCC) terminals and signal output terminals. This embodiment does not make any specific limitations.

[0045] The first signal acquisition circuit board 3 and the second signal acquisition circuit board 4 are installed in reserved positions inside the housing 10 by screws. They are mainly used to power the SiPM readout circuit boards 5 on the first detection unit 1 and the second detection unit 2, and to acquire detection signals. The first signal acquisition circuit board 3 and the second signal acquisition circuit board 4 have the same structure, and their PCB diagrams are shown below. Figure 11-12 As shown, each signal acquisition circuit board has 8 sets of power and signal sets, corresponding to the 8 SiPM readout circuit boards 5 installed on the first detection unit 1 or the second detection unit 2, and is connected to the power (VCC) terminal and signal output terminal on the SiPM readout circuit board 5 through Ipex terminal wires. The signal output terminals are arranged sequentially from right to left on the signal acquisition circuit board.

[0046] Specifically, on the first signal acquisition circuit board 3 and the second signal acquisition circuit board 4, the aforementioned eight sets of power and signal sets are connected to the pads of the first socket 31 via wires on the PCB board, and their correspondence is as follows: Figure 11-12As shown. The third and fourth rows of pads are for signals. The first pad from the right in the fourth row is S1, followed by S1-S3-S5......S29-S31; the first pad from the right in the third row is S2, followed by S2-S4-S6......S30-S32; the first pad from the left in the second row is GND; the first pad from the right in the first row (1-3-5-7-9-11-13-15) are for power.

[0047] In this embodiment, the first socket 31 uses a SCSI-68P right-angle female connector, the structural diagram of which is shown below. Figure 13 As shown. The bent pins of the SCSI-68P right-angle female connector are soldered to the pad 31 of the first socket, and the socket portion is installed in the socket hole 101 reserved in the housing 10. The first socket 31 can be connected directly or indirectly to the signal readout system via an adapter cable to power the muon detector of this embodiment and read its detection signal.

[0048] The outer casing 10 has a first fixing block 61 and a second fixing block 62 for fixing the first detection unit 1. The first fixing block 61 is integrally formed with the outer casing 10. The second fixing block 62 includes a base 63 and a limiting block 64. The base 63 is L-shaped and has a first threaded through hole 631 and a second threaded through hole 632 that are perpendicular to each other. The first threaded through hole 631 is located on the first fixing surface. A screw passes through the first threaded through hole 631 to fix the base 63 to the bottom plate 102 of the outer casing 10. The second threaded through hole 632 is located on the second fixing surface that is perpendicular to the first fixing surface. The limiting block 64 has a limiting hole 641 that is aligned with the direction of the second threaded through hole 632. The limiting hole 641 does not penetrate the limiting block 64. After the screw passes through the second threaded through hole 632, it can enter the limiting hole 641. The plastic scintillator units are arranged between the first fixing block 61 and the second fixing block 62 in a preset manner. Specifically, to better secure the scintillator units, epoxy resin can be applied to the base plate 102 of the housing 10 before placing the plastic scintillator units. To make the scintillator units more closely spaced, after securing the scintillator units, the screws that pass through the second threaded through hole 632 and into the limiting hole 641 can be tightened. Tightening the screws can push the limiting block 64, thereby making the scintillator units more closely spaced.

[0049] In order to make the first detection unit 1 arranged neatly, the bottom plate 102 of the outer shell 10 is also provided with a boss 7, and the plastic scintillator units can be arranged sequentially along the boss 7.

[0050] The muon detector also includes a support plate 8, which is used to fix the second detection unit 2. A circular hole 83 is provided on one edge of the support plate 8 for mounting a third fixing block 81, and a U-shaped hole 84 is provided on the opposite side for mounting a fourth fixing block 82. Plastic scintillator units are arranged between the third fixing block 81 and the fourth fixing block 82 in a preset manner. Specifically, the third fixing block 81 can be installed first, then epoxy resin adhesive can be applied to the support plate 8, and the plastic scintillator units can be arranged and placed. Then, according to the position of the plastic scintillator units, the installation position of the fourth fixing block 82 in the U-shaped hole 84 can be adjusted to make the scintillator units closer together. After installation, the support plate 8 and the second detection unit 2 can be flipped over and placed above the first detection unit 1, so that the first detection unit 1 and the second detection unit 2 are perpendicular in the X and Y directions.

[0051] To prevent the second detection unit 2 from shifting, the bottom plate 102 of the outer casing 10 is provided with multiple fifth fixing blocks 103. Because the space reserved in the bottom plate 102 is different, the shapes of the fifth fixing blocks 103 are not exactly the same, but their functions are the same: to fix the support plate 8. Therefore, the support plate 8 is provided with fixing holes 85 corresponding to the fifth fixing blocks 103. To reduce the overall weight of the detector, the support plate 8 can be made of a PCB board. If the PCB board is too thin, excessive compression will cause the support plate 8 to deform; if the PCB board is too thick, excessive compression will easily cause the support plate 8 to break. Therefore, a support structure 9 of suitable height can be placed between the fifth fixing block 103 and the support plate 8. In this embodiment, the support structure 9 can be a rigid spring or a tubular structure made of alloy or PVC material; no specific limitation is made in this embodiment.

[0052] The muon detector also includes a housing cover 20, which is made of aluminum alloy. Both the housing cover 20 and the housing 10 have corresponding mounting holes 201 around their perimeter, allowing the housing 10 to be secured to the mounting holes 201 with screws. The housing 10 also has grooves 104 for installing a sealing strip, providing the assembled muon detector with good dust and water resistance. To better adapt to harsh weather conditions, both the housing 10 and the housing cover 20 undergo a black anodizing treatment, making them less prone to rust and extending their service life.

[0053] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A detector for muon detection, comprising a housing (10), characterized in that, The outer casing (10) contains a first detection unit (1), a second detection unit (2), a first signal acquisition circuit board (3), a second signal acquisition circuit board (4), and a SiPM readout circuit board (5). The first detection unit (1) and the second detection unit (2) are used for muon detection and photon generation; the SiPM readout circuit board (5) is provided with a thin sheet (51), and the thin sheet (51) is bent to install the SiPM readout circuit board (5) on the first detection unit (1) and the second detection unit (2). The SiPM readout circuit board (5) is used to convert the photons generated by the first detection unit (1) and the second detection unit (2) into photoelectric signals and output electrical signals. The first signal acquisition circuit board (3) and the second signal acquisition circuit board (4) are electrically connected to the SiPM readout circuit board (5) on the first detection unit (1) and the second detection unit (2) respectively, and are used to acquire the electrical signals output by the SiPM readout circuit board (5); the first signal acquisition circuit board (3) and the second signal acquisition circuit board (4) are respectively provided with a first socket (31), and the outer shell (10) is provided with a socket hole (101) corresponding to the first socket (31). The port of the first socket (31) is installed in the socket hole (101), and is connected to the signal readout system outside the outer shell (10) through the socket hole (101) and outputs an electrical signal to the signal readout system.

2. The detector for muon detection according to claim 1, characterized in that, The first detection unit (1) and the second detection unit (2) are arranged vertically in the X and Y directions. The first detection unit (1) and the second detection unit (2) are each composed of several plastic scintillator units. Each plastic scintillator unit is composed of 4 triangular prism plastic scintillators (11) bundled together in an alternating manner. Each plastic scintillator (11) has a light outlet (12) on the bottom surface on the same side. The SiPM readout circuit board (5) is installed on the outside of the light outlet (12), and the silicon photomultiplier tube (SiPM) provided on the SiPM readout circuit board (5) is attached to the light outlet (12).

3. A detector for muon detection according to claim 2, characterized in that, The outer casing (10) includes a base plate (102); the outer casing (10) is provided with a first fixing block (61) and a second fixing block (62) arranged opposite to each other. The first fixing block (61) is fixedly connected to one side of the outer casing (10), and the second fixing block (62) is threadedly connected to the base plate (102). The first detection unit (1) is fitted and fixed between the first fixing block (61) and the second fixing block (62).

4. A detector for muon detection according to claim 3, characterized in that, The second fixing block (62) includes a base (63) and a limiting block (64). The base (63) is L-shaped. The base (63) is provided with a first threaded through hole (631) and a second threaded through hole (632) that are perpendicular to each other. The base (63) is mounted on the base plate (102) through the first threaded through hole (631) and screws. The limiting block (64) is provided with a limiting hole (641) that is aligned with the direction of the second threaded through hole (632). The limiting hole (641) does not penetrate the limiting block (64). The second threaded through hole (632) communicates with the limiting hole (641).

5. A detector for muon detection according to claim 3, characterized in that, The base plate (102) is provided with a boss (7), which is used to fix the first detection unit (1).

6. A detector for muon detection according to claim 3, characterized in that, The outer casing (10) is also provided with a tray (8), which is located above the second detection unit (2); the tray (8) is provided with a third fixing block (81) and a fourth fixing block (82), a round hole (83) is provided on one side edge of the tray (8) for installing the third fixing block (81), and a U-shaped hole (84) is provided on the opposite side edge of the tray (8) for installing the fourth fixing block (82). The second detection unit (2) is fitted and fixed between the third fixing block (81) and the fourth fixing block (82).

7. A detector for muon detection according to claim 6, characterized in that, The base plate (102) is provided with a plurality of fifth fixing blocks (103), which are respectively located on the outer periphery of the first detection unit (1). The support plate (8) is provided with fixing holes (85) corresponding to the fifth fixing blocks (103). A support structure (9) is provided between the fifth fixing blocks (103) and the support plate (8). The support plate (8) is installed on the fifth fixing blocks (103) by screws passing through the fixing holes (85) and the support structure (9) in sequence.

8. A detector for muon detection according to claim 1, characterized in that, The top of the outer casing (10) is provided with an outer casing cover plate (20), and the outer casing cover plate (20) and the outer casing (10) are provided with mounting holes (201) arranged opposite to each other.

9. A detector for muon detection according to claim 8, characterized in that, The top of the outer casing (10) is also provided with a groove (104) for installing a sealing strip.

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